Damage tracking / partial present · iced-rs/iced#367

2020-05-29T00:02:34.000Z

[Damage tracking](https://emersion.fr/blog/2019/intro-to-damage-tracking/) allows for power savings by not rerendering regions unchanged between frames. There's actually two optimizations made possible by tracking damage: in the desktop compositor (you just tell it the region) and in the application (a bit more tricky, but e.g. [I've implemented support in WebRender+EGL](https://phabricator.services.mozilla.com/D61062) recently). Doesn't look like wgpu supports passing the `VkPresentRegionKHR` yet, so I've raised an issue for this: https://github.com/gfx-rs/wgpu/issues/682 On the new GL backend though, it should be possible to use `EGL_KHR_swap_buffers_with_damage` ([e.g.](https://phabricator.services.mozilla.com/D51517)). But first, iced should do the actual tracking :)

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説明

Damage tracking allows for power savings by not rerendering regions unchanged between frames. There's actually two optimizations made possible by tracking damage: in the desktop compositor (you just tell it the region) and in the application (a bit more tricky, but e.g. I've implemented support in WebRender+EGL recently).

Doesn't look like wgpu supports passing the VkPresentRegionKHR yet, so I've raised an issue for this: https://github.com/gfx-rs/wgpu/issues/682

On the new GL backend though, it should be possible to use EGL_KHR_swap_buffers_with_damage (e.g.).

But first, iced should do the actual tracking :)

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技術スタック: rust
領域: desktopperformance
Issue 種別: feature
難度: 4
推定時間: over 1 week
活動状況: stale
明確さ: mostly clear
前提条件: rust programminggraphics API knowledge (Vulkan/EGL)familiarity with iced architecturedamage tracking concepts
初心者向け度: 20
調査方針: Start by reading the blog post on damage tracking linked in the issue. Then, examine the wgpu issue #682 for Vulkan presentation region support. Explore the existing GL backend code in iced to see if EGL KHR swap buffers with damage can be used. Understand iced's frame rendering pipeline to determine where to track damage regions. No existing PRs or comments provide additional direction.