| GL_ARB_color_buffer_float | |
| http://oss.sgi.com/projects/ogl-sample/registry/ARB/color_buffer_float.txt | |
| GL_RGBA_FLOAT_MODE_ARB 0x8820 | |
| GL_CLAMP_VERTEX_COLOR_ARB 0x891A | |
| GL_CLAMP_FRAGMENT_COLOR_ARB 0x891B | |
| GL_CLAMP_READ_COLOR_ARB 0x891C | |
| GL_FIXED_ONLY_ARB 0x891D | |
| void glClampColorARB (GLenum target, GLenum clamp) |