color type "\b(void|bool|bvec2|bvec3|bvec4|int|ivec2|ivec3|ivec4|float|vec2|vec3|vec4|mat2|mat3|mat4|struct|sampler1D|sampler2D|sampler3D|samplerCUBE|sampler1DShadow|sampler2DShadow)\b"
color identifier "\bgl_(DepthRangeParameters|PointParameters|MaterialParameters|LightSourceParameters|LightModelParameters|LightModelProducts|LightProducts|FogParameters)\b"