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gnu: Add pngquant.

* gnu/packages/image.scm (pngquant): New variable.
wip-texlive-importer
Hartmut Goebel 3 years ago
parent
commit
6b61dea336
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  1. 44
      gnu/packages/image.scm

44
gnu/packages/image.scm

@ -337,6 +337,50 @@ images. This library can significantly reduces file sizes and powers pngquant
and other PNG optimizers.")
(license license:gpl3+)))
(define-public pngquant
(package
(name "pngquant")
(version "2.12.3")
(source
(origin
(method git-fetch)
(uri (git-reference
(url "https://github.com/kornelski/pngquant.git")
(commit version)))
(file-name (git-file-name name version))
(sha256
(base32 "1yiwbcihn4311fpfd568gg8zmmhqwg80jmhbhkb5msiipgd9xv33"))))
(build-system gnu-build-system)
(arguments
`(#:test-target "test"
#:configure-flags
'("--with-openmp" "--with-lcms2")))
(native-inputs
`(("pkg-config" ,pkg-config)))
(inputs
`(("libpng" ,libpng)
("zlib" , zlib)
("lcms" ,lcms)
("libimagequant" ,libimagequant)))
(home-page "https://pngquant.org/")
(synopsis "Utility and library for lossy compressing PNG images")
(description "pngquant is a PNG compressor that significantly reduces file
sizes by converting images to a more efficient 8-bit PNG format with alpha
channel (often 60-80% smaller than 24/32-bit PNG files). Compressed images
are fully standards-compliant and are supported by all web browsers and
operating systems.
Features:
@enumerate
@item High-quality palette generation using a combination of vector
quantization algorithms.
@item Unique adaptive dithering algorithm that adds less noise to images
than the standard Floyd-Steinberg.
@item Easy to integrate with shell scripts, GUIs and server-side software.
@item Fast mode for real-time processing/large numbers of images.
@end enumerate")
(license license:gpl3+)))
(define-public libjpeg
(package
(name "libjpeg")

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