1GL_ARB_multisample 2https://www.khronos.org/registry/OpenGL/extensions/ARB/ARB_multisample.txt 3GL_ARB_multisample 4 5 GL_MULTISAMPLE_ARB 0x809D 6 GL_SAMPLE_ALPHA_TO_COVERAGE_ARB 0x809E 7 GL_SAMPLE_ALPHA_TO_ONE_ARB 0x809F 8 GL_SAMPLE_COVERAGE_ARB 0x80A0 9 GL_SAMPLE_BUFFERS_ARB 0x80A8 10 GL_SAMPLES_ARB 0x80A9 11 GL_SAMPLE_COVERAGE_VALUE_ARB 0x80AA 12 GL_SAMPLE_COVERAGE_INVERT_ARB 0x80AB 13 GL_MULTISAMPLE_BIT_ARB 0x20000000 14 void glSampleCoverageARB (GLclampf value, GLboolean invert) 15