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Fix ~1 second delay opening new document in Chrome by correctly setting willReadFrequently #2962

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Merged
Keavon merged 2 commits into from
Jul 31, 2025
Merged

Fix ~1 second delay opening new document in Chrome by correctly setting willReadFrequently #2962

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5b82081
Fix ~1 second delay opening new document in Chrome by correctly setti…
Keavon Jul 31, 2025
96ea409
Use willReadFrequently in a couple more places
Keavon Jul 31, 2025
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4 changes: 2 additions & 2 deletions frontend/src/components/panels/Document.svelte
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Original file line number Diff line number Diff line change
Expand Up @@ -241,8 +241,8 @@
`.trim();

if (!rasterizedCanvas) {
rasterizedCanvas = await rasterizeSVGCanvas(svg, width * dpiFactor, height * dpiFactor, "image/png");
rasterizedContext = rasterizedCanvas.getContext("2d") || undefined;
rasterizedCanvas = await rasterizeSVGCanvas(svg, width * dpiFactor, height * dpiFactor);
rasterizedContext = rasterizedCanvas.getContext("2d", { willReadFrequently: true }) || undefined;
}
if (!rasterizedContext) return undefined;

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2 changes: 1 addition & 1 deletion frontend/src/messages.ts
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Expand Up @@ -516,7 +516,7 @@ export class Color {
const canvas = document.createElement("canvas");
canvas.width = 1;
canvas.height = 1;
const context = canvas.getContext("2d");
const context = canvas.getContext("2d", { willReadFrequently: true });
if (!context) return undefined;

context.clearRect(0, 0, 1, 1);
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2 changes: 1 addition & 1 deletion frontend/src/utility-functions/rasterization.ts
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Expand Up @@ -93,7 +93,7 @@ export async function imageToCanvasContext(imageData: ImageBitmapSource): Promis
canvas.width = width;
canvas.height = height;

const context = canvas.getContext("2d");
const context = canvas.getContext("2d", { willReadFrequently: true });
if (!context) throw new Error("Could not create canvas context");
context.drawImage(image, 0, 0, image.width, image.height, 0, 0, width, height);

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