From 69a150b7d8115babf2c60d7c5f7ca340162dc098 Mon Sep 17 00:00:00 2001
From: Eric Anholt <eric@anholt.net>
Date: Mon, 1 Jun 2009 13:36:32 -0700
Subject: [PATCH] [gl] Initialize has_alpha in the image surface composite
 fastpath.

Fixes bilevel-image, set-source, and zero-alpha.
---
 src/cairo-gl-surface.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/cairo-gl-surface.c b/src/cairo-gl-surface.c
index 5bcdff18c..c052794ab 100644
--- a/src/cairo-gl-surface.c
+++ b/src/cairo-gl-surface.c
@@ -948,6 +948,10 @@ _cairo_gl_pattern_image_texture_setup (cairo_gl_composite_operand_t *operand,
     operand->type = OPERAND_TEXTURE;
     operand->operand.texture.tex = tex;
     operand->operand.texture.surface = NULL;
+    /* The textures we create always have appropriate alpha channels --
+     * we aren't uploading x8 channels to a8 channels.
+     */
+    operand->operand.texture.has_alpha = TRUE;
     attributes->matrix = src->matrix;
     attributes->extend = src->extend;
     attributes->filter = src->filter;