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