diff options
| -rw-r--r-- | converter/other/pngx.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/converter/other/pngx.c b/converter/other/pngx.c index b96857e9..d900342f 100644 --- a/converter/other/pngx.c +++ b/converter/other/pngx.c @@ -475,6 +475,11 @@ pngx_setInterlaceHandling(struct pngx * const pngxP) { Also, documentation says this returns 7 if the compressor is interlacing, but it always returns 1 in practice. + + If the program does 1 pass as directed by libpng, the image won't + decompress - libpng says "Not enough image data". If the program does + 7 passes as makes sense, the image won't decompress because "too many + IDAT's found." */ pngxP->numPassesRequired = png_set_interlace_handling(pngxP->png_ptr); } |