[gtk/wip/otte/for-master: 2/4] vulkan: Improve rounded rect clipping

[Benjamin Otte <otte src gnome org>]

commit fea67dea6acad0504adeb6d36af9e8fbd975dc1e
Author: Benjamin Otte <otte redhat com>
Date:   Sat Mar 6 20:44:38 2021 +0100

    vulkan: Improve rounded rect clipping
    
    Handle the case where the inner rounded rect is fully contained
    within the outer rounded rect.

 gsk/vulkan/gskvulkanclip.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)
---
diff --git a/gsk/vulkan/gskvulkanclip.c b/gsk/vulkan/gskvulkanclip.c
index d7e0582124..fa8d561c00 100644
--- a/gsk/vulkan/gskvulkanclip.c
+++ b/gsk/vulkan/gskvulkanclip.c
@@ -126,7 +126,13 @@ gsk_vulkan_clip_intersect_rounded_rect (GskVulkanClip        *dest,
 
     case GSK_VULKAN_CLIP_ROUNDED_CIRCULAR:
     case GSK_VULKAN_CLIP_ROUNDED:
-      /* XXX: improve */
+      if (gsk_rounded_rect_contains_rect (&src->rect, &rounded->bounds))
+        {
+          dest->type = gsk_rounded_rect_is_circular (rounded) ? GSK_VULKAN_CLIP_ROUNDED_CIRCULAR : 
GSK_VULKAN_CLIP_ROUNDED;
+          gsk_rounded_rect_init_copy (&dest->rect, rounded);
+          return TRUE;
+        }
+      /* XXX: Can be improved for the case where one of the rects is a slighty shrunk version of the other */
       return FALSE;
 
     default: