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add quant note to readme

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John Cupitt 2021-11-21 11:39:52 +00:00
parent b889181966
commit ca78abe2ed
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README.md
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@ -227,15 +227,16 @@ is still necessary for save.
If libspng is not present and libpng is, libvips will load PNG files with
libpng. It will always save PNG files with libpng.
### libimagequant
### libimagequant, quantizr
If present, libvips can write 8-bit palette-ised PNGs.
If one of these quantisation packages is present, libvips can write 8-bit
palette-ised PNGs and GIFs.
### ImageMagick, or optionally GraphicsMagick
If available, libvips adds support for loading all libMagick-supported
image file types. Use `--with-magickpackage=GraphicsMagick` to build against
graphicsmagick instead.
If available, libvips adds support for loading and
saving all libMagick-supported image file types. Use
`--with-magickpackage=GraphicsMagick` to build against graphicsmagick instead.
Imagemagick 6.9+ needs to have been built with `--with-modules`. Most packaged
IMs are, I think.