Mesa (master): meta: Don't alter fragment color clamp in DrawPixels().

Kenneth Graunke kwg at kemper.freedesktop.org
Mon Jul 2 18:09:46 UTC 2012


Module: Mesa
Branch: master
Commit: d73f6375f50be6a76991e240222a8e25906bfe4b
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=d73f6375f50be6a76991e240222a8e25906bfe4b

Author: Kenneth Graunke <kenneth at whitecape.org>
Date:   Sat Jun  9 02:33:20 2012 -0700

meta: Don't alter fragment color clamp in DrawPixels().

DrawPixels uses the MESA_META_CLAMP_FRAGMENT_COLOR flag to save/restore
the fragment color clamp mode.  This is unnecessary since it never
alters it.  It's also harmful: when the clamp mode is GL_FIXED_ONLY,
setting this flag causes _mesa_meta_begin to force it to GL_FALSE,
breaking clamping on SNORM formats.

DrawPixels should use the user-specified clamp mode and not change it.

Fixes Piglit's spec/ARB_color_buffer_float/GL_RGBA8_SNORM-drawpixels
test on i965/Sandybridge (with SNORM render targets re-enabled).

Reviewed-by: Eric Anholt <eric at anholt.net>
Signed-off-by: Kenneth Graunke <kenneth at whitecape.org>

---

 src/mesa/drivers/common/meta.c |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)

diff --git a/src/mesa/drivers/common/meta.c b/src/mesa/drivers/common/meta.c
index be7141a..6a53393 100644
--- a/src/mesa/drivers/common/meta.c
+++ b/src/mesa/drivers/common/meta.c
@@ -2347,7 +2347,6 @@ _mesa_meta_DrawPixels(struct gl_context *ctx,
                           MESA_META_CLIP |
                           MESA_META_VERTEX |
                           MESA_META_VIEWPORT |
-			  MESA_META_CLAMP_FRAGMENT_COLOR |
                           metaExtraSave));
 
    newTex = alloc_texture(tex, width, height, texIntFormat);




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