From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon@freedesktop.org
Subject: [Bug 51000] New: [r300g, bisected] piglit fbo-generatemipmap-formats
fails
Date: Tue, 12 Jun 2012 10:09:29 +0000
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https://bugs.freedesktop.org/show_bug.cgi?id=51000
Bug #: 51000
Summary: [r300g, bisected] piglit fbo-generatemipmap-formats
fails
Classification: Unclassified
Product: Mesa
Version: git
Platform: Other
OS/Version: All
Status: NEW
Keywords: regression
Severity: normal
Priority: medium
Component: Drivers/Gallium/r300
AssignedTo: dri-devel@lists.freedesktop.org
ReportedBy: pavel.ondracka@email.cz
CC: kenneth@whitecape.org
./bin/fbo-generatemipmap-formats -auto GL_EXT_texture_compression_rgtc
Using test set: GL_EXT_texture_compression_rgtc
Testing GL_COMPRESSED_RED
Probe at (1,1)
Expected: 1.000000 0.000000 0.000000 1.000000
Observed: 0.988235 0.000000 0.000000 1.000000
Testing GL_COMPRESSED_RED_RGTC1_EXT
Probe at (1,1)
Expected: 1.000000 0.000000 0.000000 1.000000
Observed: 0.988235 0.000000 0.000000 1.000000
Testing GL_COMPRESSED_RG
Testing GL_COMPRESSED_RED_GREEN_RGTC2_EXT
Testing GL_COMPRESSED_RED (NPOT)
Probe at (1,1)
Expected: 1.000000 0.000000 0.000000 1.000000
Observed: 0.988235 0.000000 0.000000 1.000000
Testing GL_COMPRESSED_RED_RGTC1_EXT (NPOT)
Probe at (1,1)
Expected: 1.000000 0.000000 0.000000 1.000000
Observed: 0.988235 0.000000 0.000000 1.000000
Testing GL_COMPRESSED_RG (NPOT)
Testing GL_COMPRESSED_RED_GREEN_RGTC2_EXT (NPOT)
PIGLIT: {'result': 'fail' }
f8d40deea5c4abbbf93c2c572ce668a5a25f95e2 is the first bad commit
commit f8d40deea5c4abbbf93c2c572ce668a5a25f95e2
Author: Kenneth Graunke
Date: Tue Jun 5 23:51:04 2012 -0700
mesa: Return 8 bits for GL_TEXTURE_RED_SIZE on RGTC formats.
From the issues section of the GL_ARB_texture_compression_rgtc extension:
15) What should glGetTexLevelParameter return for
GL_TEXTURE_GREEN_SIZE and GL_TEXTURE_BLUE_SIZE for the RGTC1
formats? What should glGetTexLevelParameter return for
GL_TEXTURE_BLUE_SIZE for the RGTC2 formats?
RESOLVED: Zero bits.
These formats always return 0.0 for these respective components
and have no bits devoted to these components.
Returning 8 bits for red size of RGTC1 and the red and green
sizes of RGTC2 makes sense because that's the maximum potential
precision for the uncompressed texels.
Thus, we need to return 8 bits for GL_TEXTURE_RED_SIZE on all RGTC formats
and 8 bits for GL_TEXTURE_GREEN_SIZE on RGTC2 formats. BLUE should be 0.
Fixes oglconform/rgtc/advanced.texture_fetch.tex_param.
Signed-off-by: Kenneth Graunke
Reviewed-by: Brian Paul
BTW llvmpipe works fine.
GPU:RV530
Kernel: 3.4.0-1.fc17.i686
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