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-rw-r--r--src/gallium/auxiliary/util/u_simple_shaders.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/src/gallium/auxiliary/util/u_simple_shaders.c b/src/gallium/auxiliary/util/u_simple_shaders.c
index 0d706f9449d..1c8b157d91f 100644
--- a/src/gallium/auxiliary/util/u_simple_shaders.c
+++ b/src/gallium/auxiliary/util/u_simple_shaders.c
@@ -108,7 +108,15 @@ util_make_fragment_tex_shader_writemask(struct pipe_context *pipe,
TGSI_SEMANTIC_COLOR,
0 );
- ureg_TEX( ureg, out, TGSI_TEXTURE_2D, tex, sampler );
+ if (writemask != TGSI_WRITEMASK_XYZW) {
+ struct ureg_src imm = ureg_imm4f( ureg, 0, 0, 0, 1 );
+
+ ureg_MOV( ureg, out, imm );
+ }
+
+ ureg_TEX( ureg,
+ ureg_writemask(out, writemask),
+ TGSI_TEXTURE_2D, tex, sampler );
ureg_END( ureg );
return ureg_create_shader_and_destroy( ureg, pipe );