9c7f926d6d70a994c3710ce570bb9807519ef090,lib/matplotlib/backends/backend_agg.py,FigureCanvasAgg,print_png,#FigureCanvasAgg#Any#,456

Before Change

        version_str = (
            "matplotlib version " + __version__ + ", http://matplotlib.org/")
        metadata = OrderedDict({"Software": version_str})
        user_metadata = kwargs.pop("metadata", None)
        if user_metadata is not None:
            metadata.update(user_metadata)

        with cbook._setattr_cm(renderer, dpi=self.figure.dpi), \
                cbook.open_file_cm(filename_or_obj, "wb") as fh:
            _png.write_png(renderer._renderer, fh,

After Change

            **metadata,
        }

        if pil_kwargs is not None:
            from PIL import Image
            from PIL.PngImagePlugin import PngInfo
            buf, size = self.print_to_buffer()
            // Only use the metadata kwarg if pnginfo is not set, because the
            // semantics of duplicate keys in pnginfo is unclear.
            if "pnginfo" not in pil_kwargs:
                pnginfo = PngInfo()
                for k, v in metadata.items():
                    pnginfo.add_text(k, v)
                pil_kwargs["pnginfo"] = pnginfo
            pil_kwargs.setdefault("dpi", (self.figure.dpi, self.figure.dpi))
            (Image.frombuffer("RGBA", size, buf, "raw", "RGBA", 0, 1)
             .save(filename_or_obj, format="png", **pil_kwargs))

        else:
            FigureCanvasAgg.draw(self)
            renderer = self.get_renderer()
            with cbook._setattr_cm(renderer, dpi=self.figure.dpi), \
                    cbook.open_file_cm(filename_or_obj, "wb") as fh:
                _png.write_png(renderer._renderer, fh,
                               self.figure.dpi, metadata=metadata)

    def print_to_buffer(self):
        FigureCanvasAgg.draw(self)
        renderer = self.get_renderer()
        with cbook._setattr_cm(renderer, dpi=self.figure.dpi):

Instances