epub.py 文件源码

def copy_image_files_pil(self):
        """Copy images using the PIL.
        The method tries to read and write the files with the PIL,
        converting the format and resizing the image if necessary/possible.
        """
        ensuredir(path.join(self.outdir, self.imagedir))
        for src in self.app.status_iterator(self.images, 'copying images... ',
                                            brown, len(self.images)):
            dest = self.images[src]
            try:
                img = Image.open(path.join(self.srcdir, src))
            except IOError:
                if not self.is_vector_graphics(src):
                    self.warn('cannot read image file %r: copying it instead' %
                              (path.join(self.srcdir, src), ))
                try:
                    copyfile(path.join(self.srcdir, src),
                             path.join(self.outdir, self.imagedir, dest))
                except (IOError, OSError) as err:
                    self.warn('cannot copy image file %r: %s' %
                              (path.join(self.srcdir, src), err))
                continue
            if self.config.epub_fix_images:
                if img.mode in ('P',):
                    # See PIL documentation for Image.convert()
                    img = img.convert()
            if self.config.epub_max_image_width > 0:
                (width, height) = img.size
                nw = self.config.epub_max_image_width
                if width > nw:
                    nh = (height * nw) / width
                    img = img.resize((nw, nh), Image.BICUBIC)
            try:
                img.save(path.join(self.outdir, self.imagedir, dest))
            except (IOError, OSError) as err:
                self.warn('cannot write image file %r: %s' %
                          (path.join(self.srcdir, src), err))