diff --git a/libweston/renderer-gl/gl-renderer.c b/libweston/renderer-gl/gl-renderer.c
index 7837f53e..ab921edf 100644
--- a/libweston/renderer-gl/gl-renderer.c
+++ b/libweston/renderer-gl/gl-renderer.c
@@ -1589,15 +1589,6 @@ draw_paint_node(struct weston_paint_node *pnode,
 	if (!gl_shader_config_init_for_paint_node(&sconf, pnode, filter))
 		goto out;
 
-	/* blended region is whole surface minus opaque region: */
-	pixman_region32_init_rect(&surface_blend, 0, 0,
-				  pnode->surface->width, pnode->surface->height);
-	if (pnode->view->geometry.scissor_enabled)
-		pixman_region32_intersect(&surface_blend, &surface_blend,
-					  &pnode->view->geometry.scissor);
-	pixman_region32_subtract(&surface_blend, &surface_blend,
-				 &pnode->surface->opaque);
-
 	/* XXX: Should we be using ev->transform.opaque here? */
 	pixman_region32_init(&surface_opaque);
 	if (pnode->view->geometry.scissor_enabled)
@@ -1607,6 +1598,15 @@ draw_paint_node(struct weston_paint_node *pnode,
 	else
 		pixman_region32_copy(&surface_opaque, &pnode->surface->opaque);
 
+	/* blended region is whole surface minus opaque region: */
+	pixman_region32_init_rect(&surface_blend, 0, 0,
+				  pnode->surface->width, pnode->surface->height);
+	if (pnode->view->geometry.scissor_enabled)
+		pixman_region32_intersect(&surface_blend, &surface_blend,
+					  &pnode->view->geometry.scissor);
+	pixman_region32_subtract(&surface_blend, &surface_blend,
+				 &pnode->surface->opaque);
+
 	maybe_replace_paint_node(&sconf, pnode);
 
 	if (pixman_region32_not_empty(&surface_opaque)) {