master: fix interlaced PNG input handling with newer libpng versions #1296
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Ooop. Nice! I'll add a test for this. |
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It looks like commit 57ce5a3 prevents interlaced PNG handling working with newer libpng versions.
$ vipsthumbnail interlaced.png (vipsthumbnail:31018): VIPS-WARNING **: 22:37:46.939: bad adaptive filter value vipsthumbnail: unable to thumbnail interlaced.pngThis PR ensures the new call to
png_set_interlace_handlingoccurs before the first call topng_read_update_info.(Calling
png_set_interlace_handlingfor non-interlaced PNG images appears to be OK, or at least is sensibly ignored internally by libpng.)