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-rw-r--r--src/mesa/drivers/dri/i965/brw_meta_fast_clear.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_meta_fast_clear.c b/src/mesa/drivers/dri/i965/brw_meta_fast_clear.c
index f4da5f3fd1f..76988bfda7b 100644
--- a/src/mesa/drivers/dri/i965/brw_meta_fast_clear.c
+++ b/src/mesa/drivers/dri/i965/brw_meta_fast_clear.c
@@ -653,6 +653,7 @@ brw_meta_fast_clear(struct brw_context *brw, struct gl_framebuffer *fb,
GLubyte *color_mask = ctx->Color.ColorMask[buf];
for (int i = 0; i < 4; i++) {
if (_mesa_format_has_color_component(irb->mt->format, i) &&
+ !(i == 3 && irb->Base.Base._BaseFormat == GL_RGB) &&
!color_mask[i]) {
perf_debug("Falling back to plain clear on %dx%d buffer because of color mask\n",
irb->mt->logical_width0, irb->mt->logical_height0);