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feat(renderer): make logo optional

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Pihkaal
2024-10-12 17:05:56 +02:00
parent 1dfae1a9f5
commit 7b79354e84
4 changed files with 35 additions and 29 deletions
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50
utils/renderer.ts
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@@ -7,7 +7,7 @@ export const LOGO_PADDING = 1;
export const renderQRCodeToCanvas = async (
canvas: HTMLCanvasElement | Canvas,
content: string,
logoUrl: string,
logoUrl: string | undefined,
) => {
await QRCode.toCanvas(canvas, content, {
errorCorrectionLevel: "H",
@@ -15,31 +15,33 @@ export const renderQRCodeToCanvas = async (
margin: 1,
});
const qrCode = QRCode.create(content, { errorCorrectionLevel: "H" });
const moduleCount = qrCode.modules.size + 2;
if (logoUrl) {
const qrCode = QRCode.create(content, { errorCorrectionLevel: "H" });
const moduleCount = qrCode.modules.size + 2;
const logoImage = await loadImage(logoUrl);
const logoImage = await loadImage(logoUrl);
const moduleSize = CANVAS_SIZE / moduleCount;
const moduleSize = CANVAS_SIZE / moduleCount;
let logoModules = Math.floor(moduleCount * 0.3);
if (logoModules % 2 !== moduleCount % 2) {
logoModules += 1;
let logoModules = Math.floor(moduleCount * 0.3);
if (logoModules % 2 !== moduleCount % 2) {
logoModules += 1;
}
const backgroundSize = logoModules * moduleSize + 1;
const backgroundPosition = (moduleSize * (moduleCount - logoModules)) / 2;
const logoSize = backgroundSize - LOGO_PADDING * 2;
const logoPosition = backgroundPosition + LOGO_PADDING;
const ctx = canvas.getContext("2d") as CanvasRenderingContext2D;
ctx.fillStyle = "white";
ctx.fillRect(
backgroundPosition,
backgroundPosition,
backgroundSize,
backgroundSize,
);
ctx.drawImage(logoImage, logoPosition, logoPosition, logoSize, logoSize);
}
const backgroundSize = logoModules * moduleSize + 1;
const backgroundPosition = (moduleSize * (moduleCount - logoModules)) / 2;
const logoSize = backgroundSize - LOGO_PADDING * 2;
const logoPosition = backgroundPosition + LOGO_PADDING;
const ctx = canvas.getContext("2d") as CanvasRenderingContext2D;
ctx.fillStyle = "white";
ctx.fillRect(
backgroundPosition,
backgroundPosition,
backgroundSize,
backgroundSize,
);
ctx.drawImage(logoImage, logoPosition, logoPosition, logoSize, logoSize);
};