pdf.py 文件源码

def image_to_pdf(self, img, pdf_path=None, **kwargs):
        """
        Convert image to pdf.
        :param img: image file opened by PIL
        :param pdf_path: path to save pdf
        :param kwargs: any parameter accepted by Image.save i.e. quality
        :return:
        """
        processor = ResizeToFit(width=self.max_size_in_pixels[0], height=self.max_size_in_pixels[1])
        img = processor.process(img)
        # Create a white canvas and paste the image
        final_img_width = min(img.size[0], self.max_size_in_pixels[0])
        final_img_height = min(img.size[1], self.max_size_in_pixels[1])
        tmp_image = Image.new("RGB", (final_img_width, final_img_height), "white")
        margin_left = 0
        margin_top = 0
        tmp_image.paste(img, (margin_left, margin_top,
                              final_img_width, final_img_height))

        # Save the image as .pdf file
        if not pdf_path:
            f = NamedTemporaryFile(delete=False)
            pdf_path = f.name
        tmp_image.save(pdf_path, "PDF", resolution=100.0, **kwargs)
        return pdf_path