pw-guild-icon-parser/dist/image/converter.js

Parser for Perfect World guild icon lists - converts PNG icons to DDS atlas format with DXT5 compression

import sharp from 'sharp';
export async function validateAndConvertPNG(pngPath) {
    const image = sharp(pngPath);
    const metadata = await image.metadata();
    if (!metadata.width || !metadata.height) {
        throw new Error('Failed to read image dimensions');
    }
    if (metadata.width !== 16 || metadata.height !== 16) {
        throw new Error(`Image must be exactly 16x16 pixels, got ${metadata.width}x${metadata.height}`);
    }
    if (metadata.format !== 'png') {
        throw new Error(`Image must be PNG format, got ${metadata.format}`);
    }
    // Extract RGBA data (ensureAlpha adds alpha channel if missing)
    const rawData = await image
        .ensureAlpha()
        .raw()
        .toBuffer({ resolveWithObject: true });
    // Verify we got RGBA (4 channels)
    if (rawData.info.channels !== 4) {
        throw new Error(`Expected RGBA image (4 channels), got ${rawData.info.channels} channels`);
    }
    return {
        width: metadata.width,
        height: metadata.height,
        data: rawData.data
    };
}
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