[fix] synchronize Linux Wayland cursor shapes

scripts/linux/package_deb.sh

@@ -17,6 +17,7 @@ MAINTAINER="Junkun Di <junkun.di@hotmail.com>"
 DESCRIPTION="A simple cross-platform remote desktop client."
 ALSA_RUNTIME_DEP="libasound2 | libasound2t64"
 PORTAL_RUNTIME_RECOMMENDS="xdg-desktop-portal, xdg-desktop-portal-gtk | xdg-desktop-portal-kde | xdg-desktop-portal-wlr"
+TRAY_RUNTIME_RECOMMENDS="libayatana-appindicator3-1 | libappindicator3-1"
 
 SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 PROJECT_ROOT="$(cd "$SCRIPT_DIR/../.." && pwd)"
@@ -145,7 +146,7 @@ for size in 16 24 32 48 64 96 128 256; do
         "$ICON_BASE_DIR/${size}x${size}/apps/${PKG_NAME}.png"
 done
 
-RECOMMENDS="$PORTAL_RUNTIME_RECOMMENDS"
+RECOMMENDS="$PORTAL_RUNTIME_RECOMMENDS, $TRAY_RUNTIME_RECOMMENDS"
 if [[ -n "$EXTRA_RECOMMENDATION" ]]; then
     RECOMMENDS="$RECOMMENDS, $EXTRA_RECOMMENDATION"
 fi
@@ -157,7 +158,7 @@ Architecture: $DEBIAN_ARCH
 Maintainer: $MAINTAINER
 Description: $DESCRIPTION
 Depends: libc6 (>= 2.31), libstdc++6 (>= 10), libx11-6, libxext6,
- libxrender1, libxft2, libxrandr2, libxfixes3, libxcb1, libxcb-randr0,
+ libxrender1, libxft2, libxrandr2, libxfixes3, libxcursor1, libxcb1, libxcb-randr0,
  libxcb-xtest0, libxcb-xinerama0, libxcb-shape0, libxcb-xkb1,
  libxcb-xfixes0, libxv1, libxtst6, $ALSA_RUNTIME_DEP, libsndio7.0,
  libxcb-shm0, libpulse0, libdrm2, libdbus-1-3, libgl1

src/common/linux_cursor_shape.cpp

@@ -0,0 +1,402 @@
+#include "linux_cursor_shape.h"
+
+#include <algorithm>
+#include <array>
+#include <cctype>
+#include <cmath>
+#include <cstring>
+#include <limits>
+#include <string>
+#include <unordered_map>
+#include <utility>
+#include <vector>
+
+#if defined(__linux__) && !defined(__APPLE__)
+#include <X11/Xcursor/Xcursor.h>
+#include <X11/Xlib.h>
+#endif
+
+namespace crossdesk {
+namespace {
+
+constexpr LinuxCursorAlias kCursorAliases[] = {
+    {"help", RemoteCursorShape::help},
+    {"question-arrow", RemoteCursorShape::help},
+    {"left-ptr-help", RemoteCursorShape::help},
+    {"whats-this", RemoteCursorShape::help},
+    {"dnd-ask", RemoteCursorShape::help},
+    {"pointer", RemoteCursorShape::pointer},
+    {"hand", RemoteCursorShape::pointer},
+    {"hand1", RemoteCursorShape::pointer},
+    {"hand2", RemoteCursorShape::pointer},
+    {"link", RemoteCursorShape::pointer},
+    {"pointing-hand", RemoteCursorShape::pointer},
+    {"progress", RemoteCursorShape::progress},
+    {"left-ptr-watch", RemoteCursorShape::progress},
+    {"half-busy", RemoteCursorShape::progress},
+    {"wait", RemoteCursorShape::wait},
+    {"watch", RemoteCursorShape::wait},
+    {"crosshair", RemoteCursorShape::crosshair},
+    {"cross", RemoteCursorShape::crosshair},
+    {"cross-reverse", RemoteCursorShape::crosshair},
+    {"tcross", RemoteCursorShape::crosshair},
+    {"cell", RemoteCursorShape::crosshair},
+    {"plus", RemoteCursorShape::crosshair},
+    {"target", RemoteCursorShape::crosshair},
+    {"dotbox", RemoteCursorShape::crosshair},
+    {"dot-box-mask", RemoteCursorShape::crosshair},
+    {"text", RemoteCursorShape::text},
+    {"xterm", RemoteCursorShape::text},
+    {"ibeam", RemoteCursorShape::text},
+    {"vertical-text", RemoteCursorShape::text},
+    {"alias", RemoteCursorShape::alias},
+    {"dnd-link", RemoteCursorShape::alias},
+    {"copy", RemoteCursorShape::copy},
+    {"dnd-copy", RemoteCursorShape::copy},
+    {"move", RemoteCursorShape::move},
+    {"fleur", RemoteCursorShape::move},
+    {"size-all", RemoteCursorShape::move},
+    {"all-scroll", RemoteCursorShape::move},
+    {"dnd-move", RemoteCursorShape::move},
+    {"no-drop", RemoteCursorShape::no_drop},
+    {"dnd-no-drop", RemoteCursorShape::no_drop},
+    {"dnd-none", RemoteCursorShape::no_drop},
+    {"not-allowed", RemoteCursorShape::not_allowed},
+    {"forbidden", RemoteCursorShape::not_allowed},
+    {"crossed-circle", RemoteCursorShape::not_allowed},
+    {"circle", RemoteCursorShape::not_allowed},
+    {"pirate", RemoteCursorShape::not_allowed},
+    {"grab", RemoteCursorShape::grab},
+    {"openhand", RemoteCursorShape::grab},
+    {"open-hand", RemoteCursorShape::grab},
+    {"grabbing", RemoteCursorShape::grabbing},
+    {"closedhand", RemoteCursorShape::grabbing},
+    {"closed-hand", RemoteCursorShape::grabbing},
+    {"col-resize", RemoteCursorShape::col_resize},
+    {"row-resize", RemoteCursorShape::row_resize},
+    {"n-resize", RemoteCursorShape::n_resize},
+    {"top-side", RemoteCursorShape::n_resize},
+    {"top-tee", RemoteCursorShape::n_resize},
+    {"sb-up-arrow", RemoteCursorShape::n_resize},
+    {"e-resize", RemoteCursorShape::e_resize},
+    {"right-side", RemoteCursorShape::e_resize},
+    {"right-tee", RemoteCursorShape::e_resize},
+    {"sb-right-arrow", RemoteCursorShape::e_resize},
+    {"s-resize", RemoteCursorShape::s_resize},
+    {"bottom-side", RemoteCursorShape::s_resize},
+    {"bottom-tee", RemoteCursorShape::s_resize},
+    {"sb-down-arrow", RemoteCursorShape::s_resize},
+    {"w-resize", RemoteCursorShape::w_resize},
+    {"left-side", RemoteCursorShape::w_resize},
+    {"left-tee", RemoteCursorShape::w_resize},
+    {"sb-left-arrow", RemoteCursorShape::w_resize},
+    {"ne-resize", RemoteCursorShape::ne_resize},
+    {"top-right-corner", RemoteCursorShape::ne_resize},
+    {"ur-angle", RemoteCursorShape::ne_resize},
+    {"nw-resize", RemoteCursorShape::nw_resize},
+    {"top-left-corner", RemoteCursorShape::nw_resize},
+    {"ul-angle", RemoteCursorShape::nw_resize},
+    {"se-resize", RemoteCursorShape::se_resize},
+    {"bottom-right-corner", RemoteCursorShape::se_resize},
+    {"lr-angle", RemoteCursorShape::se_resize},
+    {"sw-resize", RemoteCursorShape::sw_resize},
+    {"bottom-left-corner", RemoteCursorShape::sw_resize},
+    {"ll-angle", RemoteCursorShape::sw_resize},
+    {"ew-resize", RemoteCursorShape::ew_resize},
+    {"sb-h-double-arrow", RemoteCursorShape::ew_resize},
+    {"h-double-arrow", RemoteCursorShape::ew_resize},
+    {"size-hor", RemoteCursorShape::ew_resize},
+    {"split-h", RemoteCursorShape::ew_resize},
+    {"exchange", RemoteCursorShape::ew_resize},
+    {"ns-resize", RemoteCursorShape::ns_resize},
+    {"sb-v-double-arrow", RemoteCursorShape::ns_resize},
+    {"v-double-arrow", RemoteCursorShape::ns_resize},
+    {"double-arrow", RemoteCursorShape::ns_resize},
+    {"size-ver", RemoteCursorShape::ns_resize},
+    {"split-v", RemoteCursorShape::ns_resize},
+    {"nesw-resize", RemoteCursorShape::nesw_resize},
+    {"fd-double-arrow", RemoteCursorShape::nesw_resize},
+    {"size-bdiag", RemoteCursorShape::nesw_resize},
+    {"nwse-resize", RemoteCursorShape::nwse_resize},
+    {"bd-double-arrow", RemoteCursorShape::nwse_resize},
+    {"size-fdiag", RemoteCursorShape::nwse_resize},
+    {"default", RemoteCursorShape::default_cursor},
+    {"left-ptr", RemoteCursorShape::default_cursor},
+    {"left-arrow", RemoteCursorShape::default_cursor},
+    {"arrow", RemoteCursorShape::default_cursor},
+    {"top-left-arrow", RemoteCursorShape::default_cursor},
+    {"right-ptr", RemoteCursorShape::default_cursor},
+    {"center-ptr", RemoteCursorShape::default_cursor},
+    {"context-menu", RemoteCursorShape::default_cursor},
+};
+
+std::string NormalizeCursorName(const std::string& raw_name) {
+  std::string normalized;
+  normalized.reserve(raw_name.size());
+  for (unsigned char ch : raw_name) {
+    if (ch == '_' || std::isspace(ch)) {
+      normalized.push_back('-');
+    } else {
+      normalized.push_back(static_cast<char>(std::tolower(ch)));
+    }
+  }
+  return normalized;
+}
+
+#if defined(__linux__) && !defined(__APPLE__)
+
+struct CursorCandidate {
+  RemoteCursorShape shape = RemoteCursorShape::default_cursor;
+  uint32_t width = 0;
+  uint32_t height = 0;
+  uint32_t xhot = 0;
+  uint32_t yhot = 0;
+  std::vector<uint32_t> argb;
+};
+
+uint8_t Alpha(uint32_t argb) {
+  return static_cast<uint8_t>((argb >> 24U) & 0xffU);
+}
+
+double BilinearAlpha(const CursorCandidate& candidate, double x, double y) {
+  if (candidate.width == 0 || candidate.height == 0) {
+    return 0.0;
+  }
+
+  x = std::max(0.0, std::min(x, static_cast<double>(candidate.width - 1)));
+  y = std::max(0.0, std::min(y, static_cast<double>(candidate.height - 1)));
+  const uint32_t x0 = static_cast<uint32_t>(std::floor(x));
+  const uint32_t y0 = static_cast<uint32_t>(std::floor(y));
+  const uint32_t x1 = std::min(x0 + 1, candidate.width - 1);
+  const uint32_t y1 = std::min(y0 + 1, candidate.height - 1);
+  const double fx = x - x0;
+  const double fy = y - y0;
+
+  const auto sample = [&](uint32_t px, uint32_t py) {
+    return static_cast<double>(
+        Alpha(candidate.argb[static_cast<size_t>(py) * candidate.width + px]));
+  };
+  const double top = sample(x0, y0) * (1.0 - fx) + sample(x1, y0) * fx;
+  const double bottom = sample(x0, y1) * (1.0 - fx) + sample(x1, y1) * fx;
+  return top * (1.0 - fy) + bottom * fy;
+}
+
+double SimilarityError(const LinuxCursorImageView& image,
+                       const CursorCandidate& candidate) {
+  if (!image.argb || image.width == 0 || image.height == 0 ||
+      candidate.argb.empty()) {
+    return std::numeric_limits<double>::infinity();
+  }
+
+  double alpha_error = 0.0;
+  for (uint32_t y = 0; y < image.height; ++y) {
+    const double source_y =
+        (static_cast<double>(y) + 0.5) * candidate.height / image.height - 0.5;
+    for (uint32_t x = 0; x < image.width; ++x) {
+      const double source_x = (static_cast<double>(x) + 0.5) *
+                                  candidate.width / image.width -
+                              0.5;
+      const double expected = BilinearAlpha(candidate, source_x, source_y);
+      const double actual = static_cast<double>(
+          Alpha(image.argb[static_cast<size_t>(y) * image.width + x]));
+      alpha_error += std::abs(actual - expected) / 255.0;
+    }
+  }
+  alpha_error /= static_cast<double>(image.width) * image.height;
+
+  const double observed_hot_x =
+      static_cast<double>(image.xhot) / std::max(1u, image.width);
+  const double observed_hot_y =
+      static_cast<double>(image.yhot) / std::max(1u, image.height);
+  const double candidate_hot_x =
+      static_cast<double>(candidate.xhot) / std::max(1u, candidate.width);
+  const double candidate_hot_y =
+      static_cast<double>(candidate.yhot) / std::max(1u, candidate.height);
+  const double hotspot_error =
+      std::abs(observed_hot_x - candidate_hot_x) +
+      std::abs(observed_hot_y - candidate_hot_y);
+
+  const double observed_aspect =
+      static_cast<double>(image.width) / image.height;
+  const double candidate_aspect =
+      static_cast<double>(candidate.width) / candidate.height;
+  const double aspect_error =
+      std::abs(std::log(observed_aspect / candidate_aspect));
+
+  return alpha_error + hotspot_error * 0.12 + aspect_error * 0.08;
+}
+
+bool SameImage(const LinuxCursorImageView& image,
+               const CursorCandidate& candidate) {
+  if (image.width != candidate.width || image.height != candidate.height ||
+      image.xhot != candidate.xhot || image.yhot != candidate.yhot) {
+    return false;
+  }
+  const size_t pixel_count =
+      static_cast<size_t>(image.width) * static_cast<size_t>(image.height);
+  return std::equal(image.argb, image.argb + pixel_count,
+                    candidate.argb.begin());
+}
+
+#endif
+
+}  // namespace
+
+const LinuxCursorAlias* LinuxCursorAliases(size_t* count) {
+  if (count) {
+    *count = sizeof(kCursorAliases) / sizeof(kCursorAliases[0]);
+  }
+  return kCursorAliases;
+}
+
+RemoteCursorShape ShapeFromLinuxCursorName(const std::string& raw_name) {
+  const std::string name = NormalizeCursorName(raw_name);
+  for (const auto& alias : kCursorAliases) {
+    if (name == alias.name) {
+      return alias.shape;
+    }
+  }
+
+  // Some toolkits prefix a theme or toolkit name to the standard cursor name.
+  // Restrict the fallback to separators so names such as "pointer-progress"
+  // still prefer their exact semantic alias above.
+  for (const auto& alias : kCursorAliases) {
+    const std::string suffix = std::string("-") + alias.name;
+    if (name.size() > suffix.size() &&
+        name.compare(name.size() - suffix.size(), suffix.size(), suffix) == 0) {
+      return alias.shape;
+    }
+  }
+  return RemoteCursorShape::default_cursor;
+}
+
+#if defined(__linux__) && !defined(__APPLE__)
+
+struct LinuxCursorThemeMatcher::Impl {
+  Display* display = XOpenDisplay(nullptr);
+  std::string theme;
+  int default_size = 24;
+  std::unordered_map<int, std::vector<CursorCandidate>> candidates_by_size;
+
+  Impl() {
+    if (!display) {
+      return;
+    }
+    if (const char* active_theme = XcursorGetTheme(display)) {
+      theme = active_theme;
+    }
+    const int active_size = XcursorGetDefaultSize(display);
+    if (active_size > 0) {
+      default_size = active_size;
+    }
+  }
+
+  ~Impl() {
+    if (display) {
+      XCloseDisplay(display);
+    }
+  }
+
+  const std::vector<CursorCandidate>& Candidates(int requested_size) {
+    requested_size = std::max(1, requested_size);
+    auto existing = candidates_by_size.find(requested_size);
+    if (existing != candidates_by_size.end()) {
+      return existing->second;
+    }
+
+    std::vector<CursorCandidate> candidates;
+    const char* theme_name = theme.empty() ? nullptr : theme.c_str();
+    for (const auto& alias : kCursorAliases) {
+      XcursorImages* images =
+          XcursorLibraryLoadImages(alias.name, theme_name, requested_size);
+      if (!images) {
+        continue;
+      }
+      for (int index = 0; index < images->nimage; ++index) {
+        const XcursorImage* image = images->images[index];
+        if (!image || !image->pixels || image->width == 0 ||
+            image->height == 0) {
+          continue;
+        }
+
+        CursorCandidate candidate;
+        candidate.shape = alias.shape;
+        candidate.width = image->width;
+        candidate.height = image->height;
+        candidate.xhot = image->xhot;
+        candidate.yhot = image->yhot;
+        const size_t pixel_count = static_cast<size_t>(image->width) *
+                                   static_cast<size_t>(image->height);
+        candidate.argb.assign(image->pixels, image->pixels + pixel_count);
+
+        const bool duplicate =
+            std::any_of(candidates.begin(), candidates.end(),
+                        [&](const CursorCandidate& current) {
+                          return current.shape == candidate.shape &&
+                                 current.width == candidate.width &&
+                                 current.height == candidate.height &&
+                                 current.xhot == candidate.xhot &&
+                                 current.yhot == candidate.yhot &&
+                                 current.argb == candidate.argb;
+                        });
+        if (!duplicate) {
+          candidates.push_back(std::move(candidate));
+        }
+      }
+      XcursorImagesDestroy(images);
+    }
+
+    return candidates_by_size
+        .emplace(requested_size, std::move(candidates))
+        .first->second;
+  }
+};
+
+#else
+
+struct LinuxCursorThemeMatcher::Impl {};
+
+#endif
+
+LinuxCursorThemeMatcher::LinuxCursorThemeMatcher()
+    : impl_(std::make_unique<Impl>()) {}
+
+LinuxCursorThemeMatcher::~LinuxCursorThemeMatcher() = default;
+
+RemoteCursorShape LinuxCursorThemeMatcher::Match(
+    const LinuxCursorImageView& image) {
+#if defined(__linux__) && !defined(__APPLE__)
+  if (!impl_ || !image.argb || image.width == 0 || image.height == 0) {
+    return RemoteCursorShape::default_cursor;
+  }
+
+  const int requested_size =
+      static_cast<int>(std::max(image.width, image.height));
+  const auto& candidates = impl_->Candidates(requested_size);
+  for (const auto& candidate : candidates) {
+    if (SameImage(image, candidate)) {
+      return candidate.shape;
+    }
+  }
+
+  double best_error = std::numeric_limits<double>::infinity();
+  RemoteCursorShape best_shape = RemoteCursorShape::default_cursor;
+  for (const auto& candidate : candidates) {
+    const double error = SimilarityError(image, candidate);
+    if (error < best_error) {
+      best_error = error;
+      best_shape = candidate.shape;
+    }
+  }
+
+  // Scaled theme cursors normally remain well below this threshold, while an
+  // unrelated custom application cursor should fall back to the default.
+  return best_error <= 0.20 ? best_shape
+                            : RemoteCursorShape::default_cursor;
+#else
+  (void)image;
+  return RemoteCursorShape::default_cursor;
+#endif
+}
+
+}  // namespace crossdesk

src/common/linux_cursor_shape.h

@@ -0,0 +1,49 @@
+#ifndef CROSSDESK_COMMON_LINUX_CURSOR_SHAPE_H_
+#define CROSSDESK_COMMON_LINUX_CURSOR_SHAPE_H_
+
+#include <cstddef>
+#include <cstdint>
+#include <memory>
+#include <string>
+
+#include "remote_cursor_shape.h"
+
+namespace crossdesk {
+
+struct LinuxCursorAlias {
+  const char* name;
+  RemoteCursorShape shape;
+};
+
+const LinuxCursorAlias* LinuxCursorAliases(size_t* count);
+RemoteCursorShape ShapeFromLinuxCursorName(const std::string& name);
+
+struct LinuxCursorImageView {
+  uint32_t width = 0;
+  uint32_t height = 0;
+  uint32_t xhot = 0;
+  uint32_t yhot = 0;
+  const uint32_t* argb = nullptr;
+};
+
+// Matches a compositor-provided cursor bitmap against the active Xcursor
+// theme. This is needed on Wayland, where XFixes only observes XWayland
+// cursors and cannot report cursors owned by native Wayland surfaces.
+class LinuxCursorThemeMatcher {
+ public:
+  LinuxCursorThemeMatcher();
+  ~LinuxCursorThemeMatcher();
+
+  LinuxCursorThemeMatcher(const LinuxCursorThemeMatcher&) = delete;
+  LinuxCursorThemeMatcher& operator=(const LinuxCursorThemeMatcher&) = delete;
+
+  RemoteCursorShape Match(const LinuxCursorImageView& image);
+
+ private:
+  struct Impl;
+  std::unique_ptr<Impl> impl_;
+};
+
+}  // namespace crossdesk
+
+#endif  // CROSSDESK_COMMON_LINUX_CURSOR_SHAPE_H_

src/common/remote_cursor_shape.h

@@ -0,0 +1,45 @@
+#ifndef CROSSDESK_COMMON_REMOTE_CURSOR_SHAPE_H_
+#define CROSSDESK_COMMON_REMOTE_CURSOR_SHAPE_H_
+
+#include <cstdint>
+
+namespace crossdesk {
+
+// Keep these values aligned with Slint's MouseCursor enum. The wire protocol
+// intentionally carries a semantic cursor instead of a platform handle so a
+// Windows, macOS or Linux host can control a different desktop platform.
+enum class RemoteCursorShape : uint8_t {
+  default_cursor = 0,
+  none,
+  help,
+  pointer,
+  progress,
+  wait,
+  crosshair,
+  text,
+  alias,
+  copy,
+  move,
+  no_drop,
+  not_allowed,
+  grab,
+  grabbing,
+  col_resize,
+  row_resize,
+  n_resize,
+  e_resize,
+  s_resize,
+  w_resize,
+  ne_resize,
+  nw_resize,
+  se_resize,
+  sw_resize,
+  ew_resize,
+  ns_resize,
+  nesw_resize,
+  nwse_resize,
+};
+
+}  // namespace crossdesk
+
+#endif  // CROSSDESK_COMMON_REMOTE_CURSOR_SHAPE_H_

src/common/shared_cursor_state.cpp

@@ -0,0 +1,42 @@
+#include "shared_cursor_state.h"
+
+#include <mutex>
+
+namespace crossdesk {
+namespace {
+
+std::mutex g_cursor_state_mutex;
+SharedCursorState g_cursor_state;
+bool g_cursor_state_available = false;
+
+}  // namespace
+
+void PublishSharedCursorState(bool visible, RemoteCursorShape shape) {
+  std::lock_guard<std::mutex> lock(g_cursor_state_mutex);
+  ++g_cursor_state.generation;
+  g_cursor_state.visible = visible;
+  g_cursor_state.shape = visible ? shape : RemoteCursorShape::none;
+  g_cursor_state_available = true;
+}
+
+bool GetSharedCursorState(SharedCursorState* state) {
+  if (!state) {
+    return false;
+  }
+  std::lock_guard<std::mutex> lock(g_cursor_state_mutex);
+  if (!g_cursor_state_available) {
+    return false;
+  }
+  *state = g_cursor_state;
+  return true;
+}
+
+void ClearSharedCursorState() {
+  std::lock_guard<std::mutex> lock(g_cursor_state_mutex);
+  ++g_cursor_state.generation;
+  g_cursor_state.visible = false;
+  g_cursor_state.shape = RemoteCursorShape::none;
+  g_cursor_state_available = false;
+}
+
+}  // namespace crossdesk

src/common/shared_cursor_state.h

@@ -0,0 +1,22 @@
+#ifndef CROSSDESK_COMMON_SHARED_CURSOR_STATE_H_
+#define CROSSDESK_COMMON_SHARED_CURSOR_STATE_H_
+
+#include <cstdint>
+
+#include "remote_cursor_shape.h"
+
+namespace crossdesk {
+
+struct SharedCursorState {
+  uint64_t generation = 0;
+  bool visible = false;
+  RemoteCursorShape shape = RemoteCursorShape::default_cursor;
+};
+
+void PublishSharedCursorState(bool visible, RemoteCursorShape shape);
+bool GetSharedCursorState(SharedCursorState* state);
+void ClearSharedCursorState();
+
+}  // namespace crossdesk
+
+#endif  // CROSSDESK_COMMON_SHARED_CURSOR_STATE_H_

src/config_center/config_center.cpp

@@ -34,6 +34,8 @@ int ConfigCenter::Load() {
   persist_config_migration |= ini_.Delete(section_, "screen_content");
   persist_config_migration |=
       ini_.Delete(section_, "enable_desktop_quality_optimization");
+  persist_config_migration |=
+      ini_.Delete(section_, "enable_minimize_to_tray");
 
   const long language_value =
       ini_.GetLongValue(section_, "language", static_cast<long>(language_));
@@ -109,8 +111,6 @@ int ConfigCenter::Load() {
   enable_autostart_ =
       ini_.GetBoolValue(section_, "enable_autostart", enable_autostart_);
   enable_daemon_ = ini_.GetBoolValue(section_, "enable_daemon", enable_daemon_);
-  enable_minimize_to_tray_ = ini_.GetBoolValue(
-      section_, "enable_minimize_to_tray", enable_minimize_to_tray_);
   portable_service_prompt_suppressed_ =
       ini_.GetBoolValue(section_, "portable_service_prompt_suppressed",
                         portable_service_prompt_suppressed_);
@@ -157,8 +157,6 @@ int ConfigCenter::Save() {
 
   ini_.SetBoolValue(section_, "enable_autostart", enable_autostart_);
   ini_.SetBoolValue(section_, "enable_daemon", enable_daemon_);
-  ini_.SetBoolValue(section_, "enable_minimize_to_tray",
-                    enable_minimize_to_tray_);
   ini_.SetBoolValue(section_, "portable_service_prompt_suppressed",
                     portable_service_prompt_suppressed_);
 
@@ -338,17 +336,6 @@ int ConfigCenter::SetSelfHosted(bool enable_self_hosted) {
   return 0;
 }
 
-int ConfigCenter::SetMinimizeToTray(bool enable_minimize_to_tray) {
-  enable_minimize_to_tray_ = enable_minimize_to_tray;
-  ini_.SetBoolValue(section_, "enable_minimize_to_tray",
-                    enable_minimize_to_tray_);
-  SI_Error rc = ini_.SaveFile(config_path_.c_str());
-  if (rc < 0) {
-    return -1;
-  }
-  return 0;
-}
-
 int ConfigCenter::SetAutostart(bool enable_autostart) {
   enable_autostart_ = enable_autostart;
   bool success = false;
@@ -448,8 +435,6 @@ int ConfigCenter::GetDefaultCoturnServerPort() const {
 
 bool ConfigCenter::IsSelfHosted() const { return enable_self_hosted_; }
 
-bool ConfigCenter::IsMinimizeToTray() const { return enable_minimize_to_tray_; }
-
 bool ConfigCenter::IsEnableAutostart() const { return enable_autostart_; }
 
 bool ConfigCenter::IsEnableDaemon() const { return enable_daemon_; }

src/config_center/config_center.h

@@ -43,7 +43,6 @@ class ConfigCenter {
   int SetServerPort(int signal_server_port);
   int SetCoturnServerPort(int coturn_server_port);
   int SetSelfHosted(bool enable_self_hosted);
-  int SetMinimizeToTray(bool enable_minimize_to_tray);
   int SetAutostart(bool enable_autostart);
   int SetDaemon(bool enable_daemon);
   int SetPortableServicePromptSuppressed(bool suppressed);
@@ -66,7 +65,6 @@ class ConfigCenter {
   int GetDefaultSignalServerPort() const;
   int GetDefaultCoturnServerPort() const;
   bool IsSelfHosted() const;
-  bool IsMinimizeToTray() const;
   bool IsEnableAutostart() const;
   bool IsEnableDaemon() const;
   bool IsPortableServicePromptSuppressed() const;
@@ -94,7 +92,6 @@ class ConfigCenter {
   int coturn_server_port_ = 0;
   int coturn_server_port_default_ = 3478;
   bool enable_self_hosted_ = false;
-  bool enable_minimize_to_tray_ = false;
   bool enable_autostart_ = false;
   bool enable_daemon_ = false;
   bool portable_service_prompt_suppressed_ = false;

src/device_controller/device_controller.h

@@ -15,6 +15,7 @@
 #include <string>
 
 #include "display_info.h"
+#include "remote_cursor_shape.h"
 using json = nlohmann::json;
 
 namespace crossdesk {
@@ -28,6 +29,7 @@ typedef enum {
   service_status = 5,
   service_command = 6,
   keyboard_state = 7,
+  cursor_state = 8,
 } ControlType;
 typedef enum {
   move = 0,
@@ -70,6 +72,12 @@ typedef struct {
   KeyboardStateKey pressed_keys[kMaxKeyboardStateKeys];
 } KeyboardState;
 
+typedef struct {
+  uint32_t seq;
+  bool visible;
+  RemoteCursorShape shape;
+} CursorState;
+
 typedef struct {
   char host_name[64];
   size_t host_name_size;
@@ -96,6 +104,7 @@ struct RemoteAction {
     Mouse m;
     Key k;
     KeyboardState ks;
+    CursorState cs;
     HostInfo i;
     bool a;
     int d;
@@ -141,6 +150,11 @@ struct RemoteAction {
         j["keyboard_state"] = {{"seq", a.ks.seq}, {"pressed_keys", keys}};
         break;
       }
+      case ControlType::cursor_state:
+        j["cursor_state"] = {{"seq", a.cs.seq},
+                             {"visible", a.cs.visible},
+                             {"shape", static_cast<int>(a.cs.shape)}};
+        break;
       case ControlType::audio_capture:
         j["audio_capture"] = a.a;
         break;
@@ -219,6 +233,18 @@ struct RemoteAction {
           out.ks.pressed_count = count;
           break;
         }
+        case ControlType::cursor_state: {
+          const auto& cursor_state_json = j.at("cursor_state");
+          const int shape = cursor_state_json.at("shape").get<int>();
+          if (shape < static_cast<int>(RemoteCursorShape::default_cursor) ||
+              shape > static_cast<int>(RemoteCursorShape::nwse_resize)) {
+            return false;
+          }
+          out.cs.seq = cursor_state_json.at("seq").get<uint32_t>();
+          out.cs.visible = cursor_state_json.at("visible").get<bool>();
+          out.cs.shape = static_cast<RemoteCursorShape>(shape);
+          break;
+        }
         case ControlType::audio_capture:
           out.a = j.at("audio_capture").get<bool>();
           break;

src/gui/application/gui_application.cpp

@@ -1,7 +1,6 @@
 #include "application/gui_application.h"
 
 #include <SDL3/SDL.h>
-#include <libyuv.h>
 #include <slint.h>
 #include <tinyfiledialogs.h>
 
@@ -29,16 +28,14 @@
 #include "crossdesk_ui.h"
 #include "fa_solid_900.h"
 #include "localization.h"
-#include "nv12_scaler.h"
 #include "platform.h"
+#include "platform/video_renderer.h"
+#include "rendering/slint_video_presenter.h"
 #if _WIN32
 #include <windows.h>
-#include <GL/gl.h>
 
 #include "platform/tray/win_tray.h"
-#include "platform/windows_opengl_video_renderer.h"
 #elif defined(__APPLE__)
-#include "platform/metal_video_renderer.h"
 #include "platform/tray/mac_tray.h"
 #include "platform/window_drag.h"
 #elif defined(__linux__)
@@ -60,41 +57,6 @@ namespace {
 
 using namespace std::chrono_literals;
 
-#if !defined(__APPLE__)
-constexpr GLint kGlClampToEdge = 0x812F;
-#else
-constexpr int kMetalAttachmentAttemptLimit = 30;
-#endif
-
-struct VideoRenderSize {
-  int width = 0;
-  int height = 0;
-
-  bool operator==(const VideoRenderSize&) const = default;
-};
-
-VideoRenderSize FitVideoToRenderArea(int source_width, int source_height,
-                                     int area_width, int area_height) {
-  if (source_width <= 0 || source_height <= 0 || area_width <= 0 ||
-      area_height <= 0) {
-    return {};
-  }
-
-  const double scale =
-      std::min({1.0, static_cast<double>(area_width) / source_width,
-                static_cast<double>(area_height) / source_height});
-  int width = std::max(2, static_cast<int>(std::floor(source_width * scale)));
-  int height =
-      std::max(2, static_cast<int>(std::floor(source_height * scale)));
-
-  // NV12 chroma samples cover 2x2 pixels. Keep the render buffer even-sized
-  // so libyuv never needs to read a partial chroma sample at the edge.
-  width &= ~1;
-  height &= ~1;
-  return {std::min(width, source_width & ~1),
-          std::min(height, source_height & ~1)};
-}
-
 std::string CreatePasswordChangeRequestId(uint64_t sequence) {
   const auto timestamp = std::chrono::system_clock::now()
                              .time_since_epoch()
@@ -930,19 +892,7 @@ struct GuiApplication::SlintUi {
   std::shared_ptr<slint::VectorModel<slint::SharedString>>
       controller_name_model =
           std::make_shared<slint::VectorModel<slint::SharedString>>();
-  std::unordered_map<std::string, uint64_t> displayed_frame_sequence;
-  std::vector<uint8_t> scaled_video_frame;
-  std::vector<uint8_t> scaled_video_frame_scratch;
-#if !defined(__APPLE__)
-  std::mutex video_gl_mutex;
-  std::vector<uint8_t> video_gl_conversion_frame;
-  std::vector<uint8_t> video_gl_pending_frame;
-  uint32_t video_gl_texture = 0;
-  VideoRenderSize video_gl_texture_size;
-  VideoRenderSize video_gl_image_size;
-  VideoRenderSize video_gl_pending_size;
-  bool video_gl_pending_dirty = false;
-#endif
+  std::unique_ptr<SlintVideoPresenter> video_presenter;
   std::vector<std::string> tab_order;
   std::vector<std::string> tab_ids;
   std::string tab_model_signature;
@@ -957,9 +907,6 @@ struct GuiApplication::SlintUi {
   WindowDragState server_drag;
   int main_native_titlebar_attempts = 30;
   int stream_live_resize_configuration_attempts = 0;
-#if defined(__APPLE__)
-  int stream_video_attachment_attempts = 0;
-#endif
   int stream_initial_position_attempts = 0;
   int server_initial_position_attempts = 0;
 #if _WIN32
@@ -1114,15 +1061,9 @@ void GuiApplication::InitializeModules() {
   if (modules_inited_) {
     return;
   }
-#if defined(_WIN32)
-  windows_opengl_video_renderer_ =
-      std::make_unique<WindowsOpenGlVideoRenderer>();
-#elif defined(__APPLE__)
-  // Metal setup can log device, shader, or pipeline failures. Initialize it
-  // here, after Run() has selected the application's log directory, rather
-  // than from GuiRuntime's constructor before InitializeLogger().
-  mac_metal_video_renderer_ = std::make_unique<MacMetalVideoRenderer>();
-#endif
+  // Renderer construction can log device, shader, or pipeline failures.
+  // Initialize it after Run() has selected the application's log directory.
+  video_renderer_ = CreateVideoRenderer();
   devices_.Initialize();
   CreateConnectionPeer();
   modules_inited_ = true;
@@ -1157,6 +1098,8 @@ void GuiApplication::InitializeUi() {
   }
 #endif
   ui_ = std::make_unique<SlintUi>();
+  ui_->video_presenter =
+      std::make_unique<SlintVideoPresenter>(*video_renderer_);
 #if _WIN32
   ui_->main->set_custom_titlebar(true);
 #elif defined(__linux__)
@@ -1220,22 +1163,24 @@ void GuiApplication::InitializeSystemTray() {
   };
 #if _WIN32
   ui_->tray = std::make_unique<WinTray>(
-      std::move(show_window), std::move(hide_window), std::move(exit_app),
-      LoadSlintTrayIcon(), L"CrossDesk", localization_language_index_);
+      std::move(show_window), std::move(hide_window),
+      std::move(open_settings), std::move(exit_app), LoadSlintTrayIcon(),
+      L"CrossDesk", localization_language_index_);
 #elif defined(__APPLE__)
   ui_->tray = std::make_unique<MacTray>(
       std::move(show_window), std::move(hide_window), std::move(open_settings),
       std::move(exit_app), "CrossDesk", localization_language_index_);
 #elif defined(__linux__)
   ui_->tray = std::make_unique<LinuxTray>(
-      std::move(show_window), std::move(hide_window), std::move(exit_app),
-      "CrossDesk", localization_language_index_);
+      std::move(show_window), std::move(hide_window),
+      std::move(open_settings), std::move(exit_app), "CrossDesk",
+      localization_language_index_);
 #endif
 #endif
 }
 
 bool GuiApplication::MinimizeMainWindowToTray() {
-  if (!enable_minimize_to_tray_ || !ui_) {
+  if (!ui_) {
     return false;
   }
 #if _WIN32 || defined(__APPLE__)
@@ -1265,7 +1210,6 @@ void GuiApplication::ResetSettingsUi() {
   ui_->main->set_self_hosted_enabled(enable_self_hosted_);
   ui_->main->set_autostart_enabled(enable_autostart_);
   ui_->main->set_daemon_enabled(enable_daemon_);
-  ui_->main->set_minimize_to_tray_enabled(enable_minimize_to_tray_);
   ui_->main->set_file_save_path(file_transfer_save_path_buf_);
   ui_->main->set_server_host(signal_server_ip_self_);
   ui_->main->set_server_port(signal_server_port_self_);
@@ -1275,12 +1219,10 @@ void GuiApplication::ResetSettingsUi() {
 void GuiApplication::BindMainCallbacks() {
   auto& main = ui_->main;
   main->window().on_close_requested([this] {
-    if (MinimizeMainWindowToTray()) {
-      // MinimizeMainWindowToTray() ensures the tray icon exists. Let Slint
-      // complete the close request by hiding the main window as well.
-      return slint::CloseRequestResponse::HideWindow;
-    }
-    exit_ = true;
+    // Keep the application and all active sessions alive. The tray helper
+    // ensures that supported platforms still provide a way to restore the
+    // main window; Slint hides it regardless of tray availability.
+    MinimizeMainWindowToTray();
     return slint::CloseRequestResponse::HideWindow;
   });
   main->on_main_title_drag([this](int phase, float x, float y) {
@@ -1297,11 +1239,7 @@ void GuiApplication::BindMainCallbacks() {
     if (!ui_) {
       return;
     }
-    if (MinimizeMainWindowToTray()) {
-      ui_->main->hide();
-      return;
-    }
-    exit_ = true;
+    MinimizeMainWindowToTray();
     ui_->main->hide();
   });
   main->on_copy_local_id([this] {
@@ -1858,6 +1796,7 @@ void GuiApplication::Tick() {
   SyncStreamKeyboardFocus();
 #endif
   devices_.UpdateInteractions();
+  ShareLocalCursorState();
 
   UpdateLocalization();
   SyncMainWindow();
@@ -1867,6 +1806,63 @@ void GuiApplication::Tick() {
   SyncServerWindow();
 }
 
+void GuiApplication::ShareLocalCursorState() {
+  constexpr auto kCursorStateHeartbeatInterval = 500ms;
+
+  bool has_connected_controller = false;
+  {
+    std::shared_lock lock(connection_status_mutex_);
+    has_connected_controller =
+        std::any_of(connection_status_.begin(), connection_status_.end(),
+                    [](const auto& entry) {
+                      return entry.second == ConnectionStatus::Connected;
+                    });
+  }
+  if (!is_server_mode_ || !peer_ || !has_connected_controller) {
+    has_shared_cursor_state_ = false;
+    last_cursor_state_share_time_ = {};
+    return;
+  }
+
+  CursorState sampled{};
+  if (!cursor_state_provider_.Sample(&sampled)) {
+    return;
+  }
+
+  const auto now = std::chrono::steady_clock::now();
+  const bool changed =
+      !has_shared_cursor_state_ ||
+      sampled.visible != last_shared_cursor_state_.visible ||
+      sampled.shape != last_shared_cursor_state_.shape;
+  const bool heartbeat_due =
+      last_cursor_state_share_time_.time_since_epoch().count() == 0 ||
+      now - last_cursor_state_share_time_ >= kCursorStateHeartbeatInterval;
+  if (!changed && !heartbeat_due) {
+    return;
+  }
+
+  sampled.seq = ++cursor_state_sequence_;
+  RemoteAction action{};
+  action.type = ControlType::cursor_state;
+  action.cs = sampled;
+  const std::string message = action.to_json();
+  const int result = SendDataFrame(peer_, message.c_str(), message.size(),
+                                   mouse_label_.c_str());
+  if (result != 0) {
+    LOG_WARN("Send cursor state failed, ret={}", result);
+    return;
+  }
+
+  if (changed) {
+    LOG_INFO("Sent cursor state: seq={}, visible={}, shape={}", sampled.seq,
+             sampled.visible, static_cast<int>(sampled.shape));
+  }
+
+  last_shared_cursor_state_ = sampled;
+  has_shared_cursor_state_ = true;
+  last_cursor_state_share_time_ = now;
+}
+
 void GuiApplication::HandlePasswordChangeResult() {
   bool succeeded = false;
   bool uncertain = false;
@@ -2261,9 +2257,6 @@ void GuiApplication::SyncStreamKeyboardFocus() {
 }
 
 void GuiApplication::SyncStreamWindow() {
-#if defined(__APPLE__)
-  bool stream_window_created_this_sync = false;
-#endif
   bool has_sessions = false;
   {
     std::shared_lock lock(remote_sessions_mutex_);
@@ -2275,15 +2268,7 @@ void GuiApplication::SyncStreamWindow() {
     (*ui_->stream)->set_custom_titlebar(use_xwayland_gui_);
 #endif
     RegisterFontAwesome((*ui_->stream)->window());
-#if defined(__APPLE__)
-    // Commit the first visible AppKit window as an ordinary opaque window.
-    // The process-wide Slint event loop is already running here, so
-    // appkit_view() may exist before show(); that does not mean the native
-    // titlebar style has been committed yet.
-    (*ui_->stream)->set_native_video_enabled(false);
-#else
     ConfigureStreamVideoRenderer();
-#endif
     // Slint globals belong to a component tree. Force the next localization
     // pass to initialize the newly-created, independent stream window tree.
     ui_->localized_language = -1;
@@ -2293,15 +2278,11 @@ void GuiApplication::SyncStreamWindow() {
     (*ui_->stream)->set_stats_rows(ui_->stats_model);
     BindStreamCallbacks();
     (*ui_->stream)->show();
-#if defined(__APPLE__)
-    stream_window_created_this_sync = true;
-#endif
     // Repeat after the next layout pass because the backend resolves the
     // initial DPI and preferred size asynchronously on some platforms.
     ui_->stream_initial_position_attempts = 2;
 #if defined(__APPLE__)
     ui_->stream_live_resize_configuration_attempts = 30;
-    ui_->stream_video_attachment_attempts = kMetalAttachmentAttemptLimit;
 #endif
     stream_window_created_ = true;
     stream_window_inited_ = true;
@@ -2321,24 +2302,10 @@ void GuiApplication::SyncStreamWindow() {
       --ui_->stream_live_resize_configuration_attempts;
     }
   }
-  if (ui_->stream_video_attachment_attempts > 0 &&
-      !stream_window_created_this_sync) {
-    ConfigureStreamVideoRenderer();
-    const bool metal_unavailable =
-        !mac_metal_video_renderer_ || !mac_metal_video_renderer_->IsReady();
-    const bool metal_attached =
-        mac_metal_video_renderer_ && mac_metal_video_renderer_->IsAttached();
-    if (metal_unavailable) {
-      ui_->stream_video_attachment_attempts = 0;
-    } else if (metal_attached) {
-      video_frame_dirty_.store(true, std::memory_order_release);
-      ui_->stream_video_attachment_attempts = 0;
-    } else if (--ui_->stream_video_attachment_attempts == 0) {
-      (*ui_->stream)->set_native_video_enabled(false);
-      LOG_WARN("Unable to attach the Metal video surface; using CPU rendering");
-    }
-  }
 #endif
+  if (ui_->video_presenter && ui_->video_presenter->EnsureAttached()) {
+    video_frame_dirty_.store(true, std::memory_order_release);
+  }
   if (ui_->stream_initial_position_attempts > 0) {
     if (PositionWindowAtCenter(
             (*ui_->stream)->window(), ui_->main->window(),
@@ -2351,29 +2318,20 @@ void GuiApplication::SyncStreamWindow() {
   }
   if (!has_sessions) {
     SetStreamKeyboardFocus(false);
-#if defined(_WIN32)
-    if (windows_opengl_video_renderer_) {
-      windows_opengl_video_renderer_->SetSelectedStream({});
-    }
-#endif
 #if defined(__APPLE__)
     void* stream_view = (*ui_->stream)->window().appkit_view();
     SetStreamWindowFullscreen(false);
     UnregisterStreamWindow(stream_view);
-    if (mac_metal_video_renderer_) {
-      mac_metal_video_renderer_->SetSelectedStream({});
-      mac_metal_video_renderer_->Detach();
-    }
 #endif
+    if (ui_->video_presenter) {
+      ui_->video_presenter->Detach();
+    }
     (*ui_->stream)->hide();
     ui_->stream.reset();
     stream_window_created_ = false;
     stream_window_inited_ = false;
     ui_->stream_initial_position_attempts = 0;
     ui_->stream_live_resize_configuration_attempts = 0;
-#if defined(__APPLE__)
-    ui_->stream_video_attachment_attempts = 0;
-#endif
     focused_remote_id_.clear();
     controlled_remote_id_.clear();
     ui_->tab_order.clear();
@@ -2464,6 +2422,23 @@ void GuiApplication::SyncStreamWindow() {
               ? localization::receiving_screen[localization_language_index_]
               : std::string{}));
   (*ui_->stream)->set_mouse_control_enabled(props->control_mouse_);
+  int remote_cursor_shape =
+      static_cast<int>(RemoteCursorShape::default_cursor);
+  bool remote_cursor_active = false;
+  {
+    std::lock_guard lock(props->remote_cursor_state_mutex_);
+    remote_cursor_active =
+        status == ConnectionStatus::Connected && props->control_mouse_ &&
+        props->remote_cursor_state_received_;
+    if (remote_cursor_active) {
+      remote_cursor_shape = static_cast<int>(
+          props->remote_cursor_state_.visible
+              ? props->remote_cursor_state_.shape
+              : RemoteCursorShape::none);
+    }
+  }
+  (*ui_->stream)->set_remote_cursor_active(remote_cursor_active);
+  (*ui_->stream)->set_remote_cursor_shape(remote_cursor_shape);
   (*ui_->stream)->set_audio_enabled(props->audio_capture_button_pressed_);
 #if defined(__APPLE__)
   fullscreen_button_pressed_ = IsStreamWindowFullscreen();
@@ -2590,7 +2565,7 @@ void GuiApplication::SyncStreamWindow() {
 }
 
 void GuiApplication::SyncStreamVideoFrame() {
-  if (!ui_ || !ui_->stream) {
+  if (!ui_ || !ui_->stream || !ui_->video_presenter) {
     return;
   }
   auto props = SelectedSession();
@@ -2598,421 +2573,46 @@ void GuiApplication::SyncStreamVideoFrame() {
     return;
   }
 
-#if defined(__APPLE__)
-  if (mac_metal_video_renderer_ && mac_metal_video_renderer_->IsReady() &&
-      mac_metal_video_renderer_->IsAttached()) {
-    const double top_inset =
-        !fullscreen_button_pressed_ && ui_->tab_ids.size() > 1 ? 30.0 : 0.0;
-    const auto render_outcome = mac_metal_video_renderer_->RenderLatest(
-        props->remote_id_, top_inset, !fullscreen_button_pressed_);
-    if (render_outcome.result ==
-        MacMetalVideoRenderer::RenderResult::rendered) {
-      if (!(*ui_->stream)->get_has_frame()) {
-        (*ui_->stream)->set_has_frame(true);
-      }
-      if (!(*ui_->stream)->get_receiving_text().empty()) {
-        (*ui_->stream)->set_receiving_text("");
-      }
-      if (render_outcome.width > 0 && render_outcome.height > 0 &&
-          render_outcome.sequence > 0) {
-        (*ui_->stream)
-            ->set_stats_resolution(
-                UiText(std::to_string(render_outcome.width) + "x" +
-                       std::to_string(render_outcome.height)));
-        if (ui_->displayed_frame_sequence[props->remote_id_] !=
-            render_outcome.sequence) {
-          ui_->displayed_frame_sequence[props->remote_id_] =
-              render_outcome.sequence;
-          ++props->frame_count_;
-        }
-      }
-      return;
-    }
-    if (render_outcome.result == MacMetalVideoRenderer::RenderResult::empty) {
-      if ((*ui_->stream)->get_has_frame()) {
-        (*ui_->stream)->set_has_frame(false);
-      }
-      return;
-    }
-    if (render_outcome.result == MacMetalVideoRenderer::RenderResult::idle) {
-      return;
-    }
-    // A transient Metal error must not change renderer ownership mid-window.
-    // Keep the last frame and retry on the next UI tick.
-    return;
-  }
-#endif
-
-#if defined(_WIN32)
-  if (windows_opengl_video_renderer_ &&
-      windows_opengl_video_renderer_->IsReady()) {
-    windows_opengl_video_renderer_->SetSelectedStream(props->remote_id_);
-    SubmitCachedFrameToOpenGl(props);
-    if (!(*ui_->stream)->get_native_video_enabled()) {
-      (*ui_->stream)->set_native_video_enabled(true);
-    }
-
-    int width = 0;
-    int height = 0;
-    uint64_t sequence = 0;
-    {
-      std::lock_guard lock(props->video_frame_mutex_);
-      width = props->video_width_;
-      height = props->video_height_;
-      sequence = props->video_frame_sequence_;
-    }
-    const bool has_frame = width > 0 && height > 0 && sequence > 0;
-    (*ui_->stream)->set_has_frame(has_frame);
-    if (has_frame) {
-      (*ui_->stream)->set_receiving_text("");
-      (*ui_->stream)
-          ->set_stats_resolution(UiText(std::to_string(width) + "x" +
-                                        std::to_string(height)));
-      if (ui_->displayed_frame_sequence[props->remote_id_] != sequence) {
-        ui_->displayed_frame_sequence[props->remote_id_] = sequence;
-        ++props->frame_count_;
-      }
-    }
-    (*ui_->stream)->window().request_redraw();
-    return;
-  }
-  if ((*ui_->stream)->get_native_video_enabled()) {
-    (*ui_->stream)->set_native_video_enabled(false);
-  }
-#endif
-
-  std::shared_ptr<std::vector<unsigned char>> frame;
-  int width = 0;
-  int height = 0;
-  uint64_t sequence = 0;
+  SlintVideoPresenter::Frame frame;
+  frame.remote_id = props->remote_id_;
   {
     std::lock_guard lock(props->video_frame_mutex_);
-    frame = props->front_frame_;
-    width = props->video_width_;
-    height = props->video_height_;
-    sequence = props->video_frame_sequence_;
+    frame.nv12 = props->front_frame_;
+    frame.width = props->video_width_;
+    frame.height = props->video_height_;
+    frame.sequence = props->video_frame_sequence_;
   }
 
-  const size_t nv12_size = static_cast<size_t>(width) * height * 3 / 2;
-  if (!frame || width <= 0 || height <= 0 || frame->size() < nv12_size) {
-    (*ui_->stream)->set_has_frame(false);
-    return;
+  const auto result = ui_->video_presenter->Present(frame);
+  if (result.width > 0 && result.height > 0) {
+    (*ui_->stream)
+        ->set_stats_resolution(UiText(std::to_string(result.width) + "x" +
+                                      std::to_string(result.height)));
   }
-  if (ui_->displayed_frame_sequence[props->remote_id_] == sequence) {
-    return;
-  }
-
-  const auto window_size = (*ui_->stream)->window().size();
-  const VideoRenderSize render_size = FitVideoToRenderArea(
-      width, height, static_cast<int>(window_size.width),
-      static_cast<int>(window_size.height));
-  const uint8_t* y_plane = frame->data();
-  const uint8_t* uv_plane =
-      frame->data() + static_cast<size_t>(width) * height;
-  int output_width = width;
-  int output_height = height;
-
-  if (render_size.width > 0 && render_size.height > 0 &&
-      (render_size.width != width || render_size.height != height)) {
-    const size_t scaled_nv12_size =
-        static_cast<size_t>(render_size.width) * render_size.height * 3 / 2;
-    ui_->scaled_video_frame.resize(scaled_nv12_size);
-    uint8_t* scaled_y = ui_->scaled_video_frame.data();
-    uint8_t* scaled_uv =
-        scaled_y +
-        static_cast<size_t>(render_size.width) * render_size.height;
-    if (ScaleNv12ViaI420(
-            y_plane, width, uv_plane, width, width, height, scaled_y,
-            render_size.width, scaled_uv, render_size.width, render_size.width,
-            render_size.height, libyuv::kFilterBox,
-            &ui_->scaled_video_frame_scratch) == 0) {
-      y_plane = scaled_y;
-      uv_plane = scaled_uv;
-      output_width = render_size.width;
-      output_height = render_size.height;
-    }
-  }
-
-#if !defined(__APPLE__)
-  uint32_t texture_id = 0;
-  {
-    std::lock_guard lock(ui_->video_gl_mutex);
-    texture_id = ui_->video_gl_texture;
-  }
-  if (texture_id != 0) {
-    ui_->video_gl_conversion_frame.resize(
-        static_cast<size_t>(output_width) * output_height * 4);
-    if (libyuv::NV12ToABGR(
-            y_plane, output_width, uv_plane, output_width,
-            ui_->video_gl_conversion_frame.data(), output_width * 4,
-            output_width, output_height) != 0) {
-      return;
-    }
-    {
-      std::lock_guard lock(ui_->video_gl_mutex);
-      if (ui_->video_gl_texture == 0) {
-        return;
-      }
-      texture_id = ui_->video_gl_texture;
-      ui_->video_gl_pending_frame.swap(ui_->video_gl_conversion_frame);
-      ui_->video_gl_pending_size = {output_width, output_height};
-      ui_->video_gl_pending_dirty = true;
-    }
-    const VideoRenderSize output_size{output_width, output_height};
-    if (ui_->video_gl_image_size != output_size) {
-      (*ui_->stream)
-          ->set_frame(slint::Image::create_from_borrowed_gl_2d_rgba_texture(
-              texture_id,
-              slint::Size<uint32_t>{static_cast<uint32_t>(output_width),
-                                    static_cast<uint32_t>(output_height)}));
-      ui_->video_gl_image_size = output_size;
-    }
-    (*ui_->stream)->set_has_frame(true);
-    (*ui_->stream)->set_receiving_text("");
-    (*ui_->stream)->window().request_redraw();
-    ui_->displayed_frame_sequence[props->remote_id_] = sequence;
+  if (result.new_frame) {
     ++props->frame_count_;
-    return;
   }
-#endif
-
-  slint::SharedPixelBuffer<slint::Rgb8Pixel> pixels(output_width,
-                                                    output_height);
-  if (libyuv::NV12ToRAW(
-          y_plane, output_width, uv_plane, output_width,
-          reinterpret_cast<uint8_t*>(pixels.begin()), output_width * 3,
-          output_width, output_height) != 0) {
-    return;
-  }
-
-  (*ui_->stream)->set_frame(slint::Image(std::move(pixels)));
-  (*ui_->stream)->set_has_frame(true);
-  (*ui_->stream)->set_receiving_text("");
-  ui_->displayed_frame_sequence[props->remote_id_] = sequence;
-  ++props->frame_count_;
 }
 
 void GuiApplication::ConfigureStreamVideoRenderer() {
-#if defined(__APPLE__)
-  if (!ui_ || !ui_->stream) {
+  if (!ui_ || !ui_->stream || !ui_->video_presenter) {
     return;
   }
-  const bool native_video_enabled =
-      mac_metal_video_renderer_ && mac_metal_video_renderer_->IsReady();
-  if (!native_video_enabled) {
-    (*ui_->stream)->set_native_video_enabled(false);
-    return;
-  }
-  if (void* view = (*ui_->stream)->window().appkit_view()) {
-    // Slint applies transparency through a property binding. Set it before
-    // restoring the AppKit titlebar so the later operation wins regardless of
-    // whether the backend commits the binding synchronously or next tick.
-    (*ui_->stream)->set_native_video_enabled(true);
-    if (!mac_metal_video_renderer_->Attach(view)) {
-      (*ui_->stream)->set_native_video_enabled(false);
-    } else if (auto selected_session = SelectedSession()) {
-      // Metal owns a separate monotonic sequence, so discard a CPU-renderer
-      // sequence recorded during the short window-attachment gap.
-      ui_->displayed_frame_sequence.erase(selected_session->remote_id_);
-      if (mac_metal_video_renderer_->SetSelectedStream(
-              selected_session->remote_id_)) {
-        video_frame_dirty_.store(true, std::memory_order_release);
-      }
-      SubmitCachedFrameToMetal(selected_session);
-    }
-  } else {
-    // Keep the initial window opaque until winit has created its native
-    // NSWindow. Creating it transparent opts into a full-size titlebar whose
-    // title field sits underneath the standard traffic-light buttons.
-    (*ui_->stream)->set_native_video_enabled(false);
-  }
-  return;
-#else
-  if (!ui_ || !ui_->stream) {
-    return;
-  }
-  const auto error = (*ui_->stream)->window().set_rendering_notifier(
-      [this](slint::RenderingState state, slint::GraphicsAPI graphics_api) {
-        if (!ui_ || graphics_api != slint::GraphicsAPI::NativeOpenGL) {
-          return;
-        }
 
-        std::lock_guard lock(ui_->video_gl_mutex);
-        if (state == slint::RenderingState::RenderingSetup) {
-          GLuint texture = 0;
-          glGenTextures(1, &texture);
-          if (texture == 0) {
-            return;
-          }
-          GLint previous_texture = 0;
-          glGetIntegerv(GL_TEXTURE_BINDING_2D, &previous_texture);
-          glBindTexture(GL_TEXTURE_2D, texture);
-          glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
-          glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-          glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, kGlClampToEdge);
-          glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, kGlClampToEdge);
-          glBindTexture(GL_TEXTURE_2D,
-                        static_cast<GLuint>(previous_texture));
-          ui_->video_gl_texture = texture;
-#if defined(_WIN32)
-          if (windows_opengl_video_renderer_ &&
-              windows_opengl_video_renderer_->Setup()) {
-            windows_opengl_video_renderer_->SetSelectedStream(
-                focused_remote_id_);
-            video_frame_dirty_.store(true, std::memory_order_release);
-          }
-#endif
-          return;
+  ui_->video_presenter->PrepareWindow(
+      *ui_->stream,
+      [this] {
+        SlintVideoPresenter::SurfaceState state;
+        state.selected_stream = focused_remote_id_;
+        state.fullscreen = fullscreen_button_pressed_;
+        if (ui_) {
+          state.tab_count = ui_->tab_ids.size();
         }
-
-#if defined(_WIN32)
-        if (state == slint::RenderingState::BeforeRendering &&
-            windows_opengl_video_renderer_ &&
-            windows_opengl_video_renderer_->IsReady() && ui_->stream &&
-            (*ui_->stream)->get_native_video_enabled()) {
-          const auto window_size = (*ui_->stream)->window().size();
-          const float scale_factor =
-              std::max(1.0f, (*ui_->stream)->window().scale_factor());
-          const int top_inset =
-              !fullscreen_button_pressed_ && ui_->tab_ids.size() > 1
-                  ? static_cast<int>(std::lround(30.0f * scale_factor))
-                  : 0;
-          windows_opengl_video_renderer_->RenderLatest(
-              focused_remote_id_, static_cast<int>(window_size.width),
-              static_cast<int>(window_size.height), top_inset);
-          return;
-        }
-#endif
-
-        if (state == slint::RenderingState::BeforeRendering &&
-            ui_->video_gl_texture != 0 && ui_->video_gl_pending_dirty &&
-            !ui_->video_gl_pending_frame.empty()) {
-          GLint previous_texture = 0;
-          GLint previous_unpack_alignment = 0;
-          glGetIntegerv(GL_TEXTURE_BINDING_2D, &previous_texture);
-          glGetIntegerv(GL_UNPACK_ALIGNMENT, &previous_unpack_alignment);
-          glBindTexture(GL_TEXTURE_2D, ui_->video_gl_texture);
-          glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
-          if (ui_->video_gl_texture_size != ui_->video_gl_pending_size) {
-            glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
-                         ui_->video_gl_pending_size.width,
-                         ui_->video_gl_pending_size.height, 0, GL_RGBA,
-                         GL_UNSIGNED_BYTE, ui_->video_gl_pending_frame.data());
-            ui_->video_gl_texture_size = ui_->video_gl_pending_size;
-          } else {
-            glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0,
-                            ui_->video_gl_pending_size.width,
-                            ui_->video_gl_pending_size.height, GL_RGBA,
-                            GL_UNSIGNED_BYTE,
-                            ui_->video_gl_pending_frame.data());
-          }
-          glPixelStorei(GL_UNPACK_ALIGNMENT, previous_unpack_alignment);
-          glBindTexture(GL_TEXTURE_2D,
-                        static_cast<GLuint>(previous_texture));
-          ui_->video_gl_pending_dirty = false;
-          return;
-        }
-
-        if (state == slint::RenderingState::RenderingTeardown) {
-#if defined(_WIN32)
-          if (windows_opengl_video_renderer_) {
-            windows_opengl_video_renderer_->Teardown();
-          }
-#endif
-          if (ui_->video_gl_texture != 0) {
-            const GLuint texture = ui_->video_gl_texture;
-            glDeleteTextures(1, &texture);
-          }
-          ui_->video_gl_texture = 0;
-          ui_->video_gl_texture_size = {};
-          ui_->video_gl_image_size = {};
-          ui_->video_gl_pending_size = {};
-          ui_->video_gl_pending_dirty = false;
-          ui_->video_gl_pending_frame.clear();
-        }
-      });
-  if (error.has_value()) {
-    LOG_WARN("Slint OpenGL video renderer unavailable, using pixel buffers");
-#if defined(_WIN32)
-  } else if (windows_opengl_video_renderer_) {
-    windows_opengl_video_renderer_->SetSelectedStream(focused_remote_id_);
-#endif
-  }
-#endif
+        return state;
+      },
+      [this] { video_frame_dirty_.store(true, std::memory_order_release); });
 }
 
-#if defined(_WIN32)
-void GuiApplication::SubmitCachedFrameToOpenGl(
-    const std::shared_ptr<RemoteSession>& session) {
-  if (!session || !windows_opengl_video_renderer_ ||
-      !windows_opengl_video_renderer_->IsReady() ||
-      session->connection_status_.load() != ConnectionStatus::Connected) {
-    return;
-  }
-
-  std::shared_ptr<std::vector<unsigned char>> cached_frame;
-  int cached_width = 0;
-  int cached_height = 0;
-  {
-    std::lock_guard lock(session->video_frame_mutex_);
-    if (session->front_frame_ && !session->front_frame_->empty()) {
-      cached_frame = session->front_frame_;
-      cached_width = session->video_width_;
-      cached_height = session->video_height_;
-    } else if (session->thumbnail_frame_ &&
-               !session->thumbnail_frame_->empty()) {
-      cached_frame = session->thumbnail_frame_;
-      cached_width = session->thumbnail_width_;
-      cached_height = session->thumbnail_height_;
-    }
-  }
-
-  if (cached_frame && cached_width > 0 && cached_height > 0 &&
-      windows_opengl_video_renderer_->SubmitCachedNv12(
-          session->remote_id_, cached_frame->data(), cached_frame->size(),
-          cached_width, cached_height) ==
-          WindowsOpenGlVideoRenderer::SubmitResult::submitted) {
-    video_frame_dirty_.store(true, std::memory_order_release);
-  }
-}
-#endif
-
-#if defined(__APPLE__)
-void GuiApplication::SubmitCachedFrameToMetal(
-    const std::shared_ptr<RemoteSession>& session) {
-  if (!session || !mac_metal_video_renderer_ ||
-      !mac_metal_video_renderer_->IsReady() ||
-      session->connection_status_.load() != ConnectionStatus::Connected) {
-    return;
-  }
-
-  std::shared_ptr<std::vector<unsigned char>> cached_frame;
-  int cached_width = 0;
-  int cached_height = 0;
-  {
-    std::lock_guard lock(session->video_frame_mutex_);
-    if (session->front_frame_ && !session->front_frame_->empty()) {
-      cached_frame = session->front_frame_;
-      cached_width = session->video_width_;
-      cached_height = session->video_height_;
-    } else if (session->thumbnail_frame_ &&
-               !session->thumbnail_frame_->empty()) {
-      cached_frame = session->thumbnail_frame_;
-      cached_width = session->thumbnail_width_;
-      cached_height = session->thumbnail_height_;
-    }
-  }
-
-  if (cached_frame && cached_width > 0 && cached_height > 0 &&
-      mac_metal_video_renderer_->SubmitCachedNv12(
-          session->remote_id_, cached_frame->data(), cached_frame->size(),
-          cached_width, cached_height) ==
-          MacMetalVideoRenderer::SubmitResult::submitted) {
-    video_frame_dirty_.store(true, std::memory_order_release);
-  }
-}
-#endif
-
 void GuiApplication::ScheduleNextVideoFrame() {
   if (!ui_) {
     return;
@@ -3028,28 +2628,19 @@ void GuiApplication::ScheduleNextVideoFrame() {
   if (now >= next_video_frame_time_) {
     const bool frame_dirty =
         video_frame_dirty_.exchange(false, std::memory_order_acq_rel);
-#if defined(__APPLE__)
-    const bool native_render_needed =
-        mac_metal_video_renderer_ && mac_metal_video_renderer_->IsReady() &&
-        mac_metal_video_renderer_->IsAttached() && ui_->stream &&
-        mac_metal_video_renderer_->NeedsSurfaceRedraw();
+    const bool native_render_needed = ui_->stream && ui_->video_presenter &&
+                                      ui_->video_presenter->NeedsRedraw();
     if (frame_dirty || native_render_needed) {
       SyncStreamVideoFrame();
     }
-#else
-    if (frame_dirty) {
-      SyncStreamVideoFrame();
-    }
-#endif
     do {
       next_video_frame_time_ += frame_interval;
     } while (next_video_frame_time_ <= now);
   }
 
   const auto after_render = std::chrono::steady_clock::now();
-  const auto remaining =
-      std::max(next_video_frame_time_ - after_render,
-               std::chrono::steady_clock::duration::zero());
+  const auto remaining = std::max(next_video_frame_time_ - after_render,
+                                  std::chrono::steady_clock::duration::zero());
   const auto delay_ns =
       std::chrono::duration_cast<std::chrono::nanoseconds>(remaining).count();
   const auto delay_ms = std::max<int64_t>(1, (delay_ns + 999'999) / 1'000'000);
@@ -3235,7 +2826,6 @@ void GuiApplication::SaveSettingsFromUi() {
   enable_self_hosted_ = main->get_self_hosted_enabled();
   enable_autostart_ = main->get_autostart_enabled();
   enable_daemon_ = main->get_daemon_enabled();
-  enable_minimize_to_tray_ = main->get_minimize_to_tray_enabled();
 
   localization_language_ =
       static_cast<ConfigCenter::LANGUAGE>(language_button_value_);
@@ -3254,7 +2844,6 @@ void GuiApplication::SaveSettingsFromUi() {
   config_center_->SetSelfHosted(enable_self_hosted_);
   config_center_->SetAutostart(enable_autostart_);
   config_center_->SetDaemon(enable_daemon_);
-  config_center_->SetMinimizeToTray(enable_minimize_to_tray_);
 
   const std::string path(main->get_file_save_path());
   std::memset(file_transfer_save_path_buf_, 0,
@@ -3284,7 +2873,6 @@ void GuiApplication::SaveSettingsFromUi() {
   enable_self_hosted_last_ = enable_self_hosted_;
   enable_autostart_last_ = enable_autostart_;
   enable_daemon_last_ = enable_daemon_;
-  enable_minimize_to_tray_last_ = enable_minimize_to_tray_;
   file_transfer_save_path_last_ = path;
   ui_->localized_language = -1;
 
@@ -3321,20 +2909,17 @@ void GuiApplication::SelectStreamTab(int index) {
     return;
   }
   const std::string selected_remote_id = ui_->tab_ids[index];
-#if defined(__APPLE__) || defined(_WIN32)
   const bool selection_changed = focused_remote_id_ != selected_remote_id;
   bool renderer_selection_changed = false;
-#endif
   if (!controlled_remote_id_.empty() &&
       controlled_remote_id_ != selected_remote_id) {
     keyboard_.ForceReleasePressedKeys();
   }
   focused_remote_id_ = selected_remote_id;
   controlled_remote_id_ = selected_remote_id;
-#if defined(_WIN32)
-  if (windows_opengl_video_renderer_) {
+  if (ui_->video_presenter) {
     renderer_selection_changed =
-        windows_opengl_video_renderer_->SetSelectedStream(selected_remote_id);
+        ui_->video_presenter->SelectStream(selected_remote_id);
   }
   if (renderer_selection_changed) {
     video_frame_dirty_.store(true, std::memory_order_release);
@@ -3342,18 +2927,6 @@ void GuiApplication::SelectStreamTab(int index) {
   if (selection_changed && ui_->stream) {
     (*ui_->stream)->set_has_frame(false);
   }
-#elif defined(__APPLE__)
-  if (mac_metal_video_renderer_) {
-    renderer_selection_changed =
-        mac_metal_video_renderer_->SetSelectedStream(selected_remote_id);
-  }
-  if (renderer_selection_changed) {
-    video_frame_dirty_.store(true, std::memory_order_release);
-  }
-  if (selection_changed && ui_->stream) {
-    (*ui_->stream)->set_has_frame(false);
-  }
-#endif
   std::shared_ptr<RemoteSession> selected_session;
   {
     std::shared_lock lock(remote_sessions_mutex_);
@@ -3366,20 +2939,11 @@ void GuiApplication::SelectStreamTab(int index) {
     if (selected != remote_sessions_.end()) {
       selected_session = selected->second;
     }
-    start_keyboard_capturer_ =
-        selected_session && selected_session->control_mouse_ &&
-        selected_session->connection_status_.load() ==
-            ConnectionStatus::Connected;
+    start_keyboard_capturer_ = selected_session &&
+                               selected_session->control_mouse_ &&
+                               selected_session->connection_status_.load() ==
+                                   ConnectionStatus::Connected;
   }
-#if defined(_WIN32)
-  if (renderer_selection_changed) {
-    SubmitCachedFrameToOpenGl(selected_session);
-  }
-#elif defined(__APPLE__)
-  if (renderer_selection_changed) {
-    SubmitCachedFrameToMetal(selected_session);
-  }
-#endif
 }
 
 void GuiApplication::ReorderStreamTab(int from, float drop_x, float tab_width) {
@@ -3423,21 +2987,15 @@ void GuiApplication::CloseStreamTab(const std::string& remote_id) {
     std::unique_lock lock(remote_sessions_mutex_);
     remote_sessions_.erase(remote_id);
   }
-  ui_->displayed_frame_sequence.erase(remote_id);
+  if (ui_->video_presenter) {
+    ui_->video_presenter->ForgetStream(remote_id);
+  }
   if (focused_remote_id_ == remote_id) {
     focused_remote_id_.clear();
     controlled_remote_id_.clear();
-#if defined(_WIN32)
-    if (windows_opengl_video_renderer_ &&
-        windows_opengl_video_renderer_->SetSelectedStream({})) {
+    if (ui_->video_presenter && ui_->video_presenter->SelectStream({})) {
       video_frame_dirty_.store(true, std::memory_order_release);
     }
-#elif defined(__APPLE__)
-    if (mac_metal_video_renderer_ &&
-        mac_metal_video_renderer_->SetSelectedStream({})) {
-      video_frame_dirty_.store(true, std::memory_order_release);
-    }
-#endif
   }
 }
 
@@ -3631,20 +3189,14 @@ void GuiApplication::Cleanup() {
   WaitForThumbnailSaveTasks();
   devices_.DestroyAudioOutput();
   if (ui_->stream) {
-#if defined(_WIN32)
-    if (windows_opengl_video_renderer_) {
-      windows_opengl_video_renderer_->SetSelectedStream({});
-    }
-#endif
 #if defined(__APPLE__)
     void* stream_view = (*ui_->stream)->window().appkit_view();
     SetStreamWindowFullscreen(false);
     UnregisterStreamWindow(stream_view);
-    if (mac_metal_video_renderer_) {
-      mac_metal_video_renderer_->SetSelectedStream({});
-      mac_metal_video_renderer_->Detach();
-    }
 #endif
+    if (ui_->video_presenter) {
+      ui_->video_presenter->Detach();
+    }
     (*ui_->stream)->hide();
     ui_->stream.reset();
   }

src/gui/application/gui_application.h

@@ -5,6 +5,7 @@
 #include <memory>
 #include <string>
 
+#include "runtime/cursor_state_provider.h"
 #include "runtime/gui_runtime.h"
 
 namespace crossdesk {
@@ -32,6 +33,7 @@ private:
   void BindStreamCallbacks();
   void BindServerCallbacks();
   void Tick();
+  void ShareLocalCursorState();
   void HandlePasswordChangeResult();
   void HandleCredentialRecovery();
   void SyncMainWindow();
@@ -41,14 +43,6 @@ private:
   void SyncStreamVideoFrame();
   void ScheduleNextVideoFrame();
   void ConfigureStreamVideoRenderer();
-#if defined(_WIN32)
-  void SubmitCachedFrameToOpenGl(
-      const std::shared_ptr<RemoteSession>& session);
-#endif
-#if defined(__APPLE__)
-  void SubmitCachedFrameToMetal(
-      const std::shared_ptr<RemoteSession>& session);
-#endif
   void SyncStreamKeyboardFocus();
   void SetStreamKeyboardFocus(bool focused);
   void SyncServerWindow();
@@ -78,6 +72,11 @@ private:
   bool OpenUrl(const std::string &url);
 
   std::unique_ptr<SlintUi> ui_;
+  CursorStateProvider cursor_state_provider_;
+  CursorState last_shared_cursor_state_{};
+  bool has_shared_cursor_state_ = false;
+  uint32_t cursor_state_sequence_ = 0;
+  std::chrono::steady_clock::time_point last_cursor_state_share_time_{};
   std::chrono::steady_clock::time_point next_video_frame_time_{};
 #if defined(__linux__) && !defined(__APPLE__)
   bool use_xwayland_gui_ = false;

src/gui/application/sdl_event_dispatch.cpp

@@ -134,8 +134,10 @@ void GuiApplication::ProcessSdlEvent(const SDL_Event &event) {
     }
 
     if (main_window_ &&
-        event.window.windowID == SDL_GetWindowID(main_window_) &&
-        MinimizeMainWindowToTray()) {
+        event.window.windowID == SDL_GetWindowID(main_window_)) {
+      if (!MinimizeMainWindowToTray()) {
+        SDL_HideWindow(main_window_);
+      }
       break;
     }
 

src/gui/application/window_rendering.cpp

@@ -150,7 +150,7 @@ int GuiApplication::DrawServerWindow() {
 }
 
 bool GuiApplication::MinimizeMainWindowToTray() {
-  if (!enable_minimize_to_tray_ || !main_window_) {
+  if (!main_window_) {
     return false;
   }
 

src/gui/assets/localization/localization.h

@@ -135,35 +135,58 @@ inline std::string FormatDisplayLabel(size_t display_index,
 CROSSDESK_LOCALIZATION_ALL(CROSSDESK_DECLARE_LOCALIZED_STRING)
 #undef CROSSDESK_DECLARE_LOCALIZED_STRING
 
-#if _WIN32
-inline const wchar_t* GetExitProgramLabel(int language_index) {
-  static std::vector<std::wstring> cache(GetSupportedLanguages().size());
+#if _WIN32
+inline const wchar_t* GetWindowsLocalizedLabel(
+    int language_index, const char* key, const wchar_t* fallback,
+    std::vector<std::wstring>& cache) {
   const int normalized_index = detail::ClampLanguageIndex(language_index);
-  std::wstring& cached_text = cache[normalized_index];
-  if (!cached_text.empty()) {
-    return cached_text.c_str();
-  }
-
-  const std::string& utf8_text =
-      detail::GetTranslatedText("exit_program", normalized_index);
-  if (utf8_text.empty()) {
-    cached_text = L"Exit";
-    return cached_text.c_str();
-  }
-
-  int wide_length =
-      MultiByteToWideChar(CP_UTF8, 0, utf8_text.c_str(), -1, nullptr, 0);
-  if (wide_length <= 0) {
-    cached_text = L"Exit";
-    return cached_text.c_str();
-  }
-
-  cached_text.resize(static_cast<size_t>(wide_length - 1));
-  MultiByteToWideChar(CP_UTF8, 0, utf8_text.c_str(), -1, cached_text.data(),
-                      wide_length);
-  return cached_text.c_str();
-}
-#endif
+  std::wstring& cached_text = cache[normalized_index];
+  if (!cached_text.empty()) {
+    return cached_text.c_str();
+  }
+
+  const std::string& utf8_text =
+      detail::GetTranslatedText(key, normalized_index);
+  if (utf8_text.empty()) {
+    cached_text = fallback;
+    return cached_text.c_str();
+  }
+
+  int wide_length =
+      MultiByteToWideChar(CP_UTF8, 0, utf8_text.c_str(), -1, nullptr, 0);
+  if (wide_length <= 0) {
+    cached_text = fallback;
+    return cached_text.c_str();
+  }
+
+  cached_text.resize(static_cast<size_t>(wide_length));
+  if (MultiByteToWideChar(CP_UTF8, 0, utf8_text.c_str(), -1,
+                          cached_text.data(), wide_length) <= 0) {
+    cached_text = fallback;
+    return cached_text.c_str();
+  }
+  cached_text.pop_back();
+  return cached_text.c_str();
+}
+
+inline const wchar_t* GetShowMainWindowLabel(int language_index) {
+  static std::vector<std::wstring> cache(GetSupportedLanguages().size());
+  return GetWindowsLocalizedLabel(language_index, "show_main_window",
+                                  L"Show Main Window", cache);
+}
+
+inline const wchar_t* GetSettingsLabel(int language_index) {
+  static std::vector<std::wstring> cache(GetSupportedLanguages().size());
+  return GetWindowsLocalizedLabel(language_index, "settings", L"Settings",
+                                  cache);
+}
+
+inline const wchar_t* GetExitProgramLabel(int language_index) {
+  static std::vector<std::wstring> cache(GetSupportedLanguages().size());
+  return GetWindowsLocalizedLabel(language_index, "exit_program", L"Exit",
+                                  cache);
+}
+#endif
 
 }  // namespace localization
 }  // namespace crossdesk

src/gui/assets/localization/localization_data.h

@@ -215,8 +215,6 @@ struct TranslationRow {
   X(file_transfer_save_path, u8"文件接收保存路径:",                            \
     "File Transfer Save Path:", u8"Путь сохранения файлов:")                   \
   X(default_desktop, u8"桌面", "Desktop", u8"Рабочий стол")                    \
-  X(minimize_to_tray, u8"退出时最小化到系统托盘:",                             \
-    "Minimize on Exit:", u8"Сворачивать в трей при выходе:")                   \
   X(resolution, u8"分辨率", "Res", u8"Разрешение")                             \
   X(connection_mode, u8"连接模式", "Mode", u8"Режим")                          \
   X(connection_mode_direct, u8"直连", "Direct", u8"Прямой")                    \
@@ -233,6 +231,8 @@ struct TranslationRow {
   X(permission_required_message, u8"该应用需要授权以下权限:",                  \
     "The application requires the following permissions:",                     \
     u8"Для работы приложения требуются следующие разрешения:")                 \
+  X(show_main_window, u8"显示主界面", "Show Main Window",                    \
+    u8"Показать главное окно")                                                \
   X(exit_program, u8"退出", "Exit", u8"Выход")
 
 inline constexpr TranslationRow kTranslationRows[] = {

src/gui/features/settings/settings_manager.cpp

@@ -310,7 +310,6 @@ int SettingsManager::Load() {
   owner_.enable_self_hosted_ = owner_.config_center_->IsSelfHosted();
   owner_.enable_autostart_ = owner_.config_center_->IsEnableAutostart();
   owner_.enable_daemon_ = owner_.config_center_->IsEnableDaemon();
-  owner_.enable_minimize_to_tray_ = owner_.config_center_->IsMinimizeToTray();
 #if _WIN32 && CROSSDESK_PORTABLE
   owner_.portable_service_prompt_suppressed_ =
       owner_.config_center_->IsPortableServicePromptSuppressed();
@@ -333,7 +332,6 @@ int SettingsManager::Load() {
   owner_.enable_srtp_last_ = owner_.enable_srtp_;
   owner_.enable_self_hosted_last_ = owner_.enable_self_hosted_;
   owner_.enable_autostart_last_ = owner_.enable_autostart_;
-  owner_.enable_minimize_to_tray_last_ = owner_.enable_minimize_to_tray_;
 
   LOG_INFO("Load settings from cache file");
   return 0;

src/gui/platform/metal_video_renderer.h

@@ -8,6 +8,8 @@
 #include <string_view>
 #include <vector>
 
+#include "platform/video_renderer.h"
+
 namespace crossdesk {
 
 // macOS video compositor used by CrossDesk only. MiniRTC continues to expose
@@ -15,51 +17,31 @@ namespace crossdesk {
 // copy into shared Metal buffers and converts NV12 to RGB in the fragment
 // shader. AppKit attachment and rendering are main-thread operations, while
 // SubmitNv12() is safe to call from MiniRTC's decode callback thread.
-class MacMetalVideoRenderer {
+class MacMetalVideoRenderer final : public VideoRenderer {
  public:
-  enum class SubmitResult {
-    submitted,
-    not_selected,
-    dropped,
-    failed,
-  };
-
-  enum class RenderResult {
-    rendered,
-    idle,
-    empty,
-    failed,
-  };
-
-  struct RenderOutcome {
-    RenderResult result = RenderResult::failed;
-    int width = 0;
-    int height = 0;
-    uint64_t sequence = 0;
-  };
-
   MacMetalVideoRenderer();
-  ~MacMetalVideoRenderer();
+  ~MacMetalVideoRenderer() override;
 
   MacMetalVideoRenderer(const MacMetalVideoRenderer&) = delete;
   MacMetalVideoRenderer& operator=(const MacMetalVideoRenderer&) = delete;
 
-  bool IsReady() const;
+  bool IsReady() const override;
+  bool IsActive() const override;
 
   // The selected stream is the only stream uploaded. Frames for background
   // tabs are intentionally dropped to avoid wasting memory bandwidth.
-  bool SetSelectedStream(std::string remote_id);
-  void DiscardStream(std::string_view remote_id);
+  bool SetSelectedStream(std::string remote_id) override;
+  void DiscardStream(std::string_view remote_id) override;
 
   // Copies one tightly packed NV12 frame into a free shared Metal slot.
   SubmitResult SubmitNv12(std::string_view remote_id, const uint8_t* data,
-                          size_t size, int width, int height);
+                          size_t size, int width, int height) override;
 
   // Seeds a newly selected stream from its retained CPU snapshot without
   // replacing a newer decoded frame that is already queued or rendering.
   SubmitResult SubmitCachedNv12(std::string_view remote_id,
                                 const uint8_t* data, size_t size, int width,
-                                int height);
+                                int height) override;
 
   // Attaches a native CAMetalLayer-backed sibling below Slint's NSView and
   // restores the containing AppKit window's ordinary opaque titlebar.
@@ -84,7 +66,7 @@ class MacMetalVideoRenderer {
   // a second per-frame CPU copy during normal playback.
   bool CopyLatestNv12(std::string_view remote_id,
                       std::vector<unsigned char>* output, int* width,
-                      int* height) const;
+                      int* height) const override;
 
  private:
   SubmitResult SubmitNv12Internal(std::string_view remote_id,

src/gui/platform/metal_video_renderer.mm

@@ -602,6 +602,10 @@ bool MacMetalVideoRenderer::IsReady() const {
   return impl_ && impl_->Ready();
 }
 
+bool MacMetalVideoRenderer::IsActive() const {
+  return IsReady() && IsAttached();
+}
+
 bool MacMetalVideoRenderer::SetSelectedStream(std::string remote_id) {
   if (!impl_) {
     return false;

src/gui/platform/opengl_video_renderer.cpp

@@ -1,13 +1,20 @@
-#include "platform/windows_opengl_video_renderer.h"
+#include "platform/opengl_video_renderer.h"
 
-#if !defined(_WIN32)
-#error "WindowsOpenGlVideoRenderer is only available on Windows"
+#if !defined(_WIN32) && !defined(__linux__)
+#error "OpenGlVideoRenderer is only available on Windows and Linux"
 #endif
 
+#if defined(_WIN32)
 #include <windows.h>
+#elif defined(__linux__)
+#include <dlfcn.h>
+#endif
 
 #include <GL/gl.h>
 #include <GL/glext.h>
+#if defined(__linux__)
+#include <GL/glx.h>
+#endif
 
 #include <algorithm>
 #include <array>
@@ -49,6 +56,7 @@ struct SharedFrameState {
 };
 
 template <typename T> bool LoadOpenGlFunction(T *function, const char *name) {
+#if defined(_WIN32)
   PROC address = wglGetProcAddress(name);
   if (address == nullptr || address == reinterpret_cast<PROC>(1) ||
       address == reinterpret_cast<PROC>(2) ||
@@ -58,6 +66,14 @@ template <typename T> bool LoadOpenGlFunction(T *function, const char *name) {
     address = module ? GetProcAddress(module, name) : nullptr;
   }
   *function = reinterpret_cast<T>(address);
+#elif defined(__linux__)
+  void *address = dlsym(RTLD_DEFAULT, name);
+  if (address == nullptr) {
+    address = reinterpret_cast<void *>(
+        glXGetProcAddressARB(reinterpret_cast<const GLubyte *>(name)));
+  }
+  *function = reinterpret_cast<T>(address);
+#endif
   return *function != nullptr;
 }
 
@@ -85,7 +101,10 @@ struct OpenGlFunctions {
   PFNGLGETVERTEXATTRIBPOINTERVPROC get_vertex_attrib_pointer_v = nullptr;
   PFNGLLINKPROGRAMPROC link_program = nullptr;
   PFNGLSHADERSOURCEPROC shader_source = nullptr;
+  PFNGLUNIFORM1FPROC uniform_1f = nullptr;
   PFNGLUNIFORM1IPROC uniform_1i = nullptr;
+  PFNGLUNIFORM2FPROC uniform_2f = nullptr;
+  PFNGLUNIFORM4FPROC uniform_4f = nullptr;
   PFNGLUSEPROGRAMPROC use_program = nullptr;
   PFNGLVERTEXATTRIBPOINTERPROC vertex_attrib_pointer = nullptr;
 
@@ -116,7 +135,10 @@ struct OpenGlFunctions {
                               "glGetVertexAttribPointerv") &&
            LoadOpenGlFunction(&link_program, "glLinkProgram") &&
            LoadOpenGlFunction(&shader_source, "glShaderSource") &&
+           LoadOpenGlFunction(&uniform_1f, "glUniform1f") &&
            LoadOpenGlFunction(&uniform_1i, "glUniform1i") &&
+           LoadOpenGlFunction(&uniform_2f, "glUniform2f") &&
+           LoadOpenGlFunction(&uniform_4f, "glUniform4f") &&
            LoadOpenGlFunction(&use_program, "glUseProgram") &&
            LoadOpenGlFunction(&vertex_attrib_pointer, "glVertexAttribPointer");
   }
@@ -205,7 +227,7 @@ void RestoreVertexAttrib(const OpenGlFunctions &gl, GLuint index,
 
 } // namespace
 
-struct WindowsOpenGlVideoRenderer::Impl {
+struct OpenGlVideoRenderer::Impl {
   OpenGlFunctions gl;
   std::shared_ptr<SharedFrameState> frames =
       std::make_shared<SharedFrameState>();
@@ -218,6 +240,10 @@ struct WindowsOpenGlVideoRenderer::Impl {
   GLint texcoord_location = -1;
   GLint y_texture_location = -1;
   GLint uv_texture_location = -1;
+  GLint target_size_location = -1;
+  GLint video_rect_location = -1;
+  GLint corner_radius_location = -1;
+  GLint video_enabled_location = -1;
   int texture_width = 0;
   int texture_height = 0;
   std::string uploaded_stream;
@@ -232,6 +258,10 @@ struct WindowsOpenGlVideoRenderer::Impl {
     texcoord_location = -1;
     y_texture_location = -1;
     uv_texture_location = -1;
+    target_size_location = -1;
+    video_rect_location = -1;
+    corner_radius_location = -1;
+    video_enabled_location = -1;
     texture_width = 0;
     texture_height = 0;
     uploaded_stream.clear();
@@ -239,12 +269,12 @@ struct WindowsOpenGlVideoRenderer::Impl {
   }
 };
 
-WindowsOpenGlVideoRenderer::WindowsOpenGlVideoRenderer()
+OpenGlVideoRenderer::OpenGlVideoRenderer()
     : impl_(std::make_unique<Impl>()) {}
 
-WindowsOpenGlVideoRenderer::~WindowsOpenGlVideoRenderer() = default;
+OpenGlVideoRenderer::~OpenGlVideoRenderer() = default;
 
-bool WindowsOpenGlVideoRenderer::Setup() {
+bool OpenGlVideoRenderer::Setup() {
   if (IsReady()) {
     return true;
   }
@@ -274,15 +304,41 @@ precision mediump float;
 #endif
 uniform sampler2D y_texture;
 uniform sampler2D uv_texture;
+uniform vec2 target_size;
+uniform vec4 video_rect;
+uniform float corner_radius;
+uniform float video_enabled;
 varying vec2 video_texcoord;
 void main() {
-  float y = 1.16438356 *
-            (texture2D(y_texture, video_texcoord).r - 16.0 / 255.0);
-  vec2 uv = texture2D(uv_texture, video_texcoord).ra - vec2(0.5, 0.5);
-  vec3 rgb = vec3(y + 1.59602678 * uv.y,
-                  y - 0.39176229 * uv.x - 0.81296764 * uv.y,
-                  y + 2.01723214 * uv.x);
-  gl_FragColor = vec4(clamp(rgb, 0.0, 1.0), 1.0);
+  vec2 surface_point = video_texcoord * target_size;
+  vec3 rgb = vec3(0.0);
+  if (video_enabled > 0.5 &&
+      surface_point.x >= video_rect.x &&
+      surface_point.x <= video_rect.x + video_rect.z &&
+      surface_point.y >= video_rect.y &&
+      surface_point.y <= video_rect.y + video_rect.w) {
+    vec2 frame_texcoord =
+        (surface_point - video_rect.xy) / video_rect.zw;
+    float y = 1.16438356 *
+              (texture2D(y_texture, frame_texcoord).r - 16.0 / 255.0);
+    vec2 uv =
+        texture2D(uv_texture, frame_texcoord).ra - vec2(0.5, 0.5);
+    rgb = clamp(vec3(y + 1.59602678 * uv.y,
+                     y - 0.39176229 * uv.x - 0.81296764 * uv.y,
+                     y + 2.01723214 * uv.x),
+                0.0, 1.0);
+  }
+  float coverage = 1.0;
+  if (corner_radius > 0.0) {
+    vec2 half_size = target_size * 0.5;
+    vec2 corner = abs(surface_point - half_size) -
+                  (half_size - vec2(corner_radius));
+    float distance_to_edge =
+        length(max(corner, vec2(0.0))) +
+        min(max(corner.x, corner.y), 0.0) - corner_radius;
+    coverage = clamp(0.5 - distance_to_edge, 0.0, 1.0);
+  }
+  gl_FragColor = vec4(rgb * coverage, coverage);
 }
 )glsl";
   static constexpr char kDesktopVertexShader[] = R"glsl(
@@ -299,15 +355,41 @@ void main() {
 #version 110
 uniform sampler2D y_texture;
 uniform sampler2D uv_texture;
+uniform vec2 target_size;
+uniform vec4 video_rect;
+uniform float corner_radius;
+uniform float video_enabled;
 varying vec2 video_texcoord;
 void main() {
-  float y = 1.16438356 *
-            (texture2D(y_texture, video_texcoord).r - 16.0 / 255.0);
-  vec2 uv = texture2D(uv_texture, video_texcoord).ra - vec2(0.5, 0.5);
-  vec3 rgb = vec3(y + 1.59602678 * uv.y,
-                  y - 0.39176229 * uv.x - 0.81296764 * uv.y,
-                  y + 2.01723214 * uv.x);
-  gl_FragColor = vec4(clamp(rgb, 0.0, 1.0), 1.0);
+  vec2 surface_point = video_texcoord * target_size;
+  vec3 rgb = vec3(0.0);
+  if (video_enabled > 0.5 &&
+      surface_point.x >= video_rect.x &&
+      surface_point.x <= video_rect.x + video_rect.z &&
+      surface_point.y >= video_rect.y &&
+      surface_point.y <= video_rect.y + video_rect.w) {
+    vec2 frame_texcoord =
+        (surface_point - video_rect.xy) / video_rect.zw;
+    float y = 1.16438356 *
+              (texture2D(y_texture, frame_texcoord).r - 16.0 / 255.0);
+    vec2 uv =
+        texture2D(uv_texture, frame_texcoord).ra - vec2(0.5, 0.5);
+    rgb = clamp(vec3(y + 1.59602678 * uv.y,
+                     y - 0.39176229 * uv.x - 0.81296764 * uv.y,
+                     y + 2.01723214 * uv.x),
+                0.0, 1.0);
+  }
+  float coverage = 1.0;
+  if (corner_radius > 0.0) {
+    vec2 half_size = target_size * 0.5;
+    vec2 corner = abs(surface_point - half_size) -
+                  (half_size - vec2(corner_radius));
+    float distance_to_edge =
+        length(max(corner, vec2(0.0))) +
+        min(max(corner.x, corner.y), 0.0) - corner_radius;
+    coverage = clamp(0.5 - distance_to_edge, 0.0, 1.0);
+  }
+  gl_FragColor = vec4(rgb * coverage, coverage);
 }
 )glsl";
 
@@ -363,8 +445,19 @@ void main() {
       impl_->gl.get_uniform_location(impl_->program, "y_texture");
   impl_->uv_texture_location =
       impl_->gl.get_uniform_location(impl_->program, "uv_texture");
+  impl_->target_size_location =
+      impl_->gl.get_uniform_location(impl_->program, "target_size");
+  impl_->video_rect_location =
+      impl_->gl.get_uniform_location(impl_->program, "video_rect");
+  impl_->corner_radius_location =
+      impl_->gl.get_uniform_location(impl_->program, "corner_radius");
+  impl_->video_enabled_location =
+      impl_->gl.get_uniform_location(impl_->program, "video_enabled");
   if (impl_->position_location < 0 || impl_->texcoord_location < 0 ||
-      impl_->y_texture_location < 0 || impl_->uv_texture_location < 0) {
+      impl_->y_texture_location < 0 || impl_->uv_texture_location < 0 ||
+      impl_->target_size_location < 0 || impl_->video_rect_location < 0 ||
+      impl_->corner_radius_location < 0 ||
+      impl_->video_enabled_location < 0) {
     LOG_ERROR("OpenGL NV12 program is missing required shader bindings");
     impl_->gl.delete_program(impl_->program);
     impl_->ResetGlHandles();
@@ -429,7 +522,7 @@ void main() {
   return true;
 }
 
-void WindowsOpenGlVideoRenderer::Teardown() {
+void OpenGlVideoRenderer::Teardown() {
   impl_->ready.store(false, std::memory_order_release);
   if (impl_->y_texture != 0)
     glDeleteTextures(1, &impl_->y_texture);
@@ -444,11 +537,13 @@ void WindowsOpenGlVideoRenderer::Teardown() {
   impl_->ResetGlHandles();
 }
 
-bool WindowsOpenGlVideoRenderer::IsReady() const {
+bool OpenGlVideoRenderer::IsReady() const {
   return impl_->ready.load(std::memory_order_acquire);
 }
 
-bool WindowsOpenGlVideoRenderer::SetSelectedStream(std::string remote_id) {
+bool OpenGlVideoRenderer::IsActive() const { return IsReady(); }
+
+bool OpenGlVideoRenderer::SetSelectedStream(std::string remote_id) {
   std::lock_guard lock(impl_->frames->mutex);
   if (impl_->frames->selected_stream == remote_id) {
     return false;
@@ -463,7 +558,7 @@ bool WindowsOpenGlVideoRenderer::SetSelectedStream(std::string remote_id) {
   return true;
 }
 
-void WindowsOpenGlVideoRenderer::DiscardStream(std::string_view remote_id) {
+void OpenGlVideoRenderer::DiscardStream(std::string_view remote_id) {
   std::lock_guard lock(impl_->frames->mutex);
   for (auto &slot : impl_->frames->slots) {
     if (slot.remote_id == remote_id && slot.use != SlotUse::uploading) {
@@ -477,22 +572,22 @@ void WindowsOpenGlVideoRenderer::DiscardStream(std::string_view remote_id) {
   }
 }
 
-WindowsOpenGlVideoRenderer::SubmitResult
-WindowsOpenGlVideoRenderer::SubmitNv12(std::string_view remote_id,
+OpenGlVideoRenderer::SubmitResult
+OpenGlVideoRenderer::SubmitNv12(std::string_view remote_id,
                                        const uint8_t *data, size_t size,
                                        int width, int height) {
   return SubmitNv12Internal(remote_id, data, size, width, height, true);
 }
 
-WindowsOpenGlVideoRenderer::SubmitResult
-WindowsOpenGlVideoRenderer::SubmitCachedNv12(std::string_view remote_id,
+OpenGlVideoRenderer::SubmitResult
+OpenGlVideoRenderer::SubmitCachedNv12(std::string_view remote_id,
                                              const uint8_t *data, size_t size,
                                              int width, int height) {
   return SubmitNv12Internal(remote_id, data, size, width, height, false);
 }
 
-WindowsOpenGlVideoRenderer::SubmitResult
-WindowsOpenGlVideoRenderer::SubmitNv12Internal(std::string_view remote_id,
+OpenGlVideoRenderer::SubmitResult
+OpenGlVideoRenderer::SubmitNv12Internal(std::string_view remote_id,
                                                const uint8_t *data, size_t size,
                                                int width, int height,
                                                bool replace_pending) {
@@ -562,10 +657,11 @@ WindowsOpenGlVideoRenderer::SubmitNv12Internal(std::string_view remote_id,
   return SubmitResult::submitted;
 }
 
-WindowsOpenGlVideoRenderer::RenderOutcome
-WindowsOpenGlVideoRenderer::RenderLatest(std::string_view remote_id,
-                                         int target_width, int target_height,
-                                         int top_inset_pixels) {
+OpenGlVideoRenderer::RenderOutcome
+OpenGlVideoRenderer::RenderLatest(std::string_view remote_id,
+                                  int target_width, int target_height,
+                                  int top_inset_pixels,
+                                  int corner_radius_pixels) {
   if (!IsReady() || target_width <= 0 || target_height <= 0) {
     return {RenderResult::failed};
   }
@@ -643,7 +739,10 @@ WindowsOpenGlVideoRenderer::RenderLatest(std::string_view remote_id,
   glDisable(GL_STENCIL_TEST);
   glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
   glViewport(0, 0, target_width, target_height);
-  glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
+  // The Slint items above this underlay are transparent around the custom
+  // window corners. Keep those pixels transparent so the compositor can show
+  // the desktop instead of an opaque black framebuffer clear.
+  glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
   glClear(GL_COLOR_BUFFER_BIT);
 
   bool upload_succeeded = true;
@@ -696,60 +795,77 @@ WindowsOpenGlVideoRenderer::RenderLatest(std::string_view remote_id,
     }
   }
 
-  RenderOutcome outcome{RenderResult::empty};
-  if (upload_succeeded && impl_->uploaded_stream == remote_id &&
-      impl_->texture_width > 0 && impl_->texture_height > 0) {
+  const int content_y = std::clamp(top_inset_pixels, 0, target_height);
+  const int content_height = target_height - content_y;
+  const bool has_video =
+      upload_succeeded && impl_->uploaded_stream == remote_id &&
+      impl_->texture_width > 0 && impl_->texture_height > 0 &&
+      content_height > 0;
+  int video_x = 0;
+  int video_y = content_y;
+  int video_width = target_width;
+  int video_height = content_height;
+  if (has_video) {
     source_width = impl_->texture_width;
     source_height = impl_->texture_height;
     sequence = impl_->uploaded_sequence;
-    const int video_height = std::max(
-        0, target_height - std::clamp(top_inset_pixels, 0, target_height));
-    if (video_height > 0) {
-      const double source_aspect =
-          static_cast<double>(source_width) / source_height;
-      const double target_aspect =
-          static_cast<double>(target_width) / video_height;
-      int viewport_width = target_width;
-      int viewport_height = video_height;
-      int viewport_x = 0;
-      int viewport_y = 0;
-      if (source_aspect > target_aspect) {
-        viewport_height =
-            std::max(1, static_cast<int>(target_width / source_aspect + 0.5));
-        viewport_y = (video_height - viewport_height) / 2;
-      } else {
-        viewport_width =
-            std::max(1, static_cast<int>(video_height * source_aspect + 0.5));
-        viewport_x = (target_width - viewport_width) / 2;
-      }
-
-      glViewport(viewport_x, viewport_y, viewport_width, viewport_height);
-      impl_->gl.use_program(impl_->program);
-      impl_->gl.active_texture(GL_TEXTURE0);
-      glBindTexture(GL_TEXTURE_2D, impl_->y_texture);
-      impl_->gl.uniform_1i(impl_->y_texture_location, 0);
-      impl_->gl.active_texture(GL_TEXTURE1);
-      glBindTexture(GL_TEXTURE_2D, impl_->uv_texture);
-      impl_->gl.uniform_1i(impl_->uv_texture_location, 1);
-      impl_->gl.bind_buffer(GL_ARRAY_BUFFER, impl_->vertex_buffer);
-      impl_->gl.vertex_attrib_pointer(
-          static_cast<GLuint>(impl_->position_location), 2, GL_FLOAT, GL_FALSE,
-          4 * static_cast<GLsizei>(sizeof(GLfloat)), nullptr);
-      impl_->gl.vertex_attrib_pointer(
-          static_cast<GLuint>(impl_->texcoord_location), 2, GL_FLOAT, GL_FALSE,
-          4 * static_cast<GLsizei>(sizeof(GLfloat)),
-          reinterpret_cast<const void *>(2 * sizeof(GLfloat)));
-      impl_->gl.enable_vertex_attrib_array(
-          static_cast<GLuint>(impl_->position_location));
-      impl_->gl.enable_vertex_attrib_array(
-          static_cast<GLuint>(impl_->texcoord_location));
-      glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
-      outcome = {glGetError() == GL_NO_ERROR ? RenderResult::rendered
-                                             : RenderResult::failed,
-                 source_width, source_height, sequence};
+    const double source_aspect =
+        static_cast<double>(source_width) / source_height;
+    const double target_aspect =
+        static_cast<double>(target_width) / content_height;
+    if (source_aspect > target_aspect) {
+      video_height =
+          std::max(1, static_cast<int>(target_width / source_aspect + 0.5));
+      video_y = content_y + (content_height - video_height) / 2;
+    } else {
+      video_width =
+          std::max(1, static_cast<int>(content_height * source_aspect + 0.5));
+      video_x = (target_width - video_width) / 2;
     }
   }
 
+  while (glGetError() != GL_NO_ERROR) {
+  }
+  impl_->gl.use_program(impl_->program);
+  impl_->gl.active_texture(GL_TEXTURE0);
+  glBindTexture(GL_TEXTURE_2D, impl_->y_texture);
+  impl_->gl.uniform_1i(impl_->y_texture_location, 0);
+  impl_->gl.active_texture(GL_TEXTURE1);
+  glBindTexture(GL_TEXTURE_2D, impl_->uv_texture);
+  impl_->gl.uniform_1i(impl_->uv_texture_location, 1);
+  impl_->gl.uniform_2f(impl_->target_size_location,
+                       static_cast<GLfloat>(target_width),
+                       static_cast<GLfloat>(target_height));
+  impl_->gl.uniform_4f(
+      impl_->video_rect_location, static_cast<GLfloat>(video_x),
+      static_cast<GLfloat>(video_y), static_cast<GLfloat>(video_width),
+      static_cast<GLfloat>(video_height));
+  impl_->gl.uniform_1f(
+      impl_->corner_radius_location,
+      static_cast<GLfloat>(std::clamp(
+          corner_radius_pixels, 0, std::min(target_width, target_height) / 2)));
+  impl_->gl.uniform_1f(impl_->video_enabled_location, has_video ? 1.0f : 0.0f);
+  impl_->gl.bind_buffer(GL_ARRAY_BUFFER, impl_->vertex_buffer);
+  impl_->gl.vertex_attrib_pointer(
+      static_cast<GLuint>(impl_->position_location), 2, GL_FLOAT, GL_FALSE,
+      4 * static_cast<GLsizei>(sizeof(GLfloat)), nullptr);
+  impl_->gl.vertex_attrib_pointer(
+      static_cast<GLuint>(impl_->texcoord_location), 2, GL_FLOAT, GL_FALSE,
+      4 * static_cast<GLsizei>(sizeof(GLfloat)),
+      reinterpret_cast<const void *>(2 * sizeof(GLfloat)));
+  impl_->gl.enable_vertex_attrib_array(
+      static_cast<GLuint>(impl_->position_location));
+  impl_->gl.enable_vertex_attrib_array(
+      static_cast<GLuint>(impl_->texcoord_location));
+  glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
+  const GLenum draw_error = glGetError();
+  RenderOutcome outcome{
+      !upload_succeeded || draw_error != GL_NO_ERROR
+          ? RenderResult::failed
+          : has_video ? RenderResult::rendered : RenderResult::empty,
+      has_video ? source_width : 0, has_video ? source_height : 0,
+      has_video ? sequence : 0};
+
   RestoreVertexAttrib(impl_->gl, static_cast<GLuint>(impl_->position_location),
                       position_state);
   RestoreVertexAttrib(impl_->gl, static_cast<GLuint>(impl_->texcoord_location),
@@ -786,7 +902,7 @@ WindowsOpenGlVideoRenderer::RenderLatest(std::string_view remote_id,
   return outcome;
 }
 
-bool WindowsOpenGlVideoRenderer::CopyLatestNv12(
+bool OpenGlVideoRenderer::CopyLatestNv12(
     std::string_view remote_id, std::vector<unsigned char> *output, int *width,
     int *height) const {
   if (!output || !width || !height) {

src/gui/platform/opengl_video_renderer.h

@@ -0,0 +1,70 @@
+#ifndef CROSSDESK_GUI_PLATFORM_OPENGL_VIDEO_RENDERER_H_
+#define CROSSDESK_GUI_PLATFORM_OPENGL_VIDEO_RENDERER_H_
+
+#include <cstddef>
+#include <cstdint>
+#include <memory>
+#include <string>
+#include <string_view>
+#include <vector>
+
+#include "platform/video_renderer.h"
+
+namespace crossdesk {
+
+// NV12 underlay for Slint's FemtoVG OpenGL renderer on Windows and Linux.
+// MiniRTC submits tightly packed CPU NV12 frames from its decode callback
+// thread. The Slint UI thread uploads the newest frame as Y and UV textures and
+// performs color conversion and scaling in a fragment shader before Slint
+// draws its overlay.
+class OpenGlVideoRenderer final : public VideoRenderer {
+public:
+  OpenGlVideoRenderer();
+  ~OpenGlVideoRenderer() override;
+
+  OpenGlVideoRenderer(const OpenGlVideoRenderer &) = delete;
+  OpenGlVideoRenderer &operator=(const OpenGlVideoRenderer &) = delete;
+
+  // These methods must run while Slint's OpenGL context is current, from the
+  // RenderingSetup and RenderingTeardown notifier states respectively.
+  bool Setup();
+  void Teardown();
+  bool IsReady() const override;
+  bool IsActive() const override;
+
+  // Only the selected stream is queued for upload. Frames for other tabs are
+  // retained by GuiRuntime at a throttled rate for thumbnail/tab restoration.
+  bool SetSelectedStream(std::string remote_id) override;
+  void DiscardStream(std::string_view remote_id) override;
+
+  // Thread-safe; called from MiniRTC's decode callback thread.
+  SubmitResult SubmitNv12(std::string_view remote_id, const uint8_t *data,
+                          size_t size, int width, int height) override;
+  SubmitResult SubmitCachedNv12(std::string_view remote_id, const uint8_t *data,
+                                size_t size, int width, int height) override;
+
+  // Draws below Slint while its OpenGL context is current. All dimensions are
+  // physical pixels in the window client area. corner_radius_pixels clips the
+  // underlay to Slint's custom rounded window surface.
+  RenderOutcome RenderLatest(std::string_view remote_id, int target_width,
+                             int target_height, int top_inset_pixels,
+                             int corner_radius_pixels);
+
+  // Used during disconnect cleanup so thumbnail generation does not require a
+  // second per-frame CPU copy during normal playback.
+  bool CopyLatestNv12(std::string_view remote_id,
+                      std::vector<unsigned char> *output, int *width,
+                      int *height) const override;
+
+private:
+  SubmitResult SubmitNv12Internal(std::string_view remote_id,
+                                  const uint8_t *data, size_t size, int width,
+                                  int height, bool replace_pending);
+
+  struct Impl;
+  std::unique_ptr<Impl> impl_;
+};
+
+} // namespace crossdesk
+
+#endif // CROSSDESK_GUI_PLATFORM_OPENGL_VIDEO_RENDERER_H_

src/gui/platform/tray/linux_tray.cpp

@@ -9,6 +9,7 @@
 #include <X11/Xutil.h>
 #include <X11/extensions/shape.h>
 #include <X11/extensions/Xrender.h>
+#include <dlfcn.h>
 
 #include <algorithm>
 #include <chrono>
@@ -32,14 +33,121 @@ namespace crossdesk {
 namespace {
 
 constexpr int kTrayIconSize = 24;
-constexpr int kMenuHeight = 28;
+constexpr int kMenuItemHeight = 28;
+constexpr int kMenuItemCount = 3;
+constexpr int kMenuVerticalPadding = 4;
+constexpr int kMenuHeight =
+    kMenuItemHeight * kMenuItemCount + kMenuVerticalPadding * 2;
 constexpr int kMenuHorizontalPadding = 12;
+constexpr int kMenuCornerRadius = 8;
+constexpr int kMenuBorderWidth = 1;
+constexpr int kMenuItemHorizontalInset = 4;
+constexpr int kMenuItemVerticalInset = 2;
+constexpr int kMenuItemCornerRadius = 5;
+constexpr int kMenuSeparatorHorizontalInset = 8;
 constexpr int kDockTimeoutMs = 800;
 constexpr int kMaxTrayEventsPerTick = 32;
 constexpr int kMaxTrayEventsDuringEmbed = 16;
 constexpr long kSystemTrayRequestDock = 0;
 constexpr long kXEmbedMapped = 1;
 constexpr long kXEmbedEmbeddedNotify = 0;
+constexpr int kAppIndicatorCategoryApplicationStatus = 0;
+constexpr int kAppIndicatorStatusPassive = 0;
+constexpr int kAppIndicatorStatusActive = 1;
+
+// AppIndicator exports the menu to the desktop shell, which lets GNOME, KDE,
+// and compatible panels render it with their own theme. Load either maintained
+// implementation dynamically so the legacy XEmbed path remains available.
+struct DesktopIndicatorApi {
+  using SignalCallback = void (*)(void*, void*);
+  using SignalDestroyNotify = void (*)(void*, void*);
+
+  void* library = nullptr;
+  void* (*indicator_new_with_path)(const char*, const char*, int,
+                                   const char*) = nullptr;
+  void (*indicator_set_status)(void*, int) = nullptr;
+  void (*indicator_set_menu)(void*, void*) = nullptr;
+  void (*indicator_set_title)(void*, const char*) = nullptr;
+  int (*gtk_init_check)(int*, char***) = nullptr;
+  void* (*gtk_menu_new)() = nullptr;
+  void* (*gtk_menu_item_new_with_label)(const char*) = nullptr;
+  void* (*gtk_separator_menu_item_new)() = nullptr;
+  void (*gtk_menu_shell_append)(void*, void*) = nullptr;
+  void (*gtk_widget_show_all)(void*) = nullptr;
+  void (*gtk_widget_destroy)(void*) = nullptr;
+  int (*gtk_events_pending)() = nullptr;
+  int (*gtk_main_iteration_do)(int) = nullptr;
+  unsigned long (*signal_connect_data)(void*, const char*, SignalCallback,
+                                       void*, SignalDestroyNotify,
+                                       int) = nullptr;
+  void (*object_unref)(void*) = nullptr;
+};
+
+template <typename T>
+bool LoadDesktopIndicatorSymbol(void* library, T* function,
+                                const char* symbol_name) {
+  *function = reinterpret_cast<T>(dlsym(library, symbol_name));
+  return *function != nullptr;
+}
+
+void UnloadDesktopIndicatorApi(DesktopIndicatorApi* api) {
+  if (api->library) {
+    dlclose(api->library);
+  }
+  *api = DesktopIndicatorApi{};
+}
+
+bool LoadDesktopIndicatorApi(DesktopIndicatorApi* api) {
+  for (const char* library_name : {"libayatana-appindicator3.so.1",
+                                   "libappindicator3.so.1"}) {
+    api->library = dlopen(library_name, RTLD_NOW | RTLD_LOCAL);
+    if (api->library) {
+      break;
+    }
+  }
+  if (!api->library) {
+    return false;
+  }
+
+  const bool loaded =
+      LoadDesktopIndicatorSymbol(api->library,
+                                 &api->indicator_new_with_path,
+                                 "app_indicator_new_with_path") &&
+      LoadDesktopIndicatorSymbol(api->library, &api->indicator_set_status,
+                                 "app_indicator_set_status") &&
+      LoadDesktopIndicatorSymbol(api->library, &api->indicator_set_menu,
+                                 "app_indicator_set_menu") &&
+      LoadDesktopIndicatorSymbol(api->library, &api->indicator_set_title,
+                                 "app_indicator_set_title") &&
+      LoadDesktopIndicatorSymbol(api->library, &api->gtk_init_check,
+                                 "gtk_init_check") &&
+      LoadDesktopIndicatorSymbol(api->library, &api->gtk_menu_new,
+                                 "gtk_menu_new") &&
+      LoadDesktopIndicatorSymbol(api->library,
+                                 &api->gtk_menu_item_new_with_label,
+                                 "gtk_menu_item_new_with_label") &&
+      LoadDesktopIndicatorSymbol(api->library,
+                                 &api->gtk_separator_menu_item_new,
+                                 "gtk_separator_menu_item_new") &&
+      LoadDesktopIndicatorSymbol(api->library, &api->gtk_menu_shell_append,
+                                 "gtk_menu_shell_append") &&
+      LoadDesktopIndicatorSymbol(api->library, &api->gtk_widget_show_all,
+                                 "gtk_widget_show_all") &&
+      LoadDesktopIndicatorSymbol(api->library, &api->gtk_widget_destroy,
+                                 "gtk_widget_destroy") &&
+      LoadDesktopIndicatorSymbol(api->library, &api->gtk_events_pending,
+                                 "gtk_events_pending") &&
+      LoadDesktopIndicatorSymbol(api->library, &api->gtk_main_iteration_do,
+                                 "gtk_main_iteration_do") &&
+      LoadDesktopIndicatorSymbol(api->library, &api->signal_connect_data,
+                                 "g_signal_connect_data") &&
+      LoadDesktopIndicatorSymbol(api->library, &api->object_unref,
+                                 "g_object_unref");
+  if (!loaded) {
+    UnloadDesktopIndicatorApi(api);
+  }
+  return loaded;
+}
 
 bool IsAsciiPrintable(const std::string& text) {
   for (unsigned char ch : text) {
@@ -50,7 +158,21 @@ bool IsAsciiPrintable(const std::string& text) {
   return true;
 }
 
-std::string GetMenuLabel(int language_index) {
+std::string GetShowMainWindowMenuLabel(int language_index) {
+  const int normalized_index = localization::detail::ClampLanguageIndex(
+      language_index);
+  const std::string& label = localization::show_main_window[normalized_index];
+  return label.empty() ? "Show Main Window" : label;
+}
+
+std::string GetSettingsMenuLabel(int language_index) {
+  const int normalized_index = localization::detail::ClampLanguageIndex(
+      language_index);
+  const std::string& label = localization::settings[normalized_index];
+  return label.empty() ? "Settings" : label;
+}
+
+std::string GetExitMenuLabel(int language_index) {
   const int normalized_index = localization::detail::ClampLanguageIndex(
       language_index);
   const std::string& label = localization::exit_program[normalized_index];
@@ -73,6 +195,62 @@ unsigned long AllocateColor(Display* display, int screen, const char* name,
   return fallback;
 }
 
+void FillRoundedRectangle(Display* display, Drawable drawable, GC gc, int x,
+                          int y, int width, int height, int radius) {
+  if (!display || !drawable || !gc || width <= 0 || height <= 0) {
+    return;
+  }
+
+  const int clamped_radius =
+      std::clamp(radius, 0, std::min(width, height) / 2);
+  if (clamped_radius == 0) {
+    XFillRectangle(display, drawable, gc, x, y, width, height);
+    return;
+  }
+
+  const int diameter = clamped_radius * 2;
+  XFillRectangle(display, drawable, gc, x + clamped_radius, y,
+                 width - diameter, height);
+  XFillRectangle(display, drawable, gc, x, y + clamped_radius, width,
+                 height - diameter);
+  XFillArc(display, drawable, gc, x, y, diameter, diameter, 0, 360 * 64);
+  XFillArc(display, drawable, gc, x + width - diameter, y, diameter, diameter,
+           0, 360 * 64);
+  XFillArc(display, drawable, gc, x, y + height - diameter, diameter, diameter,
+           0, 360 * 64);
+  XFillArc(display, drawable, gc, x + width - diameter,
+           y + height - diameter, diameter, diameter, 0, 360 * 64);
+}
+
+bool IsPointInsideRoundedRectangle(int point_x, int point_y, int x, int y,
+                                   int width, int height, int radius) {
+  if (point_x < x || point_y < y || point_x >= x + width ||
+      point_y >= y + height) {
+    return false;
+  }
+
+  const int clamped_radius =
+      std::clamp(radius, 0, std::min(width, height) / 2);
+  if (clamped_radius == 0 ||
+      (point_x >= x + clamped_radius &&
+       point_x < x + width - clamped_radius) ||
+      (point_y >= y + clamped_radius &&
+       point_y < y + height - clamped_radius)) {
+    return true;
+  }
+
+  const int center_x = point_x < x + clamped_radius
+                           ? x + clamped_radius
+                           : x + width - clamped_radius - 1;
+  const int center_y = point_y < y + clamped_radius
+                           ? y + clamped_radius
+                           : y + height - clamped_radius - 1;
+  const int delta_x = point_x - center_x;
+  const int delta_y = point_y - center_y;
+  return delta_x * delta_x + delta_y * delta_y <=
+         clamped_radius * clamped_radius;
+}
+
 std::vector<std::filesystem::path> BuildIconCandidatePaths() {
   std::vector<std::filesystem::path> paths = {
       "icons/linux/crossdesk_32x32.png",
@@ -117,6 +295,22 @@ std::vector<std::filesystem::path> BuildIconCandidatePaths() {
   return paths;
 }
 
+std::pair<std::string, std::string> ResolveDesktopIndicatorIcon() {
+  for (const auto& candidate : BuildIconCandidatePaths()) {
+    std::error_code error;
+    if (!std::filesystem::exists(candidate, error) || error) {
+      continue;
+    }
+
+    const auto absolute_path = std::filesystem::absolute(candidate, error);
+    if (!error) {
+      return {absolute_path.stem().string(),
+              absolute_path.parent_path().string()};
+    }
+  }
+  return {"crossdesk", {}};
+}
+
 int CountMaskBits(unsigned long mask) {
   int count = 0;
   while (mask) {
@@ -187,20 +381,42 @@ struct LinuxTrayImpl {
         tooltip(std::move(tray_tooltip)),
         language_index(language_index_value),
         exit_event_type(tray_exit_event_type),
-        menu_label(GetMenuLabel(language_index_value)),
-        menu_ascii_label(IsAsciiPrintable(menu_label) ? menu_label : "Exit") {}
+        show_menu_label(GetShowMainWindowMenuLabel(language_index_value)),
+        show_menu_ascii_label(IsAsciiPrintable(show_menu_label)
+                                  ? show_menu_label
+                                  : "Show Main Window"),
+        settings_menu_label(GetSettingsMenuLabel(language_index_value)),
+        settings_menu_ascii_label(IsAsciiPrintable(settings_menu_label)
+                                      ? settings_menu_label
+                                      : "Settings"),
+        exit_menu_label(GetExitMenuLabel(language_index_value)),
+        exit_menu_ascii_label(IsAsciiPrintable(exit_menu_label)
+                                  ? exit_menu_label
+                                  : "Exit") {}
 
   explicit LinuxTrayImpl(std::function<void()> show_window_callback,
                          std::function<void()> hide_window_callback,
+                         std::function<void()> open_settings_callback,
                          std::function<void()> exit_callback,
                          std::string tray_tooltip, int language_index_value)
       : show_window(std::move(show_window_callback)),
         hide_window(std::move(hide_window_callback)),
+        open_settings(std::move(open_settings_callback)),
         exit_app(std::move(exit_callback)),
         tooltip(std::move(tray_tooltip)),
         language_index(language_index_value),
-        menu_label(GetMenuLabel(language_index_value)),
-        menu_ascii_label(IsAsciiPrintable(menu_label) ? menu_label : "Exit") {}
+        show_menu_label(GetShowMainWindowMenuLabel(language_index_value)),
+        show_menu_ascii_label(IsAsciiPrintable(show_menu_label)
+                                  ? show_menu_label
+                                  : "Show Main Window"),
+        settings_menu_label(GetSettingsMenuLabel(language_index_value)),
+        settings_menu_ascii_label(IsAsciiPrintable(settings_menu_label)
+                                      ? settings_menu_label
+                                      : "Settings"),
+        exit_menu_label(GetExitMenuLabel(language_index_value)),
+        exit_menu_ascii_label(IsAsciiPrintable(exit_menu_label)
+                                  ? exit_menu_label
+                                  : "Exit") {}
 
   ~LinuxTrayImpl() { RemoveTrayIcon(); }
 
@@ -218,6 +434,7 @@ struct LinuxTrayImpl {
   }
 
   void RemoveTrayIcon() {
+    RemoveDesktopIndicator();
     HideMenu();
 
     if (display && icon_window) {
@@ -264,9 +481,137 @@ struct LinuxTrayImpl {
     tray_manager_window = 0;
   }
 
-  void ProcessEvents() { ProcessPendingEvents(kMaxTrayEventsPerTick); }
+  void ProcessEvents() {
+    ProcessDesktopIndicatorEvents();
+    ProcessPendingEvents(kMaxTrayEventsPerTick);
+  }
 
  private:
+  static void OnDesktopShowWindow(void*, void* user_data) {
+    auto* self = static_cast<LinuxTrayImpl*>(user_data);
+    if (self) {
+      self->ShowWindow();
+    }
+  }
+
+  static void OnDesktopOpenSettings(void*, void* user_data) {
+    auto* self = static_cast<LinuxTrayImpl*>(user_data);
+    if (self) {
+      self->OpenSettings();
+    }
+  }
+
+  static void OnDesktopExit(void*, void* user_data) {
+    auto* self = static_cast<LinuxTrayImpl*>(user_data);
+    if (self) {
+      self->RequestExit();
+    }
+  }
+
+  bool EnsureDesktopIndicator() {
+    if (desktop_indicator) {
+      return true;
+    }
+    if (desktop_indicator_attempted) {
+      return false;
+    }
+    desktop_indicator_attempted = true;
+
+    if (!LoadDesktopIndicatorApi(&desktop_indicator_api)) {
+      LOG_INFO(
+          "Desktop AppIndicator runtime unavailable; using XEmbed tray "
+          "fallback");
+      return false;
+    }
+    if (!desktop_indicator_api.gtk_init_check(nullptr, nullptr)) {
+      LOG_INFO(
+          "GTK could not connect to the desktop; using XEmbed tray fallback");
+      return false;
+    }
+
+    desktop_menu = desktop_indicator_api.gtk_menu_new();
+    void* show_item = desktop_indicator_api.gtk_menu_item_new_with_label(
+        show_menu_label.c_str());
+    void* settings_item = desktop_indicator_api.gtk_menu_item_new_with_label(
+        settings_menu_label.c_str());
+    void* separator = desktop_indicator_api.gtk_separator_menu_item_new();
+    void* exit_item = desktop_indicator_api.gtk_menu_item_new_with_label(
+        exit_menu_label.c_str());
+    if (!desktop_menu || !show_item || !settings_item || !separator ||
+        !exit_item) {
+      if (desktop_menu) {
+        desktop_indicator_api.gtk_widget_destroy(desktop_menu);
+        desktop_menu = nullptr;
+      }
+      return false;
+    }
+
+    desktop_indicator_api.signal_connect_data(
+        show_item, "activate", &LinuxTrayImpl::OnDesktopShowWindow, this,
+        nullptr, 0);
+    desktop_indicator_api.signal_connect_data(
+        settings_item, "activate", &LinuxTrayImpl::OnDesktopOpenSettings, this,
+        nullptr, 0);
+    desktop_indicator_api.signal_connect_data(
+        exit_item, "activate", &LinuxTrayImpl::OnDesktopExit, this, nullptr, 0);
+    desktop_indicator_api.gtk_menu_shell_append(desktop_menu, show_item);
+    desktop_indicator_api.gtk_menu_shell_append(desktop_menu, settings_item);
+    desktop_indicator_api.gtk_menu_shell_append(desktop_menu, separator);
+    desktop_indicator_api.gtk_menu_shell_append(desktop_menu, exit_item);
+    desktop_indicator_api.gtk_widget_show_all(desktop_menu);
+
+    const auto [icon_name, icon_path] = ResolveDesktopIndicatorIcon();
+    desktop_indicator = desktop_indicator_api.indicator_new_with_path(
+        "crossdesk", icon_name.c_str(),
+        kAppIndicatorCategoryApplicationStatus,
+        icon_path.empty() ? nullptr : icon_path.c_str());
+    if (!desktop_indicator) {
+      desktop_indicator_api.gtk_widget_destroy(desktop_menu);
+      desktop_menu = nullptr;
+      return false;
+    }
+
+    desktop_indicator_api.indicator_set_title(desktop_indicator,
+                                               tooltip.c_str());
+    desktop_indicator_api.indicator_set_menu(desktop_indicator, desktop_menu);
+    desktop_indicator_api.indicator_set_status(desktop_indicator,
+                                               kAppIndicatorStatusActive);
+    ProcessDesktopIndicatorEvents();
+    LOG_INFO("Linux tray registered through the desktop AppIndicator service");
+    return true;
+  }
+
+  void RemoveDesktopIndicator() {
+    if (desktop_indicator) {
+      desktop_indicator_api.indicator_set_status(
+          desktop_indicator, kAppIndicatorStatusPassive);
+    }
+    if (desktop_menu) {
+      desktop_indicator_api.gtk_widget_destroy(desktop_menu);
+      desktop_menu = nullptr;
+    }
+    if (desktop_indicator) {
+      desktop_indicator_api.object_unref(desktop_indicator);
+      desktop_indicator = nullptr;
+    }
+    // GTK registers process-wide types and callbacks. Keep the dynamically
+    // loaded module resident after initialization and let process teardown
+    // release it, instead of invalidating those registrations with dlclose().
+  }
+
+  void ProcessDesktopIndicatorEvents() {
+    if (!desktop_indicator) {
+      return;
+    }
+
+    int processed = 0;
+    while (processed < kMaxTrayEventsPerTick &&
+           desktop_indicator_api.gtk_events_pending()) {
+      desktop_indicator_api.gtk_main_iteration_do(0);
+      ++processed;
+    }
+  }
+
   int ProcessPendingEvents(int max_events) {
     if (!display) {
       return 0;
@@ -314,6 +659,8 @@ struct LinuxTrayImpl {
     SelectArgbVisual();
     brand_pixel = AllocateColor(display, screen, "#2563eb", black_pixel);
     hover_pixel = AllocateColor(display, screen, "#e5e7eb", white_pixel);
+    menu_border_pixel =
+        AllocateColor(display, screen, "#d1d5db", black_pixel);
     int shape_event_base = 0;
     int shape_error_base = 0;
     shape_available =
@@ -328,6 +675,10 @@ struct LinuxTrayImpl {
     xembed_info_atom = XInternAtom(display, "_XEMBED_INFO", False);
     utf8_string_atom = XInternAtom(display, "UTF8_STRING", False);
     net_wm_name_atom = XInternAtom(display, "_NET_WM_NAME", False);
+    net_wm_window_type_atom =
+        XInternAtom(display, "_NET_WM_WINDOW_TYPE", False);
+    net_wm_window_type_popup_menu_atom =
+        XInternAtom(display, "_NET_WM_WINDOW_TYPE_POPUP_MENU", False);
 
     char** missing_charset_list = nullptr;
     int missing_charset_count = 0;
@@ -386,6 +737,9 @@ struct LinuxTrayImpl {
   }
 
   bool EnsureTrayIcon() {
+    if (EnsureDesktopIndicator()) {
+      return true;
+    }
     if (docked && icon_window) {
       return true;
     }
@@ -540,6 +894,17 @@ struct LinuxTrayImpl {
         HandleButtonRelease(event.xbutton);
         break;
 
+      case MotionNotify:
+        if (event.xmotion.window == menu_window) {
+          const int hovered_item =
+              MenuItemAt(event.xmotion.x, event.xmotion.y);
+          if (hovered_item != hovered_menu_item) {
+            hovered_menu_item = hovered_item;
+            DrawMenu();
+          }
+        }
+        break;
+
       case LeaveNotify:
         if (event.xcrossing.window == menu_window) {
           HideMenu();
@@ -553,12 +918,14 @@ struct LinuxTrayImpl {
 
   void HandleButtonRelease(const XButtonEvent& event) {
     if (menu_window && event.window == menu_window) {
-      const bool inside_menu =
-          event.x >= 0 && event.y >= 0 && event.x < menu_width &&
-          event.y < kMenuHeight;
-      const bool activate_exit = inside_menu && event.button == Button1;
+      const int selected_item =
+          event.button == Button1 ? MenuItemAt(event.x, event.y) : -1;
       HideMenu();
-      if (activate_exit) {
+      if (selected_item == 0) {
+        ShowWindow();
+      } else if (selected_item == 1) {
+        OpenSettings();
+      } else if (selected_item == 2) {
         RequestExit();
       }
       return;
@@ -571,9 +938,7 @@ struct LinuxTrayImpl {
       return;
     }
 
-    if (event.button == Button1) {
-      ShowWindow();
-    } else if (event.button == Button3) {
+    if (event.button == Button1 || event.button == Button3) {
       ShowMenu(event.x_root, event.y_root);
     }
   }
@@ -824,29 +1189,76 @@ struct LinuxTrayImpl {
     return false;
   }
 
-  int MenuTextWidth() const {
+  int MenuTextWidth(const std::string& label,
+                    const std::string& ascii_label) const {
     if (menu_font) {
       XGlyphInfo extents{};
       XftTextExtentsUtf8(display, menu_font,
-                         reinterpret_cast<const FcChar8*>(menu_label.c_str()),
-                         static_cast<int>(menu_label.size()), &extents);
+                         reinterpret_cast<const FcChar8*>(label.c_str()),
+                         static_cast<int>(label.size()), &extents);
       return extents.xOff;
     }
 
     if (font_set) {
       XRectangle ink{};
       XRectangle logical{};
-      Xutf8TextExtents(font_set, menu_label.c_str(),
-                       static_cast<int>(menu_label.size()), &ink, &logical);
+      Xutf8TextExtents(font_set, label.c_str(), static_cast<int>(label.size()),
+                       &ink, &logical);
       return logical.width;
     }
 
     if (fallback_font) {
-      return XTextWidth(fallback_font, menu_ascii_label.c_str(),
-                        static_cast<int>(menu_ascii_label.size()));
+      return XTextWidth(fallback_font, ascii_label.c_str(),
+                        static_cast<int>(ascii_label.size()));
     }
 
-    return static_cast<int>(menu_ascii_label.size()) * 8;
+    return static_cast<int>(ascii_label.size()) * 8;
+  }
+
+  int MenuItemAt(int x, int y) const {
+    if (!IsPointInsideRoundedRectangle(x, y, 0, 0, menu_width, kMenuHeight,
+                                       kMenuCornerRadius)) {
+      return -1;
+    }
+
+    const int content_y = y - kMenuVerticalPadding;
+    if (content_y < 0 ||
+        content_y >= kMenuItemHeight * kMenuItemCount) {
+      return -1;
+    }
+    return content_y / kMenuItemHeight;
+  }
+
+  void ApplyMenuShape() {
+    if (!shape_available || !display || !menu_window) {
+      return;
+    }
+
+    Pixmap shape_mask =
+        XCreatePixmap(display, menu_window, menu_width, kMenuHeight, 1);
+    if (!shape_mask) {
+      return;
+    }
+
+    GC shape_gc = XCreateGC(display, shape_mask, 0, nullptr);
+    if (!shape_gc) {
+      XFreePixmap(display, shape_mask);
+      return;
+    }
+
+    XSetForeground(display, shape_gc, 0);
+    XFillRectangle(display, shape_mask, shape_gc, 0, 0, menu_width,
+                   kMenuHeight);
+    XSetForeground(display, shape_gc, 1);
+    FillRoundedRectangle(display, shape_mask, shape_gc, 0, 0, menu_width,
+                         kMenuHeight, kMenuCornerRadius);
+    XShapeCombineMask(display, menu_window, ShapeBounding, 0, 0, shape_mask,
+                      ShapeSet);
+    XShapeCombineMask(display, menu_window, ShapeInput, 0, 0, shape_mask,
+                      ShapeSet);
+
+    XFreeGC(display, shape_gc);
+    XFreePixmap(display, shape_mask);
   }
 
   void ShowMenu(int root_x, int root_y) {
@@ -856,7 +1268,15 @@ struct LinuxTrayImpl {
 
     HideMenu();
 
-    menu_width = std::max(72, MenuTextWidth() + kMenuHorizontalPadding * 2);
+    menu_width =
+        std::max({72,
+                  MenuTextWidth(show_menu_label, show_menu_ascii_label) +
+                      kMenuHorizontalPadding * 2,
+                  MenuTextWidth(settings_menu_label,
+                                settings_menu_ascii_label) +
+                      kMenuHorizontalPadding * 2,
+                  MenuTextWidth(exit_menu_label, exit_menu_ascii_label) +
+                      kMenuHorizontalPadding * 2});
     const int display_width = DisplayWidth(display, screen);
     const int display_height = DisplayHeight(display, screen);
     const int x = std::clamp(root_x, 0, std::max(0, display_width - menu_width));
@@ -865,23 +1285,31 @@ struct LinuxTrayImpl {
 
     XSetWindowAttributes attrs{};
     attrs.override_redirect = True;
-    attrs.background_pixel = white_pixel;
-    attrs.border_pixel = black_pixel;
+    attrs.background_pixel = menu_border_pixel;
     attrs.event_mask = ExposureMask | ButtonPressMask | ButtonReleaseMask |
-                       LeaveWindowMask;
+                       PointerMotionMask | LeaveWindowMask;
     menu_window = XCreateWindow(
-        display, root_window, x, y, menu_width, kMenuHeight, 1, CopyFromParent,
+        display, root_window, x, y, menu_width, kMenuHeight, 0, CopyFromParent,
         InputOutput, CopyFromParent,
-        CWOverrideRedirect | CWBackPixel | CWBorderPixel | CWEventMask, &attrs);
+        CWOverrideRedirect | CWBackPixel | CWEventMask, &attrs);
     if (!menu_window) {
       return;
     }
 
+    if (net_wm_window_type_atom && net_wm_window_type_popup_menu_atom) {
+      const Atom window_type = net_wm_window_type_popup_menu_atom;
+      XChangeProperty(display, menu_window, net_wm_window_type_atom, XA_ATOM,
+                      32, PropModeReplace,
+                      reinterpret_cast<const unsigned char*>(&window_type), 1);
+    }
+    ApplyMenuShape();
+
     menu_visible = true;
+    hovered_menu_item = -1;
     XMapRaised(display, menu_window);
     XGrabPointer(display, menu_window, False,
-                 ButtonPressMask | ButtonReleaseMask, GrabModeAsync,
-                 GrabModeAsync, None, None, CurrentTime);
+                 ButtonPressMask | ButtonReleaseMask | PointerMotionMask,
+                 GrabModeAsync, GrabModeAsync, None, None, CurrentTime);
     DrawMenu();
     XFlush(display);
   }
@@ -889,6 +1317,7 @@ struct LinuxTrayImpl {
   void HideMenu() {
     if (!display || !menu_window) {
       menu_visible = false;
+      hovered_menu_item = -1;
       return;
     }
 
@@ -896,6 +1325,7 @@ struct LinuxTrayImpl {
     XDestroyWindow(display, menu_window);
     menu_window = 0;
     menu_visible = false;
+    hovered_menu_item = -1;
     XFlush(display);
   }
 
@@ -905,47 +1335,82 @@ struct LinuxTrayImpl {
     }
 
     GC gc = XCreateGC(display, menu_window, 0, nullptr);
+    XSetForeground(display, gc, menu_border_pixel);
+    FillRoundedRectangle(display, menu_window, gc, 0, 0, menu_width,
+                         kMenuHeight, kMenuCornerRadius);
     XSetForeground(display, gc, white_pixel);
-    XFillRectangle(display, menu_window, gc, 0, 0, menu_width, kMenuHeight);
+    FillRoundedRectangle(
+        display, menu_window, gc, kMenuBorderWidth, kMenuBorderWidth,
+        menu_width - kMenuBorderWidth * 2,
+        kMenuHeight - kMenuBorderWidth * 2,
+        kMenuCornerRadius - kMenuBorderWidth);
+    if (hovered_menu_item >= 0 && hovered_menu_item < kMenuItemCount) {
+      XSetForeground(display, gc, hover_pixel);
+      FillRoundedRectangle(
+          display, menu_window, gc, kMenuItemHorizontalInset,
+          kMenuVerticalPadding + hovered_menu_item * kMenuItemHeight +
+              kMenuItemVerticalInset,
+          menu_width - kMenuItemHorizontalInset * 2,
+          kMenuItemHeight - kMenuItemVerticalInset * 2,
+          kMenuItemCornerRadius);
+    }
     XSetForeground(display, gc, hover_pixel);
-    XFillRectangle(display, menu_window, gc, 1, 1, menu_width - 2,
-                   kMenuHeight - 2);
+    XDrawLine(display, menu_window, gc, kMenuSeparatorHorizontalInset,
+              kMenuVerticalPadding + kMenuItemHeight * 2,
+              menu_width - kMenuSeparatorHorizontalInset,
+              kMenuVerticalPadding + kMenuItemHeight * 2);
     XSetForeground(display, gc, black_pixel);
 
-    int baseline = kMenuHeight / 2 + 5;
-    if (menu_font && menu_text_color_allocated) {
-      XftDraw* draw = XftDrawCreate(display, menu_window,
-                                    DefaultVisual(display, screen),
-                                    DefaultColormap(display, screen));
-      if (draw) {
-        baseline = (kMenuHeight - (menu_font->ascent + menu_font->descent)) /
+    XftDraw* xft_draw = menu_font && menu_text_color_allocated
+                            ? XftDrawCreate(display, menu_window,
+                                            DefaultVisual(display, screen),
+                                            DefaultColormap(display, screen))
+                            : nullptr;
+    auto draw_label = [&](int item_index, const std::string& label,
+                          const std::string& ascii_label) {
+      const int item_y =
+          kMenuVerticalPadding + item_index * kMenuItemHeight;
+      int baseline = item_y + kMenuItemHeight / 2 + 5;
+      if (xft_draw) {
+        baseline = item_y +
+                   (kMenuItemHeight -
+                    (menu_font->ascent + menu_font->descent)) /
                        2 +
                    menu_font->ascent;
         XftDrawStringUtf8(
-            draw, &menu_text_color, menu_font, kMenuHorizontalPadding, baseline,
-            reinterpret_cast<const FcChar8*>(menu_label.c_str()),
-            static_cast<int>(menu_label.size()));
-        XftDrawDestroy(draw);
+            xft_draw, &menu_text_color, menu_font, kMenuHorizontalPadding,
+            baseline, reinterpret_cast<const FcChar8*>(label.c_str()),
+            static_cast<int>(label.size()));
+      } else if (font_set) {
+        XFontSetExtents* extents = XExtentsOfFontSet(font_set);
+        if (extents) {
+          baseline = item_y +
+                     (kMenuItemHeight -
+                      extents->max_logical_extent.height) /
+                         2 -
+                     extents->max_logical_extent.y;
+        }
+        Xutf8DrawString(display, menu_window, font_set, gc,
+                        kMenuHorizontalPadding, baseline, label.c_str(),
+                        static_cast<int>(label.size()));
+      } else {
+        if (fallback_font) {
+          XSetFont(display, gc, fallback_font->fid);
+          baseline = item_y +
+                     (kMenuItemHeight + fallback_font->ascent -
+                      fallback_font->descent) /
+                         2;
+        }
+        XDrawString(display, menu_window, gc, kMenuHorizontalPadding, baseline,
+                    ascii_label.c_str(),
+                    static_cast<int>(ascii_label.size()));
       }
-    } else if (font_set) {
-      XFontSetExtents* extents = XExtentsOfFontSet(font_set);
-      if (extents) {
-        baseline = (kMenuHeight - extents->max_logical_extent.height) / 2 -
-                   extents->max_logical_extent.y;
-      }
-      Xutf8DrawString(display, menu_window, font_set, gc,
-                      kMenuHorizontalPadding, baseline, menu_label.c_str(),
-                      static_cast<int>(menu_label.size()));
-    } else {
-      if (fallback_font) {
-        XSetFont(display, gc, fallback_font->fid);
-        baseline = (kMenuHeight + fallback_font->ascent -
-                    fallback_font->descent) /
-                   2;
-      }
-      XDrawString(display, menu_window, gc, kMenuHorizontalPadding, baseline,
-                  menu_ascii_label.c_str(),
-                  static_cast<int>(menu_ascii_label.size()));
+    };
+    draw_label(0, show_menu_label, show_menu_ascii_label);
+    draw_label(1, settings_menu_label, settings_menu_ascii_label);
+    draw_label(2, exit_menu_label, exit_menu_ascii_label);
+    if (xft_draw) {
+      XftDrawDestroy(xft_draw);
     }
 
     XFreeGC(display, gc);
@@ -962,6 +1427,14 @@ struct LinuxTrayImpl {
     }
   }
 
+  void OpenSettings() {
+    if (open_settings) {
+      open_settings();
+    } else {
+      ShowWindow();
+    }
+  }
+
   void RequestExit() {
     if (exit_app) {
       exit_app();
@@ -978,12 +1451,21 @@ struct LinuxTrayImpl {
   ::SDL_Window* app_window = nullptr;
   std::function<void()> show_window;
   std::function<void()> hide_window;
+  std::function<void()> open_settings;
   std::function<void()> exit_app;
   std::string tooltip;
   int language_index = 0;
   uint32_t exit_event_type = 0;
-  std::string menu_label;
-  std::string menu_ascii_label;
+  std::string show_menu_label;
+  std::string show_menu_ascii_label;
+  std::string settings_menu_label;
+  std::string settings_menu_ascii_label;
+  std::string exit_menu_label;
+  std::string exit_menu_ascii_label;
+  DesktopIndicatorApi desktop_indicator_api;
+  void* desktop_indicator = nullptr;
+  void* desktop_menu = nullptr;
+  bool desktop_indicator_attempted = false;
   Display* display = nullptr;
   int screen = 0;
   ::Window root_window = 0;
@@ -996,10 +1478,13 @@ struct LinuxTrayImpl {
   Atom xembed_info_atom = None;
   Atom utf8_string_atom = None;
   Atom net_wm_name_atom = None;
+  Atom net_wm_window_type_atom = None;
+  Atom net_wm_window_type_popup_menu_atom = None;
   unsigned long black_pixel = 0;
   unsigned long white_pixel = 0;
   unsigned long brand_pixel = 0;
   unsigned long hover_pixel = 0;
+  unsigned long menu_border_pixel = 0;
   Visual* icon_visual = nullptr;
   int icon_depth = 0;
   Colormap icon_colormap = 0;
@@ -1014,6 +1499,7 @@ struct LinuxTrayImpl {
   int icon_width = 0;
   int icon_height = 0;
   int menu_width = 72;
+  int hovered_menu_item = -1;
   bool docked = false;
   bool embedded = false;
   bool menu_visible = false;
@@ -1028,11 +1514,13 @@ LinuxTray::LinuxTray(::SDL_Window* app_window, const std::string& tooltip,
 
 LinuxTray::LinuxTray(std::function<void()> show_window,
                      std::function<void()> hide_window,
+                     std::function<void()> open_settings,
                      std::function<void()> exit_app,
                      const std::string& tooltip, int language_index)
     : impl_(std::make_unique<LinuxTrayImpl>(
-          std::move(show_window), std::move(hide_window), std::move(exit_app),
-          tooltip, language_index)) {}
+          std::move(show_window), std::move(hide_window),
+          std::move(open_settings), std::move(exit_app), tooltip,
+          language_index)) {}
 
 LinuxTray::~LinuxTray() = default;
 

src/gui/platform/tray/linux_tray.h

@@ -25,7 +25,9 @@ class LinuxTray {
   LinuxTray(::SDL_Window* app_window, const std::string& tooltip,
             int language_index, uint32_t exit_event_type);
   LinuxTray(std::function<void()> show_window,
-            std::function<void()> hide_window, std::function<void()> exit_app,
+            std::function<void()> hide_window,
+            std::function<void()> open_settings,
+            std::function<void()> exit_app,
             const std::string& tooltip, int language_index);
   ~LinuxTray();
 

src/gui/platform/tray/mac_tray.mm

@@ -13,6 +13,7 @@
 @interface CrossDeskMacTrayTarget : NSObject
 - (instancetype)initWithOwner:(crossdesk::MacTrayImpl *)owner;
 - (void)statusItemClicked:(id)sender;
+- (void)showMainWindow:(id)sender;
 - (void)openSettings:(id)sender;
 - (void)exitApplication:(id)sender;
 @end
@@ -84,6 +85,19 @@ struct MacTrayImpl {
     }
 
     NSMenu *menu = [[NSMenu alloc] initWithTitle:@"CrossDesk"];
+    [menu setAppearance:[NSAppearance appearanceNamed:NSAppearanceNameAqua]];
+
+    NSString *show_main_window_title =
+        NSStringFromUtf8(localization::show_main_window
+                             [localization::detail::ClampLanguageIndex(
+                                 language_index)]);
+    NSMenuItem *show_main_window_item =
+        [[NSMenuItem alloc] initWithTitle:show_main_window_title
+                                  action:@selector(showMainWindow:)
+                           keyEquivalent:@""];
+    [show_main_window_item setTarget:target];
+    [menu addItem:show_main_window_item];
+
     NSString *settings_title =
         NSStringFromUtf8(localization::settings
                              [localization::detail::ClampLanguageIndex(
@@ -287,14 +301,7 @@ void MacTray::RemoveTrayIcon() { impl_->RemoveTrayIcon(); }
   if (!owner_) {
     return;
   }
-
-  NSEvent *event = [NSApp currentEvent];
-  if (event && [event type] == NSEventTypeRightMouseUp) {
-    owner_->ShowMenu();
-    return;
-  }
-
-  owner_->ShowWindow();
+  owner_->ShowMenu();
 }
 
 - (void)exitApplication:(id)sender {
@@ -304,6 +311,13 @@ void MacTray::RemoveTrayIcon() { impl_->RemoveTrayIcon(); }
   }
 }
 
+- (void)showMainWindow:(id)sender {
+  (void)sender;
+  if (owner_) {
+    owner_->ShowWindow();
+  }
+}
+
 - (void)openSettings:(id)sender {
   (void)sender;
   if (owner_) {

src/gui/platform/tray/win_tray.cpp

@@ -64,11 +64,13 @@ WinTray::WinTray(HWND app_hwnd, HICON icon, const std::wstring& tooltip,
 
 WinTray::WinTray(std::function<void()> show_window,
                  std::function<void()> hide_window,
+                 std::function<void()> open_settings,
                  std::function<void()> exit_app, HICON icon,
                  const std::wstring& tooltip, int language_index)
     : WinTray(nullptr, icon, tooltip, language_index) {
   show_window_ = std::move(show_window);
   hide_window_ = std::move(hide_window);
+  open_settings_ = std::move(open_settings);
   exit_app_ = std::move(exit_app);
 }
 
@@ -97,6 +99,14 @@ void WinTray::ShowApplicationWindow() {
   }
 }
 
+void WinTray::OpenSettings() {
+  if (open_settings_) {
+    open_settings_();
+  } else {
+    ShowApplicationWindow();
+  }
+}
+
 bool WinTray::HandleTrayMessage(MSG* msg) {
   if (!msg || msg->message != WM_TRAY_CALLBACK) return false;
 
@@ -111,6 +121,20 @@ bool WinTray::HandleTrayMessage(MSG* msg) {
       POINT pt;
       GetCursorPos(&pt);
       HMENU menu = CreatePopupMenu();
+      HBRUSH menu_background = CreateSolidBrush(RGB(255, 255, 255));
+      if (menu_background) {
+        MENUINFO menu_info{};
+        menu_info.cbSize = sizeof(menu_info);
+        menu_info.fMask = MIM_BACKGROUND | MIM_APPLYTOSUBMENUS;
+        menu_info.hbrBack = menu_background;
+        SetMenuInfo(menu, &menu_info);
+      }
+
+      AppendMenuW(menu, MF_STRING, 1002,
+                  localization::GetShowMainWindowLabel(language_index_));
+      AppendMenuW(menu, MF_STRING, 1003,
+                  localization::GetSettingsLabel(language_index_));
+      AppendMenuW(menu, MF_SEPARATOR, 0, nullptr);
       AppendMenuW(menu, MF_STRING, 1001,
                   localization::GetExitProgramLabel(language_index_));
 
@@ -119,6 +143,9 @@ bool WinTray::HandleTrayMessage(MSG* msg) {
           TrackPopupMenu(menu, TPM_RETURNCMD | TPM_NONOTIFY | TPM_LEFTALIGN,
                          pt.x, pt.y, 0, hwnd_message_only_, nullptr);
       DestroyMenu(menu);
+      if (menu_background) {
+        DeleteObject(menu_background);
+      }
 
       // handle menu command
       if (cmd == 1001) {
@@ -131,6 +158,8 @@ bool WinTray::HandleTrayMessage(MSG* msg) {
         }
       } else if (cmd == 1002) {
         ShowApplicationWindow();
+      } else if (cmd == 1003) {
+        OpenSettings();
       }
       break;
     }

src/gui/platform/tray/win_tray.h

@@ -22,7 +22,9 @@ class WinTray {
   WinTray(HWND app_hwnd, HICON icon, const std::wstring& tooltip,
           int language_index);
   WinTray(std::function<void()> show_window,
-          std::function<void()> hide_window, std::function<void()> exit_app,
+          std::function<void()> hide_window,
+          std::function<void()> open_settings,
+          std::function<void()> exit_app,
           HICON icon, const std::wstring& tooltip, int language_index);
   ~WinTray();
 
@@ -32,6 +34,7 @@ class WinTray {
 
  private:
   void ShowApplicationWindow();
+  void OpenSettings();
 
   HWND app_hwnd_;
   HWND hwnd_message_only_;
@@ -41,6 +44,7 @@ class WinTray {
   NOTIFYICONDATA nid_;
   std::function<void()> show_window_;
   std::function<void()> hide_window_;
+  std::function<void()> open_settings_;
   std::function<void()> exit_app_;
 };
 }  // namespace crossdesk

src/gui/platform/video_renderer.h

@@ -0,0 +1,70 @@
+#ifndef CROSSDESK_GUI_PLATFORM_VIDEO_RENDERER_H_
+#define CROSSDESK_GUI_PLATFORM_VIDEO_RENDERER_H_
+
+#include <cstddef>
+#include <cstdint>
+#include <memory>
+#include <string>
+#include <string_view>
+#include <vector>
+
+namespace crossdesk {
+
+// Platform-independent contract for the native stream video renderer.
+//
+// Frame submission and snapshot methods may be called from MiniRTC callback
+// threads. Surface setup, rendering and teardown remain backend-specific and
+// are driven by the Slint presentation module on the UI thread.
+class VideoRenderer {
+public:
+  enum class SubmitResult {
+    submitted,
+    not_selected,
+    dropped,
+    failed,
+  };
+
+  enum class RenderResult {
+    rendered,
+    idle,
+    empty,
+    failed,
+  };
+
+  struct RenderOutcome {
+    RenderResult result = RenderResult::failed;
+    int width = 0;
+    int height = 0;
+    uint64_t sequence = 0;
+  };
+
+  virtual ~VideoRenderer() = default;
+
+  virtual bool IsReady() const = 0;
+
+  // True only while the renderer can accept and present native frames. Metal
+  // additionally requires attachment to an AppKit view; OpenGL requires an
+  // active Slint rendering context.
+  virtual bool IsActive() const = 0;
+
+  virtual bool SetSelectedStream(std::string remote_id) = 0;
+  virtual void DiscardStream(std::string_view remote_id) = 0;
+
+  virtual SubmitResult SubmitNv12(std::string_view remote_id,
+                                  const uint8_t* data, size_t size, int width,
+                                  int height) = 0;
+  virtual SubmitResult SubmitCachedNv12(std::string_view remote_id,
+                                        const uint8_t* data, size_t size,
+                                        int width, int height) = 0;
+
+  virtual bool CopyLatestNv12(std::string_view remote_id,
+                              std::vector<unsigned char>* output, int* width,
+                              int* height) const = 0;
+};
+
+// Exactly one factory implementation is linked for the target platform.
+std::unique_ptr<VideoRenderer> CreateVideoRenderer();
+
+}  // namespace crossdesk
+
+#endif  // CROSSDESK_GUI_PLATFORM_VIDEO_RENDERER_H_

src/gui/platform/video_renderer_factory_metal.mm

@@ -0,0 +1,13 @@
+#include "platform/video_renderer.h"
+
+#include <memory>
+
+#include "platform/metal_video_renderer.h"
+
+namespace crossdesk {
+
+std::unique_ptr<VideoRenderer> CreateVideoRenderer() {
+  return std::make_unique<MacMetalVideoRenderer>();
+}
+
+}  // namespace crossdesk

src/gui/platform/video_renderer_factory_opengl.cpp

@@ -0,0 +1,12 @@
+#include <memory>
+
+#include "platform/opengl_video_renderer.h"
+#include "platform/video_renderer.h"
+
+namespace crossdesk {
+
+std::unique_ptr<VideoRenderer> CreateVideoRenderer() {
+  return std::make_unique<OpenGlVideoRenderer>();
+}
+
+}  // namespace crossdesk

src/gui/platform/windows_opengl_video_renderer.h

@@ -1,86 +0,0 @@
-#ifndef CROSSDESK_GUI_PLATFORM_WINDOWS_OPENGL_VIDEO_RENDERER_H_
-#define CROSSDESK_GUI_PLATFORM_WINDOWS_OPENGL_VIDEO_RENDERER_H_
-
-#include <cstddef>
-#include <cstdint>
-#include <memory>
-#include <string>
-#include <string_view>
-#include <vector>
-
-namespace crossdesk {
-
-// Windows NV12 underlay for Slint's FemtoVG OpenGL renderer. MiniRTC submits
-// tightly packed CPU NV12 frames from its decode callback thread. The Slint UI
-// thread uploads the newest frame as Y and UV textures and performs color
-// conversion and scaling in a fragment shader before Slint draws its overlay.
-class WindowsOpenGlVideoRenderer {
-public:
-  enum class SubmitResult {
-    submitted,
-    not_selected,
-    dropped,
-    failed,
-  };
-
-  enum class RenderResult {
-    rendered,
-    idle,
-    empty,
-    failed,
-  };
-
-  struct RenderOutcome {
-    RenderResult result = RenderResult::failed;
-    int width = 0;
-    int height = 0;
-    uint64_t sequence = 0;
-  };
-
-  WindowsOpenGlVideoRenderer();
-  ~WindowsOpenGlVideoRenderer();
-
-  WindowsOpenGlVideoRenderer(const WindowsOpenGlVideoRenderer &) = delete;
-  WindowsOpenGlVideoRenderer &
-  operator=(const WindowsOpenGlVideoRenderer &) = delete;
-
-  // These methods must run while Slint's OpenGL context is current, from the
-  // RenderingSetup and RenderingTeardown notifier states respectively.
-  bool Setup();
-  void Teardown();
-  bool IsReady() const;
-
-  // Only the selected stream is queued for upload. Frames for other tabs are
-  // retained by GuiRuntime at a throttled rate for thumbnail/tab restoration.
-  bool SetSelectedStream(std::string remote_id);
-  void DiscardStream(std::string_view remote_id);
-
-  // Thread-safe; called from MiniRTC's decode callback thread.
-  SubmitResult SubmitNv12(std::string_view remote_id, const uint8_t *data,
-                          size_t size, int width, int height);
-  SubmitResult SubmitCachedNv12(std::string_view remote_id, const uint8_t *data,
-                                size_t size, int width, int height);
-
-  // Draws below Slint while its OpenGL context is current. target dimensions
-  // and top_inset_pixels are physical pixels in the window client area.
-  RenderOutcome RenderLatest(std::string_view remote_id, int target_width,
-                             int target_height, int top_inset_pixels);
-
-  // Used during disconnect cleanup so thumbnail generation does not require a
-  // second per-frame CPU copy during normal playback.
-  bool CopyLatestNv12(std::string_view remote_id,
-                      std::vector<unsigned char> *output, int *width,
-                      int *height) const;
-
-private:
-  SubmitResult SubmitNv12Internal(std::string_view remote_id,
-                                  const uint8_t *data, size_t size, int width,
-                                  int height, bool replace_pending);
-
-  struct Impl;
-  std::unique_ptr<Impl> impl_;
-};
-
-} // namespace crossdesk
-
-#endif // CROSSDESK_GUI_PLATFORM_WINDOWS_OPENGL_VIDEO_RENDERER_H_

src/gui/rendering/slint_video_presenter.cpp

@@ -0,0 +1,502 @@
+#include "rendering/slint_video_presenter.h"
+
+#include <libyuv.h>
+#include <slint.h>
+
+#include <algorithm>
+#include <cmath>
+#include <mutex>
+#include <unordered_map>
+#include <utility>
+
+#include "nv12_scaler.h"
+#include "platform/video_renderer.h"
+#include "rd_log.h"
+
+#if defined(__APPLE__)
+#include "platform/metal_video_renderer.h"
+#else
+#if defined(_WIN32)
+#include <windows.h>
+#endif
+#include <GL/gl.h>
+
+#include "platform/opengl_video_renderer.h"
+#endif
+
+namespace crossdesk {
+namespace {
+
+#if !defined(__APPLE__)
+constexpr GLint kGlClampToEdge = 0x812F;
+constexpr float kStreamWindowCornerRadius = 12.0f;
+#else
+constexpr int kMetalAttachmentAttemptLimit = 30;
+#endif
+
+struct VideoRenderSize {
+  int width = 0;
+  int height = 0;
+
+  bool operator==(const VideoRenderSize&) const = default;
+};
+
+VideoRenderSize FitVideoToRenderArea(int source_width, int source_height,
+                                     int area_width, int area_height) {
+  if (source_width <= 0 || source_height <= 0 || area_width <= 0 ||
+      area_height <= 0) {
+    return {};
+  }
+
+  const double scale =
+      std::min({1.0, static_cast<double>(area_width) / source_width,
+                static_cast<double>(area_height) / source_height});
+  int width = std::max(2, static_cast<int>(std::floor(source_width * scale)));
+  int height = std::max(2, static_cast<int>(std::floor(source_height * scale)));
+
+  width &= ~1;
+  height &= ~1;
+  return {std::min(width, source_width & ~1),
+          std::min(height, source_height & ~1)};
+}
+
+}  // namespace
+
+struct SlintVideoPresenter::Impl {
+  explicit Impl(VideoRenderer& renderer) : renderer(renderer) {}
+
+  VideoRenderer& renderer;
+  slint::ComponentHandle<ui::StreamWindow>* stream = nullptr;
+  StateProvider state_provider;
+  DirtyCallback dirty_callback;
+  std::unordered_map<std::string, uint64_t> displayed_frame_sequence;
+  std::unordered_map<std::string, uint64_t> seeded_frame_sequence;
+  std::vector<uint8_t> scaled_video_frame;
+  std::vector<uint8_t> scaled_video_frame_scratch;
+
+#if defined(__APPLE__)
+  int attachment_attempts = 0;
+  bool skip_attachment_once = false;
+#else
+  std::mutex gl_mutex;
+  std::vector<uint8_t> gl_conversion_frame;
+  std::vector<uint8_t> gl_pending_frame;
+  uint32_t gl_texture = 0;
+  VideoRenderSize gl_texture_size;
+  VideoRenderSize gl_image_size;
+  VideoRenderSize gl_pending_size;
+  bool gl_pending_dirty = false;
+#endif
+
+  SurfaceState CurrentState() const {
+    return state_provider ? state_provider() : SurfaceState{};
+  }
+
+  void MarkDirty() const {
+    if (dirty_callback) {
+      dirty_callback();
+    }
+  }
+
+  bool MarkPresented(const std::string& remote_id, uint64_t sequence) {
+    if (remote_id.empty() || sequence == 0 ||
+        displayed_frame_sequence[remote_id] == sequence) {
+      return false;
+    }
+    displayed_frame_sequence[remote_id] = sequence;
+    return true;
+  }
+
+#if !defined(__APPLE__)
+  void ConfigureOpenGlNotifier() {
+    if (!stream) {
+      return;
+    }
+
+    const auto error = (*stream)->window().set_rendering_notifier(
+        [this](slint::RenderingState state, slint::GraphicsAPI graphics_api) {
+          if (graphics_api != slint::GraphicsAPI::NativeOpenGL) {
+            return;
+          }
+
+          std::lock_guard lock(gl_mutex);
+          auto* opengl_renderer =
+              dynamic_cast<OpenGlVideoRenderer*>(&renderer);
+          if (state == slint::RenderingState::RenderingSetup) {
+            GLuint texture = 0;
+            glGenTextures(1, &texture);
+            if (texture == 0) {
+              return;
+            }
+            GLint previous_texture = 0;
+            glGetIntegerv(GL_TEXTURE_BINDING_2D, &previous_texture);
+            glBindTexture(GL_TEXTURE_2D, texture);
+            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, kGlClampToEdge);
+            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, kGlClampToEdge);
+            glBindTexture(GL_TEXTURE_2D, static_cast<GLuint>(previous_texture));
+            gl_texture = texture;
+            if (opengl_renderer && opengl_renderer->Setup()) {
+              const std::string selected_stream =
+                  CurrentState().selected_stream;
+              opengl_renderer->SetSelectedStream(selected_stream);
+              seeded_frame_sequence.erase(selected_stream);
+              MarkDirty();
+            }
+            return;
+          }
+
+          if (state == slint::RenderingState::BeforeRendering && stream &&
+              opengl_renderer && opengl_renderer->IsReady() &&
+              (*stream)->get_native_video_enabled()) {
+            const SurfaceState surface = CurrentState();
+            const auto window_size = (*stream)->window().size();
+            const float scale_factor =
+                std::max(1.0f, (*stream)->window().scale_factor());
+            const int top_inset =
+                !surface.fullscreen && surface.tab_count > 1
+                    ? static_cast<int>(std::lround(30.0f * scale_factor))
+                    : 0;
+            const bool rounded_window = (*stream)->get_custom_titlebar() &&
+                                        !surface.fullscreen &&
+                                        !(*stream)->window().is_maximized();
+            const int corner_radius =
+                rounded_window ? static_cast<int>(std::lround(
+                                     kStreamWindowCornerRadius * scale_factor))
+                               : 0;
+            opengl_renderer->RenderLatest(
+                surface.selected_stream, static_cast<int>(window_size.width),
+                static_cast<int>(window_size.height), top_inset, corner_radius);
+            return;
+          }
+
+          if (state == slint::RenderingState::BeforeRendering &&
+              gl_texture != 0 && gl_pending_dirty &&
+              !gl_pending_frame.empty()) {
+            GLint previous_texture = 0;
+            GLint previous_unpack_alignment = 0;
+            glGetIntegerv(GL_TEXTURE_BINDING_2D, &previous_texture);
+            glGetIntegerv(GL_UNPACK_ALIGNMENT, &previous_unpack_alignment);
+            glBindTexture(GL_TEXTURE_2D, gl_texture);
+            glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+            if (gl_texture_size != gl_pending_size) {
+              glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, gl_pending_size.width,
+                           gl_pending_size.height, 0, GL_RGBA, GL_UNSIGNED_BYTE,
+                           gl_pending_frame.data());
+              gl_texture_size = gl_pending_size;
+            } else {
+              glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, gl_pending_size.width,
+                              gl_pending_size.height, GL_RGBA, GL_UNSIGNED_BYTE,
+                              gl_pending_frame.data());
+            }
+            glPixelStorei(GL_UNPACK_ALIGNMENT, previous_unpack_alignment);
+            glBindTexture(GL_TEXTURE_2D, static_cast<GLuint>(previous_texture));
+            gl_pending_dirty = false;
+            return;
+          }
+
+          if (state == slint::RenderingState::RenderingTeardown) {
+            if (opengl_renderer) {
+              opengl_renderer->Teardown();
+            }
+            if (gl_texture != 0) {
+              const GLuint texture = gl_texture;
+              glDeleteTextures(1, &texture);
+            }
+            gl_texture = 0;
+            gl_texture_size = {};
+            gl_image_size = {};
+            gl_pending_size = {};
+            gl_pending_dirty = false;
+            gl_pending_frame.clear();
+          }
+        });
+
+    if (error.has_value()) {
+      LOG_WARN("Slint OpenGL video renderer unavailable, using pixel buffers");
+    } else {
+      renderer.SetSelectedStream(CurrentState().selected_stream);
+    }
+  }
+#endif
+};
+
+SlintVideoPresenter::SlintVideoPresenter(VideoRenderer& renderer)
+    : impl_(std::make_unique<Impl>(renderer)) {}
+
+SlintVideoPresenter::~SlintVideoPresenter() = default;
+
+void SlintVideoPresenter::PrepareWindow(
+    slint::ComponentHandle<ui::StreamWindow>& stream,
+    StateProvider state_provider, DirtyCallback dirty_callback) {
+  impl_->stream = &stream;
+  impl_->state_provider = std::move(state_provider);
+  impl_->dirty_callback = std::move(dirty_callback);
+#if defined(__APPLE__)
+  stream->set_native_video_enabled(false);
+  impl_->attachment_attempts = kMetalAttachmentAttemptLimit;
+  impl_->skip_attachment_once = true;
+#else
+  impl_->ConfigureOpenGlNotifier();
+#endif
+}
+
+bool SlintVideoPresenter::EnsureAttached() {
+#if defined(__APPLE__)
+  if (!impl_->stream || impl_->attachment_attempts <= 0) {
+    return false;
+  }
+  if (impl_->skip_attachment_once) {
+    impl_->skip_attachment_once = false;
+    return false;
+  }
+
+  auto* metal_renderer =
+      dynamic_cast<MacMetalVideoRenderer*>(&impl_->renderer);
+  if (!metal_renderer) {
+    impl_->attachment_attempts = 0;
+    (*impl_->stream)->set_native_video_enabled(false);
+    return false;
+  }
+  if (!metal_renderer->IsReady()) {
+    impl_->attachment_attempts = 0;
+    (*impl_->stream)->set_native_video_enabled(false);
+    return false;
+  }
+  if (metal_renderer->IsAttached()) {
+    impl_->attachment_attempts = 0;
+    return false;
+  }
+
+  if (void* view = (*impl_->stream)->window().appkit_view()) {
+    (*impl_->stream)->set_native_video_enabled(true);
+    if (metal_renderer->Attach(view)) {
+      impl_->attachment_attempts = 0;
+      const SurfaceState surface = impl_->CurrentState();
+      impl_->displayed_frame_sequence.erase(surface.selected_stream);
+      impl_->seeded_frame_sequence.erase(surface.selected_stream);
+      if (metal_renderer->SetSelectedStream(surface.selected_stream)) {
+        impl_->MarkDirty();
+      }
+      return true;
+    }
+    (*impl_->stream)->set_native_video_enabled(false);
+  }
+
+  if (--impl_->attachment_attempts == 0) {
+    (*impl_->stream)->set_native_video_enabled(false);
+    LOG_WARN("Unable to attach the Metal video surface; using CPU rendering");
+  }
+#endif
+  return false;
+}
+
+bool SlintVideoPresenter::NeedsRedraw() const {
+#if defined(__APPLE__)
+  const auto* metal_renderer =
+      dynamic_cast<const MacMetalVideoRenderer*>(&impl_->renderer);
+  return metal_renderer && metal_renderer->IsActive() &&
+         metal_renderer->NeedsSurfaceRedraw();
+#else
+  return false;
+#endif
+}
+
+bool SlintVideoPresenter::SelectStream(std::string remote_id) {
+  const bool changed = impl_->renderer.SetSelectedStream(remote_id);
+  if (changed && !remote_id.empty()) {
+    impl_->seeded_frame_sequence.erase(remote_id);
+  }
+  return changed;
+}
+
+SlintVideoPresenter::PresentResult SlintVideoPresenter::Present(
+    const Frame& frame) {
+  PresentResult result;
+  if (!impl_->stream || frame.remote_id.empty()) {
+    return result;
+  }
+
+  if (impl_->renderer.IsActive() && frame.nv12 && frame.width > 0 &&
+      frame.height > 0 && frame.sequence > 0 &&
+      impl_->seeded_frame_sequence[frame.remote_id] != frame.sequence) {
+    const auto submit_result = impl_->renderer.SubmitCachedNv12(
+        frame.remote_id, frame.nv12->data(), frame.nv12->size(), frame.width,
+        frame.height);
+    if (submit_result == VideoRenderer::SubmitResult::submitted ||
+        submit_result == VideoRenderer::SubmitResult::dropped) {
+      impl_->seeded_frame_sequence[frame.remote_id] = frame.sequence;
+    }
+  }
+
+#if defined(__APPLE__)
+  auto* metal_renderer =
+      dynamic_cast<MacMetalVideoRenderer*>(&impl_->renderer);
+  if (metal_renderer && metal_renderer->IsActive()) {
+    const SurfaceState surface = impl_->CurrentState();
+    const double top_inset =
+        !surface.fullscreen && surface.tab_count > 1 ? 30.0 : 0.0;
+    const auto outcome = metal_renderer->RenderLatest(
+        frame.remote_id, top_inset, !surface.fullscreen);
+    if (outcome.result == VideoRenderer::RenderResult::rendered) {
+      (*impl_->stream)->set_has_frame(true);
+      (*impl_->stream)->set_receiving_text("");
+      result.width = outcome.width;
+      result.height = outcome.height;
+      result.new_frame =
+          impl_->MarkPresented(frame.remote_id, outcome.sequence);
+    } else if (outcome.result == VideoRenderer::RenderResult::empty) {
+      (*impl_->stream)->set_has_frame(false);
+    }
+    return result;
+  }
+#else
+  auto* opengl_renderer =
+      dynamic_cast<OpenGlVideoRenderer*>(&impl_->renderer);
+  if (opengl_renderer && opengl_renderer->IsReady()) {
+    opengl_renderer->SetSelectedStream(frame.remote_id);
+    if (!(*impl_->stream)->get_native_video_enabled()) {
+      (*impl_->stream)->set_native_video_enabled(true);
+    }
+
+    const bool has_frame =
+        frame.width > 0 && frame.height > 0 && frame.sequence > 0;
+    (*impl_->stream)->set_has_frame(has_frame);
+    if (has_frame) {
+      (*impl_->stream)->set_receiving_text("");
+      result.width = frame.width;
+      result.height = frame.height;
+      result.new_frame = impl_->MarkPresented(frame.remote_id, frame.sequence);
+    }
+    (*impl_->stream)->window().request_redraw();
+    return result;
+  }
+  if ((*impl_->stream)->get_native_video_enabled()) {
+    (*impl_->stream)->set_native_video_enabled(false);
+  }
+#endif
+
+  const size_t nv12_size =
+      static_cast<size_t>(frame.width) * frame.height * 3 / 2;
+  if (!frame.nv12 || frame.width <= 0 || frame.height <= 0 ||
+      frame.nv12->size() < nv12_size) {
+    (*impl_->stream)->set_has_frame(false);
+    return result;
+  }
+  if (impl_->displayed_frame_sequence[frame.remote_id] == frame.sequence) {
+    return result;
+  }
+
+  const auto window_size = (*impl_->stream)->window().size();
+  const VideoRenderSize render_size = FitVideoToRenderArea(
+      frame.width, frame.height, static_cast<int>(window_size.width),
+      static_cast<int>(window_size.height));
+  const uint8_t* y_plane = frame.nv12->data();
+  const uint8_t* uv_plane =
+      frame.nv12->data() + static_cast<size_t>(frame.width) * frame.height;
+  int output_width = frame.width;
+  int output_height = frame.height;
+
+  if (render_size.width > 0 && render_size.height > 0 &&
+      (render_size.width != frame.width ||
+       render_size.height != frame.height)) {
+    const size_t scaled_nv12_size =
+        static_cast<size_t>(render_size.width) * render_size.height * 3 / 2;
+    impl_->scaled_video_frame.resize(scaled_nv12_size);
+    uint8_t* scaled_y = impl_->scaled_video_frame.data();
+    uint8_t* scaled_uv =
+        scaled_y + static_cast<size_t>(render_size.width) * render_size.height;
+    if (ScaleNv12ViaI420(y_plane, frame.width, uv_plane, frame.width,
+                         frame.width, frame.height, scaled_y, render_size.width,
+                         scaled_uv, render_size.width, render_size.width,
+                         render_size.height, libyuv::kFilterBox,
+                         &impl_->scaled_video_frame_scratch) == 0) {
+      y_plane = scaled_y;
+      uv_plane = scaled_uv;
+      output_width = render_size.width;
+      output_height = render_size.height;
+    }
+  }
+
+#if !defined(__APPLE__)
+  uint32_t texture_id = 0;
+  {
+    std::lock_guard lock(impl_->gl_mutex);
+    texture_id = impl_->gl_texture;
+  }
+  if (texture_id != 0) {
+    impl_->gl_conversion_frame.resize(static_cast<size_t>(output_width) *
+                                      output_height * 4);
+    if (libyuv::NV12ToABGR(y_plane, output_width, uv_plane, output_width,
+                           impl_->gl_conversion_frame.data(), output_width * 4,
+                           output_width, output_height) != 0) {
+      return result;
+    }
+    {
+      std::lock_guard lock(impl_->gl_mutex);
+      if (impl_->gl_texture == 0) {
+        return result;
+      }
+      texture_id = impl_->gl_texture;
+      impl_->gl_pending_frame.swap(impl_->gl_conversion_frame);
+      impl_->gl_pending_size = {output_width, output_height};
+      impl_->gl_pending_dirty = true;
+    }
+    const VideoRenderSize output_size{output_width, output_height};
+    if (impl_->gl_image_size != output_size) {
+      (*impl_->stream)
+          ->set_frame(slint::Image::create_from_borrowed_gl_2d_rgba_texture(
+              texture_id,
+              slint::Size<uint32_t>{static_cast<uint32_t>(output_width),
+                                    static_cast<uint32_t>(output_height)}));
+      impl_->gl_image_size = output_size;
+    }
+    (*impl_->stream)->set_has_frame(true);
+    (*impl_->stream)->set_receiving_text("");
+    (*impl_->stream)->window().request_redraw();
+    result.width = frame.width;
+    result.height = frame.height;
+    result.new_frame = impl_->MarkPresented(frame.remote_id, frame.sequence);
+    return result;
+  }
+#endif
+
+  slint::SharedPixelBuffer<slint::Rgb8Pixel> pixels(output_width,
+                                                    output_height);
+  if (libyuv::NV12ToRAW(y_plane, output_width, uv_plane, output_width,
+                        reinterpret_cast<uint8_t*>(pixels.begin()),
+                        output_width * 3, output_width, output_height) != 0) {
+    return result;
+  }
+
+  (*impl_->stream)->set_frame(slint::Image(std::move(pixels)));
+  (*impl_->stream)->set_has_frame(true);
+  (*impl_->stream)->set_receiving_text("");
+  result.width = frame.width;
+  result.height = frame.height;
+  result.new_frame = impl_->MarkPresented(frame.remote_id, frame.sequence);
+  return result;
+}
+
+void SlintVideoPresenter::ForgetStream(const std::string& remote_id) {
+  impl_->displayed_frame_sequence.erase(remote_id);
+  impl_->seeded_frame_sequence.erase(remote_id);
+}
+
+void SlintVideoPresenter::Detach() {
+  impl_->renderer.SetSelectedStream({});
+#if defined(__APPLE__)
+  if (auto* metal_renderer =
+          dynamic_cast<MacMetalVideoRenderer*>(&impl_->renderer)) {
+    metal_renderer->Detach();
+  }
+  impl_->attachment_attempts = 0;
+  impl_->skip_attachment_once = false;
+#endif
+  impl_->stream = nullptr;
+  impl_->state_provider = {};
+  impl_->dirty_callback = {};
+}
+
+}  // namespace crossdesk

src/gui/rendering/slint_video_presenter.h

@@ -0,0 +1,75 @@
+#ifndef CROSSDESK_GUI_RENDERING_SLINT_VIDEO_PRESENTER_H_
+#define CROSSDESK_GUI_RENDERING_SLINT_VIDEO_PRESENTER_H_
+
+#include <cstddef>
+#include <cstdint>
+#include <functional>
+#include <memory>
+#include <string>
+#include <vector>
+
+#include "crossdesk_ui.h"
+
+namespace crossdesk {
+
+class VideoRenderer;
+
+// Owns the bridge between decoded NV12 frames, the selected native graphics
+// backend and Slint's StreamWindow. Platform macros and graphics-API lifecycle
+// details are intentionally contained in the implementation file.
+class SlintVideoPresenter {
+public:
+  struct SurfaceState {
+    std::string selected_stream;
+    bool fullscreen = false;
+    size_t tab_count = 0;
+  };
+
+  struct Frame {
+    std::string remote_id;
+    std::shared_ptr<std::vector<unsigned char>> nv12;
+    int width = 0;
+    int height = 0;
+    uint64_t sequence = 0;
+  };
+
+  struct PresentResult {
+    int width = 0;
+    int height = 0;
+    bool new_frame = false;
+  };
+
+  using StateProvider = std::function<SurfaceState()>;
+  using DirtyCallback = std::function<void()>;
+
+  explicit SlintVideoPresenter(VideoRenderer& renderer);
+  ~SlintVideoPresenter();
+
+  SlintVideoPresenter(const SlintVideoPresenter&) = delete;
+  SlintVideoPresenter& operator=(const SlintVideoPresenter&) = delete;
+
+  // Called before the window is shown. OpenGL installs Slint's rendering
+  // notifier here; macOS deliberately defers native view attachment until a
+  // later UI pass, after AppKit has committed the ordinary window style.
+  void PrepareWindow(slint::ComponentHandle<ui::StreamWindow>& stream,
+                     StateProvider state_provider,
+                     DirtyCallback dirty_callback);
+
+  // Returns true only when a deferred native surface became attached during
+  // this call, allowing the caller to seed it from a cached frame once.
+  bool EnsureAttached();
+  bool NeedsRedraw() const;
+
+  bool SelectStream(std::string remote_id);
+  PresentResult Present(const Frame& frame);
+  void ForgetStream(const std::string& remote_id);
+  void Detach();
+
+private:
+  struct Impl;
+  std::unique_ptr<Impl> impl_;
+};
+
+}  // namespace crossdesk
+
+#endif  // CROSSDESK_GUI_RENDERING_SLINT_VIDEO_PRESENTER_H_

src/gui/runtime/connection_runtime.cpp

@@ -11,12 +11,7 @@
 #include "display_stream_id.h"
 #include "localization.h"
 #include "platform.h"
-#if defined(_WIN32)
-#include "platform/windows_opengl_video_renderer.h"
-#endif
-#ifdef __APPLE__
-#include "platform/metal_video_renderer.h"
-#endif
+#include "platform/video_renderer.h"
 #include "rd_log.h"
 #include "runtime/gui_runtime.h"
 
@@ -229,21 +224,14 @@ void GuiRuntime::CloseRemoteSession(std::shared_ptr<RemoteSession> props) {
     frame_snapshot = props->front_frame_;
     video_width = props->video_width_;
     video_height = props->video_height_;
-#if defined(__APPLE__) || defined(_WIN32)
     if ((!frame_snapshot || frame_snapshot->empty()) &&
         props->thumbnail_frame_ && !props->thumbnail_frame_->empty()) {
       frame_snapshot = props->thumbnail_frame_;
       video_width = props->thumbnail_width_;
       video_height = props->thumbnail_height_;
     }
-#endif
   }
-#if defined(__APPLE__) || defined(_WIN32)
-#if defined(_WIN32)
-  auto* native_renderer = windows_opengl_video_renderer_.get();
-#else
-  auto* native_renderer = mac_metal_video_renderer_.get();
-#endif
+  auto* native_renderer = video_renderer_.get();
   if ((!frame_snapshot || frame_snapshot->empty()) && native_renderer) {
     auto native_snapshot = std::make_shared<std::vector<unsigned char>>();
     if (native_renderer->CopyLatestNv12(props->remote_id_,
@@ -252,7 +240,6 @@ void GuiRuntime::CloseRemoteSession(std::shared_ptr<RemoteSession> props) {
       frame_snapshot = std::move(native_snapshot);
     }
   }
-#endif
 
   if (frame_snapshot && !frame_snapshot->empty() && video_width > 0 &&
       video_height > 0) {
@@ -276,12 +263,10 @@ void GuiRuntime::CloseRemoteSession(std::shared_ptr<RemoteSession> props) {
     }
   }
 
-#if defined(__APPLE__) || defined(_WIN32)
   if (native_renderer) {
     native_renderer->DiscardStream(props->remote_id_);
     video_frame_dirty_.store(true, std::memory_order_release);
   }
-#endif
 
   if (props->peer_) {
     LOG_INFO("[{}] Leave connection [{}]", props->local_id_, props->remote_id_);
@@ -343,18 +328,21 @@ void GuiRuntime::ResetRemoteSessionResources(
     std::lock_guard<std::mutex> lock(props->video_frame_mutex_);
     props->front_frame_.reset();
     props->back_frame_.reset();
-#if defined(__APPLE__) || defined(_WIN32)
     props->thumbnail_frame_.reset();
     props->thumbnail_width_ = 0;
     props->thumbnail_height_ = 0;
     props->background_snapshot_time_ = {};
-#endif
     props->video_width_ = 0;
     props->video_height_ = 0;
     props->video_size_ = 0;
     props->render_rect_dirty_ = true;
     props->stream_cleanup_pending_ = false;
   }
+  {
+    std::lock_guard<std::mutex> lock(props->remote_cursor_state_mutex_);
+    props->remote_cursor_state_ = {};
+    props->remote_cursor_state_received_ = false;
+  }
 }
 
 std::shared_ptr<GuiRuntime::RemoteSession> GuiRuntime::FindRemoteSession(

src/gui/runtime/cursor_state_provider.cpp

@@ -0,0 +1,124 @@
+#include "runtime/cursor_state_provider.h"
+
+#if defined(_WIN32)
+
+#include <windows.h>
+
+namespace crossdesk {
+namespace {
+
+bool IsSystemCursor(HCURSOR cursor, LPCWSTR resource) {
+  return cursor != nullptr && cursor == LoadCursorW(nullptr, resource);
+}
+
+RemoteCursorShape ShapeFromWindowsCursor(HCURSOR cursor) {
+  if (IsSystemCursor(cursor, IDC_HELP)) return RemoteCursorShape::help;
+  if (IsSystemCursor(cursor, IDC_HAND)) return RemoteCursorShape::pointer;
+  if (IsSystemCursor(cursor, IDC_APPSTARTING))
+    return RemoteCursorShape::progress;
+  if (IsSystemCursor(cursor, IDC_WAIT)) return RemoteCursorShape::wait;
+  if (IsSystemCursor(cursor, IDC_CROSS)) return RemoteCursorShape::crosshair;
+  if (IsSystemCursor(cursor, IDC_IBEAM)) return RemoteCursorShape::text;
+  if (IsSystemCursor(cursor, IDC_NO))
+    return RemoteCursorShape::not_allowed;
+  if (IsSystemCursor(cursor, IDC_SIZEALL)) return RemoteCursorShape::move;
+  if (IsSystemCursor(cursor, IDC_SIZEWE)) return RemoteCursorShape::ew_resize;
+  if (IsSystemCursor(cursor, IDC_SIZENS)) return RemoteCursorShape::ns_resize;
+  if (IsSystemCursor(cursor, IDC_SIZENESW))
+    return RemoteCursorShape::nesw_resize;
+  if (IsSystemCursor(cursor, IDC_SIZENWSE))
+    return RemoteCursorShape::nwse_resize;
+  if (IsSystemCursor(cursor, IDC_UPARROW)) return RemoteCursorShape::n_resize;
+  return RemoteCursorShape::default_cursor;
+}
+
+}  // namespace
+
+struct CursorStateProvider::Impl {};
+
+CursorStateProvider::CursorStateProvider() : impl_(std::make_unique<Impl>()) {}
+CursorStateProvider::~CursorStateProvider() = default;
+
+bool CursorStateProvider::Sample(CursorState* state) {
+  if (!state) return false;
+
+  CURSORINFO info{};
+  info.cbSize = sizeof(info);
+  if (!GetCursorInfo(&info)) return false;
+
+  state->seq = 0;
+  state->visible = (info.flags & CURSOR_SHOWING) != 0;
+  state->shape = state->visible ? ShapeFromWindowsCursor(info.hCursor)
+                                : RemoteCursorShape::none;
+  return true;
+}
+
+}  // namespace crossdesk
+
+#elif defined(__linux__) && !defined(__APPLE__)
+
+#include <X11/Xlib.h>
+#include <X11/extensions/Xfixes.h>
+
+#include <string>
+
+#include "linux_cursor_shape.h"
+#include "platform.h"
+#include "shared_cursor_state.h"
+
+namespace crossdesk {
+namespace {
+
+bool CursorHasVisiblePixel(const XFixesCursorImage& image) {
+  const size_t pixel_count =
+      static_cast<size_t>(image.width) * static_cast<size_t>(image.height);
+  for (size_t index = 0; index < pixel_count; ++index) {
+    if (((image.pixels[index] >> 24U) & 0xffU) != 0) return true;
+  }
+  return false;
+}
+
+}  // namespace
+
+struct CursorStateProvider::Impl {
+  Display* display = XOpenDisplay(nullptr);
+
+  ~Impl() {
+    if (display) XCloseDisplay(display);
+  }
+};
+
+CursorStateProvider::CursorStateProvider() : impl_(std::make_unique<Impl>()) {}
+CursorStateProvider::~CursorStateProvider() = default;
+
+bool CursorStateProvider::Sample(CursorState* state) {
+  if (!state || !impl_) return false;
+
+  if (IsWaylandSession()) {
+    SharedCursorState shared{};
+    if (GetSharedCursorState(&shared)) {
+      state->seq = 0;
+      state->visible = shared.visible;
+      state->shape = shared.visible ? shared.shape : RemoteCursorShape::none;
+      return true;
+    }
+  }
+
+  if (!impl_->display) return false;
+
+  XFixesCursorImage* image = XFixesGetCursorImage(impl_->display);
+  if (!image) return false;
+
+  const std::string name = image->name ? image->name : "";
+
+  state->seq = 0;
+  state->visible = CursorHasVisiblePixel(*image);
+  state->shape = state->visible ? ShapeFromLinuxCursorName(name)
+                                : RemoteCursorShape::none;
+  XFree(image);
+  return true;
+}
+
+}  // namespace crossdesk
+
+#endif

src/gui/runtime/cursor_state_provider.h

@@ -0,0 +1,29 @@
+#ifndef CROSSDESK_GUI_CURSOR_STATE_PROVIDER_H_
+#define CROSSDESK_GUI_CURSOR_STATE_PROVIDER_H_
+
+#include <memory>
+
+#include "device_controller.h"
+
+namespace crossdesk {
+
+// Samples the cursor that is currently displayed by the controlled desktop
+// and converts platform-specific cursor handles to protocol cursor shapes.
+class CursorStateProvider {
+ public:
+  CursorStateProvider();
+  ~CursorStateProvider();
+
+  CursorStateProvider(const CursorStateProvider&) = delete;
+  CursorStateProvider& operator=(const CursorStateProvider&) = delete;
+
+  bool Sample(CursorState* state);
+
+ private:
+  struct Impl;
+  std::unique_ptr<Impl> impl_;
+};
+
+}  // namespace crossdesk
+
+#endif  // CROSSDESK_GUI_CURSOR_STATE_PROVIDER_H_

src/gui/runtime/cursor_state_provider_mac.mm

@@ -0,0 +1,165 @@
+#include "runtime/cursor_state_provider.h"
+
+#if defined(__APPLE__)
+
+#import <AppKit/AppKit.h>
+#import <CoreGraphics/CGRemoteOperation.h>
+
+#include <cstdint>
+#include <vector>
+
+namespace crossdesk {
+namespace {
+
+struct CursorFingerprint {
+  uint64_t pixel_hash = 0;
+  size_t width = 0;
+  size_t height = 0;
+  size_t bytes_per_row = 0;
+  CFIndex pixel_bytes = 0;
+  NSPoint hot_spot = NSZeroPoint;
+};
+
+struct KnownCursor {
+  CursorFingerprint fingerprint;
+  RemoteCursorShape shape = RemoteCursorShape::default_cursor;
+};
+
+bool FingerprintCursor(NSCursor* cursor, CursorFingerprint* fingerprint) {
+  if (!cursor || !fingerprint || !cursor.image) return false;
+
+  NSRect proposed_rect = {NSZeroPoint, cursor.image.size};
+  CGImageRef image =
+      [cursor.image CGImageForProposedRect:&proposed_rect
+                                   context:nil
+                                     hints:nil];
+  if (!image) return false;
+
+  CGDataProviderRef provider = CGImageGetDataProvider(image);
+  if (!provider) return false;
+
+  CFDataRef data = CGDataProviderCopyData(provider);
+  if (!data) return false;
+
+  // NSCursor.currentSystemCursor returns a fresh NSCursor/NSImage wrapper on
+  // each query. Hash the decoded CGImage pixels so it can still be matched to
+  // AppKit's semantic cursor instances without encoding a large TIFF every
+  // frame.
+  constexpr uint64_t kFnvOffsetBasis = 1469598103934665603ULL;
+  constexpr uint64_t kFnvPrime = 1099511628211ULL;
+  uint64_t hash = kFnvOffsetBasis;
+  const UInt8* bytes = CFDataGetBytePtr(data);
+  const CFIndex length = CFDataGetLength(data);
+  for (CFIndex index = 0; index < length; ++index) {
+    hash ^= bytes[index];
+    hash *= kFnvPrime;
+  }
+
+  fingerprint->pixel_hash = hash;
+  fingerprint->width = CGImageGetWidth(image);
+  fingerprint->height = CGImageGetHeight(image);
+  fingerprint->bytes_per_row = CGImageGetBytesPerRow(image);
+  fingerprint->pixel_bytes = length;
+  fingerprint->hot_spot = cursor.hotSpot;
+  CFRelease(data);
+  return true;
+}
+
+bool SameCursor(const CursorFingerprint& left,
+                const CursorFingerprint& right) {
+  return left.pixel_hash == right.pixel_hash && left.width == right.width &&
+         left.height == right.height &&
+         left.bytes_per_row == right.bytes_per_row &&
+         left.pixel_bytes == right.pixel_bytes &&
+         NSEqualPoints(left.hot_spot, right.hot_spot);
+}
+
+void AddKnownCursor(std::vector<KnownCursor>* cursors, NSCursor* cursor,
+                    RemoteCursorShape shape) {
+  CursorFingerprint fingerprint;
+  if (FingerprintCursor(cursor, &fingerprint)) {
+    cursors->push_back({fingerprint, shape});
+  }
+}
+
+std::vector<KnownCursor> BuildKnownCursors() {
+  std::vector<KnownCursor> cursors;
+  cursors.reserve(16);
+
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
+  AddKnownCursor(&cursors, NSCursor.arrowCursor,
+                 RemoteCursorShape::default_cursor);
+  AddKnownCursor(&cursors, NSCursor.pointingHandCursor,
+                 RemoteCursorShape::pointer);
+  AddKnownCursor(&cursors, NSCursor.crosshairCursor,
+                 RemoteCursorShape::crosshair);
+  AddKnownCursor(&cursors, NSCursor.IBeamCursor, RemoteCursorShape::text);
+  AddKnownCursor(&cursors, NSCursor.IBeamCursorForVerticalLayout,
+                 RemoteCursorShape::text);
+  AddKnownCursor(&cursors, NSCursor.operationNotAllowedCursor,
+                 RemoteCursorShape::not_allowed);
+  AddKnownCursor(&cursors, NSCursor.dragLinkCursor, RemoteCursorShape::alias);
+  AddKnownCursor(&cursors, NSCursor.dragCopyCursor, RemoteCursorShape::copy);
+  AddKnownCursor(&cursors, NSCursor.openHandCursor, RemoteCursorShape::grab);
+  AddKnownCursor(&cursors, NSCursor.closedHandCursor,
+                 RemoteCursorShape::grabbing);
+  AddKnownCursor(&cursors, NSCursor.resizeLeftRightCursor,
+                 RemoteCursorShape::ew_resize);
+  AddKnownCursor(&cursors, NSCursor.resizeUpDownCursor,
+                 RemoteCursorShape::ns_resize);
+  AddKnownCursor(&cursors, NSCursor.resizeUpCursor,
+                 RemoteCursorShape::n_resize);
+  AddKnownCursor(&cursors, NSCursor.resizeRightCursor,
+                 RemoteCursorShape::e_resize);
+  AddKnownCursor(&cursors, NSCursor.resizeDownCursor,
+                 RemoteCursorShape::s_resize);
+  AddKnownCursor(&cursors, NSCursor.resizeLeftCursor,
+                 RemoteCursorShape::w_resize);
+#pragma clang diagnostic pop
+
+  return cursors;
+}
+
+RemoteCursorShape ShapeFromMacCursor(NSCursor* cursor) {
+  CursorFingerprint fingerprint;
+  if (!FingerprintCursor(cursor, &fingerprint)) {
+    return RemoteCursorShape::default_cursor;
+  }
+
+  // Sampling begins from the UI tick, after AppKit has initialized its cursor
+  // catalog. Cache those fingerprints because only the current cursor needs
+  // to be decoded on subsequent frames.
+  static const std::vector<KnownCursor> known_cursors = BuildKnownCursors();
+  for (const KnownCursor& known : known_cursors) {
+    if (SameCursor(fingerprint, known.fingerprint)) return known.shape;
+  }
+  return RemoteCursorShape::default_cursor;
+}
+
+}  // namespace
+
+struct CursorStateProvider::Impl {};
+
+CursorStateProvider::CursorStateProvider() : impl_(std::make_unique<Impl>()) {}
+CursorStateProvider::~CursorStateProvider() = default;
+
+bool CursorStateProvider::Sample(CursorState* state) {
+  if (!state) return false;
+
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
+  NSCursor* cursor = NSCursor.currentSystemCursor;
+  const bool visible = CGCursorIsVisible();
+#pragma clang diagnostic pop
+
+  state->seq = 0;
+  state->visible = visible && cursor != nil;
+  state->shape = state->visible ? ShapeFromMacCursor(cursor)
+                                : RemoteCursorShape::none;
+  return true;
+}
+
+}  // namespace crossdesk
+
+#endif

src/gui/runtime/gui_runtime.cpp

@@ -12,12 +12,7 @@
 
 #include "display_stream_id.h"
 #include "localization.h"
-#if defined(_WIN32)
-#include "platform/windows_opengl_video_renderer.h"
-#endif
-#ifdef __APPLE__
-#include "platform/metal_video_renderer.h"
-#endif
+#include "platform/video_renderer.h"
 #include "rd_log.h"
 
 namespace crossdesk {

src/gui/runtime/gui_runtime.h

@@ -15,12 +15,7 @@
 
 namespace crossdesk {
 
-#if defined(_WIN32)
-class WindowsOpenGlVideoRenderer;
-#endif
-#ifdef __APPLE__
-class MacMetalVideoRenderer;
-#endif
+class VideoRenderer;
 
 // Shared GUI runtime. It owns subsystem controllers and cross-cutting session
 // state, but no window lifecycle, ImGui view, or transport callback methods.
@@ -90,12 +85,7 @@ class GuiRuntime : protected gui_detail::GuiState {
   KeyboardController keyboard_;
   PeerEventHandler peer_events_;
   std::atomic<bool> video_frame_dirty_{false};
-#if defined(_WIN32)
-  std::unique_ptr<WindowsOpenGlVideoRenderer> windows_opengl_video_renderer_;
-#endif
-#ifdef __APPLE__
-  std::unique_ptr<MacMetalVideoRenderer> mac_metal_video_renderer_;
-#endif
+  std::unique_ptr<VideoRenderer> video_renderer_;
 
  private:
   friend class ClipboardController;

src/gui/runtime/peer_data_callbacks.cpp

@@ -164,6 +164,40 @@ void PeerEventHandler::OnReceiveDataBuffer(
     return;
   }
 
+  if (remote_action.type == ControlType::cursor_state) {
+    std::shared_ptr<GuiRuntime::RemoteSession> props;
+    {
+      std::shared_lock lock(runtime->remote_sessions_mutex_);
+      auto props_it = runtime->remote_sessions_.find(remote_id);
+      if (props_it != runtime->remote_sessions_.end()) {
+        props = props_it->second;
+      }
+    }
+    if (!props) {
+      return;
+    }
+
+    std::lock_guard lock(props->remote_cursor_state_mutex_);
+    const uint32_t previous_seq = props->remote_cursor_state_.seq;
+    const bool is_newer =
+        !props->remote_cursor_state_received_ ||
+        static_cast<int32_t>(remote_action.cs.seq - previous_seq) > 0;
+    if (is_newer) {
+      const bool changed =
+          !props->remote_cursor_state_received_ ||
+          props->remote_cursor_state_.visible != remote_action.cs.visible ||
+          props->remote_cursor_state_.shape != remote_action.cs.shape;
+      props->remote_cursor_state_ = remote_action.cs;
+      props->remote_cursor_state_received_ = true;
+      if (changed) {
+        LOG_INFO("Received cursor state: seq={}, visible={}, shape={}",
+                 remote_action.cs.seq, remote_action.cs.visible,
+                 static_cast<int>(remote_action.cs.shape));
+      }
+    }
+    return;
+  }
+
   if (remote_action.type == ControlType::host_infomation) {
     bool is_client_mode = false;
     std::shared_ptr<GuiRuntime::RemoteSession> props;

src/gui/runtime/peer_event_handler.cpp

@@ -16,12 +16,7 @@
 #include "file_transfer.h"
 #include "localization.h"
 #include "platform.h"
-#if defined(_WIN32)
-#include "platform/windows_opengl_video_renderer.h"
-#endif
-#ifdef __APPLE__
-#include "platform/metal_video_renderer.h"
-#endif
+#include "platform/video_renderer.h"
 #include "rd_log.h"
 #include "runtime/gui_runtime.h"
 #include "runtime/remote_action_codec.h"
@@ -254,6 +249,11 @@ void PeerEventHandler::OnConnectionStatus(ConnectionStatus status,
     switch (status) {
       case ConnectionStatus::Connected: {
         runtime->ResetRemoteServiceStatus(*props);
+        {
+          std::lock_guard lock(props->remote_cursor_state_mutex_);
+          props->remote_cursor_state_ = {};
+          props->remote_cursor_state_received_ = false;
+        }
         {
           RemoteAction remote_action;
           remote_action.i.display_num =
@@ -318,63 +318,52 @@ void PeerEventHandler::OnConnectionStatus(ConnectionStatus status,
         props->connection_established_ = false;
         props->enable_mouse_control_ = false;
         runtime->ResetRemoteServiceStatus(*props);
+        {
+          std::lock_guard lock(props->remote_cursor_state_mutex_);
+          props->remote_cursor_state_ = {};
+          props->remote_cursor_state_received_ = false;
+        }
 
-#if defined(__APPLE__) || defined(_WIN32)
         std::shared_ptr<std::vector<unsigned char>> native_snapshot;
         int native_snapshot_width = 0;
         int native_snapshot_height = 0;
         bool needs_native_snapshot = false;
         {
           std::lock_guard<std::mutex> lock(props->video_frame_mutex_);
-          needs_native_snapshot = !props->thumbnail_frame_ ||
-                                  props->thumbnail_frame_->empty();
+          needs_native_snapshot =
+              !props->thumbnail_frame_ || props->thumbnail_frame_->empty();
         }
         if (needs_native_snapshot) {
-#if defined(_WIN32)
-          auto* native_renderer =
-              runtime->windows_opengl_video_renderer_.get();
-#else
-          auto* native_renderer = runtime->mac_metal_video_renderer_.get();
-#endif
+          auto* native_renderer = runtime->video_renderer_.get();
           auto snapshot = std::make_shared<std::vector<unsigned char>>();
-          if (native_renderer && native_renderer->CopyLatestNv12(
-                                     remote_id, snapshot.get(),
-                                     &native_snapshot_width,
-                                     &native_snapshot_height)) {
+          if (native_renderer &&
+              native_renderer->CopyLatestNv12(remote_id, snapshot.get(),
+                                              &native_snapshot_width,
+                                              &native_snapshot_height)) {
             native_snapshot = std::move(snapshot);
           }
         }
-#endif
         {
           std::lock_guard<std::mutex> lock(props->video_frame_mutex_);
           props->front_frame_.reset();
           props->back_frame_.reset();
-#if defined(__APPLE__) || defined(_WIN32)
           if (native_snapshot &&
               (!props->thumbnail_frame_ || props->thumbnail_frame_->empty())) {
             props->thumbnail_frame_ = std::move(native_snapshot);
             props->thumbnail_width_ = native_snapshot_width;
             props->thumbnail_height_ = native_snapshot_height;
           }
-#endif
           props->video_width_ = 0;
           props->video_height_ = 0;
           props->video_size_ = 0;
           props->render_rect_dirty_ = true;
           props->stream_cleanup_pending_ = true;
         }
-#if defined(__APPLE__) || defined(_WIN32)
-#if defined(_WIN32)
-        auto* native_renderer = runtime->windows_opengl_video_renderer_.get();
-#else
-        auto* native_renderer = runtime->mac_metal_video_renderer_.get();
-#endif
+        auto* native_renderer = runtime->video_renderer_.get();
         if (native_renderer) {
           native_renderer->DiscardStream(remote_id);
-          runtime->video_frame_dirty_.store(true,
-                                            std::memory_order_release);
+          runtime->video_frame_dirty_.store(true, std::memory_order_release);
         }
-#endif
 
         runtime->focus_on_stream_window_ = false;
 

src/gui/runtime/peer_media_callbacks.cpp

@@ -1,36 +1,26 @@
-#include "runtime/peer_event_handler.h"
-
+#include <chrono>
 #include <cstring>
 #include <memory>
 #include <mutex>
 #include <string>
 #include <vector>
 
+#include "platform/video_renderer.h"
 #include "runtime/gui_runtime.h"
-#if defined(__APPLE__) || defined(_WIN32)
-#include <chrono>
-
-#if defined(_WIN32)
-#include "platform/windows_opengl_video_renderer.h"
-#else
-#include "platform/metal_video_renderer.h"
-#endif
-#endif
+#include "runtime/peer_event_handler.h"
 
 namespace crossdesk {
-#if defined(__APPLE__) || defined(_WIN32)
 namespace {
 
 constexpr auto kBackgroundSnapshotInterval = std::chrono::seconds(1);
 
 }  // namespace
-#endif
 
 void PeerEventHandler::OnReceiveVideoBuffer(
-    const XVideoFrame *video_frame, const char *user_id, size_t user_id_size,
-    const char *src_id, size_t src_id_size, void *user_data) {
-  auto *handler = static_cast<PeerEventHandler *>(user_data);
-  GuiRuntime *runtime = handler ? &handler->owner_ : nullptr;
+    const XVideoFrame* video_frame, const char* user_id, size_t user_id_size,
+    const char* src_id, size_t src_id_size, void* user_data) {
+  auto* handler = static_cast<PeerEventHandler*>(user_data);
+  GuiRuntime* runtime = handler ? &handler->owner_ : nullptr;
   if (!runtime) {
     return;
   }
@@ -41,32 +31,20 @@ void PeerEventHandler::OnReceiveVideoBuffer(
       runtime->remote_sessions_.end()) {
     return;
   }
-  GuiRuntime::RemoteSession *props =
+  GuiRuntime::RemoteSession* props =
       runtime->remote_sessions_.find(remote_id)->second.get();
 
   if (props->connection_established_) {
-#if defined(__APPLE__) || defined(_WIN32)
     bool background_snapshot_only = false;
-#if defined(_WIN32)
-    auto* native_renderer = runtime->windows_opengl_video_renderer_.get();
-    using NativeVideoRenderer = WindowsOpenGlVideoRenderer;
-#else
-    auto* native_renderer = runtime->mac_metal_video_renderer_.get();
-    using NativeVideoRenderer = MacMetalVideoRenderer;
-#endif
-    if (native_renderer && native_renderer->IsReady()
-#if defined(__APPLE__)
-        && native_renderer->IsAttached()
-#endif
-    ) {
+    auto* native_renderer = runtime->video_renderer_.get();
+    if (native_renderer && native_renderer->IsActive()) {
       const auto submit_result = native_renderer->SubmitNv12(
           remote_id, reinterpret_cast<const uint8_t*>(video_frame->data),
           video_frame->size, video_frame->width, video_frame->height);
-      if (submit_result == NativeVideoRenderer::SubmitResult::submitted) {
+      if (submit_result == VideoRenderer::SubmitResult::submitted) {
         std::lock_guard<std::mutex> lock(props->video_frame_mutex_);
-        const bool size_changed =
-            (props->video_width_ != video_frame->width) ||
-            (props->video_height_ != video_frame->height);
+        const bool size_changed = (props->video_width_ != video_frame->width) ||
+                                  (props->video_height_ != video_frame->height);
         if (size_changed) {
           props->render_rect_dirty_ = true;
         }
@@ -86,22 +64,19 @@ void PeerEventHandler::OnReceiveVideoBuffer(
         runtime->video_frame_dirty_.store(true, std::memory_order_release);
         return;
       }
-      if (submit_result == NativeVideoRenderer::SubmitResult::dropped ||
-          submit_result == NativeVideoRenderer::SubmitResult::failed) {
+      if (submit_result == VideoRenderer::SubmitResult::dropped ||
+          submit_result == VideoRenderer::SubmitResult::failed) {
         // Keep presenting the last native frame. A later decoded frame can
         // reuse the renderer without changing ownership mid-window.
         props->streaming_ = true;
         return;
       }
-      if (submit_result ==
-          NativeVideoRenderer::SubmitResult::not_selected) {
+      if (submit_result == VideoRenderer::SubmitResult::not_selected) {
         background_snapshot_only = true;
       }
     }
-#endif
     {
       std::lock_guard<std::mutex> lock(props->video_frame_mutex_);
-#if defined(__APPLE__) || defined(_WIN32)
       const auto now = std::chrono::steady_clock::now();
       if (background_snapshot_only && props->thumbnail_frame_ &&
           !props->thumbnail_frame_->empty() &&
@@ -112,7 +87,6 @@ void PeerEventHandler::OnReceiveVideoBuffer(
         props->streaming_ = true;
         return;
       }
-#endif
 
       // Allocate a third buffer only while the UI still owns the old snapshot.
       if (!props->back_frame_ || props->back_frame_.use_count() != 1) {
@@ -137,32 +111,28 @@ void PeerEventHandler::OnReceiveVideoBuffer(
       props->video_size_ = video_frame->size;
 
       props->front_frame_.swap(props->back_frame_);
-#if defined(__APPLE__) || defined(_WIN32)
       props->thumbnail_frame_ = props->front_frame_;
       props->thumbnail_width_ = video_frame->width;
       props->thumbnail_height_ = video_frame->height;
       if (background_snapshot_only) {
         props->background_snapshot_time_ = now;
       }
-#endif
       ++props->video_frame_sequence_;
     }
 
     props->streaming_ = true;
-#if defined(__APPLE__) || defined(_WIN32)
     if (background_snapshot_only) {
       return;
     }
-#endif
     runtime->video_frame_dirty_.store(true, std::memory_order_release);
   }
 }
 
 void PeerEventHandler::OnReceiveAudioBuffer(
-    const char *data, size_t size, const char *user_id, size_t user_id_size,
-    const char *src_id, size_t src_id_size, void *user_data) {
-  auto *handler = static_cast<PeerEventHandler *>(user_data);
-  GuiRuntime *runtime = handler ? &handler->owner_ : nullptr;
+    const char* data, size_t size, const char* user_id, size_t user_id_size,
+    const char* src_id, size_t src_id_size, void* user_data) {
+  auto* handler = static_cast<PeerEventHandler*>(user_data);
+  GuiRuntime* runtime = handler ? &handler->owner_ : nullptr;
   if (!runtime) {
     return;
   }
@@ -172,4 +142,4 @@ void PeerEventHandler::OnReceiveAudioBuffer(
   runtime->devices_.PushAudio(data, size);
 }
 
-} // namespace crossdesk
+}  // namespace crossdesk

src/gui/runtime/remote_session.h

@@ -13,6 +13,7 @@
 #include <string>
 #include <vector>
 
+#include "device_controller.h"
 #include "display_info.h"
 #include "minirtc.h"
 
@@ -110,14 +111,12 @@ struct RemoteSession {
   std::mutex video_frame_mutex_;
   std::shared_ptr<std::vector<unsigned char>> front_frame_;
   std::shared_ptr<std::vector<unsigned char>> back_frame_;
-#if defined(__APPLE__) || defined(_WIN32)
   // Retains the most recent background CPU frame across disconnect cleanup
   // so closing an unselected tab can still update its recent-item thumbnail.
   std::shared_ptr<std::vector<unsigned char>> thumbnail_frame_;
   int thumbnail_width_ = 0;
   int thumbnail_height_ = 0;
   std::chrono::steady_clock::time_point background_snapshot_time_;
-#endif
   bool render_rect_dirty_ = false;
   bool stream_cleanup_pending_ = false;
   float mouse_pos_x_ = 0;
@@ -150,6 +149,12 @@ struct RemoteSession {
   bool remote_service_available_ = false;
   std::string remote_interactive_stage_;
   std::vector<DisplayInfo> display_info_list_;
+  // Cursor snapshots arrive on the transport callback thread and are applied
+  // by the Slint UI thread. Keep the snapshot atomic as a unit so visibility
+  // and shape cannot briefly come from different protocol messages.
+  std::mutex remote_cursor_state_mutex_;
+  CursorState remote_cursor_state_{};
+  bool remote_cursor_state_received_ = false;
   // Shared by minirtc callbacks, Slint rendering and SDL audio callbacks.
   std::atomic<ConnectionStatus> connection_status_ = ConnectionStatus::Closed;
   TraversalMode traversal_mode_ = TraversalMode::UnknownMode;

src/gui/runtime/runtime_state.h

@@ -140,8 +140,6 @@ struct UserSettingsState {
   bool enable_autostart_last_ = false;
   bool enable_daemon_ = false;
   bool enable_daemon_last_ = false;
-  bool enable_minimize_to_tray_ = false;
-  bool enable_minimize_to_tray_last_ = false;
   char file_transfer_save_path_buf_[512] = "";
   std::string file_transfer_save_path_last_;
   char signal_server_ip_self_[256] = "";

src/gui/ui/main_window.slint

@@ -46,7 +46,6 @@ export global UiStrings {
     in-out property <string> self-hosted: "Self-hosted server";
     in-out property <string> autostart: "Start with system";
     in-out property <string> daemon: "Run in background";
-    in-out property <string> minimize-to-tray: "Minimize to tray";
     in-out property <string> file-save-path: "File save path";
     in-out property <string> default-desktop: "Desktop";
     in-out property <string> server-host: "Server host";
@@ -242,7 +241,6 @@ export component MainWindow inherits Window {
     in-out property <bool> self-hosted-enabled: false;
     in-out property <bool> autostart-enabled: false;
     in-out property <bool> daemon-enabled: false;
-    in-out property <bool> minimize-to-tray-enabled: false;
     in-out property <string> file-save-path: "";
     in-out property <string> server-host: "";
     in-out property <string> server-port: "";
@@ -1488,11 +1486,6 @@ export component MainWindow inherits Window {
                         Text { x: 8px; y: 3px; width: root.compact-language ? 145px : 212px; height: 24px; text: UiStrings.daemon; font-size: ImGuiFontStyle.body; overflow: elide; vertical-alignment: center; }
                         ImGuiCheckBox { x: root.compact-language ? 157px : 224px; y: 3px; checked <=> root.daemon-enabled; enabled: !root.settings-session-active; }
                     }
-                    Rectangle {
-                        height: 30px;
-                        Text { x: 8px; y: 3px; width: root.compact-language ? 145px : 212px; height: 24px; text: UiStrings.minimize-to-tray; font-size: ImGuiFontStyle.body; overflow: elide; vertical-alignment: center; }
-                        ImGuiCheckBox { x: root.compact-language ? 157px : 224px; y: 3px; checked <=> root.minimize-to-tray-enabled; enabled: !root.settings-session-active; }
-                    }
                     Rectangle {
                         height: 30px;
                         Text { x: 8px; y: 3px; width: root.compact-language ? 94px : 154px; height: 24px; text: UiStrings.file-save-path; font-size: ImGuiFontStyle.body; overflow: elide; vertical-alignment: center; }

src/gui/ui/stream_window.slint

@@ -133,6 +133,9 @@ export component StreamWindow inherits Window {
     in property <[string]> displays;
     in-out property <int> selected-display: 0;
     in property <bool> mouse-control-enabled: true;
+    // Numeric values mirror crossdesk::RemoteCursorShape and Slint's MouseCursor.
+    in property <bool> remote-cursor-active: false;
+    in property <int> remote-cursor-shape: 0;
     in property <bool> audio-enabled: true;
     in property <bool> srtp-enabled: false;
     in property <bool> fullscreen-enabled: false;
@@ -172,6 +175,10 @@ export component StreamWindow inherits Window {
     private property <bool> display-menu-animation-enabled: false;
     private property <float> display-menu-progress: 0.0;
     private property <bool> shortcut-menu-open: false;
+    // A popup can remove itself from the scene in its clicked callback before
+    // the video input layer observes the same pointer release. Remember that
+    // the press belonged to local UI so that release cannot reach the peer.
+    private property <bool> suppress-next-remote-pointer-release: false;
     private property <bool> control-docked-left: true;
     private property <bool> control-dragging: false;
     private property <length> control-drag-x: 0px;
@@ -547,6 +554,36 @@ export component StreamWindow inherits Window {
                     accept
                 }
                 pointer := TouchArea {
+                    mouse-cursor: !root.remote-cursor-active ? MouseCursor.default
+                        : root.remote-cursor-shape == 1 ? MouseCursor.none
+                        : root.remote-cursor-shape == 2 ? MouseCursor.help
+                        : root.remote-cursor-shape == 3 ? MouseCursor.pointer
+                        : root.remote-cursor-shape == 4 ? MouseCursor.progress
+                        : root.remote-cursor-shape == 5 ? MouseCursor.wait
+                        : root.remote-cursor-shape == 6 ? MouseCursor.crosshair
+                        : root.remote-cursor-shape == 7 ? MouseCursor.text
+                        : root.remote-cursor-shape == 8 ? MouseCursor.alias
+                        : root.remote-cursor-shape == 9 ? MouseCursor.copy
+                        : root.remote-cursor-shape == 10 ? MouseCursor.move
+                        : root.remote-cursor-shape == 11 ? MouseCursor.no-drop
+                        : root.remote-cursor-shape == 12 ? MouseCursor.not-allowed
+                        : root.remote-cursor-shape == 13 ? MouseCursor.grab
+                        : root.remote-cursor-shape == 14 ? MouseCursor.grabbing
+                        : root.remote-cursor-shape == 15 ? MouseCursor.col-resize
+                        : root.remote-cursor-shape == 16 ? MouseCursor.row-resize
+                        : root.remote-cursor-shape == 17 ? MouseCursor.n-resize
+                        : root.remote-cursor-shape == 18 ? MouseCursor.e-resize
+                        : root.remote-cursor-shape == 19 ? MouseCursor.s-resize
+                        : root.remote-cursor-shape == 20 ? MouseCursor.w-resize
+                        : root.remote-cursor-shape == 21 ? MouseCursor.ne-resize
+                        : root.remote-cursor-shape == 22 ? MouseCursor.nw-resize
+                        : root.remote-cursor-shape == 23 ? MouseCursor.se-resize
+                        : root.remote-cursor-shape == 24 ? MouseCursor.sw-resize
+                        : root.remote-cursor-shape == 25 ? MouseCursor.ew-resize
+                        : root.remote-cursor-shape == 26 ? MouseCursor.ns-resize
+                        : root.remote-cursor-shape == 27 ? MouseCursor.nesw-resize
+                        : root.remote-cursor-shape == 28 ? MouseCursor.nwse-resize
+                        : MouseCursor.default;
                     pointer-event(event) => {
                         let over-control = self.mouse-x >= control.x
                             && self.mouse-x <= control.x + control.width
@@ -554,7 +591,14 @@ export component StreamWindow inherits Window {
                             && self.mouse-y <= control.y + control.height;
                         let over-local-ui = root.is-local-control-area(
                             self.mouse-x, self.mouse-y);
+                        let suppress-remote-release =
+                            root.suppress-next-remote-pointer-release
+                            && (event.kind == PointerEventKind.up
+                                || event.kind == PointerEventKind.cancel);
                         if event.kind == PointerEventKind.down && !over-local-ui {
+                            // Discard a stale marker if a popup consumed the
+                            // whole previous gesture, including its release.
+                            root.suppress-next-remote-pointer-release = false;
                             input-focus.focus();
                         }
                         if event.kind == PointerEventKind.down
@@ -568,9 +612,13 @@ export component StreamWindow inherits Window {
                         // The control bar overlays the remote video. Events in
                         // it and its attached menus (including padding and gaps)
                         // are local UI input and must never reach the peer.
-                        } else if !root.control-dragging && !over-local-ui {
+                        } else if !root.control-dragging && !over-local-ui
+                            && !suppress-remote-release {
                             root.pointer-input(event.button, event.kind, self.mouse-x, self.mouse-y);
                         }
+                        if suppress-remote-release {
+                            root.suppress-next-remote-pointer-release = false;
+                        }
                     }
                     moved => {
                         if root.control-dragging {
@@ -871,6 +919,11 @@ export component StreamWindow inherits Window {
                 // hover stable while still consuming padding, gaps and scroll
                 // events locally instead of forwarding them to the peer.
                 display-touch := TouchArea {
+                    pointer-event(event) => {
+                        if event.kind == PointerEventKind.down {
+                            root.suppress-next-remote-pointer-release = true;
+                        }
+                    }
                     clicked => {
                         let index = floor((self.mouse-y - 4px) / 30px);
                         let row-y = self.mouse-y - 4px - index * 30px;
@@ -896,7 +949,14 @@ export component StreamWindow inherits Window {
                     for shortcut in ["Ctrl+Alt+Del", "Win+L"]: Rectangle {
                         height: 29px; background: shortcut-touch.has-hover ? #e8eef9 : transparent;
                         Text { x: 8px; text: shortcut; color: #30343b; font-size: ImGuiFontStyle.body; vertical-alignment: center; }
-                        shortcut-touch := TouchArea { clicked => { root.send-shortcut(shortcut); root.shortcut-menu-open = false; } }
+                        shortcut-touch := TouchArea {
+                            pointer-event(event) => {
+                                if event.kind == PointerEventKind.down {
+                                    root.suppress-next-remote-pointer-release = true;
+                                }
+                            }
+                            clicked => { root.send-shortcut(shortcut); root.shortcut-menu-open = false; }
+                        }
                     }
                 }
             }

src/gui/ui/ui_localization.h

@@ -57,8 +57,6 @@ inline int ApplyMainWindowStrings(
       Text(localization::self_hosted_server_config[language]));
   strings.set_autostart(Text(localization::enable_autostart[language]));
   strings.set_daemon(Text(localization::enable_daemon[language]));
-  strings.set_minimize_to_tray(
-      Text(localization::minimize_to_tray[language]));
   strings.set_file_save_path(
       Text(localization::file_transfer_save_path[language]));
   strings.set_default_desktop(Text(localization::default_desktop[language]));

src/gui/views/toolbars/title_bar.cpp

@@ -299,8 +299,11 @@ int GuiApplication::TitleBar(bool main_window) {
   }
 
   if (close_button_clicked) {
-    const bool minimized_to_tray = main_window && MinimizeMainWindowToTray();
-    if (!minimized_to_tray) {
+    if (main_window) {
+      if (!MinimizeMainWindowToTray()) {
+        SDL_HideWindow(main_window_);
+      }
+    } else {
       SDL_Event event;
       event.type = SDL_EVENT_QUIT;
       SDL_PushEvent(&event);

src/gui/views/windows/main_settings_window.cpp

@@ -355,26 +355,6 @@ int GuiApplication::SettingWindow() {
 
       ImGui::Separator();
 
-      {
-        settings_items_offset += settings_items_padding;
-        ImGui::SetCursorPosY(settings_items_offset);
-        ImGui::AlignTextToFramePadding();
-        ImGui::Text("%s",
-                    localization::minimize_to_tray[localization_language_index_]
-                        .c_str());
-        ImGui::SameLine();
-        if (ConfigCenter::LANGUAGE::CHINESE == localization_language_) {
-          ImGui::SetCursorPosX(title_bar_button_width_ * 4.275f);
-        } else {
-          ImGui::SetCursorPosX(title_bar_button_width_ * 5.955f);
-        }
-
-        ImGui::Checkbox("##enable_minimize_to_tray_",
-                        &enable_minimize_to_tray_);
-      }
-
-      ImGui::Separator();
-
       {
         settings_items_offset += settings_items_padding;
         ImGui::SetCursorPosY(settings_items_offset);
@@ -618,13 +598,6 @@ int GuiApplication::SettingWindow() {
         }
         enable_daemon_last_ = enable_daemon_;
 
-        if (enable_minimize_to_tray_) {
-          config_center_->SetMinimizeToTray(true);
-        } else {
-          config_center_->SetMinimizeToTray(false);
-        }
-        enable_minimize_to_tray_last_ = enable_minimize_to_tray_;
-
         // File transfer save path
         config_center_->SetFileTransferSavePath(file_transfer_save_path_buf_);
         file_transfer_save_path_last_ = file_transfer_save_path_buf_;

src/screen_capturer/linux/screen_capturer_wayland.cpp

@@ -12,8 +12,10 @@
 #include <cstring>
 #include <thread>
 
+#include "linux_cursor_shape.h"
 #include "platform.h"
 #include "rd_log.h"
+#include "shared_cursor_state.h"
 #include "wayland_portal_shared.h"
 
 namespace crossdesk {
@@ -35,7 +37,8 @@ constexpr auto kPipeWireCloseSettleDelay = std::chrono::milliseconds(200);
 
 }  // namespace
 
-ScreenCapturerWayland::ScreenCapturerWayland() {}
+ScreenCapturerWayland::ScreenCapturerWayland()
+    : cursor_theme_matcher_(std::make_unique<LinuxCursorThemeMatcher>()) {}
 
 ScreenCapturerWayland::~ScreenCapturerWayland() { Destroy(); }
 
@@ -66,6 +69,10 @@ int ScreenCapturerWayland::Init(const int fps, cb_desktop_data cb) {
   callback_ = cb;
   pointer_granted_ = false;
   shared_session_registered_ = false;
+  cursor_metadata_enabled_ = false;
+  cursor_metadata_seen_ = false;
+  cursor_metadata_missing_buffers_ = 0;
+  ClearSharedCursorState();
   display_info_list_.clear();
   display_info_list_.push_back(
       DisplayInfo(display_name_, 0, 0, kFallbackWidth, kFallbackHeight));
@@ -100,6 +107,10 @@ int ScreenCapturerWayland::Start(bool show_cursor) {
   }
 
   show_cursor_ = show_cursor;
+  cursor_metadata_enabled_ = false;
+  cursor_metadata_seen_ = false;
+  cursor_metadata_missing_buffers_ = 0;
+  ClearSharedCursorState();
   paused_ = false;
   pipewire_node_id_ = 0;
   UpdateDisplayGeometry(
@@ -119,6 +130,10 @@ int ScreenCapturerWayland::Stop() {
     thread_.join();
   }
   pipewire_node_id_ = 0;
+  cursor_metadata_enabled_ = false;
+  cursor_metadata_seen_ = false;
+  cursor_metadata_missing_buffers_ = 0;
+  ClearSharedCursorState();
   UpdateDisplayGeometry(
       logical_width_ > 0 ? logical_width_ : kFallbackWidth,
       logical_height_ > 0 ? logical_height_ : kFallbackHeight);

src/screen_capturer/linux/screen_capturer_wayland.h

@@ -15,6 +15,7 @@ struct pw_thread_loop;
 
 #include <atomic>
 #include <cstdint>
+#include <memory>
 #include <string>
 #include <thread>
 #include <vector>
@@ -23,6 +24,8 @@ struct pw_thread_loop;
 
 namespace crossdesk {
 
+class LinuxCursorThemeMatcher;
+
 class ScreenCapturerWayland : public ScreenCapturer {
  public:
   enum class PipeWireConnectMode { kTargetObject, kNodeId, kAny };
@@ -51,6 +54,7 @@ class ScreenCapturerWayland : public ScreenCapturer {
   bool CreatePortalSession();
   bool SelectPortalDevices();
   bool SelectPortalSource();
+  bool GetAvailableCursorModes(uint32_t* modes) const;
   bool StartPortalSession();
   bool EnsurePipeWireRuntimeAvailable() const;
   bool OpenPipeWireRemote();
@@ -95,6 +99,9 @@ class ScreenCapturerWayland : public ScreenCapturer {
   bool pipewire_thread_loop_started_ = false;
   bool pointer_granted_ = false;
   bool shared_session_registered_ = false;
+  bool cursor_metadata_enabled_ = false;
+  bool cursor_metadata_seen_ = false;
+  uint32_t cursor_metadata_missing_buffers_ = 0;
   bool portal_has_logical_size_ = false;
   uint32_t spa_video_format_ = 0;
   int frame_width_ = 0;
@@ -104,6 +111,7 @@ class ScreenCapturerWayland : public ScreenCapturer {
   int portal_stream_height_ = 0;
   int logical_width_ = 0;
   int logical_height_ = 0;
+  std::unique_ptr<LinuxCursorThemeMatcher> cursor_theme_matcher_;
 
   std::vector<uint8_t> y_plane_;
   std::vector<uint8_t> uv_plane_;

src/screen_capturer/linux/screen_capturer_wayland_pipewire.cpp

@@ -17,7 +17,9 @@
 
 #include "display_stream_id.h"
 #include "libyuv.h"
+#include "linux_cursor_shape.h"
 #include "rd_log.h"
+#include "shared_cursor_state.h"
 
 namespace crossdesk {
 
@@ -199,6 +201,145 @@ int64_t NowMs() {
       .count();
 }
 
+constexpr uint32_t kMaxCursorDimension = 512;
+constexpr int kCursorMetadataSize =
+    static_cast<int>(sizeof(spa_meta_cursor) + sizeof(spa_meta_bitmap) +
+                     64u + kMaxCursorDimension * kMaxCursorDimension * 4u);
+
+enum class CursorBitmapResult { kNoUpdate, kInvisible, kImage, kInvalid };
+
+CursorBitmapResult ReadCursorBitmap(const spa_meta& metadata,
+                                    const spa_meta_cursor& cursor,
+                                    std::vector<uint32_t>* argb,
+                                    LinuxCursorImageView* view) {
+  if (!metadata.data || !argb || !view || cursor.bitmap_offset == 0) {
+    return CursorBitmapResult::kNoUpdate;
+  }
+
+  const size_t bitmap_offset = cursor.bitmap_offset;
+  if (bitmap_offset > metadata.size ||
+      metadata.size - bitmap_offset < sizeof(spa_meta_bitmap)) {
+    return CursorBitmapResult::kInvalid;
+  }
+
+  const auto* metadata_bytes = static_cast<const uint8_t*>(metadata.data);
+  const auto* bitmap = reinterpret_cast<const spa_meta_bitmap*>(
+      metadata_bytes + bitmap_offset);
+  if (bitmap->format == 0) {
+    return CursorBitmapResult::kNoUpdate;
+  }
+  if (bitmap->offset == 0) {
+    return CursorBitmapResult::kInvisible;
+  }
+
+  const uint32_t width = bitmap->size.width;
+  const uint32_t height = bitmap->size.height;
+  if (width == 0 || height == 0 || width > kMaxCursorDimension ||
+      height > kMaxCursorDimension || bitmap->stride < 0 ||
+      static_cast<uint32_t>(bitmap->stride) < width * 4u) {
+    return CursorBitmapResult::kInvalid;
+  }
+
+  const size_t pixel_offset = bitmap_offset + bitmap->offset;
+  const size_t required_size =
+      static_cast<size_t>(bitmap->stride) * (height - 1u) + width * 4u;
+  if (pixel_offset > metadata.size ||
+      required_size > metadata.size - pixel_offset) {
+    return CursorBitmapResult::kInvalid;
+  }
+
+  enum class ChannelOrder { kBgra, kRgba, kArgb, kAbgr, kBgrx, kRgbx };
+  ChannelOrder channel_order;
+  switch (bitmap->format) {
+    case SPA_VIDEO_FORMAT_BGRA:
+      channel_order = ChannelOrder::kBgra;
+      break;
+    case SPA_VIDEO_FORMAT_RGBA:
+      channel_order = ChannelOrder::kRgba;
+      break;
+    case SPA_VIDEO_FORMAT_ARGB:
+      channel_order = ChannelOrder::kArgb;
+      break;
+    case SPA_VIDEO_FORMAT_ABGR:
+      channel_order = ChannelOrder::kAbgr;
+      break;
+    case SPA_VIDEO_FORMAT_BGRx:
+      channel_order = ChannelOrder::kBgrx;
+      break;
+    case SPA_VIDEO_FORMAT_RGBx:
+      channel_order = ChannelOrder::kRgbx;
+      break;
+    default:
+      return CursorBitmapResult::kInvalid;
+  }
+
+  argb->resize(static_cast<size_t>(width) * height);
+  const uint8_t* pixels = metadata_bytes + pixel_offset;
+  bool has_visible_pixel = false;
+  for (uint32_t y = 0; y < height; ++y) {
+    const uint8_t* row = pixels + static_cast<size_t>(y) * bitmap->stride;
+    for (uint32_t x = 0; x < width; ++x) {
+      const uint8_t* pixel = row + static_cast<size_t>(x) * 4u;
+      uint8_t red = 0;
+      uint8_t green = 0;
+      uint8_t blue = 0;
+      uint8_t alpha = 0xff;
+      switch (channel_order) {
+        case ChannelOrder::kBgra:
+          blue = pixel[0];
+          green = pixel[1];
+          red = pixel[2];
+          alpha = pixel[3];
+          break;
+        case ChannelOrder::kRgba:
+          red = pixel[0];
+          green = pixel[1];
+          blue = pixel[2];
+          alpha = pixel[3];
+          break;
+        case ChannelOrder::kArgb:
+          alpha = pixel[0];
+          red = pixel[1];
+          green = pixel[2];
+          blue = pixel[3];
+          break;
+        case ChannelOrder::kAbgr:
+          alpha = pixel[0];
+          blue = pixel[1];
+          green = pixel[2];
+          red = pixel[3];
+          break;
+        case ChannelOrder::kBgrx:
+          blue = pixel[0];
+          green = pixel[1];
+          red = pixel[2];
+          break;
+        case ChannelOrder::kRgbx:
+          red = pixel[0];
+          green = pixel[1];
+          blue = pixel[2];
+          break;
+      }
+      has_visible_pixel = has_visible_pixel || alpha != 0;
+      (*argb)[static_cast<size_t>(y) * width + x] =
+          (static_cast<uint32_t>(alpha) << 24U) |
+          (static_cast<uint32_t>(red) << 16U) |
+          (static_cast<uint32_t>(green) << 8U) | blue;
+    }
+  }
+
+  if (!has_visible_pixel) {
+    return CursorBitmapResult::kInvisible;
+  }
+
+  view->width = width;
+  view->height = height;
+  view->xhot = static_cast<uint32_t>(std::max(0, cursor.hotspot.x));
+  view->yhot = static_cast<uint32_t>(std::max(0, cursor.hotspot.y));
+  view->argb = argb->data();
+  return CursorBitmapResult::kImage;
+}
+
 double SnapLikelyFractionalScale(double observed_scale) {
   static constexpr double kCandidates[] = {
       1.0, 1.25, 1.3333333333, 1.5, 1.6666666667, 1.75, 2.0, 2.25, 2.5, 3.0};
@@ -500,7 +641,7 @@ bool ScreenCapturerWayland::SetupPipeWireStream(bool relaxed_connect,
 
       uint8_t buffer[1024];
       spa_pod_builder builder = SPA_POD_BUILDER_INIT(buffer, sizeof(buffer));
-      const spa_pod* params[2];
+      const spa_pod* params[3];
       uint32_t param_count = 0;
 
       params[param_count++] =
@@ -525,10 +666,29 @@ bool ScreenCapturerWayland::SetupPipeWireStream(bool relaxed_connect,
               CROSSDESK_SPA_PARAM_META_SIZE,
               SPA_POD_Int(sizeof(struct spa_meta_header))));
 
+      if (self->cursor_metadata_enabled_) {
+        params[param_count++] =
+            reinterpret_cast<const spa_pod*>(spa_pod_builder_add_object(
+                &builder, SPA_TYPE_OBJECT_ParamMeta, SPA_PARAM_Meta,
+                CROSSDESK_SPA_PARAM_META_TYPE, SPA_POD_Id(SPA_META_Cursor),
+                CROSSDESK_SPA_PARAM_META_SIZE,
+                SPA_POD_CHOICE_RANGE_Int(
+                    kCursorMetadataSize,
+                    static_cast<int>(sizeof(struct spa_meta_cursor)),
+                    kCursorMetadataSize)));
+      }
+
       if (self->pw_stream_) {
         const PipeWireDynamicApi* pipewire = GetPipeWireApi();
         if (pipewire) {
-          pipewire->stream_update_params(self->pw_stream_, params, param_count);
+          const int update_result = pipewire->stream_update_params(
+              self->pw_stream_, params, param_count);
+          LOG_INFO(
+              "PipeWire buffer parameters updated: cursor_metadata={}, "
+              "cursor_meta_max_size={}, result={}",
+              self->cursor_metadata_enabled_,
+              self->cursor_metadata_enabled_ ? kCursorMetadataSize : 0,
+              update_result);
         }
       }
       self->pipewire_format_ready_.store(true);
@@ -786,6 +946,57 @@ void ScreenCapturerWayland::HandlePipeWireBuffer() {
     return;
   }
 
+  if (cursor_metadata_enabled_) {
+    spa_meta* cursor_metadata =
+        spa_buffer_find_meta(spa_buffer, SPA_META_Cursor);
+    if (!cursor_metadata) {
+      ++cursor_metadata_missing_buffers_;
+      if (cursor_metadata_missing_buffers_ == 120) {
+        LOG_WARN(
+            "PipeWire stream has not attached SPA_META_Cursor after 120 "
+            "buffers; cursor metadata negotiation was not accepted");
+      }
+    } else {
+      cursor_metadata_missing_buffers_ = 0;
+      if (!cursor_metadata_seen_) {
+        cursor_metadata_seen_ = true;
+        LOG_INFO("PipeWire cursor metadata attached, size={}",
+                 cursor_metadata->size);
+      }
+    }
+    if (cursor_metadata && cursor_metadata->data &&
+        cursor_metadata->size >= sizeof(spa_meta_cursor)) {
+      const auto* cursor =
+          static_cast<const spa_meta_cursor*>(cursor_metadata->data);
+      if (spa_meta_cursor_is_valid(cursor)) {
+        std::vector<uint32_t> cursor_argb;
+        LinuxCursorImageView cursor_view;
+        const CursorBitmapResult cursor_result = ReadCursorBitmap(
+            *cursor_metadata, *cursor, &cursor_argb, &cursor_view);
+        if (cursor_result == CursorBitmapResult::kInvisible) {
+          PublishSharedCursorState(false, RemoteCursorShape::none);
+          LOG_INFO("PipeWire cursor became invisible, id={}", cursor->id);
+        } else if (cursor_result == CursorBitmapResult::kImage) {
+          const RemoteCursorShape shape =
+              cursor_theme_matcher_
+                  ? cursor_theme_matcher_->Match(cursor_view)
+                  : RemoteCursorShape::default_cursor;
+          PublishSharedCursorState(true, shape);
+          LOG_INFO(
+              "PipeWire cursor shape update: id={}, size={}x{}, "
+              "hotspot=({},{}), shape={}",
+              cursor->id, cursor_view.width, cursor_view.height,
+              cursor_view.xhot, cursor_view.yhot, static_cast<int>(shape));
+        } else if (cursor_result == CursorBitmapResult::kInvalid) {
+          PublishSharedCursorState(true, RemoteCursorShape::default_cursor);
+          LOG_WARN("Using default shape for malformed PipeWire cursor "
+                   "metadata, id={}",
+                   cursor->id);
+        }
+      }
+    }
+  }
+
   const spa_data& data = spa_buffer->datas[0];
   if (!data.chunk) {
     requeue();

src/screen_capturer/linux/screen_capturer_wayland_portal.cpp

@@ -12,6 +12,7 @@
 #include <string>
 
 #include "rd_log.h"
+#include "shared_cursor_state.h"
 
 namespace crossdesk {
 
@@ -35,6 +36,7 @@ constexpr const char* kPortalSessionPathPrefix =
 constexpr uint32_t kScreenCastSourceMonitor = 1u;
 constexpr uint32_t kCursorModeHidden = 1u;
 constexpr uint32_t kCursorModeEmbedded = 2u;
+constexpr uint32_t kCursorModeMetadata = 4u;
 constexpr uint32_t kRemoteDesktopDevicePointer = 2u;
 
 std::string MakeToken(const char* prefix) {
@@ -482,6 +484,47 @@ bool ScreenCapturerWayland::SelectPortalSource() {
     return false;
   }
 
+  uint32_t available_cursor_modes = kCursorModeHidden | kCursorModeEmbedded;
+  if (!GetAvailableCursorModes(&available_cursor_modes)) {
+    LOG_WARN(
+        "Unable to query portal cursor modes; using embedded cursor fallback");
+  }
+
+  uint32_t cursor_mode = 0;
+  cursor_metadata_enabled_ = false;
+  if (!show_cursor_ && (available_cursor_modes & kCursorModeMetadata) != 0) {
+    cursor_mode = kCursorModeMetadata;
+    cursor_metadata_enabled_ = true;
+  } else if ((available_cursor_modes & kCursorModeEmbedded) != 0) {
+    cursor_mode = kCursorModeEmbedded;
+  } else if ((available_cursor_modes & kCursorModeMetadata) != 0) {
+    cursor_mode = kCursorModeMetadata;
+    cursor_metadata_enabled_ = true;
+  } else if ((available_cursor_modes & kCursorModeHidden) != 0) {
+    cursor_mode = kCursorModeHidden;
+  }
+
+  if (cursor_mode == 0) {
+    LOG_ERROR("Wayland portal reports no supported cursor mode");
+    return false;
+  }
+
+  if (cursor_mode == kCursorModeEmbedded) {
+    // When metadata is unavailable, embedding is the only way to preserve the
+    // exact Wayland cursor. Hide the controller-side cursor to avoid a double
+    // cursor over the video stream.
+    PublishSharedCursorState(false, RemoteCursorShape::none);
+  } else if (!cursor_metadata_enabled_) {
+    // A portal without metadata or embedded cursor support cannot expose the
+    // native Wayland shape. Keep a visible default cursor on the controller.
+    PublishSharedCursorState(true, RemoteCursorShape::default_cursor);
+  }
+
+  LOG_INFO("Wayland portal cursor mode: {}",
+           cursor_mode == kCursorModeMetadata
+               ? "metadata"
+               : (cursor_mode == kCursorModeEmbedded ? "embedded" : "hidden"));
+
   const char* session_handle = session_handle_.c_str();
   return SendPortalRequestAndHandleResponse(
       dbus_connection_, kPortalScreenCastInterface, "SelectSources",
@@ -496,9 +539,7 @@ bool ScreenCapturerWayland::SelectPortalSource() {
                                          &options);
         AppendDictEntryUint32(&options, "types", kScreenCastSourceMonitor);
         AppendDictEntryBool(&options, "multiple", false);
-        AppendDictEntryUint32(
-            &options, "cursor_mode",
-            show_cursor_ ? kCursorModeEmbedded : kCursorModeHidden);
+        AppendDictEntryUint32(&options, "cursor_mode", cursor_mode);
         AppendDictEntryString(&options, "handle_token",
                               MakeToken("crossdesk_req"));
         dbus_message_iter_close_container(&iter, &options);
@@ -515,6 +556,50 @@ bool ScreenCapturerWayland::SelectPortalSource() {
       });
 }
 
+bool ScreenCapturerWayland::GetAvailableCursorModes(uint32_t* modes) const {
+  if (!dbus_connection_ || !modes) {
+    return false;
+  }
+
+  DBusMessage* message = dbus_message_new_method_call(
+      kPortalBusName, kPortalObjectPath, "org.freedesktop.DBus.Properties",
+      "Get");
+  if (!message) {
+    return false;
+  }
+
+  const char* interface_name = kPortalScreenCastInterface;
+  const char* property_name = "AvailableCursorModes";
+  dbus_message_append_args(message, DBUS_TYPE_STRING, &interface_name,
+                           DBUS_TYPE_STRING, &property_name,
+                           DBUS_TYPE_INVALID);
+
+  DBusError error;
+  dbus_error_init(&error);
+  DBusMessage* reply = dbus_connection_send_with_reply_and_block(
+      dbus_connection_, message, -1, &error);
+  dbus_message_unref(message);
+  if (!reply) {
+    LogDbusError("Get AvailableCursorModes", &error);
+    dbus_error_free(&error);
+    return false;
+  }
+
+  DBusMessageIter iter;
+  bool parsed = false;
+  if (dbus_message_iter_init(reply, &iter) &&
+      dbus_message_iter_get_arg_type(&iter) == DBUS_TYPE_VARIANT) {
+    DBusMessageIter variant;
+    dbus_message_iter_recurse(&iter, &variant);
+    if (dbus_message_iter_get_arg_type(&variant) == DBUS_TYPE_UINT32) {
+      dbus_message_iter_get_basic(&variant, modes);
+      parsed = true;
+    }
+  }
+  dbus_message_unref(reply);
+  return parsed;
+}
+
 bool ScreenCapturerWayland::SelectPortalDevices() {
   if (!dbus_connection_ || session_handle_.empty()) {
     return false;

tests/display_popup_hover_state_test.cpp

@@ -1,139 +0,0 @@
-#include <filesystem>
-#include <fstream>
-#include <iostream>
-#include <sstream>
-#include <string>
-
-namespace {
-
-std::filesystem::path FindRepoRoot() {
-  std::filesystem::path current = std::filesystem::current_path();
-  while (!current.empty()) {
-    if (std::filesystem::exists(current / "xmake.lua") &&
-        std::filesystem::exists(current / "src/gui/ui/stream_window.slint")) {
-      return current;
-    }
-    current = current.parent_path();
-  }
-  return {};
-}
-
-std::string ReadFile(const std::filesystem::path& path) {
-  std::ifstream file(path, std::ios::binary);
-  if (!file) {
-    return {};
-  }
-  std::ostringstream stream;
-  stream << file.rdbuf();
-  return stream.str();
-}
-
-bool ExpectContains(const char* name, const std::string& value,
-                    const std::string& expected) {
-  if (value.find(expected) != std::string::npos) {
-    return true;
-  }
-  std::cerr << name << " missing expected text: " << expected << "\n";
-  return false;
-}
-
-bool ExpectNotContains(const char* name, const std::string& value,
-                       const std::string& unexpected) {
-  if (value.find(unexpected) == std::string::npos) {
-    return true;
-  }
-  std::cerr << name << " contains unexpected text: " << unexpected << "\n";
-  return false;
-}
-
-bool ExpectContainsAtLeast(const char* name, const std::string& value,
-                           const std::string& expected, size_t min_count) {
-  size_t count = 0;
-  size_t pos = 0;
-  while ((pos = value.find(expected, pos)) != std::string::npos) {
-    ++count;
-    pos += expected.size();
-  }
-  if (count >= min_count) {
-    return true;
-  }
-  std::cerr << name << " expected at least " << min_count
-            << " occurrences of: " << expected << ", found " << count << "\n";
-  return false;
-}
-
-}  // namespace
-
-int main() {
-  const std::filesystem::path repo_root = FindRepoRoot();
-  if (repo_root.empty()) {
-    std::cerr << "failed to locate repository root\n";
-    return 1;
-  }
-
-  const std::string stream =
-      ReadFile(repo_root / "src/gui/ui/stream_window.slint");
-  const std::string common = ReadFile(repo_root / "src/gui/ui/common.slint");
-  const std::string application =
-      ReadFile(repo_root / "src/gui/application/gui_application.cpp");
-
-  bool ok = true;
-  ok &= ExpectContains("stream_window.slint", stream,
-                       "private property <bool> display-menu-open: false;");
-  ok &= ExpectContains("stream_window.slint", stream,
-                       "root.shortcut-menu-open = false;");
-  ok &= ExpectContains("stream_window.slint", stream,
-                       "if root.display-menu-open: Rectangle");
-  ok &=
-      ExpectContains("stream_window.slint", stream, "display-touch.has-hover");
-  ok &= ExpectContains("stream_window.slint", stream,
-                       "root.switch-display(index)");
-  ok &= ExpectContains("stream_window.slint", stream,
-                       "if root.shortcut-menu-open: Rectangle");
-  ok &=
-      ExpectContains("stream_window.slint", stream, "shortcut-touch.has-hover");
-  ok &= ExpectContains("stream_window.slint", stream,
-                       "} else if !root.control-dragging && !over-control {");
-
-  ok &= ExpectContains("common.slint", common,
-                       "if touch.has-hover && root.tooltip != \"\": Rectangle");
-  ok &= ExpectContainsAtLeast("stream_window.slint", stream, "tooltip:", 9);
-  ok &= ExpectContains("stream_window.slint", stream,
-                       "tooltip: StreamStrings.select-display");
-  ok &= ExpectContains("stream_window.slint", stream,
-                       "tooltip: StreamStrings.send-shortcut");
-  ok &=
-      ExpectContains("stream_window.slint", stream,
-                     "root.mouse-control-enabled ? StreamStrings.release-mouse "
-                     ": StreamStrings.control-mouse");
-  ok &= ExpectContains(
-      "stream_window.slint", stream,
-      "root.audio-enabled ? StreamStrings.mute : StreamStrings.audio");
-  ok &= ExpectContains("stream_window.slint", stream,
-                       "tooltip: StreamStrings.select-file");
-  ok &= ExpectContains("stream_window.slint", stream,
-                       "root.stats-visible ? StreamStrings.hide-stats : "
-                       "StreamStrings.show-stats");
-  ok &=
-      ExpectContains("stream_window.slint", stream,
-                     "root.fullscreen-enabled ? StreamStrings.exit-fullscreen "
-                     ": StreamStrings.fullscreen");
-  ok &= ExpectContains("stream_window.slint", stream,
-                       "tooltip: StreamStrings.disconnect");
-  ok &= ExpectContains("stream_window.slint", stream,
-                       "root.control-expanded ? StreamStrings.collapse-control "
-                       ": StreamStrings.expand-control");
-
-  ok &=
-      ExpectContains("gui_application.cpp", application, "set_select_display(");
-  ok &= ExpectContains("gui_application.cpp", application, "set_show_stats(");
-  ok &=
-      ExpectContains("gui_application.cpp", application, "set_expand_control(");
-  ok &= ExpectContains("gui_application.cpp", application,
-                       "set_collapse_control(");
-  ok &= ExpectContains("gui_application.cpp", application,
-                       "(*ui_->stream)->global<ui::StreamStrings>()");
-  ok &=
-      ExpectNotContains("gui_application.cpp", application, "#include <imgui");
-  return ok ? 0 : 1;
-}

xmake/platform.lua

@@ -37,7 +37,7 @@ function setup_platform_settings()
         add_requires("libyuv")
         add_syslinks("pthread", "dl")
         add_links("asound", "X11", "Xext", "Xrender", "Xft", "Xtst",
-            "Xrandr", "Xfixes")
+            "Xrandr", "Xfixes", "Xcursor")
         add_existing_include_dirs({
             "/usr/include/freetype2",
             "/usr/local/include/freetype2"
@@ -84,7 +84,8 @@ function setup_platform_settings()
             add_ldflags("-Wl,-ld_classic")
         end
         add_cxflags("-Wno-unused-variable")
-        add_frameworks("Cocoa", "Metal", "QuartzCore", "IOSurface",
+        add_frameworks("Cocoa", "CoreGraphics", "Metal", "QuartzCore",
+            "IOSurface",
             "ScreenCaptureKit", "AVFoundation", "CoreMedia", "CoreVideo",
             "CoreAudio", "AudioToolbox")
     end

xmake/targets.lua

@@ -100,11 +100,6 @@ function setup_targets()
         add_includedirs("src/service/windows")
         add_files("tests/windows_sas_guard_test.cpp")
 
-    target("display_popup_hover_state_test")
-        set_kind("binary")
-        set_default(false)
-        add_files("tests/display_popup_hover_state_test.cpp")
-
     target("slint_ui_smoke_test")
         set_kind("binary")
         set_languages("c++20")
@@ -270,6 +265,7 @@ function setup_targets()
             "device_controller", "thumbnail", "version_checker", "tools")
         add_files("src/gui/render.cpp", "src/gui/application/gui_application.cpp",
             "src/gui/application/portable_service_integration.cpp",
+            "src/gui/rendering/*.cpp",
             "src/gui/runtime/*.cpp",
             "src/gui/features/devices/*.cpp", "src/gui/features/input/*.cpp",
             "src/gui/features/clipboard/*.cpp", "src/gui/features/file_transfer/*.cpp",
@@ -279,15 +275,19 @@ function setup_targets()
             add_cxxflags("/bigobj")
             add_links("opengl32")
             add_files("src/gui/platform/tray/win_tray.cpp",
-                "src/gui/platform/windows_opengl_video_renderer.cpp")
+                "src/gui/platform/opengl_video_renderer.cpp",
+                "src/gui/platform/video_renderer_factory_opengl.cpp")
             add_includedirs("src/service/windows", {public = true})
         elseif is_os("macosx") then
             add_files("src/gui/runtime/*.mm", "src/gui/platform/tray/*.mm",
                 "src/gui/platform/window_drag_mac.mm",
-                "src/gui/platform/metal_video_renderer.mm")
+                "src/gui/platform/metal_video_renderer.mm",
+                "src/gui/platform/video_renderer_factory_metal.mm")
         elseif is_os("linux") then
             add_links("GL")
-            add_files("src/gui/platform/tray/linux_tray.cpp")
+            add_files("src/gui/platform/tray/linux_tray.cpp",
+                "src/gui/platform/opengl_video_renderer.cpp",
+                "src/gui/platform/video_renderer_factory_opengl.cpp")
         end
 
     if is_os("windows") then