GL_QCOM_texture_foveated_subsampled_layout
https://www.khronos.org/registry/OpenGL/extensions/QCOM/QCOM_texture_foveated_subsampled_layout.txt
GL_QCOM_texture_foveated_subsampled_layout

	GL_FOVEATION_SUBSAMPLED_LAYOUT_METHOD_BIT_QCOM 0x4
	GL_MAX_SHADER_SUBSAMPLED_IMAGE_UNITS_QCOM 0x8FA1