glReadPixels() generating artifacts

This topic contains 1 reply, has 2 voices, and was last updated by  Joe Davis 5 years, 1 month ago.

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  • #30947

    iceman
    Member

    I have noticed that with the SGX545 driver, glReadPixels() reads the framebuffer prior to it has been rendered to, at sufficiently small viewports. Is this a known driver bug?

    Thanks.
    #36084

    Joe Davis
    Member

    Hi iceman,

    Can you share an image that highlights this problem?

    a glReadPixels() will force the GPU to kick a render. Once the render is complete, the GPU will stall until the CPU has finished its call to glReadPixels() (i.e. the data has been retrieved).

    Thanks,
    Joe

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