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| from io import BytesIO | |
| from PIL import Image | |
| def scale_image_max_width(image_bytes, max_width): | |
| """Scale ``image`` to honor the ``max_width`` constraint. | |
| """ | |
| image = Image.open(BytesIO(image_bytes)) | |
| if image.width > max_width: | |
| factor = image.width / max_width | |
| resized = image.resize( | |
| (int(image.width / factor), int(image.height / factor))) | |
| result = BytesIO() | |
| resized.save(result, 'PNG') | |
| result.flush() | |
| result.seek(0) | |
| return result.read() | |
| else: | |
| return image_bytes |
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