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Asked: 2026-05-24T05:45:44+00:00

I’ve been writing a program based on the ScreenSnapshot example from apple: http://developer.apple.com/library/mac/#samplecode/OpenGLScreenSnapshot/Introduction/Intro.html and

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I’ve been writing a program based on the ScreenSnapshot example from apple: http://developer.apple.com/library/mac/#samplecode/OpenGLScreenSnapshot/Introduction/Intro.html
and after upgrading from Snow Leopard to Lion my program stopped working. When I checked the example I realized it is not working either.
For some reason glReadPixels function raises the GL_INVALID_FRAMEBUFFER_OPERATION_EXT error (0x0506).

I have reinstalled developer’s tools but no luck. Has anyone made any progress with this issue? Any pointers will be greatly appreciated.

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1 Answer

  1. Editorial Team

    An updated version was posted a few days ago, see this new sample code called ScreenSnapshot. There’s now a dedicated fonction CGDisplayCreateImage. There’s even an accompanying technical Q&A.

    So, a more général answer: follow Apple’s document révisions regularly. (Sorry for extraneous accents over é’s or fonctions… somehow Lion’s spell checker wants to be in French mode.. grr…)

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