GL_QCOM_shader_framebuffer_fetch_noncoherent https://www.khronos.org/registry/OpenGL/extensions/QCOM/QCOM_shader_framebuffer_fetch_noncoherent.txt GL_QCOM_shader_framebuffer_fetch_noncoherent GL_FRAMEBUFFER_FETCH_NONCOHERENT_QCOM 0x96A2 void glFramebufferFetchBarrierQCOM (void)