1 Reply Latest reply on Feb 20, 2013 10:29 AM by michael_intel

    [bug report] glBlitFramebuffer overwrites MSAA buffer


      I found this bug on windows 7 with HD 4000. Appears to come with HD 3000 too.

      When the gl clear color contains 1 in any channel, the glBlitFramebuffer call seems to overwrite the MSAA buffer, and the next blit becomes black.


      I created a small program (code included) to demonstrate it:








      Tested with the following clear colors:


      1, 1, 1, 1 -> BAD

      1, 0, 0, 1 -> BAD

      1, 0, 0, 0.98 -> GOOD

      1, 1, 1, 0.98 -> GOOD

      0.4, 0.58, 0.93, 1 -> GOOD

        • 1. Re: [bug report] glBlitFramebuffer overwrites MSAA buffer


          Here at Intel we truly appreciate your feedback. I will forward your feedback to our software support and engineering group to work on future generations of this software that may implement better features. We cannot provide an estimated time for this to happen, but your feedback for sure is important and will be forwarded to higher levels of support.


          Thank you one more time for your interest in our products and how to improve their range of features.


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