video.py 文件源码

def load_sprite_from_png(self, filename, addr):
        logging.debug("VRAM: Loading %s at %x", filename, addr)
        reader = png.Reader(filename=filename)
        pic = reader.read()

        self.set_vram_cursor(addr)
        for line in pic[2]:
            i = 0
            word = 0
            for px in line:
                word |= px << i
                i += pic[3]['bitdepth']
                if i > 7:
                    self.write_vram(None, word)
                    i = 0
                    word = 0