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Allow parsing png files to fail if thumbnailing is successful (#10308)

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Michael Telatynski 2023-03-07 15:48:23 +00:00 • committed by GitHub
parent 3e340d5906
commit f74867e57b
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2 changed files with 31 additions and 11 deletions
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25
src/ContentMessages.ts
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@ -96,17 +96,22 @@ async function loadImageElement(imageFile: File): Promise<{
// Thus we could slice the file down to only sniff the first 0x1000
// bytes (but this makes extractPngChunks choke on the corrupt file)
const headers = imageFile; //.slice(0, 0x1000);
parsePromise = readFileAsArrayBuffer(headers).then((arrayBuffer) => {
const buffer = new Uint8Array(arrayBuffer);
const chunks = extractPngChunks(buffer);
for (const chunk of chunks) {
if (chunk.name === "pHYs") {
if (chunk.data.byteLength !== PHYS_HIDPI.length) return false;
return chunk.data.every((val, i) => val === PHYS_HIDPI[i]);
parsePromise = readFileAsArrayBuffer(headers)
.then((arrayBuffer) => {
const buffer = new Uint8Array(arrayBuffer);
const chunks = extractPngChunks(buffer);
for (const chunk of chunks) {
if (chunk.name === "pHYs") {
if (chunk.data.byteLength !== PHYS_HIDPI.length) return false;
return chunk.data.every((val, i) => val === PHYS_HIDPI[i]);
}
}
}
return false;
});
return false;
})
.catch((e) => {
console.error("Failed to parse PNG", e);
return false;
});
}
const [hidpi] = await Promise.all([parsePromise, imgPromise]);