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Merge pull request #21721 from Snuffleupagus/canvas-SCALE_MATRIX-lazy

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Move `SCALE_MATRIX` into `CanvasGraphics` and initialize its `DOMMatrix` lazily (issue 21720)
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Jonas Jenwald 2026-08-06 14:21:01 +02:00 committed by GitHub
commit 71a3c6a896
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1 changed files with 5 additions and 4 deletions
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src/display/canvas.js
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@ -66,10 +66,6 @@ const EXECUTION_STEPS = 10;
const FULL_CHUNK_HEIGHT = 16; const FULL_CHUNK_HEIGHT = 16;
// Only used in rescaleAndStroke. The goal is to avoid
// creating a new DOMMatrix object each time we need it.
const SCALE_MATRIX = new DOMMatrix();
// Used to get some coordinates. // Used to get some coordinates.
const XY = new Float32Array(2); const XY = new Float32Array(2);
@ -496,6 +492,10 @@ const NORMAL_CLIP = {};
const EO_CLIP = {}; const EO_CLIP = {};
class CanvasGraphics { class CanvasGraphics {
// Only used in rescaleAndStroke. The goal is to avoid
// creating a new DOMMatrix object each time we need it.
static #SCALE_MATRIX = null;
// Knockout group support fields. // Knockout group support fields.
#knockoutGroupLevel = 0; #knockoutGroupLevel = 0;
@ -4320,6 +4320,7 @@ class CanvasGraphics {
ctx.stroke(path); ctx.stroke(path);
return; return;
} }
const SCALE_MATRIX = (CanvasGraphics.#SCALE_MATRIX ??= new DOMMatrix());
const dashes = ctx.getLineDash(); const dashes = ctx.getLineDash();
if (saveRestore) { if (saveRestore) {