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Enhancement: expose pngsave options requiring libimagequant

See original GitHub issue

https://libvips.github.io/libvips/API/current/VipsForeignSave.html#vips-pngsave

/*
 * @param {Boolean} [options.palette=false] - quantise to a palette-based image with alpha transparency support, requires libimagequant
 * @param {Number} [options.quality=100] - use the lowest number of colours needed to achieve given quality, requires libimagequant
 * @param {Number} [options.colours=256] - maximum number of palette entries, requires libimagequant
 * @param {Number} [options.colors=256] - alternative spelling of `options.colours`, requires libimagequant
 * @param {Number} [options.dither=1.0] - level of Floyd-Steinberg error diffusion, requires libimagequant
/

Please note that the pre-compiled binaries provided by sharp will not include libimagequant. If you require these possible future options then libvips will have to be compiled from source and globally installed.

Issue Analytics

State:
Created 5 years ago
Comments:5 (3 by maintainers)

Top GitHub Comments

7reactions

avishnyakcommented, May 20, 2019

For anyone looking for a precompiled version of this. I will try to maintain one that can be used just by setting an environment variable before doing an npm/yarn install.

Set ENV Variable SHARP_DIST_BASE_URL=https://github.com/avishnyak/sharp-libvips/releases/download/v8.7.4 (or newer version when they are released).

NOTE: This includes libimagequant which is GPL code and I’m only compiling for linux-x64 right now.

Other linux targets are probably simple to add if someone needs it (just open an issue).

1reaction

ArunJRKcommented, Jan 25, 2021

For anyone looking for a precompiled version of this. I will try to maintain one that can be used just by setting an environment variable before doing an npm/yarn install.

Set ENV Variable SHARP_DIST_BASE_URL=https://github.com/avishnyak/sharp-libvips/releases/download/v8.7.4 (or newer version when they are released).

NOTE: This includes libimagequant which is GPL code and I’m only compiling for linux-x64 right now.

Other linux targets are probably simple to add if someone needs it (just open an issue).

Thank you so much 😀😁❤

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