Change Details

- 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>

- 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>

- 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>