The question of source code

Questions and postings pertaining to the development of ImageMagick, feature enhancements, and ImageMagick internals. ImageMagick source code and algorithms are discussed here. Usage questions which are too arcane for the normal user list should also be posted here.
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Solovei95
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The question of source code

Post by Solovei95 »

Tell us what key file is responsible for JNG?
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magick
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Re: The question of source code

Post by magick »

Try coders/png.c.
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glennrp
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Re: The question of source code

Post by glennrp »

The JNG container is encoded or decoded in coders/png.c and using some
low-level functions in libpng (for encoding and decoding "chunks").

The embedded main JPEG image and JDAA alpha "image" is encoded or
decoded in coders/jpeg.c using libjpeg.

The embedded alpha channel, when conveyed in the PNG IDAT chunk, is
encoded or decoded in coders/png.c using libpng.
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