GL_EXT_multisample http://oss.sgi.com/projects/ogl-sample/registry/EXT/wgl_multisample.txt GL_MULTISAMPLE_EXT 0x809D GL_SAMPLE_ALPHA_TO_MASK_EXT 0x809E GL_SAMPLE_ALPHA_TO_ONE_EXT 0x809F GL_SAMPLE_MASK_EXT 0x80A0 GL_1PASS_EXT 0x80A1 GL_2PASS_0_EXT 0x80A2 GL_2PASS_1_EXT 0x80A3 GL_4PASS_0_EXT 0x80A4 GL_4PASS_1_EXT 0x80A5 GL_4PASS_2_EXT 0x80A6 GL_4PASS_3_EXT 0x80A7 GL_SAMPLE_BUFFERS_EXT 0x80A8 GL_SAMPLES_EXT 0x80A9 GL_SAMPLE_MASK_VALUE_EXT 0x80AA GL_SAMPLE_MASK_INVERT_EXT 0x80AB GL_SAMPLE_PATTERN_EXT 0x80AC GL_MULTISAMPLE_BIT_EXT 0x20000000 void glSampleMaskEXT (GLclampf value, GLboolean invert) void glSamplePatternEXT (GLenum pattern)