window: change boolean to flags in toysurface::prepare()

Change the boolean parameter 'resize_hint' into a bitmask 'flags'.

Note, that this flags is very different to the other flags used in
creating the toysurface implementations. They do not make sense to mix
one way or the other. Prepare() cannot change the surface type, and
surface constructors do not care for dynamic hint flags.

Signed-off-by: Pekka Paalanen <ppaalanen@gmail.com>

clients/window.c

@@ -147,17 +147,22 @@ struct window_output {
 	struct wl_list link;
 };
 
+enum toysurface_prepare_flags {
+	SURFACE_HINT_RESIZE = 0x01,
+};
+
 struct toysurface {
 	/*
 	 * Prepare the surface for drawing. Makes sure there is a surface
 	 * of the right size available for rendering, and returns it.
 	 * dx,dy are the x,y of wl_surface.attach.
 	 * width,height are the new surface size.
-	 * If resize_hint is non-zero, the user is doing continuous resizing.
+	 * If flags has SURFACE_HINT_RESIZE set, the user is
+	 * doing continuous resizing.
 	 * Returns the Cairo surface to draw to.
 	 */
 	cairo_surface_t *(*prepare)(struct toysurface *base, int dx, int dy,
-				    int width, int height, int resize_hint);
+				    int width, int height, uint32_t flags);
 
 	/*
 	 * Post the surface to the server, returning the server allocation
@@ -413,7 +418,7 @@ to_egl_window_surface(struct toysurface *base)
 
 static cairo_surface_t *
 egl_window_surface_prepare(struct toysurface *base, int dx, int dy,
-			   int width, int height, int resize_hint)
+			   int width, int height, uint32_t flags)
 {
 	struct egl_window_surface *surface = to_egl_window_surface(base);
 
@@ -835,8 +840,9 @@ static const struct wl_buffer_listener shm_surface_buffer_listener = {
 
 static cairo_surface_t *
 shm_surface_prepare(struct toysurface *base, int dx, int dy,
-		    int width, int height, int resize_hint)
+		    int width, int height, uint32_t flags)
 {
+	int resize_hint = !!(flags & SURFACE_HINT_RESIZE);
 	struct shm_surface *surface = to_shm_surface(base);
 	struct rectangle rect = { 0, 0, width, height };
 	struct shm_surface_leaf *leaf;
@@ -1216,12 +1222,17 @@ window_create_surface(struct window *window)
 							window->surface, flags,
 							&allocation);
 
+	if (window->resizing)
+		flags = SURFACE_HINT_RESIZE;
+	else
+		flags = 0;
+
 	window_get_resize_dx_dy(window, &dx, &dy);
 	window->cairo_surface =
 		window->toysurface->prepare(window->toysurface, dx, dy,
 					    allocation.width,
 					    allocation.height,
-					    window->resizing);
+					    flags);
 }
 
 int