2.9 KiB
2.9 KiB
GLSL optimizer Change Log
2014 10
Goodies:
- Support for translating GLSL shaders into Apple Metal shading language. Exactly same process; GLSL in (preferably ES3 variant), optimization passes, Metal out. All uniforms currently will be put into one constant buffer. Pass kGlslTargetMetal target to get Metal.
- Shader reflection API. See glslopt_shader_get_* functions. Binding indices are only automatically assigned on Metal now; on GL/ES targets the reflection API is only useful to get list of inputs/uniforms, their names and types.
- Improved dead code elimation: some cases of swizzled/masked assignments where same variable was on both sides were not eliminated if that variable was totally unused later.
- Merged with upstream Mesa, comes with new optimizations (min/max pruning, tree rebalancing, vector_insert lowering).
Fixes:
- sampler3D declarations were missing precision qualifier on GLES3.0.
2014 09
Goodies:
- Supports GL_EXT_draw_buffers in ES2.0, for MRT.
2014 08
Goodies:
- Supports GL_EXT_shader_framebuffer_fetch now, in both ES2.0 & 3.0.
Fixes:
- Fixed printing of infinities & NaNs.
- Fixed vectorization pass in some cases going wrong on texture lookups.
2014 06
Goodies:
- Optimization: split vectors with only some used components into scalars.
Fixes:
- Fixed more issues with for-loop printing.
- Fixed printing of unsigned integer swizzled & constants.
2014 03
Fixes:
- Fixed missing precision qualifier in some ES shaders (mostly due to expansion of ternary ?: check).
2014 02
Fixes:
- Fixed vectorize pass introduced last month going wrong with dot products.
2014 01
Goodies:
- Better optimization: vectorize assignments to individual vector channels.
- More OpenGL ES 2.0 conformant printing of complex for-loops (loop inductions printed as += or ++; loop initializers inside loop body).
Fixes:
- Fixed array assignments sometimes appearing in pre-GLSL1.20 versions, especially with complex loops that couldn't be unrolled.
- Fixed output of textureOffset and texelFetch.
- Fixed error messages on MRT outputs on GL & GLES3 (now supports 4 MRTs).
2013 12
Goodies:
- Optimized performance; was spending half of the time in stupid string code.
- Added glslopt_shader_get_stats to get very approximate shader complexity stats.
- Nicer printing of complicated for-loops.
Fixes:
- Fixed printing of struct initializers.
2013 11
Goodies:
- Better optimizations: CSE;
A+(-B) => A-B;!A || !B => !(A && B). - Merged with upstream Mesa.
Fixes:
- Fixed location qualifiers, ES3.0 version printing, samplerCubeShadow sampling operations.
2013 10
Goodies:
- Initial OpenGL ES 3.0 support
- API to query shader input names; glslopt_shader_get_input_count and glslopt_shader_get_input_name
Changes:
- Xcode project files updated to Xcode 5
Fixes:
- VS2013 fixes