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Expose control over CPU effort for palette PNG #2541

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Lovell Fuller
2021-11-24 17:12:53 +00:00
parent 140eeebb3d
commit 72025051c5
7 changed files with 27 additions and 3 deletions
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1
lib/constructor.js
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@@ -234,6 +234,7 @@ const Sharp = function (input, options) {
pngAdaptiveFiltering: false,
pngPalette: false,
pngQuality: 100,
pngEffort: 7,
pngBitdepth: 8,
pngDither: 1,
jp2Quality: 80,

10
lib/output.js
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@@ -373,6 +373,7 @@ function jpeg (options) {
* @param {boolean} [options.adaptiveFiltering=false] - use adaptive row filtering
* @param {boolean} [options.palette=false] - quantise to a palette-based image with alpha transparency support
* @param {number} [options.quality=100] - use the lowest number of colours needed to achieve given quality, sets `palette` to `true`
* @param {number} [options.effort=7] - CPU effort, between 1 (fastest) and 10 (slowest), sets `palette` to `true`
* @param {number} [options.colours=256] - maximum number of palette entries, sets `palette` to `true`
* @param {number} [options.colors=256] - alternative spelling of `options.colours`, sets `palette` to `true`
* @param {number} [options.dither=1.0] - level of Floyd-Steinberg error diffusion, sets `palette` to `true`
@@ -397,7 +398,7 @@ function png (options) {
}
if (is.defined(options.palette)) {
this._setBooleanOption('pngPalette', options.palette);
} else if (is.defined(options.quality) || is.defined(options.colours || options.colors) || is.defined(options.dither)) {
} else if ([options.quality, options.effort, options.colours, options.colors, options.dither].some(is.defined)) {
this._setBooleanOption('pngPalette', true);
}
if (this.options.pngPalette) {
@@ -408,6 +409,13 @@ function png (options) {
throw is.invalidParameterError('quality', 'integer between 0 and 100', options.quality);
}
}
if (is.defined(options.effort)) {
if (is.integer(options.effort) && is.inRange(options.effort, 1, 10)) {
this.options.pngEffort = options.effort;
} else {
throw is.invalidParameterError('effort', 'integer between 1 and 10', options.effort);
}
}
const colours = options.colours || options.colors;
if (is.defined(colours)) {
if (is.integer(colours) && is.inRange(colours, 2, 256)) {