Process and convert .svg files in Image

[hannahblair]

Description

We were using PIL to process images in gr.Image() but PIL doesn't support svg files. I've added a lib called cairosvg to allow us to process svg files and it converts the file to png in the preprocess method.

Closes: #6489

import gradio as gr


def identity(image):
    return image

demo = gr.Interface(
    fn=identity,
    inputs=gr.Image(),
    outputs=gr.Image(show_download_button=True),
)

demo.launch()

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---

Install Gradio from this PR

pip install https://gradio-builds.s3.amazonaws.com/b8d34e0af2b3987bc232adebed82b8ab4158a6ef/gradio-4.5.0-py3-none-any.whl

Install Gradio Python Client from this PR

pip install "gradio-client @ git+https://github.com/gradio-app/gradio@b8d34e0af2b3987bc232adebed82b8ab4158a6ef#subdirectory=client/python"

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Process and convert .svg files in Image

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[abidlabs]

Thanks @hannahblair for taking this on. We've been very careful about adding more Python dependencies (actually trying to cut down on our existing ones). This use case is a little too niche to add the cairosvg package as a dependency imo. We could instead:

1. Vendor in the necessary code from the cairosvg into the gradio library (so that we get this functionality without adding an additional dependency)

2. Or if not possible, we change the frontend not to except SVG files either and document the Image component accordingly. We could then publish this as a separate SVGImage componen

[hannahblair]

@abidlabs! Ok good to know! I wasn't 100% if this was the right way to go. I'll consider both options and make the changes!

[whitphx]

There are some ML models whose I/O format is SVG, not raster images, such as arXiv:2306.06094, so allowing passing SVG files directly would be an option which helps such use cases.

[hannahblair]

There are some ML models whose I/O format is SVG, not raster images, such as arXiv:2306.06094, so allowing passing SVG files directly would be an option which helps such use cases.

In light of this, I've removed the svg to png conversion and tweaked the logic just to return the SVG file path. You can upload an SVG and it will retain that format in the output. WDYT?

[abidlabs]

Works great! Thanks so much @hannahblair