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Fix/webp exif little endian (#4061) 

* Fix for isLittleEndian flag in parseExifData.

* Add break after reading first exif chunk in getWebpMetadata.
This commit is contained in:
Greg Wainer 2024-07-19 17:39:04 -05:00 committed by GitHub
parent 6ab8cad22e
commit 11b74147ee
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1 changed files with 2 additions and 1 deletions
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web/scripts/pnginfo.js
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@ -49,7 +49,7 @@ export function getPngMetadata(file) {
function parseExifData(exifData) { function parseExifData(exifData) {
// Check for the correct TIFF header (0x4949 for little-endian or 0x4D4D for big-endian) // Check for the correct TIFF header (0x4949 for little-endian or 0x4D4D for big-endian)
const isLittleEndian = new Uint16Array(exifData.slice(0, 2))[0] === 0x4949; const isLittleEndian = String.fromCharCode(...exifData.slice(0, 2)) === "II";
// Function to read 16-bit and 32-bit integers from binary data // Function to read 16-bit and 32-bit integers from binary data
function readInt(offset, isLittleEndian, length) { function readInt(offset, isLittleEndian, length) {
@ -134,6 +134,7 @@ export function getWebpMetadata(file) {
let index = value.indexOf(':'); let index = value.indexOf(':');
txt_chunks[value.slice(0, index)] = value.slice(index + 1); txt_chunks[value.slice(0, index)] = value.slice(index + 1);
} }
break;
} }
offset += 8 + chunk_length; offset += 8 + chunk_length;