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)