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[PR #10023] Use DComp surface handle for Swap Chain management #27853

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opened 2026-01-31 09:24:40 +00:00 by claunia · 0 comments
claunia commented 2026-01-31 09:24:40 +00:00
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Original Pull Request: https://github.com/microsoft/terminal/pull/10023

State: closed
Merged: Yes

Summary of the Pull Request

This PR changes the DxEngine to create a swapchain HANDLE, then have the TermControl attach that handle to the SwapChainPanel, rather than returning the swapchain via a IDXGISwapChain1.

I didn't write this code originally, @miniksa helped me out. The original commit was so succinct that I didn't think there was anything else to add or take away.

I'm going to need this for tear-out (#1256), so that I can have the content process create swap chain handles, then duplicate those handles out to the window process that will end up embedding the content.

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PR Checklist

Detailed Description of the Pull Request / Additional comments

This reverts commit c113b65d9b.

That commit reverted 30b8335479

Validation Steps Performed

  • Built and ran the Terminal, it still seems to work
  • Does a TDR still work? or do we need to recreate the handle, or something.
  • Does this work on Win7? I honestly have no idea how DX compatibility works. Presumably, the WPF version uses the ForHwnd path, so this will still work, but I don't know if this will suddenly fail to launch on Win7 or something. Tagging in @miniksa.
**Original Pull Request:** https://github.com/microsoft/terminal/pull/10023 **State:** closed **Merged:** Yes --- ## Summary of the Pull Request This PR changes the DxEngine to create a swapchain HANDLE, then have the TermControl attach _that_ handle to the SwapChainPanel, rather than returning the swapchain via a `IDXGISwapChain1`. I didn't write this code originally, @miniksa helped me out. The original commit was so succinct that I didn't think there was anything else to add or take away. I'm going to need this for tear-out (#1256), so that I can have the content process create swap chain handles, then duplicate those handles out to the window process that will end up embedding the content. ## References * [`DCompositionCreateSurfaceHandle`](https://docs.microsoft.com/en-us/windows/win32/api/dcomp/nf-dcomp-dcompositioncreatesurfacehandle) * [`CreateSwapChainForCompositionSurfaceHandle`](https://docs.microsoft.com/en-us/windows/win32/api/dxgi1_3/nf-dxgi1_3-idxgifactorymedia-createswapchainforcompositionsurfacehandle) * [`CreateSwapChainForComposition`](https://docs.microsoft.com/en-us/windows/win32/api/dxgi1_2/nf-dxgi1_2-idxgifactory2-createswapchainforcomposition) * Tear-out: #1256 * Megathread: #5000 * Project: https://github.com/microsoft/terminal/projects/5 ## PR Checklist * [x] Closes https://github.com/microsoft/terminal/projects/5#card-50760249 * [x] I work here * [ ] Tests added/passed * [n/a] Requires documentation to be updated ## Detailed Description of the Pull Request / Additional comments This reverts commit c113b65d9b15028281f6383909a73dba6af55bfc. That commit reverted 30b833547928d6dcbf88d49df0dbd5b3f6a7c879 ## Validation Steps Performed * [x] Built and ran the Terminal, it still seems to work * [x] Does a TDR still work? or do we need to recreate the handle, or something. * [x] Does this work on Win7? I honestly have no idea how DX compatibility works. Presumably, the WPF version uses the `ForHwnd` path, so this will still work, but I don't know if this will suddenly fail to launch on Win7 or something. Tagging in @miniksa.
claunia added the pull-request label 2026-01-31 09:24:40 +00:00
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