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| author | Marcin Slusarz <[email protected]> | 2012-06-16 20:30:14 +0200 |
|---|---|---|
| committer | Marcin Slusarz <[email protected]> | 2012-06-20 21:16:20 +0200 |
| commit | 7e63b613a5a067462c450338e0bdce5b5976f6f1 (patch) | |
| tree | 8d98c6204c058e6b9ac46249672c98c34831227d /docs | |
| parent | f2f05e50b1e88b431cb98348bf67e6d5a35d8cf1 (diff) | |
st/mesa: fix transform feedback of unsubscripted gl_ClipDistance array
gl_ClipDistance needs special treatment in form of lowering pass
which transforms gl_ClipDistance representation from float[] to
vec4[]. There are 2 implementations - at glsl linker level (enabled
by LowerClipDistance option) and at glsl_to_tgsi level (enabled
unconditionally for gallium drivers). Second implementation is
incomplete - it does not take into account transform feedback (see
commit 642e5b413e0890b2070ba78fde42db381eaf02e5 "mesa: Fix transform
feedback of unsubscripted gl_ClipDistance array" for details).
There are 2 possible fixes:
- adding transform feedback support into glsl_to_tgsi version
- ripping gl_ClipDistance support from glsl_to_tgsi and enabling
gl_ClipDistance lowering on glsl linker side
This patch implements 2nd option. All it does is:
- reverts most of the commit 59be691638200797583bce39a83f641d30d97492
"st/mesa: add support for gl_ClipDistance"
- changes LowerClipDistance to true
Fixes Piglit tests "EXT_transform_feedback/builtin-varyings
gl_ClipDistance[{2,3,4,5,6,7,8}]-no-subscript" at least on nv50
and evergreen cards.
Diffstat (limited to 'docs')
0 files changed, 0 insertions, 0 deletions