[gtk/wip/baedert/for-master: 53/54] gl renderer: Add a short cut for repeat nodes that don't repeat

[Timm Bäder <baedert src gnome org>]

commit 600ce68210617c15c779ab9b85d24ab5c702dc76
Author: Timm Bäder <mail baedert org>
Date:   Tue Nov 19 10:45:02 2019 +0100

    gl renderer: Add a short cut for repeat nodes that don't repeat
    
    These happen and we don't even need to draw the child to a texture.

 gsk/gl/gskglrenderer.c | 29 ++++++++++++++++++++++++-----
 1 file changed, 24 insertions(+), 5 deletions(-)
---
diff --git a/gsk/gl/gskglrenderer.c b/gsk/gl/gskglrenderer.c
index 357e09108d..9fd13a3480 100644
--- a/gsk/gl/gskglrenderer.c
+++ b/gsk/gl/gskglrenderer.c
@@ -1085,12 +1085,11 @@ render_linear_gradient_node (GskGLRenderer       *self,
 }
 
 static inline void
-render_clip_node (GskGLRenderer   *self,
-                  GskRenderNode   *node,
-                  RenderOpBuilder *builder)
+render_clipped_child (GskGLRenderer         *self,
+                      RenderOpBuilder       *builder,
+                      const graphene_rect_t *clip,
+                      GskRenderNode         *child)
 {
-  const graphene_rect_t *clip = gsk_clip_node_peek_clip (node);
-  GskRenderNode *child = gsk_clip_node_get_child (node);
   graphene_rect_t transformed_clip;
   graphene_rect_t intersection;
   GskRoundedRect child_clip;
@@ -1108,6 +1107,17 @@ render_clip_node (GskGLRenderer   *self,
   ops_pop_clip (builder);
 }
 
+static inline void
+render_clip_node (GskGLRenderer   *self,
+                  GskRenderNode   *node,
+                  RenderOpBuilder *builder)
+{
+  const graphene_rect_t *clip = gsk_clip_node_peek_clip (node);
+  GskRenderNode *child = gsk_clip_node_get_child (node);
+
+  render_clipped_child (self, builder, clip, child);
+}
+
 static inline void
 get_inner_rect (const GskRoundedRect *rect,
                 graphene_rect_t       *out)
@@ -1962,6 +1972,15 @@ render_repeat_node (GskGLRenderer   *self,
       return;
     }
 
+  /* If the size of the repeat node is smaller than the size of the
+   * child node, we don't repeat at all and can just draw that part
+   * of the child texture... */
+  if (graphene_rect_contains_rect (child_bounds, &node->bounds))
+    {
+      render_clipped_child (self, builder, &node->bounds, child);
+      return;
+    }
+
   /* Draw the entire child on a texture */
   add_offscreen_ops (self, builder,
                      &child->bounds,