Bun Bun
44 lines
1.7 KiB
JavaScript
44 lines
1.7 KiB
JavaScript
const zlib = require('zlib');
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const fs = require('fs');
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const path = require('path');
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const outDir = process.argv[2] || path.join(__dirname, '..', 'public', 'icons');
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fs.mkdirSync(outDir, { recursive: true });
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function writeChunk(type, data) {
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const chunk = Buffer.concat([Buffer.alloc(4), Buffer.from(type), data, Buffer.alloc(4)]);
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chunk.writeUInt32BE(data.length, 0);
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const crc = zlib.crc32(Buffer.concat([Buffer.from(type), data]));
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chunk.writeUInt32BE(crc >>> 0, 4 + 4 + data.length);
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return chunk;
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}
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function writePng(filename, width, height, r, g, b) {
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const signature = Buffer.from([0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A]);
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const ihdr = Buffer.alloc(13);
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ihdr.writeUInt32BE(width, 0);
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ihdr.writeUInt32BE(height, 4);
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ihdr.writeUInt8(8, 8);
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ihdr.writeUInt8(2, 9);
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ihdr.writeUInt8(0, 10);
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ihdr.writeUInt8(0, 11);
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ihdr.writeUInt8(0, 12);
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const rowLength = 1 + width * 3;
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const imageData = Buffer.alloc(rowLength * height);
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for (let y = 0; y < height; y++) {
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const rowStart = y * rowLength;
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imageData[rowStart] = 0;
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for (let x = 0; x < width; x++) {
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const offset = rowStart + 1 + x * 3;
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imageData[offset] = r;
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imageData[offset + 1] = g;
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imageData[offset + 2] = b;
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}
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}
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const compressed = zlib.deflateSync(imageData);
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const chunks = [signature, writeChunk('IHDR', ihdr), writeChunk('IDAT', compressed), writeChunk('IEND', Buffer.alloc(0))];
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fs.writeFileSync(filename, Buffer.concat(chunks));
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}
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const teal = [0x22, 0xD3, 0xEE];
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writePng(path.join(outDir, 'icon16.png'), 16, 16, ...teal);
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writePng(path.join(outDir, 'icon48.png'), 48, 48, ...teal);
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writePng(path.join(outDir, 'icon128.png'), 128, 128, ...teal);
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console.log('Icons generated');
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