Change Details

- Fixed numerous memory leaks [reference](https://github.com/ImageMagick/ImageMagick/issues). - Properly set image->colorspace in the PNG decoder (previously it was setting image->gamma, but only setting image->colorspace for grayscale and gray-alpha images. [Reference](https://www.imagemagick.org/discourse-server/viewtopic.php?f=3&t=32418). - CVE-2017-11750 Fix improper use of NULL in the JNG decoder. [Reference](https://github.com/ImageMagick/ImageMagick/issues/632). - Added "-define png:ignore-crc" option to PNG decoder. When you know your image has no CRC or ADLER32 errors, this can speed up decoding. It is also helpful in debugging bug reports from "fuzzers". - Off by one error for gradient coder [reference](https://www.imagemagick.org/discourse-server/viewtopic.php?f=3&t=32416) and [reference](https://github.com/ImageMagick/ImageMagick/issues/612). - YUV coder no longer renders streaks [reference](https://github.com/ImageMagick/ImageMagick/issues/612). - Fixed numerous memory leaks [reference](https://github.com/ImageMagick/ImageMagick/issues). - coders/png.c: Initialized quantum_scanline and quantum_info to prevent a bad free [reference](https://github.com/ImageMagick/ImageMagick/issues/621). - Removed write_chunk_from_profile() from coders/png.c because it has not worked at least since version 6.7.6. - Removed many redundant checks before RelinquishMagickMemory(), which is safe to call with a NULL argument. - Added experimental PNG orNT chunk, to store image->orientation. - Removed vpAg chunk write support (we are now writing caNv instead). - Fixed numerous memory leaks [reference](https://github.com/ImageMagick/ImageMagick/issues). - The -monochrome option no longer returns a blank canvas [reference](https://github.com/ImageMagick/ImageMagick/issues/594). - Added caNv, eXIf, and pHYs to the list of PNG chunks to be removed by the "-strip" option. Signed-off-by: Pierre-Yves <pyu@riseup.net>