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* glsl: Ensure snprintf is defined on MSVC builds.José Fonseca2013-07-031-0/+1
| | | | | | | Should fix: src\glsl\opt_dead_builtin_varyings.cpp(244) : error C3861: 'snprintf': identifier not found ...
* glsl/linker: eliminate unused and set-but-unused built-in varyingsMarek Olšák2013-07-021-0/+476
This eliminates built-in varyings such as gl_Color, gl_SecondaryColor, gl_TexCoord, and gl_FogFragCoord if they are unused by the next stage or not written at all (e.g. gl_TexCoord elements). The gl_TexCoord array is broken down into separate vec4s if needed. v2: - use a switch statement in varying_info_visitor::visit(ir_variable*) - use snprintf - disable the optimization for GLES2 Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>