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34 lines
962 B
Python
34 lines
962 B
Python
import Image
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import ImageFile
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import StringIO
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import _webp
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def _accept(prefix):
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return prefix[:4] == "RIFF" and prefix[8:16] == "WEBPVP8 "
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class WebPImageFile(ImageFile.ImageFile):
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format = "WEBP"
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format_description = "WebP image"
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def _open(self):
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self.mode = "RGB"
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data, width, height = _webp.WebPDecodeRGB(self.fp.read())
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self.size = width, height
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self.fp = StringIO.StringIO(data)
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self.tile = [("raw", (0, 0) + self.size, 0, 'RGB')]
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def _save(im, fp, filename):
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if im.mode != "RGB":
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raise IOError("cannot write mode %s as WEBP" % im.mode)
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quality = im.encoderinfo.get("quality", 80)
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data = _webp.WebPEncodeRGB(im.tostring(), im.size[0], im.size[1], im.size[0] * 3, float(quality))
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fp.write(data)
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Image.register_open("WEBP", WebPImageFile, _accept)
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Image.register_save("WEBP", _save)
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Image.register_extension("WEBP", ".webp")
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Image.register_mime("WEBP", "image/webp")
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