Hi David, > The function write_png_rgb_alpha allocates twice as much memory as is > necessary for the smask buffer. The second half of the buffer is left > uninitialized and the whole buffer is copied to the output PDF file. It > only arises with PNG images that have an alpha channel. (I suppose > optipng removes the alpha channel when possible, which is why it made > the problem go away.) > > I think the bug is in texk/web2c/pdftexdir/writepng.c, where a "/ 2" > should be "/ 4"; i.e., 1 in 4 bytes is an alpha byte:
Do you think that an update for testing (in pre-release freeze) is required? Or possible? Norbert -- PREINING Norbert http://www.preining.info Accelia Inc. + JAIST + TeX Live + Debian Developer GPG: 0x860CDC13 fp: F7D8 A928 26E3 16A1 9FA0 ACF0 6CAC A448 860C DC13
