New feature: support MOUSE_PASSTHROUGH #2516

src/raylib.h

@@ -501,6 +501,7 @@ typedef enum {
     FLAG_WINDOW_ALWAYS_RUN  = 0x00000100,   // Set to allow windows running while minimized
     FLAG_WINDOW_TRANSPARENT = 0x00000010,   // Set to allow transparent framebuffer
     FLAG_WINDOW_HIGHDPI     = 0x00002000,   // Set to support HighDPI
+    FLAG_WINDOW_MOUSE_PASSTHROUGH = 0x0002000d, // Set to support mouse passthrough, only supported when FLAG_WINDOW_UNDECORATED
     FLAG_MSAA_4X_HINT       = 0x00000020,   // Set to try enabling MSAA 4X
     FLAG_INTERLACED_HINT    = 0x00010000    // Set to try enabling interlaced video format (for V3D)
 } ConfigFlags;

src/rcore.c

@@ -4036,6 +4036,10 @@ static bool InitGraphicsDevice(int width, int height)
     #endif
     }
     else glfwWindowHint(GLFW_SCALE_TO_MONITOR, GLFW_FALSE);
+    
+    // Mouse passthrough
+    if ((CORE.Window.flags & FLAG_WINDOW_MOUSE_PASSTHROUGH) > 0) glfwWindowHint(GLFW_MOUSE_PASSTHROUGH, GLFW_TRUE);
+    else glfwWindowHint(GLFW_MOUSE_PASSTHROUGH, GLFW_FALSE);
 #endif
 
     if (CORE.Window.flags & FLAG_MSAA_4X_HINT)