90 lines
2.4 KiB
TypeScript
90 lines
2.4 KiB
TypeScript
'use client';
|
|
|
|
import { useEffect, useRef } from 'react';
|
|
|
|
const RETRY_DELAY = 2000;
|
|
|
|
export default function CanvasBlurCapture({
|
|
imageUrl,
|
|
onCapture,
|
|
width,
|
|
height,
|
|
hidden = true,
|
|
edgeCompensation = 10,
|
|
scale = 0.5,
|
|
quality = 0.9,
|
|
}: {
|
|
imageUrl: string
|
|
onCapture: (blurData: string) => void
|
|
width: number
|
|
height: number
|
|
hidden?: boolean
|
|
edgeCompensation?: number
|
|
scale?: number
|
|
quality?: number
|
|
}) {
|
|
const refCanvas = useRef<HTMLCanvasElement>(null);
|
|
const refTimeouts = useRef<NodeJS.Timeout[]>([]);
|
|
|
|
useEffect(() => {
|
|
const capture = () => {
|
|
const canvas = refCanvas.current;
|
|
if (canvas) {
|
|
canvas.width = width * scale;
|
|
canvas.height = height * scale;
|
|
canvas.style.width = `${width}px`;
|
|
canvas.style.height = `${height}px`;
|
|
const context = refCanvas.current?.getContext('2d');
|
|
if (context) {
|
|
context.scale(scale, scale);
|
|
context.filter =
|
|
'contrast(1.2) saturate(1.2)' +
|
|
`blur(${scale * 10}px)`;
|
|
context.drawImage(
|
|
image,
|
|
-edgeCompensation,
|
|
-edgeCompensation,
|
|
width + edgeCompensation * 2,
|
|
width * image.height / image.width + edgeCompensation * 2,
|
|
);
|
|
refTimeouts.current.forEach(clearTimeout);
|
|
onCapture(canvas.toDataURL('image/jpeg', quality));
|
|
} else {
|
|
console.error('Cannot get 2d context');
|
|
// Retry capture in case canvas is not available
|
|
refTimeouts.current.push(setTimeout(capture, RETRY_DELAY));
|
|
}
|
|
} else {
|
|
console.error('Cannot generate blur data: canvas not found');
|
|
// Retry capture in case canvas is not available
|
|
refTimeouts.current.push(setTimeout(capture, RETRY_DELAY));
|
|
}
|
|
};
|
|
|
|
const image = new Image();
|
|
image.crossOrigin = 'anonymous';
|
|
image.src = imageUrl;
|
|
image.onload = capture;
|
|
|
|
// Attempt delayed capture in case image.onload never fires
|
|
refTimeouts.current.push(setTimeout(capture, RETRY_DELAY));
|
|
|
|
// Store timeout ref to ensure it's closed over
|
|
// in cleanup function (recommended by exhaustive-deps)
|
|
const timeouts = refTimeouts.current;
|
|
return () => timeouts.forEach(clearTimeout);
|
|
}, [
|
|
imageUrl,
|
|
onCapture,
|
|
width,
|
|
height,
|
|
edgeCompensation,
|
|
scale,
|
|
quality,
|
|
]);
|
|
|
|
return (
|
|
<canvas ref={refCanvas} className={hidden ? 'hidden' : undefined} />
|
|
);
|
|
}
|