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Diffstat (limited to 'ChangeLog')
| -rw-r--r-- | ChangeLog | 18 |
1 files changed, 18 insertions, 0 deletions
@@ -1,3 +1,21 @@ +2017-12-25 Jay Berkenbilt <ejb@ql.org> + + * Implement remaining PNG filters for decode. Prior versions could + decode only the "up" filter. Now all PNG filters (sub, up, + average, Paeth, optimal) are supported for decoding. Thanks to + Tobias Hoffmann for providing a test PDF file that has images with + all PNG filters along with different numbers of bits per sample + and samples per pixel, and thanks to Casey Rojas for providing + implementations of the remaining PNG filters. + + The implementation of the remaining PNG filters changed the + interface to the private Pl_PNGFilter class, but this class's + header file is not in the installation, and there is no public + interface to the class. Within the library, the class is never + allocated on the stack; it is only ever dynamically allocated. As + such, this does not actually break binary compatibility of the + library. + 2017-09-15 Jay Berkenbilt <ejb@ql.org> * 7.0.0: release |