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Ensure PNG bitdepth can be set for non-palette output #3322

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Lovell Fuller
2022-08-22 14:57:12 +01:00
parent e1bc8674fd
commit 3a44748f49
3 changed files with 28 additions and 8 deletions
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16
lib/output.js
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@@ -407,6 +407,14 @@ function png (options) {
if (is.defined(options.adaptiveFiltering)) {
this._setBooleanOption('pngAdaptiveFiltering', options.adaptiveFiltering);
}
const colours = options.colours || options.colors;
if (is.defined(colours)) {
if (is.integer(colours) && is.inRange(colours, 2, 256)) {
this.options.pngBitdepth = bitdepthFromColourCount(colours);
} else {
throw is.invalidParameterError('colours', 'integer between 2 and 256', colours);
}
}
if (is.defined(options.palette)) {
this._setBooleanOption('pngPalette', options.palette);
} else if ([options.quality, options.effort, options.colours, options.colors, options.dither].some(is.defined)) {
@@ -427,14 +435,6 @@ function png (options) {
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)) {
this.options.pngBitdepth = bitdepthFromColourCount(colours);
} else {
throw is.invalidParameterError('colours', 'integer between 2 and 256', colours);
}
}
if (is.defined(options.dither)) {
if (is.number(options.dither) && is.inRange(options.dither, 0, 1)) {
this.options.pngDither = options.dither;