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-rw-r--r--pixman/pixman/pixman-edge.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/pixman/pixman/pixman-edge.c b/pixman/pixman/pixman-edge.c
index 8d498ab44..ad6dfc4cf 100644
--- a/pixman/pixman/pixman-edge.c
+++ b/pixman/pixman/pixman-edge.c
@@ -374,6 +374,7 @@ pixman_rasterize_edges (pixman_image_t *image,
pixman_fixed_t b)
{
return_if_fail (image->type == BITS);
+ return_if_fail (PIXMAN_FORMAT_TYPE (image->bits.format) == PIXMAN_TYPE_A);
if (image->bits.read_func || image->bits.write_func)
pixman_rasterize_edges_accessors (image, l, r, t, b);