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mesa/st: Don't use 4bits for GL_UNSIGNED_BYTE_3_3_2(_REV)

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4bits and 3bits quantitization values differ significantly for
values other than 0 and 1.

Fixes piglit draw-pixels for softpipe/llvmpipe.

NOTE: Probably a candidate for stable branches.

Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Marek Olšák <maraeo@gmail.com>
(cherry picked from commit 0cb0c38cce)
This commit is contained in:
José Fonseca 2012-10-25 15:47:12 +01:00 • committed by Andreas Boll
parent 3479fdef2f
commit 738d1ae3b5
1 changed files with 2 additions and 0 deletions
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src/mesa/state_tracker/st_cb_drawpixels.c
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@ -398,6 +398,8 @@ internal_format(struct gl_context *ctx, GLenum format, GLenum type)
case GL_UNSIGNED_BYTE_3_3_2:
case GL_UNSIGNED_BYTE_2_3_3_REV:
return GL_R3_G3_B2;
case GL_UNSIGNED_SHORT_4_4_4_4:
case GL_UNSIGNED_SHORT_4_4_4_4_REV:
return GL_RGBA4;