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Check OffscreenCanvas support once on the worker-thread

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Currently we repeat the `FeatureTest.isOffscreenCanvasSupported` checks all over the worker-thread code, and with upcoming changes this will become even "worse".

Hence this patch, which changes the *worker-thread* default value for the `isOffscreenCanvasSupported`-parameter to `false` and moves the feature-testing into the `BasePdfManager`-constructor.

*Please note:* This patch is written using the GitHub UI, since I'm currently without a dev machine, so hopefully it works correctly.
This commit is contained in:
Jonas Jenwald 2023-02-27 12:27:28 +01:00 • committed by GitHub
parent 2da2ac492e
commit 45c332110e
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4 changed files with 12 additions and 16 deletions
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7
src/core/pdf_manager.js
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@ -15,6 +15,7 @@
import {
createValidAbsoluteUrl,
FeatureTest,
shadow,
unreachable,
warn,
@ -44,6 +45,12 @@ class BasePdfManager {
this._docId = args.docId;
this._password = args.password;
this.enableXfa = args.enableXfa;
// Check `OffscreenCanvas` support once, rather than repeatedly throughout
// the worker-thread code.
args.evaluatorOptions.isOffscreenCanvasSupported =
args.evaluatorOptions.isOffscreenCanvasSupported &&
FeatureTest.isOffscreenCanvasSupported;
this.evaluatorOptions = args.evaluatorOptions;
}