CAOpenGLLayer question (timeInterval)

  • Hello All,

    Hope you aint all sick of these... here's another CAOpenGLLayer
    question. In the method:

    - (void)drawInCGLContext:(CGLContextObj)glContext
                pixelFormat:(CGLPixelFormatObj)pixelFormat
      forLayerTime:(CFTimeInterval)timeInterval
                displayTime:(const CVTimeStamp *)timeStamp

    I implement this and render Quicktime movies via visual contexts...
    all works semi-lovely (I cannot render frames in the past, but thats
    another story), except - sometimes this method is given a timeInterval
    of -1, does anyone know what this means?

    Thanks

    --
    John Clayton
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