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Try to remove the mozOpaque canvas-property (PR 6551 follow-up)

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According to MDN, see https://developer.mozilla.org/en-US/docs/Web/API/HTMLCanvasElement/mozOpaque, the `mozOpaque` canvas-property is not only non-standard (obviously) but it's also been deprecated.
Instead it's recommended to use `alpha = false` when getting the canvas-context, see https://developer.mozilla.org/en-US/docs/Web/API/HTMLCanvasElement/getContext#contextattributes, which all of our affected code is already doing.
This commit is contained in:
Jonas Jenwald 2022-05-09 12:25:51 +02:00
parent 38c82357b2
commit af5789125f
5 changed files with 0 additions and 34 deletions
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7
web/pdf_page_view.js
View file

@ -783,13 +783,6 @@ class PDFPageView {
canvasWrapper.appendChild(canvas);
this.canvas = canvas;
if (
typeof PDFJSDev === "undefined" ||
PDFJSDev.test("MOZCENTRAL || GENERIC")
) {
canvas.mozOpaque = true;
}
const ctx = canvas.getContext("2d", { alpha: false });
const outputScale = (this.outputScale = new OutputScale());

14
web/pdf_thumbnail_view.js
View file

@ -51,13 +51,6 @@ class TempImageFactory {
// Since this is a temporary canvas, we need to fill it with a white
// background ourselves. `_getPageDrawContext` uses CSS rules for this.
if (
typeof PDFJSDev === "undefined" ||
PDFJSDev.test("MOZCENTRAL || GENERIC")
) {
tempCanvas.mozOpaque = true;
}
const ctx = tempCanvas.getContext("2d", { alpha: false });
ctx.save();
ctx.fillStyle = "rgb(255, 255, 255)";
@ -225,13 +218,6 @@ class PDFThumbnailView {
// 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");
if (
typeof PDFJSDev === "undefined" ||
PDFJSDev.test("MOZCENTRAL || GENERIC")
) {
canvas.mozOpaque = true;
}
const ctx = canvas.getContext("2d", { alpha: false });
const outputScale = new OutputScale();

6
web/toolbar.js
View file

@ -261,12 +261,6 @@ class Toolbar {
// The temporary canvas is used to measure text length in the DOM.
let canvas = document.createElement("canvas");
if (
typeof PDFJSDev === "undefined" ||
PDFJSDev.test("MOZCENTRAL || GENERIC")
) {
canvas.mozOpaque = true;
}
let ctx = canvas.getContext("2d", { alpha: false });
await animationStarted;