Mesa (master): mesa: Fix alpha component in unpack_R8G8B8X8_SRGB.

[Dave Airlie]

Module: Mesa
Branch: master
Commit: 3ff5c6a6c472288fa5f50d880621f38ea94b9c23
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=3ff5c6a6c472288fa5f50d880621f38ea94b9c23

Author: Richard Sandiford <rsandifo at linux.vnet.ibm.com>
Date:   Tue Sep 16 16:28:05 2014 +1000

mesa: Fix alpha component in unpack_R8G8B8X8_SRGB.

The function was using the "X" component as the alpha channel,
rather than setting alpha to 1.0.

Signed-off-by: Richard Sandiford <rsandifo at linux.vnet.ibm.com>
Reviewed-by: Brian Paul <brianp at vmware.com>
Reviewed-by: Jason Ekstrand <jason.ekstrand at intel.com>
Cc: <mesa-stable at lists.freedesktop.org>
Signed-off-by: Dave Airlie <airlied at redhat.com>

---

 src/mesa/main/format_unpack.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/mesa/main/format_unpack.c b/src/mesa/main/format_unpack.c
index b84ed02..0e2c438 100644
--- a/src/mesa/main/format_unpack.c
+++ b/src/mesa/main/format_unpack.c
@@ -2100,7 +2100,7 @@ unpack_R8G8B8X8_SRGB(const void *src, GLfloat dst[][4], GLuint n)
       dst[i][RCOMP] = util_format_srgb_8unorm_to_linear_float( (s[i]      ) & 0xff );
       dst[i][GCOMP] = util_format_srgb_8unorm_to_linear_float( (s[i] >>  8) & 0xff );
       dst[i][BCOMP] = util_format_srgb_8unorm_to_linear_float( (s[i] >> 16) & 0xff );
-      dst[i][ACOMP] = UBYTE_TO_FLOAT( s[i] >> 24 ); /* linear! */
+      dst[i][ACOMP] = 1.0f;
    }
 }