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a3b4ab4c
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2011-09-16T00:53:26
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Further work on the function emulation.
This is to work around driver bugs. We added more functions, and removed some unnecessary ones. Remove the function group because we have flags for each function now. Use more macros instead of functions. Don't emit global precision because that will affect all later code.
ANGLEBUG=196
TEST=build and test on Mac ATI/NVIDIA, fixes the failing webgl glsl conformance tests.
Review URL: http://codereview.appspot.com/5011053
git-svn-id: https://angleproject.googlecode.com/svn/trunk@754 736b8ea6-26fd-11df-bfd4-992fa37f6226
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f420c424
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2011-09-12T18:27:59
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Add/remove more functions to use shims.
Remove normalize and add cos instead to avoid a crash in Mac with ATI cards (angle bug 193, 202).
Also add atan and mod as it's also buggy on Mac/Win with NVIDIA cards.
Also, trying to minimize emulated functions by adding masks for fragment/vertex shaders.
ANGLEBUG=196
Review URL: http://codereview.appspot.com/4992047
git-svn-id: https://angleproject.googlecode.com/svn/trunk@748 736b8ea6-26fd-11df-bfd4-992fa37f6226
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32e97315
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2011-08-24T01:03:11
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Emulate certain buil-in functions to work around driver bugs.
This is implemented by adding a new compile option SH_EMULATE_BUILT_IN_FUNCTIONS. The emulated functions are names as webgl_originalName_emu so there will never be naming conflicts.
At the moment only three functions are emulated: normalize, abs, sign. Also, the compile option will emulate all three. However, the mechanism to emulate only a selected subset is also imeplemented. It can be turned on easily.
ANGLEBUG=196
TEST=with this option, the failed test with abs.frag passes.
Review URL: http://codereview.appspot.com/4916043
git-svn-id: https://angleproject.googlecode.com/svn/trunk@738 736b8ea6-26fd-11df-bfd4-992fa37f6226
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