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Merge pull request #15221 from Snuffleupagus/issue-15220

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Support images with /Filter-entries that contain Arrays (issue 15220)
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Jonas Jenwald 2022-07-25 11:14:51 +02:00 • committed by GitHub
commit 8ebd2d3dfd
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3 changed files with 31 additions and 16 deletions
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38
src/core/image.js
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@ -103,25 +103,31 @@ class PDFImage {
const dict = image.dict;
const filter = dict.get("F", "Filter");
let filterName;
if (filter instanceof Name) {
switch (filter.name) {
case "JPXDecode":
const jpxImage = new JpxImage();
jpxImage.parseImageProperties(image.stream);
image.stream.reset();
image.width = jpxImage.width;
image.height = jpxImage.height;
image.bitsPerComponent = jpxImage.bitsPerComponent;
image.numComps = jpxImage.componentsCount;
break;
case "JBIG2Decode":
image.bitsPerComponent = 1;
image.numComps = 1;
break;
filterName = filter.name;
} else if (Array.isArray(filter)) {
const filterZero = xref.fetchIfRef(filter[0]);
if (filterZero instanceof Name) {
filterName = filterZero.name;
}
}
// TODO cache rendered images?
switch (filterName) {
case "JPXDecode":
const jpxImage = new JpxImage();
jpxImage.parseImageProperties(image.stream);
image.stream.reset();
image.width = jpxImage.width;
image.height = jpxImage.height;
image.bitsPerComponent = jpxImage.bitsPerComponent;
image.numComps = jpxImage.componentsCount;
break;
case "JBIG2Decode":
image.bitsPerComponent = 1;
image.numComps = 1;
break;
}
let width = dict.get("W", "Width");
let height = dict.get("H", "Height");