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gpui: Improve path rendering & global multisample anti-aliasing (#29718)

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Currently, the rendering path required creating a texture for each path,
which wasted a large amount of video memory. In our application, simply
drawing some charts resulted in video memory usage as high as 5G.

I removed the step of creating path textures and directly drew the paths
on the rendering target, adding post-processing global multi-sampling
anti-aliasing. Drawing paths no longer requires allocating any
additional video memory and also improves the performance of path
rendering.

Release Notes:

- N/A

---------

Co-authored-by: Jason Lee <huacnlee@gmail.com>
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Sunli 2025-07-03 00:41:42 +08:00 • committed by GitHub
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docs/src/linux.md
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@ -148,7 +148,7 @@ On some systems the file `/etc/prime-discrete` can be used to enforce the use of
On others, you may be able to the environment variable `DRI_PRIME=1` when running Zed to force the use of the discrete GPU.
If you're using an AMD GPU and Zed crashes when selecting long lines, try setting the `ZED_PATH_SAMPLE_COUNT=0` environment variable. (See [#26143](https://github.com/zed-industries/zed/issues/26143))
If you're using an AMD GPU and Zed crashes when selecting long lines, try setting the `ZED_SAMPLE_COUNT=0` environment variable. (See [#26143](https://github.com/zed-industries/zed/issues/26143))
If you're using an AMD GPU, you might get a 'Broken Pipe' error. Try using the RADV or Mesa drivers. (See [#13880](https://github.com/zed-industries/zed/issues/13880))