| GL_NV_framebuffer_multisample_coverage | |
| http://developer.download.nvidia.com/opengl/specs/GL_NV_framebuffer_multisample_coverage.txt | |
| GL_RENDERBUFFER_COVERAGE_SAMPLES_NV 0x8CAB | |
| GL_RENDERBUFFER_COLOR_SAMPLES_NV 0x8E10 | |
| GL_MAX_MULTISAMPLE_COVERAGE_MODES_NV 0x8E11 | |
| GL_MULTISAMPLE_COVERAGE_MODES_NV 0x8E12 | |
| void glRenderbufferStorageMultisampleCoverageNV (GLenum target, GLsizei coverageSamples, GLsizei colorSamples, GLenum internalformat, GLsizei width, GLsizei height) |