| GL_NV_geometry_program4 | |
| http://developer.download.nvidia.com/opengl/specs/GL_NV_geometry_program4.txt | |
| GL_GEOMETRY_PROGRAM_NV 0x8C26 | |
| GL_MAX_PROGRAM_OUTPUT_VERTICES_NV 0x8C27 | |
| GL_MAX_PROGRAM_TOTAL_OUTPUT_COMPONENTS_NV 0x8C28 | |
| void glProgramVertexLimitNV (GLenum target, GLint limit) |