| GL_EXT_blend_func_separate | |
| http://oss.sgi.com/projects/ogl-sample/registry/EXT/blend_func_separate.txt | |
| GL_BLEND_DST_RGB_EXT 0x80C8 | |
| GL_BLEND_SRC_RGB_EXT 0x80C9 | |
| GL_BLEND_DST_ALPHA_EXT 0x80CA | |
| GL_BLEND_SRC_ALPHA_EXT 0x80CB | |
| void glBlendFuncSeparateEXT (GLenum sfactorRGB, GLenum dfactorRGB, GLenum sfactorAlpha, GLenum dfactorAlpha) |