export function decodeJpeg(buffer: Uint8Array): Image {
const jpeg = decode(buffer, true);
return new Image(jpeg.width, jpeg.height, {
data: jpeg.data,
kind: ImageKind.RGBA
});
}
fs.readFile(file, function(error: any, data: any) {
if (error) {
callback.call(
thisArg,
new Error("FS: Can't read file " + file + ', error: ' + error),
null,
);
return;
}
// read jpeg
let textureJpeg;
try {
textureJpeg = jpegEngine.decode(data);
} catch (e) {
callback.call(
thisArg,
new Error("JPG: Can't decode file " + file + ', error: ' + e),
null,
);
return;
}
// create png
const texturePng = new pngEngine({
filterType: 0,
width: textureJpeg.width,
height: textureJpeg.height,
});
// convert data from jpg_plugin (rgb) to png_plugin (rgb)
for (let i = 0; i < textureJpeg.data.length; i += 4) {
texturePng.data[i] = textureJpeg.data[i];
texturePng.data[i + 1] = textureJpeg.data[i + 1];
texturePng.data[i + 2] = textureJpeg.data[i + 2];
texturePng.data[i + 3] = textureJpeg.data[i + 3];
}
callback.call(thisArg, null, texturePng);
});