GL_SGIS_multisample http://www.opengl.org/registry/specs/SGIS/multisample.txt GL_SGIS_multisample GL_MULTISAMPLE_SGIS 0x809D GL_SAMPLE_ALPHA_TO_MASK_SGIS 0x809E GL_SAMPLE_ALPHA_TO_ONE_SGIS 0x809F GL_SAMPLE_MASK_SGIS 0x80A0 GL_1PASS_SGIS 0x80A1 GL_2PASS_0_SGIS 0x80A2 GL_2PASS_1_SGIS 0x80A3 GL_4PASS_0_SGIS 0x80A4 GL_4PASS_1_SGIS 0x80A5 GL_4PASS_2_SGIS 0x80A6 GL_4PASS_3_SGIS 0x80A7 GL_SAMPLE_BUFFERS_SGIS 0x80A8 GL_SAMPLES_SGIS 0x80A9 GL_SAMPLE_MASK_VALUE_SGIS 0x80AA GL_SAMPLE_MASK_INVERT_SGIS 0x80AB GL_SAMPLE_PATTERN_SGIS 0x80AC void glSampleMaskSGIS (GLclampf value, GLboolean invert) void glSamplePatternSGIS (GLenum pattern)