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swrast: Fix handling of MESA_FORMAT_L8A8_SRGB for big-endian

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Luminance is the least-significant byte of the uint16, rather than the
lowest byte in memory.  Other parts of mesa already handle this correctly
for big-endian, and swrast already handles other MESA_FORMAT_x8y8 formats
correctly.  This case was just an odd-one-out.

Signed-off-by: Richard Sandiford <rsandifo@linux.vnet.ibm.com>
Reviewed-by: Brian Paul <brianp@vmware.com>
Cc: <mesa-stable@lists.freedesktop.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Richard Sandiford 2014-09-16 16:27:57 +10:00 • committed by Dave Airlie
parent 3e3b1db5f7
commit ecc48f83c8
1 changed files with 3 additions and 3 deletions
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6
src/mesa/swrast/s_texfetch_tmp.h
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@ -808,11 +808,11 @@ static void
FETCH(L8A8_SRGB)(const struct swrast_texture_image *texImage,
GLint i, GLint j, GLint k, GLfloat *texel)
{
const GLubyte *src = TEXEL_ADDR(GLubyte, texImage, i, j, k, 2);
const GLushort s = *TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
texel[RCOMP] =
texel[GCOMP] =
texel[BCOMP] = util_format_srgb_8unorm_to_linear_float(src[0]);
texel[ACOMP] = UBYTE_TO_FLOAT(src[1]); /* linear */
texel[BCOMP] = util_format_srgb_8unorm_to_linear_float(s & 0xff);
texel[ACOMP] = UBYTE_TO_FLOAT(s >> 8); /* linear */
}