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[egui-wgpu] Do vertex & index buffer in a single copy each (#2820)

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* [egui-wgpu] Do vertex & index buffer in a single copy each
Also, copy uniform buffer only if necessary.
Previously, we did hundreds of small copies via queue.write_buffer which would create a new buffer for each of these copies. Now, there are only two gpu sided copy operations and the memory goes directly to the staging buffer.
In a quick debug test on Rerun this decreased time for the `update_buffer` method from about 0.87ms to 0.37ms!

* fix comparing padding on UniformBuffer in wgpu renderer

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Co-authored-by: Emil Ernerfeldt <emil.ernerfeldt@gmail.com>
This commit is contained in:
Andreas Reich
2023-03-29 19:30:18 +02:00
committed by GitHub
parent 5ccc71415e
commit b1f837ca2f
2 changed files with 111 additions and 61 deletions
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crates/egui-wgpu/CHANGELOG.md
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@@ -4,6 +4,7 @@ All notable changes to the `egui-wgpu` integration will be noted in this file.
## Unreleased
* Add `read_screan_rgba` to the egui-wgpu `Painter`, to allow for capturing the current frame when using wgpu. Used in conjuction with `Frame::request_screenshot`. ([#2676](https://github.com/emilk/egui/pull/2676))
* Improve performance of `update_buffers` ([#2820](https://github.com/emilk/egui/pull/2820))
## 0.21.0 - 2023-02-08
@@ -13,6 +14,7 @@ All notable changes to the `egui-wgpu` integration will be noted in this file.
* `egui-wgpu` now only depends on `epaint` instead of the entire `egui` ([#2438](https://github.com/emilk/egui/pull/2438)).
* `winit::Painter` now supports transparent backbuffer ([#2684](https://github.com/emilk/egui/pull/2684)).
## 0.20.0 - 2022-12-08 - web support
* Renamed `RenderPass` to `Renderer`.
* Renamed `RenderPass::execute` to `RenderPass::render`.