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feat: load background image in promise

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Arnošt Pleskot 2023-08-02 16:17:23 +02:00
parent b64c3693fe
commit fe17d88b74
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1 changed files with 112 additions and 98 deletions
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210
src/renderer/renderScene.ts
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@ -391,116 +391,124 @@ const addExportBackground = (
normalizedCanvasHeight: number,
svgUrl: string,
rectangleColor: string,
): void => {
const MARGIN = 24;
const BORDER_RADIUS = 12;
): Promise<void> => {
return new Promise((resolve, reject) => {
const MARGIN = 24;
const BORDER_RADIUS = 12;
const ctx = canvas.getContext("2d") as CanvasRenderingContext2D;
const ctx = canvas.getContext("2d") as CanvasRenderingContext2D;
// Create a new image object
const img = new Image();
// Create a new image object
const img = new Image();
// When the image has loaded
img.onload = (): void => {
// Scale image to fill canvas and draw it onto the canvas
ctx.save();
ctx.beginPath();
if (ctx.roundRect) {
ctx.roundRect(
0,
0,
normalizedCanvasWidth,
normalizedCanvasHeight,
BORDER_RADIUS,
);
} else {
roundRect(
ctx,
0,
0,
normalizedCanvasWidth,
normalizedCanvasHeight,
BORDER_RADIUS,
);
}
const scale = Math.max(
normalizedCanvasWidth / img.width,
normalizedCanvasHeight / img.height,
);
const x = (normalizedCanvasWidth - img.width * scale) / 2;
const y = (normalizedCanvasHeight - img.height * scale) / 2;
ctx.clip();
ctx.drawImage(img, x, y, img.width * scale, img.height * scale);
ctx.closePath();
ctx.restore();
// Create shadow similar to the CSS box-shadow
const shadows = [
{
offsetX: 0,
offsetY: 0.7698959708213806,
blur: 1.4945039749145508,
alpha: 0.02,
},
{
offsetX: 0,
offsetY: 1.1299999952316284,
blur: 4.1321120262146,
alpha: 0.04,
},
{
offsetX: 0,
offsetY: 4.130000114440918,
blur: 9.94853401184082,
alpha: 0.05,
},
{ offsetX: 0, offsetY: 13, blur: 33, alpha: 0.07 },
];
shadows.forEach((shadow, index): void => {
// When the image has loaded
img.onload = (): void => {
// Scale image to fill canvas and draw it onto the canvas
ctx.save();
ctx.beginPath();
ctx.shadowColor = `rgba(0, 0, 0, ${shadow.alpha})`;
ctx.shadowBlur = shadow.blur;
ctx.shadowOffsetX = shadow.offsetX;
ctx.shadowOffsetY = shadow.offsetY;
if (ctx.roundRect) {
ctx.roundRect(
MARGIN,
MARGIN,
normalizedCanvasWidth - MARGIN * 2,
normalizedCanvasHeight - MARGIN * 2,
0,
0,
normalizedCanvasWidth,
normalizedCanvasHeight,
BORDER_RADIUS,
);
} else {
roundRect(
ctx,
MARGIN,
MARGIN,
normalizedCanvasWidth - MARGIN * 2,
normalizedCanvasHeight - MARGIN * 2,
0,
0,
normalizedCanvasWidth,
normalizedCanvasHeight,
BORDER_RADIUS,
);
}
if (index === shadows.length - 1) {
ctx.fillStyle = rectangleColor;
ctx.fill();
}
const scale = Math.max(
normalizedCanvasWidth / img.width,
normalizedCanvasHeight / img.height,
);
const x = (normalizedCanvasWidth - img.width * scale) / 2;
const y = (normalizedCanvasHeight - img.height * scale) / 2;
ctx.clip();
ctx.drawImage(img, x, y, img.width * scale, img.height * scale);
ctx.closePath();
ctx.restore();
});
// Reset shadow properties for future drawings
ctx.shadowColor = "transparent";
ctx.shadowBlur = 0;
ctx.shadowOffsetX = 0;
ctx.shadowOffsetY = 0;
};
// Create shadow similar to the CSS box-shadow
const shadows = [
{
offsetX: 0,
offsetY: 0.7698959708213806,
blur: 1.4945039749145508,
alpha: 0.02,
},
{
offsetX: 0,
offsetY: 1.1299999952316284,
blur: 4.1321120262146,
alpha: 0.04,
},
{
offsetX: 0,
offsetY: 4.130000114440918,
blur: 9.94853401184082,
alpha: 0.05,
},
{ offsetX: 0, offsetY: 13, blur: 33, alpha: 0.07 },
];
// Start loading the image
img.src = svgUrl;
shadows.forEach((shadow, index): void => {
ctx.save();
ctx.beginPath();
ctx.shadowColor = `rgba(0, 0, 0, ${shadow.alpha})`;
ctx.shadowBlur = shadow.blur;
ctx.shadowOffsetX = shadow.offsetX;
ctx.shadowOffsetY = shadow.offsetY;
if (ctx.roundRect) {
ctx.roundRect(
MARGIN,
MARGIN,
normalizedCanvasWidth - MARGIN * 2,
normalizedCanvasHeight - MARGIN * 2,
BORDER_RADIUS,
);
} else {
roundRect(
ctx,
MARGIN,
MARGIN,
normalizedCanvasWidth - MARGIN * 2,
normalizedCanvasHeight - MARGIN * 2,
BORDER_RADIUS,
);
}
if (index === shadows.length - 1) {
ctx.fillStyle = rectangleColor;
ctx.fill();
}
ctx.closePath();
ctx.restore();
});
// Reset shadow properties for future drawings
ctx.shadowColor = "transparent";
ctx.shadowBlur = 0;
ctx.shadowOffsetX = 0;
ctx.shadowOffsetY = 0;
resolve();
};
img.onerror = (): void => {
reject(new Error(`Failed to load image with URL ${svgUrl}`));
};
// Start loading the image
img.src = svgUrl;
});
};
export const _renderScene = ({
@ -558,13 +566,19 @@ export const _renderScene = ({
}
context.save();
if (isExporting && exportBackgroundImage) {
addExportBackground(
canvas,
normalizedCanvasWidth,
normalizedCanvasHeight,
exportBackgroundImage,
renderConfig.viewBackgroundColor,
);
(async () => {
try {
await addExportBackground(
canvas,
normalizedCanvasWidth,
normalizedCanvasHeight,
exportBackgroundImage,
renderConfig.viewBackgroundColor!,
);
} catch (error) {
console.error("Failed to add background:", error);
}
})();
} else {
context.fillStyle = renderConfig.viewBackgroundColor;
context.fillRect(0, 0, normalizedCanvasWidth, normalizedCanvasHeight);