ugoImage.py 文件源码

def parseNpf(self, buffer, imageWidth, imageHeight):
        # Read the header
        sectionLengths = self._readUgarHeader(buffer)
        # Read the palette data (section number 1)
        paletteData = np.frombuffer(buffer.read(roundToPower(sectionLengths[0])), dtype=np.uint16)
        # Read the image data (section number 2)
        imageData = np.frombuffer(buffer.read(sectionLengths[1]), dtype=np.uint8)
        # NPF image data uses 1 byte per 2 pixels, so we need to split that byte into two
        imageData = np.stack((np.bitwise_and(imageData, 0x0f), np.bitwise_and(imageData >> 4, 0x0f)), axis=-1).flatten()
        # Unpack palette colors
        palette = unpackColors(paletteData, useAlpha=False)
        # Convert each pixel from a palette index to full color
        pixels = np.fromiter((palette[i] if i > 0 else 0 for i in imageData), dtype=">u4")
        # Clip the image data and create a Pillow image from it
        return Image.fromarray(self._clipImageData(pixels, (imageWidth, imageHeight)), mode="RGBA")

    # Write the image as an npf to buffer