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Update JpxImage.parseImageProperties to support TypedArray data in IMAGE_DECODERS builds

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Given that the `decode` method only returns the actual image-data, a user would now need to invoke `parseImageProperties` to obtain e.g. the width and height.
This method only accepts `BaseStream`-instances, which are (obviously) not exposed, hence we extend it in IMAGE_DECODERS builds to wrap TypedArray data into the expected format.
This commit is contained in:
Jonas Jenwald 2024-04-20 09:32:36 +02:00
parent 5ad42c13ad
commit 8970786d5b
1 changed files with 8 additions and 0 deletions
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8
src/core/jpx.js
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@ -15,6 +15,7 @@
import { BaseException } from "../shared/util.js"; import { BaseException } from "../shared/util.js";
import OpenJPEG from "../../external/openjpeg/openjpeg.js"; import OpenJPEG from "../../external/openjpeg/openjpeg.js";
import { Stream } from "./stream.js";
class JpxError extends BaseException { class JpxError extends BaseException {
constructor(msg) { constructor(msg) {
@ -39,6 +40,13 @@ class JpxImage {
} }
static parseImageProperties(stream) { static parseImageProperties(stream) {
if (typeof PDFJSDev !== "undefined" && PDFJSDev.test("IMAGE_DECODERS")) {
if (stream instanceof ArrayBuffer || ArrayBuffer.isView(stream)) {
stream = new Stream(stream);
} else {
throw new JpxError("Invalid data format, must be a TypedArray.");
}
}
// No need to use OpenJPEG here since we're only getting very basic // No need to use OpenJPEG here since we're only getting very basic
// information which are located in the first bytes of the file. // information which are located in the first bytes of the file.
let newByte = stream.getByte(); let newByte = stream.getByte();