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Add an option to enable/disable hardware acceleration (bug 1902012)

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This commit is contained in:
Calixte Denizet 2024-06-12 12:51:51 +02:00
parent 341ff40e74
commit ff6180a4c9
13 changed files with 62 additions and 12 deletions
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13
web/pdf_thumbnail_view.js
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@ -44,6 +44,8 @@ const THUMBNAIL_WIDTH = 98; // px
* @property {Object} [pageColors] - Overwrites background and foreground colors
* with user defined ones in order to improve readability in high contrast
* mode.
* @property {boolean} [enableHWA] - Enables hardware acceleration for
* rendering. The default value is `false`.
*/
class TempImageFactory {
@ -92,6 +94,7 @@ class PDFThumbnailView {
linkService,
renderingQueue,
pageColors,
enableHWA,
}) {
this.id = id;
this.renderingId = "thumbnail" + id;
@ -103,6 +106,7 @@ class PDFThumbnailView {
this.pdfPageRotate = defaultViewport.rotation;
this._optionalContentConfigPromise = optionalContentConfigPromise || null;
this.pageColors = pageColors || null;
this.enableHWA = enableHWA || false;
this.eventBus = eventBus;
this.linkService = linkService;
@ -196,11 +200,14 @@ class PDFThumbnailView {
this.resume = null;
}
#getPageDrawContext(upscaleFactor = 1) {
#getPageDrawContext(upscaleFactor = 1, enableHWA = this.enableHWA) {
// Keep the no-thumbnail outline visible, i.e. `data-loaded === false`,
// until rendering/image conversion is complete, to avoid display issues.
const canvas = document.createElement("canvas");
const ctx = canvas.getContext("2d", { alpha: false });
const ctx = canvas.getContext("2d", {
alpha: false,
willReadFrequently: !enableHWA,
});
const outputScale = new OutputScale();
canvas.width = (upscaleFactor * this.canvasWidth * outputScale.sx) | 0;
@ -340,7 +347,7 @@ class PDFThumbnailView {
}
#reduceImage(img) {
const { ctx, canvas } = this.#getPageDrawContext();
const { ctx, canvas } = this.#getPageDrawContext(1, true);
if (img.width <= 2 * canvas.width) {
ctx.drawImage(