1546823 - Use DirectComposition for WebGL on Windows

Status: NEW

(Core :: Graphics: WebRender, enhancement, P2)

Description

[Sotaro Ikeda [:sotaro]]

We want a way to directly composite WebGL frames if possible with DirectComposition.

Comment 1

[Sotaro Ikeda [:sotaro]]

Attachment: temporal patch - Test DCompositionSurface usage than SwapChain

The temporal patch implements DCompositionSurface usage than SwapChain.
When DCompositionSurface was used, rendering was slide down a bit. Origin of y seems different.

Comment 2

[Sotaro Ikeda [:sotaro]]

Attachment: temporal patch - Test if CopyResource works

The patch test if the following copy function works for copying data from WebGL's D3D11Texture2D to SwapBuffer's D3D11Texture2D. But it did not work :( From the result, it seems better to use Bug 1575159 instead of this bug for WebGL :(

• ID3D11DeviceContext::CopyResource
• ID3D11DeviceContext::CopySubresourceRegion

Comment 3

[Jeff Muizelaar [:jrmuizel]]

(In reply to Sotaro Ikeda [:sotaro] from comment #2)

Created attachment 9088288 [details] [diff] [review]
temporal patch - Test if CopyResource works

The patch test if the following copy function works for copying data from WebGL's D3D11Texture2D to SwapBuffer's D3D11Texture2D. But it did not work :( From the result, it seems better to use Bug 1575159 instead of this bug for WebGL :(

• ID3D11DeviceContext::CopyResource
• ID3D11DeviceContext::CopySubresourceRegion

Is this because the textures are using different D3DDevices?

Comment 4

[Sotaro Ikeda [:sotaro]]

(In reply to Jeff Muizelaar [:jrmuizel] from comment #3)

Is this because the textures are using different D3DDevices?

It might be related. But we do not know it. CopyResource and CopySubresourceRegion do not return error.

Comment 5

[Sotaro Ikeda [:sotaro]]

If WebGL operation happens in GPU process(Bug 1477756), WebGL rendering could be done directly to dc layer(SwapChain).