protected static BufferedImage getDestination(
ImageReadParam param, Iterator imageTypes, int width, int height) throws IIOException {
if (imageTypes == null || !imageTypes.hasNext()) {
throw new IllegalArgumentException("imageTypes null or empty!");
}
BufferedImage dest = null;
ImageTypeSpecifier imageType = null;
// If param is non-null, use it
if (param != null) {
// Try to get the image itself
dest = param.getDestination();
if (dest != null) {
return dest;
}
// No image, get the image type
imageType = param.getDestinationType();
}
// No info from param, use fallback image type
if (imageType == null) {
Object o = imageTypes.next();
if (!(o instanceof ImageTypeSpecifier)) {
throw new IllegalArgumentException("Non-ImageTypeSpecifier retrieved from imageTypes!");
}
imageType = (ImageTypeSpecifier) o;
} else {
boolean foundIt = false;
while (imageTypes.hasNext()) {
ImageTypeSpecifier type = (ImageTypeSpecifier) imageTypes.next();
if (type.equals(imageType)) {
foundIt = true;
break;
}
}
if (!foundIt) {
throw new IIOException("Destination type from ImageReadParam does not match!");
}
}
Rectangle srcRegion = new Rectangle(0, 0, 0, 0);
Rectangle destRegion = new Rectangle(0, 0, 0, 0);
computeRegions(param, width, height, null, srcRegion, destRegion);
int destWidth = destRegion.x + destRegion.width;
int destHeight = destRegion.y + destRegion.height;
// Create a new image based on the type specifier
if ((long) destWidth * destHeight > Integer.MAX_VALUE) {
throw new IllegalArgumentException("width*height > Integer.MAX_VALUE!");
}
return imageType.createBufferedImage(destWidth, destHeight);
}
private ImageReadParam decompressParam(ImageReadParam param) {
ImageReadParam decompressParam = decompressor.getDefaultReadParam();
ImageTypeSpecifier imageType = param.getDestinationType();
BufferedImage dest = param.getDestination();
if (isRLELossless() && imageType == null && dest == null)
imageType = createImageType(bitsStored, dataType, true);
decompressParam.setDestinationType(imageType);
decompressParam.setDestination(dest);
return decompressParam;
}