PNG's Alpha is mirrored in Y direction?

  • Anonymous - 2003-03-18

    It would appear that the Alpha channel of a PNG image is reversed in the vertical direction.

    When using ilOverlayImage(overImage, 0,0,0), the alpha mask is upside down in the resulting image.  Scaling the image before applying works as expected: the alpha is still upside down.

    This is using the WIn32 1.6.5
    My PNG images are  720x480, RGB with Alpha.
    Anyone else experiencing this?



    • Martin Slater

      Martin Slater - 2003-03-20

      Hi there,

      I'm just starting to get involved with the source here but don't have a much time to work on this but if you want to send me some test code and a test image i'll try and have a look this weekend.



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