[client] imgui: ask display server to display cursors

client/src/app.c

@@ -661,6 +661,35 @@ static inline void mergeRect(struct Rect * dest, const struct Rect * a, const st
   dest->h = y2 - dest->y;
 }
 
+static inline LG_DSPointer mapImGuiCursor(ImGuiMouseCursor cursor)
+{
+  switch (cursor)
+  {
+    case ImGuiMouseCursor_None:
+      return LG_POINTER_NONE;
+    case ImGuiMouseCursor_Arrow:
+      return LG_POINTER_ARROW;
+    case ImGuiMouseCursor_TextInput:
+      return LG_POINTER_INPUT;
+    case ImGuiMouseCursor_ResizeAll:
+      return LG_POINTER_MOVE;
+    case ImGuiMouseCursor_ResizeNS:
+      return LG_POINTER_RESIZE_NS;
+    case ImGuiMouseCursor_ResizeEW:
+      return LG_POINTER_RESIZE_EW;
+    case ImGuiMouseCursor_ResizeNESW:
+      return LG_POINTER_RESIZE_NESW;
+    case ImGuiMouseCursor_ResizeNWSE:
+      return LG_POINTER_RESIZE_NWSE;
+    case ImGuiMouseCursor_Hand:
+      return LG_POINTER_HAND;
+    case ImGuiMouseCursor_NotAllowed:
+      return LG_POINTER_NOT_ALLOWED;
+    default:
+      return LG_POINTER_ARROW;
+  }
+}
+
 int app_renderOverlay(struct Rect * rects, int maxRects)
 {
   int  totalRects  = 0;
@@ -675,6 +704,16 @@ int app_renderOverlay(struct Rect * rects, int maxRects)
     totalDamage = true;
     ImDrawList_AddRectFilled(igGetBackgroundDrawListNil(), (ImVec2) { 0.0f , 0.0f },
       g_state.io->DisplaySize, 0xCC000000, 0, 0);
+
+    bool test;
+    igShowDemoWindow(&test);
+
+    ImGuiMouseCursor cursor = igGetMouseCursor();
+    if (cursor != g_state.cursorLast)
+    {
+      g_state.ds->setPointer(mapImGuiCursor(cursor));
+      g_state.cursorLast = cursor;
+    }
   }
 
   // render the overlays

client/src/keybind.c

@@ -136,6 +136,7 @@ static void bind_passthrough(int sc, void * opaque)
 static void bind_toggleOverlay(int sc, void * opaque)
 {
   g_state.overlayInput ^= true;
+  g_state.cursorLast    = -2;
   if (g_state.overlayInput)
   {
     g_state.io->ConfigFlags &= ~ImGuiConfigFlags_NoMouse;

client/src/main.c

@@ -780,6 +780,8 @@ static int lg_run(void)
   g_state.io    = igGetIO();
   g_state.style = igGetStyle();
 
+  g_state.io->BackendFlags |= ImGuiBackendFlags_HasMouseCursors;
+
   g_state.windowScale = 1.0;
   g_state.fontName    = util_getUIFont(g_params.uiFont);
   DEBUG_INFO("Using font: %s", g_state.fontName);

client/src/main.h

@@ -48,12 +48,13 @@ struct AppState
 {
   enum RunState state;
 
-  ImGuiIO    * io;
-  ImGuiStyle * style;
-  struct ll  * overlays;
-  char       * fontName;
-  ImFont     * fontLarge;
-  bool         overlayInput;
+  ImGuiIO        * io;
+  ImGuiStyle     * style;
+  struct ll      * overlays;
+  char           * fontName;
+  ImFont         * fontLarge;
+  bool             overlayInput;
+  ImGuiMouseCursor cursorLast;
 
   bool        alertShow;
   char      * alertMessage;