SkiaSharp, DX11 and DirectComposition
Hey, I've been stuck on this issue for a few months now and thought I could ask for help.
That all only works in theory though. I've been trying using Vortice to create a DX11 device and a Swapchain with alpha channel, which I then can later use for SkiaSharp. When trying that, SkiaSharp gave me a
This stuff is, at least in my opinion, heavily under-documented and probably not intended for such specific use cases, however I can not sleep at night and know there must be a solution to this.
I've also tried Angle, same issues. OpenGL is no option as it does not like rendering directly to windows with per pixel alpha (at least I believe so). And Vulkan I think would not like that as well.
I've also attached the code that I've partially written myself. The DirectCompositionContext is mostly copied from the Vortice samples, but I got that to work without throwing errors and outputting (at least I think so) proper handles.
The only thing that I did get working was using DirectX as a backend for SkiaSharp but leaving out the features I need and also swapping the buffers manually to the window using the CPU (which eliminates the reason for GPU accel in the first place)
Also, another note: Sorry if this question sounds absolutely stupid or if I'm simply missing something, but I've been stuck so long on this and just want to get it over with.
Scenario:
I create a plain Win32 window using P/Invokes using SkiaSharp for rendering. I would like to get maximum performance by utilizing GPU acceleration, using DX11 as a SkiaSharp backend and enabling theWS_EX_NOREDIRECTIONBITMAP long in the window styles, while still maintaining compatibility with things like per pixel transparency and mica.The problem:
For that I thought of using DirectComposition in combination with a DX11 device as a backend for SkiaSharp, which is officially supported in the latest version.That all only works in theory though. I've been trying using Vortice to create a DX11 device and a Swapchain with alpha channel, which I then can later use for SkiaSharp. When trying that, SkiaSharp gave me a
SEHException.This stuff is, at least in my opinion, heavily under-documented and probably not intended for such specific use cases, however I can not sleep at night and know there must be a solution to this.
I've also tried Angle, same issues. OpenGL is no option as it does not like rendering directly to windows with per pixel alpha (at least I believe so). And Vulkan I think would not like that as well.
I've also attached the code that I've partially written myself. The DirectCompositionContext is mostly copied from the Vortice samples, but I got that to work without throwing errors and outputting (at least I think so) proper handles.
The only thing that I did get working was using DirectX as a backend for SkiaSharp but leaving out the features I need and also swapping the buffers manually to the window using the CPU (which eliminates the reason for GPU accel in the first place)
Also, another note: Sorry if this question sounds absolutely stupid or if I'm simply missing something, but I've been stuck so long on this and just want to get it over with.
