VCSM and the FBO

[aire39]

assuming a 2048x1024 vcsm buffer because I need to turn it into an opengl texture and so the vcsm buffer needs to be a power of 2 because of the hardware.

When using EGL_IMAGE_BRCM_VCSM to generate an opengl texture do opengl functions like glClear(GL_COLOR_BUFFER_BIT) clear the entire 2048x1024 buffer? if this is the case is there no way to restrict this clear to only a portion of the buffer?

I ask this because the actual incoming frame from the camera is 1280x720 and so I don't need the whole 2048x1024 buffer that the vcsm is providing.

[timg236]

You could use glScissor to restrict the size of the drawing / clearing region

https://www.khronos.org/registry/OpenGL ... cissor.xml