Re: Off-by-one bug in libpng16 writes extra zero-length IDAT chunk
Glenn Randers-Pehrson <[email protected]>
| Newsgroups | gmane.comp.graphics.png.devel |
|---|---|
| Message-ID | <CA+PdXcttOKMFDd-F8sUyb=-2Y8g2d7Ji1FuQ-pqrk4hRuTHWeQ@mail.gmail.com> |
Confirmed that libpng-1.6.0 exhibits the bug. I'm using "pngtest"
that comes with libpng; I add the following:
// set compression flags here.
png_set_compression_buffer_size(write_ptr,
(png_size_t)8119);
where the value "8119" is the exact length of the IDAT chunks
in pngout.png after running pngtest. The result is, as expected,
one IDAT with length 8119 followed by an IDAT of length 0.
Glenn
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