Bug 763171 – dev-python/pyglet-1.5.14 fails to save images in alternative formats

• Status: UNCONFIRMED
• Product: Gentoo Linux

[Description Risto A. Paju 2021-01-02 18:52:30 UTC]

I use the following line from Pyglet docs to save screenshots in my OpenGL applications:

pyglet.image.get_buffer_manager().get_color_buffer().save(shotfile)

I have compiled Pyglet with USE=image to allow multiple image formats (using dev-python/pillow). After updating Pyglet from 1.5.13 to 1.5.14, these formats no longer work. Attempting to save as TGA, for example, fails with the following error:

pyglet.image.codecs.ImageEncodeException: No image encoders are available

Saving as PNG or BMP continues to work in Pyglet 1.5.14, as those formats do not use Pillow.

Note that I recently filed #750107 concerning a very similar issue in Pyglet with Pillow. However, it was fixed in Pyglet 1.5.13.

[Comment 1 Sam James 2021-01-06 07:27:14 UTC]

Does it work if you downgrade? If so, this feels like it needs to go upstream.

[Comment 2 Risto A. Paju 2021-01-06 13:41:47 UTC]

The same error comes up with Pillow versions 7.2.0 and 8.0.1, along with the latest 8.1.0. So this is a different problem from #750107, and something was broken with the Pyglet update from 1.5.13 to 1.5.14.

[Comment 3 Sam James 2021-01-06 13:46:40 UTC]

But downgrading pyglet?

[Comment 4 Risto A. Paju 2021-01-06 14:44:32 UTC]

Pyglet 1.5.13 is working fine with all the aforementioned Pillow versions.

[Comment 5 Michał Górny 2021-03-26 14:23:14 UTC]

Could you test with 1.5.15?

[Comment 6 Risto A. Paju 2021-03-30 23:21:54 UTC]

(In reply to Michał Górny from comment #5)
> Could you test with 1.5.15?

I tested Pyglet 1.5.15 with Pillow 8.1.2 and I get the same error.