GL_ARM_shader_framebuffer_fetch
https://www.khronos.org/registry/OpenGL/extensions/ARM/ARM_shader_framebuffer_fetch.txt
GL_ARM_shader_framebuffer_fetch

	GL_FETCH_PER_SAMPLE_ARM 0x8F65
	GL_FRAGMENT_SHADER_FRAMEBUFFER_FETCH_MRT_ARM 0x8F66
