public int getImageDataSize() {
		if (sizeImage == 0) {
			sizeImage = getComputedUncompressedImageDataSize();
		}
		return sizeImage;
	}
Returns the uncompressed image data size.  The default implementation will
return the image data size specified by the header if non-zero, otherwize
a computed data length will be returned based upon getHeight(), getWidth() and
getBitCount().
@return image data size
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/data/BitmapResource.java