by XnTriq (Posted Sat Oct 15, 2016 4:00 am)
Welcome to the forum, ClausWARE.
It seems that we can only manually convert a PNG-8 with index transparency to an 32-bit PNG with alpha channel transparency.
With the exception of Add alpha, there's no command for increasing the color depth to 32-bit in XnView Classic's batch processing. The same goes for XnViewMP's and XnConvert's Change color depth action: If set to 32 bits, existing single color transparency is lost and replaced by a uniform alpha channel.
PNG test suites:
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Welcome to the forum, ClausWARE.
It seems that we can only manually convert a PNG-8 with index transparency to an 32-bit PNG with alpha channel transparency.
With the exception of Add alpha, there's no command for increasing the color depth to 32-bit in XnView Classic's batch processing. The same goes for XnViewMP's and XnConvert's Change color depth action: If set to 32 bits, existing single color transparency is lost and replaced by a uniform alpha channel.
PNG test suites:
- schaik.com
- libpng.org
- http://www.libpng.org/pub/png/PngSuite/tbbn3p08.png
- http://www.libpng.org/pub/png/PngSuite/tbgn3p08.png
- http://www.libpng.org/pub/png/PngSuite/tbwn3p08.png
- http://www.libpng.org/pub/png/PngSuite/tbyn3p08.png
- http://www.libpng.org/pub/png/PngSuite/tp0n3p08.png
- http://www.libpng.org/pub/png/PngSuite/tp1n3p08.png
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