[cairo] [PATCH 3/4] _clip_get_single_path() does not skip boxes anymore

[Taekyun Kim]

From: Taekyun Kim <tkq.kim at samsung.com>

This function is used for reducing paint to fill with NULL clip.
So this function should return NULL unless clip contains exactly
one single path.

In _cairo_image_surface_fill(), this function is also used for
eliminating clip if filling path and clip path are identical.
This also requires that clip must contain a single path.
---
 src/cairo-image-surface.c |   16 +++-------------
 1 files changed, 3 insertions(+), 13 deletions(-)

diff --git a/src/cairo-image-surface.c b/src/cairo-image-surface.c
index 92223fc..fe01737 100644
--- a/src/cairo-image-surface.c
+++ b/src/cairo-image-surface.c
@@ -3230,20 +3230,10 @@ _clip_and_composite_trapezoids (cairo_image_surface_t *dst,
 static cairo_clip_path_t *
 _clip_get_single_path (cairo_clip_t *clip)
 {
-    cairo_clip_path_t *iter = clip->path;
-    cairo_clip_path_t *path = NULL;
+    if (clip->path->prev == NULL)
+	return clip->path;
 
-    do {
-	if ((iter->flags & CAIRO_CLIP_PATH_IS_BOX) == 0) {
-	    if (path != NULL)
-		return FALSE;
-
-	    path = iter;
-	}
-	iter = iter->prev;
-    } while (iter != NULL);
-
-    return path;
+    return NULL;
 }
 
 /* high level image interface */
-- 
1.7.1