e3b1b08424
* Make WebP decoder use memory views * Update webp_dec README * Port quantizer to memory views as well
42 lines
1.4 KiB
HTML
42 lines
1.4 KiB
HTML
<!doctype html>
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<style>
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canvas {
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image-rendering: pixelated;
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}
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</style>
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<script src='imagequant.js'></script>
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<script>
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const Module = imagequant();
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async function loadImage(src) {
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// Load image
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const img = document.createElement('img');
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img.src = src;
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await new Promise(resolve => img.onload = resolve);
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// Make canvas same size as image
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const canvas = document.createElement('canvas');
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[canvas.width, canvas.height] = [img.width, img.height];
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// Draw image onto canvas
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const ctx = canvas.getContext('2d');
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ctx.drawImage(img, 0, 0);
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return ctx.getImageData(0, 0, img.width, img.height);
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}
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Module.onRuntimeInitialized = async _ => {
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console.log('Version:', Module.version().toString(16));
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const image = await loadImage('../example.png');
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// const rawImage = Module.quantize(image.data, image.width, image.height, 256, 1.0);
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const rawImage = Module.zx_quantize(image.data, image.width, image.height, 1.0);
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console.log('done');
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Module.free_result();
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const imageData = new ImageData(new Uint8ClampedArray(rawImage.buffer), rawImage.width, rawImage.height);
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const canvas = document.createElement('canvas');
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canvas.width = image.width;
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canvas.height = image.height;
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const ctx = canvas.getContext('2d');
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ctx.putImageData(imageData, 0, 0);
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document.body.appendChild(canvas);
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};
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</script>
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