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[api-minor] Remove the WebGL implementation
Reasons for the removal include: - This functionality was always somewhat experimental and has never been enabled by default, partly because of worries about rendering bugs caused by e.g. bad/outdated graphics drivers. - After the initial implementation, in PR 4286 (back in 2014), no additional functionality has been added to the WebGL implementation. - The vast majority of all documents do not benefit from WebGL rendering, since only a couple of *specific* features are supported (e.g. some Soft Masks and Patterns). - There is, and has always been, *zero* test-coverage for the WebGL implementation. - Overall performance, in the PDF.js library, has improved since the experimental WebGL implementation was added. Rather than shipping unused *and* untested code, it seems reasonable to simply remove the WebGL implementation for now; thanks to version control it's always possible to bring back the code should the need ever arise.
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9 changed files with 28 additions and 608 deletions
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@ -73,8 +73,6 @@ const DEFAULT_CACHE_SIZE = 10;
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* @property {boolean} [enablePrintAutoRotate] - Enables automatic rotation of
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* landscape pages upon printing. The default is `false`.
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* @property {string} renderer - 'canvas' or 'svg'. The default is 'canvas'.
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* @property {boolean} [enableWebGL] - Enables WebGL accelerated rendering for
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* some operations. The default value is `false`.
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* @property {boolean} [useOnlyCssZoom] - Enables CSS only zooming. The default
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* value is `false`.
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* @property {number} [maxCanvasPixels] - The maximum supported canvas size in
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@ -194,7 +192,6 @@ class BaseViewer {
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this.renderInteractiveForms = options.renderInteractiveForms !== false;
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this.enablePrintAutoRotate = options.enablePrintAutoRotate || false;
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this.renderer = options.renderer || RendererType.CANVAS;
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this.enableWebGL = options.enableWebGL || false;
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this.useOnlyCssZoom = options.useOnlyCssZoom || false;
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this.maxCanvasPixels = options.maxCanvasPixels;
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this.l10n = options.l10n || NullL10n;
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@ -550,7 +547,6 @@ class BaseViewer {
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imageResourcesPath: this.imageResourcesPath,
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renderInteractiveForms: this.renderInteractiveForms,
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renderer: this.renderer,
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enableWebGL: this.enableWebGL,
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useOnlyCssZoom: this.useOnlyCssZoom,
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maxCanvasPixels: this.maxCanvasPixels,
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l10n: this.l10n,
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