Revert rendering changes

[MartinZikmund]

Temporarily reverts #21248, #21189 and #20808

PR Type:

What is the current behavior? 🤔

What is the new behavior? 🚀

PR Checklist ✅

Please check if your PR fulfills the following requirements:

• 📝 Commits must be following the Conventional Commits specification.
• 🧪 Added Runtime tests, UI tests, or a manual test sample for the changes have been added (for bug fixes / features) (if applicable)
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• 🖼️ Validated PR Screenshots Compare Test Run results.
• ❗ Contains NO breaking changes

Other information ℹ️

[Copilot]

Pull Request Overview

This PR reverts rendering-related changes made in commit 9b42c81, specifically targeting rendering improvements that were causing issues. The revert focuses on undoing optimizations and features related to UI rendering performance, picture recording, and frame generation control.

• Reverts picture recording optimization that cached rendering frames in various hosts
• Removes the feature that delayed frame generation until UI tree arrangement completion
• Restores direct rendering approach without intermediate picture caching

Reviewed Changes

Copilot reviewed 25 out of 25 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
src/Uno.UI/UI/Xaml/UIElement.cs	Removes SetEntireSubtreeDirty method implementation
src/Uno.UI/UI/Xaml/Internal/Scaling/XamlIslandRootScale.mux.cs	Comments out call to removed SetEntireSubtreeDirty method
src/Uno.UI/Helpers/SkiaRenderHelper.skia.cs	Reverts to simpler rendering helper methods, removes picture recording
src/Uno.UI/FeatureConfiguration.cs	Removes GenerateNewFramesOnlyWhenUITreeIsArranged configuration
Multiple host files	Removes picture caching and reverts to direct rendering approach
src/Uno.UI.RuntimeTests/Tests/Windows_UI_Xaml_Controls/Given_TextBlock.cs	Removes test case for text binding scenario

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[unodevops]

🤖 Your WebAssembly Skia Sample App stage site is ready! Visit it here: https://unowasmprstaging.z20.web.core.windows.net/pr-21259/wasm-skia-net9/index.html

[unodevops]

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[ramezgerges]

Let's not do that. I have a big refactoring that will clean up everything (to be published tomorrow). Let's only revert for the release and keep master as is.

[unodevops]

🤖 Your Docs stage site is ready! Visit it here: https://unodocsprstaging.z13.web.core.windows.net/pr-21259/docs/index.html

[unodevops]

🤖 Your WebAssembly Skia Sample App stage site is ready! Visit it here: https://unowasmprstaging.z20.web.core.windows.net/pr-21259/wasm-skia-net9/index.html

[unodevops]

⚠️⚠️ The build 173636 has failed on Uno.UI - CI.

[unodevops]

🤖 Your Docs stage site is ready! Visit it here: https://unodocsprstaging.z13.web.core.windows.net/pr-21259/docs/index.html

[unodevops]

🤖 Your WebAssembly Skia Sample App stage site is ready! Visit it here: https://unowasmprstaging.z20.web.core.windows.net/pr-21259/wasm-skia-net9/index.html

[unodevops]

🤖 Your Docs stage site is ready! Visit it here: https://unodocsprstaging.z13.web.core.windows.net/pr-21259/docs/index.html

[unodevops]

🤖 Your WebAssembly Skia Sample App stage site is ready! Visit it here: https://unowasmprstaging.z20.web.core.windows.net/pr-21259/wasm-skia-net9/index.html

[mergify]

backport release/stable/6.2

✅ Backports have been created

Details

• #21279 Revert rendering changes (backport #21259) has been created for branch release/stable/6.2 but encountered conflicts