[fix] synchronize Linux Wayland cursor shapes

scripts/linux/package_deb.sh

@@ -158,7 +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/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

@@ -1796,6 +1796,7 @@ void GuiApplication::Tick() {
   SyncStreamKeyboardFocus();
 #endif
   devices_.UpdateInteractions();
+  ShareLocalCursorState();
 
   UpdateLocalization();
   SyncMainWindow();
@@ -1805,6 +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;
@@ -2364,6 +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();

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();
@@ -70,6 +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/runtime/connection_runtime.cpp

@@ -338,6 +338,11 @@ void GuiRuntime::ResetRemoteSessionResources(
     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/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

@@ -249,6 +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 =
@@ -313,6 +318,11 @@ 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;
+        }
 
         std::shared_ptr<std::vector<unsigned char>> native_snapshot;
         int native_snapshot_width = 0;

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"
 
@@ -148,6 +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/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;
@@ -551,6 +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

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(
+        AppendDictEntryUint32(&options, "cursor_mode", cursor_mode);
-            &options, "cursor_mode",
-            show_cursor_ ? kCursorModeEmbedded : kCursorModeHidden);
         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;

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