mesa: a64c1eb9b110f29b8abf803a8256306702629bdc (master) Run piglit fbo-blending-formats on llvmpipe. $ ./bin/fbo-blending-formats -auto Using test set: Core formats Testing 3 Testing 4 Testing GL_RGB Testing GL_RGBA Testing GL_ALPHA Testing GL_LUMINANCE Testing GL_LUMINANCE_ALPHA Testing GL_INTENSITY Probe at (96,0) Expected: 0.810000 0.000000 0.000000 1.000000 Observed: 0.796078 0.000000 0.000000 1.000000 when testing FBO result, blending with DST_ALPHA. Testing GL_ALPHA4 Testing GL_ALPHA8 Testing GL_ALPHA12 Testing GL_ALPHA16 Testing GL_LUMINANCE4 Testing GL_LUMINANCE8 Testing GL_LUMINANCE12 Testing GL_LUMINANCE16 Testing GL_LUMINANCE4_ALPHA4 Testing GL_LUMINANCE8_ALPHA8 Testing GL_LUMINANCE12_ALPHA12 Testing GL_LUMINANCE16_ALPHA16 Testing GL_INTENSITY4 Probe at (96,0) Expected: 0.810000 0.000000 0.000000 1.000000 Observed: 0.796078 0.000000 0.000000 1.000000 when testing FBO result, blending with DST_ALPHA. Testing GL_INTENSITY8 Probe at (96,0) Expected: 0.810000 0.000000 0.000000 1.000000 Observed: 0.796078 0.000000 0.000000 1.000000 when testing FBO result, blending with DST_ALPHA. Testing GL_INTENSITY12 Testing GL_INTENSITY16 Testing GL_R3_G3_B2 Testing GL_RGB4 Testing GL_RGB5 Testing GL_RGB8 Testing GL_RGB10 Testing GL_RGB12 Testing GL_RGB16 Testing GL_RGBA2 Testing GL_RGBA4 Testing GL_RGB5_A1 Testing GL_RGBA8 Testing GL_RGB10_A2 Testing GL_RGBA12 Testing GL_RGBA16 PIGLIT: {'result': 'fail' } 7d44d354bdba853e453ce3991396e2b0933468f4 is the first bad commit commit 7d44d354bdba853e453ce3991396e2b0933468f4 Author: José Fonseca <jfonseca@vmware.com> Date: Tue Dec 4 13:38:52 2012 +0000 gallivm: Generalize lp_build_mul and lp_build_lerp for signed normalized types. This fixes fdo bug 57755 and most of the failures of piglit fbo-blending-formats GL_EXT_texture_snorm. GL_INTENSITY_SNORM is still failing, but problem is probably elsewhere, as GL_R8_SNORM works fine. :040000 040000 2516938b50b01e57b07561c913ff734117d16f47 73b5d8f8beac889bfb7bf52a63fae84b2855b903 Msrc bisect run success
I have a llvmpipe fix out for review. It needs also a piglit tweak, also out for review, as the test is too strict.
Fix with commit 5e99cd915921d7b863a66badf09941f11120c6ab Author: José Fonseca <jfonseca@vmware.com> Date: Thu Dec 6 09:30:53 2012 +0000 gallivm: Fix lerping of (un)signed normalized numbers. Several issues actually: - Fix a regression in unsigned normalized in the rescaling [0, 255] to [0, 256] - Ensure we use signed shifts where appropriate (instead of unsigned shifts) - Refactor the code slightly -- move all the logic inside lp_build_lerp_simple(). This change, plus an adjustment in the tolerance of signed normalized results in piglit fbo-blending-formats fixes bug 57903 Reviewed-by: Brian Paul <brianp@vmware.com> commit 8c7e49c402025a3db3675954377478bd832189dd Author: José Fonseca <jfonseca@vmware.com> Date: Wed Dec 5 23:46:59 2012 +0000 fbo-blending-formats: Correct precision of signed normalized types. Signed types have less precision due to the sign bit. Without this it is impossible to devise an efficient way of lerping signed normalized types that makes this test happy -- it would require 32bit float/int multiply and divides to get exact results. Reviewed-by: Brian Paul <brianp@vmware.com>
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