Feed motion events through compositor.

This lets us pass events only to the window that we're mousing over
and we can now transform input events back to the window coordinate space.

egl-compositor.c

@@ -77,7 +77,8 @@ struct egl_surface {
 	GLuint texture;
 	struct wl_map map;
 	EGLSurface surface;
-
+	struct wl_surface *wl_surface;
+	int width, height;
 	struct wl_list link;
 };
 
@@ -616,6 +617,7 @@ notify_surface_create(struct wl_compositor *compositor,
 		return;
 
 	es->surface = EGL_NO_SURFACE;
+	es->wl_surface = surface;
 	wl_surface_set_data(surface, es);
 	wl_list_insert(ec->surface_list.prev, &es->link);
 
@@ -654,6 +656,8 @@ notify_surface_attach(struct wl_compositor *compositor,
 	if (es->surface != EGL_NO_SURFACE)
 		eglDestroySurface(ec->display, es->surface);
 
+	es->width = width;
+	es->height = height;
 	es->surface = eglCreateSurfaceForName(ec->display, ec->config,
 					      name, width, height, stride, NULL);
 
@@ -722,18 +726,6 @@ notify_commit(struct wl_compositor *compositor)
 	return ec->current_frame;
 }
 
-static void
-notify_pointer_motion(struct wl_compositor *compositor,
-		      struct wl_object *source, int x, int y)
-{
-	struct egl_compositor *ec = (struct egl_compositor *) compositor;
-	const int hotspot_x = 16, hotspot_y = 16;
-
-	ec->pointer->map.x = x - hotspot_x;
-	ec->pointer->map.y = y - hotspot_y;
-	schedule_repaint(ec);
-}
-
 static struct egl_surface *
 pick_surface(struct egl_compositor *ec, int32_t x, int32_t y)
 {
@@ -753,6 +745,28 @@ pick_surface(struct egl_compositor *ec, int32_t x, int32_t y)
 	return NULL;
 }
 
+static void
+notify_pointer_motion(struct wl_compositor *compositor,
+		      struct wl_object *source, int x, int y)
+{
+	struct egl_compositor *ec = (struct egl_compositor *) compositor;
+	struct egl_surface *es;
+	const int hotspot_x = 16, hotspot_y = 16;
+	int32_t sx, sy;
+
+	es = pick_surface(ec, x, y);
+	if (es) {
+		sx = (x - es->map.x) * es->width / es->map.width;
+		sy = (y - es->map.y) * es->height / es->map.height;
+		wl_display_post_surface_motion(ec->wl_display, es->wl_surface, 
+					       source, x, y, sx, sy);
+	}
+
+	ec->pointer->map.x = x - hotspot_x;
+	ec->pointer->map.y = y - hotspot_y;
+	schedule_repaint(ec);
+}
+
 static void
 notify_pointer_button(struct wl_compositor *compositor,
 		      struct wl_object *source,

wayland.c

@@ -70,6 +70,7 @@ struct wl_display {
 struct wl_surface {
 	struct wl_object base;
 
+	struct wl_client *client;
 	/* provided by client */
 	int width, height;
 	int buffer;
@@ -173,7 +174,8 @@ static const struct wl_interface surface_interface = {
 };
 
 static struct wl_surface *
-wl_surface_create(struct wl_display *display, uint32_t id)
+wl_surface_create(struct wl_display *display,
+		  struct wl_client *client, uint32_t id)
 {
 	struct wl_surface *surface;
 	const struct wl_compositor_interface *interface;
@@ -184,6 +186,7 @@ wl_surface_create(struct wl_display *display, uint32_t id)
 
 	surface->base.id = id;
 	surface->base.interface = &surface_interface;
+	surface->client = client;
 
 	wl_list_insert(display->surface_list.prev, &surface->link);
 
@@ -500,7 +503,7 @@ wl_display_create_surface(struct wl_client *client,
 	struct wl_surface *surface;
 	struct wl_object_ref *ref;
 
-	surface = wl_surface_create(display, id);
+	surface = wl_surface_create(display, client, id);
 
 	ref = malloc(sizeof *ref);
 	if (ref == NULL) {
@@ -629,12 +632,29 @@ wl_display_send_event(struct wl_display *display, uint32_t *data, size_t size)
 #define WL_INPUT_BUTTON 1
 #define WL_INPUT_KEY 2
 
+WL_EXPORT void
+wl_display_post_surface_motion(struct wl_display *display,
+			       struct wl_surface *surface,
+			       struct wl_object *source,
+			       int32_t x, int32_t y, int32_t sx, int32_t sy)
+{
+	uint32_t p[6];
+
+	p[0] = source->id;
+	p[1] = (sizeof p << 16) | WL_INPUT_MOTION;
+	p[2] = x;
+	p[3] = y;
+	p[4] = sx;
+	p[5] = sy;
+
+	wl_connection_write(surface->client->connection, p, sizeof p);
+}
+
 WL_EXPORT void
 wl_display_post_relative_event(struct wl_display *display,
 			       struct wl_object *source, int dx, int dy)
 {
 	const struct wl_compositor_interface *interface;
-	uint32_t p[4];
 
 	display->pointer_x += dx;
 	display->pointer_y += dy;
@@ -642,13 +662,6 @@ wl_display_post_relative_event(struct wl_display *display,
 	interface = display->compositor->interface;
 	interface->notify_pointer_motion(display->compositor, source,
 					 display->pointer_x, display->pointer_y);
-
-	p[0] = source->id;
-	p[1] = (sizeof p << 16) | WL_INPUT_MOTION;
-	p[2] = display->pointer_x;
-	p[3] = display->pointer_y;
-
-	wl_display_send_event(display, p, sizeof p);
 }
 
 WL_EXPORT void
@@ -656,7 +669,6 @@ wl_display_post_absolute_event(struct wl_display *display,
 			       struct wl_object *source, int x, int y)
 {
 	const struct wl_compositor_interface *interface;
-	uint32_t p[4];
 
 	display->pointer_x = x;
 	display->pointer_y = y;
@@ -664,13 +676,6 @@ wl_display_post_absolute_event(struct wl_display *display,
 	interface = display->compositor->interface;
 	interface->notify_pointer_motion(display->compositor, source,
 					 display->pointer_x, display->pointer_y);
-
-	p[0] = source->id;
-	p[1] = (sizeof p << 16) | WL_INPUT_MOTION;
-	p[2] = display->pointer_x;
-	p[3] = display->pointer_y;
-
-	wl_display_send_event(display, p, sizeof p);
 }
 
 WL_EXPORT void

wayland.h

@@ -135,6 +135,11 @@ wl_display_post_key_event(struct wl_display *display,
 void
 wl_display_post_frame(struct wl_display *display,
 		      uint32_t frame, uint32_t msecs);
+void
+wl_display_post_surface_motion(struct wl_display *display,
+			       struct wl_surface *surface,
+			       struct wl_object *source,
+			       int x, int y, int sx, int sy);
 
 struct wl_compositor {
 	const struct wl_compositor_interface *interface;