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* Remove unwanted code for writing pngOBATA Akio2021-02-021-13/+0
| | | | | | | | `info_ptr->channels` will be set in the next called `png_set_IHDR()`, so it is no effect. Signed-off-by: OBATA Akio <obache@wizdas.com> (cherry picked from commit b00b5ea1c5e0cecd50b928a5d88b3be8560c18e7)
* Change to use PKG_LIBPNG_VER for libpng version checkOBATA Akio2021-02-021-23/+23
| | | | | | | It is suggested in png.h for applications. Signed-off-by: OBATA Akio <obache@wizdas.com> (cherry picked from commit 2283b5627da2a075591f4376666781b5a4be4c23)
* Fix Qt3 builds with libpng15Timothy Pearson2012-06-021-3/+111
| | | | | This partially closes Bug 683 (cherry picked from commit e278b858739babff5cc19ca81a661e1256d162e7)
* Fix Qt3 compilation against new libpng versionsTimothy Pearson2011-09-121-0/+14
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* Add Qt3 development HEAD versionTimothy Pearson2011-07-101-0/+1242