f396a5b784
* Adding chroma subsampling for mozjpeg * Adding separate chroma quality. * Preact sometimes removes the inline styles, this fixes it. * Simplifying chroma subsample * Adding comments
49 lines
1.4 KiB
HTML
49 lines
1.4 KiB
HTML
<!doctype html>
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<script src='mozjpeg_enc.js'></script>
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<script>
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const module = mozjpeg_enc();
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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 result = module.encode(image.data, image.width, image.height, {
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quality: 75,
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baseline: false,
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arithmetic: false,
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progressive: true,
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optimize_coding: true,
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smoothing: 0,
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color_space: 3,
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quant_table: 3,
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trellis_multipass: false,
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trellis_opt_zero: false,
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trellis_opt_table: false,
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trellis_loops: 1,
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auto_subsample: true,
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chroma_subsample: 2,
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separate_chroma_quality: false,
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chroma_quality: 75,
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});
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const blob = new Blob([result], {type: 'image/jpeg'});
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const blobURL = URL.createObjectURL(blob);
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const img = document.createElement('img');
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img.src = blobURL;
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document.body.appendChild(img);
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};
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</script>
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