1*4882a593SmuzhiyunFrom f896699c8cdac55e0460c506ba633d22b9086626 Mon Sep 17 00:00:00 2001
2*4882a593SmuzhiyunFrom: Jeffy Chen <jeffy.chen@rock-chips.com>
3*4882a593SmuzhiyunDate: Fri, 5 Aug 2022 11:27:54 +0800
4*4882a593SmuzhiyunSubject: [PATCH 75/79] gl-renderer: Clear RGB when alpha is zero in fast path
5*4882a593Smuzhiyun
6*4882a593SmuzhiyunSigned-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
7*4882a593Smuzhiyun---
8*4882a593Smuzhiyun libweston/renderer-gl/fragment.glsl | 8 ++++++--
9*4882a593Smuzhiyun 1 file changed, 6 insertions(+), 2 deletions(-)
10*4882a593Smuzhiyun
11*4882a593Smuzhiyundiff --git a/libweston/renderer-gl/fragment.glsl b/libweston/renderer-gl/fragment.glsl
12*4882a593Smuzhiyunindex 4414b63..a90cbfa 100644
13*4882a593Smuzhiyun--- a/libweston/renderer-gl/fragment.glsl
14*4882a593Smuzhiyun+++ b/libweston/renderer-gl/fragment.glsl
15*4882a593Smuzhiyun@@ -253,8 +253,12 @@ main()
16*4882a593Smuzhiyun 		/* Fast path for disabled color management */
17*4882a593Smuzhiyun
18*4882a593Smuzhiyun 		if (c_input_is_premult) {
19*4882a593Smuzhiyun-			/* View alpha (opacity) */
20*4882a593Smuzhiyun-			color *= alpha;
21*4882a593Smuzhiyun+			if (color.a == 0.0) {
22*4882a593Smuzhiyun+				color.rgb = vec3(0, 0, 0);
23*4882a593Smuzhiyun+			} else {
24*4882a593Smuzhiyun+				/* View alpha (opacity) */
25*4882a593Smuzhiyun+				color *= alpha;
26*4882a593Smuzhiyun+			}
27*4882a593Smuzhiyun 		} else {
28*4882a593Smuzhiyun 			/* View alpha (opacity) */
29*4882a593Smuzhiyun 			color.a *= alpha;
30*4882a593Smuzhiyun--
31*4882a593Smuzhiyun2.20.1
32*4882a593Smuzhiyun
33