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Fallback to the built-in JPEG decoder if 'JpegStream', in src/display/api.js, fails to load the image

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This works by making `PartialEvaluator.buildPaintImageXObject` wait for the success/failure of `loadJpegStream` on the API side *before* parsing continues.

Please note that in practice, it should be quite rare for the browser to fail loading/decoding of a JPEG image. In the general case, it should thus not be completely surprising if even `src/core/jpg.js` will fail to decode the image.
This commit is contained in:
Jonas Jenwald 2018-02-01 16:43:10 +01:00
parent 76afe1018b
commit 80441346a3
2 changed files with 43 additions and 19 deletions
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10
src/display/api.js
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@ -1817,22 +1817,22 @@ var WorkerTransport = (function WorkerTransportClosure() {
switch (type) {
case 'JpegStream':
imageData = data[3];
new Promise((resolve, reject) => {
return new Promise((resolve, reject) => {
const img = new Image();
img.onload = function() {
resolve(img);
};
img.onerror = function() {
reject(new Error('Error during JPEG image loading'));
// Note that when the browser image loading/decoding fails,
// we'll fallback to the built-in PDF.js JPEG decoder; see
// `PartialEvaluator.buildPaintImageXObject` in the
// `src/core/evaluator.js` file.
};
img.src = imageData;
}).then((img) => {
pageProxy.objs.resolve(id, img);
}, (reason) => {
warn(reason);
pageProxy.objs.resolve(id, null);
});
break;
case 'Image':
imageData = data[3];
pageProxy.objs.resolve(id, imageData);