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For JPEG images with CMYK-data, ensure that the alpha-component is set correctly when WebAssembly is disabled (issue 19676)

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Jonas Jenwald 2025-03-17 16:15:32 +01:00
parent e37236e9af
commit afb14bdc0b
2 changed files with 17 additions and 0 deletions
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8
src/core/jpg.js
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@ -15,6 +15,7 @@
import { assert, BaseException, warn } from "../shared/util.js";
import { ColorSpaceUtils } from "./colorspace_utils.js";
import { DeviceCmykCS } from "./colorspace.js";
import { grayToRGBA } from "../shared/image_utils.js";
import { readUint16 } from "./core_utils.js";
@ -1349,6 +1350,13 @@ class JpegImage {
_convertCmykToRgba(data) {
ColorSpaceUtils.cmyk.getRgbBuffer(data, 0, data.length / 4, data, 0, 8, 1);
if (ColorSpaceUtils.cmyk instanceof DeviceCmykCS) {
// The alpha-component isn't updated by `DeviceCmykCS`, doing it manually.
for (let i = 3, ii = data.length; i < ii; i += 4) {
data[i] = 255;
}
}
return data;
}