GL_ARB_sample_locations
https://www.khronos.org/registry/OpenGL/extensions/ARB/ARB_sample_locations.txt
GL_ARB_sample_locations

	GL_SAMPLE_LOCATION_ARB 0x8E50
	GL_SAMPLE_LOCATION_SUBPIXEL_BITS_ARB 0x933D
	GL_SAMPLE_LOCATION_PIXEL_GRID_WIDTH_ARB 0x933E
	GL_SAMPLE_LOCATION_PIXEL_GRID_HEIGHT_ARB 0x933F
	GL_PROGRAMMABLE_SAMPLE_LOCATION_TABLE_SIZE_ARB 0x9340
	GL_PROGRAMMABLE_SAMPLE_LOCATION_ARB 0x9341
	GL_FRAMEBUFFER_PROGRAMMABLE_SAMPLE_LOCATIONS_ARB 0x9342
	GL_FRAMEBUFFER_SAMPLE_LOCATION_PIXEL_GRID_ARB 0x9343
	void glFramebufferSampleLocationsfvARB (GLenum target, GLuint start, GLsizei count, const GLfloat* v)
	void glNamedFramebufferSampleLocationsfvARB (GLuint framebuffer, GLuint start, GLsizei count, const GLfloat* v)