video-pc/AvRecorder/capturer/video/wgc/composition.interop.h

#pragma once
#include <guiddef.h>

#include <winrt/Windows.UI.Composition.h>
#include <windows.ui.composition.interop.h>
#include <d2d1_1.h>

inline auto CreateCompositionGraphicsDevice(
    winrt::Windows::UI::Composition::Compositor const& compositor,
    ::IUnknown* device)
{
    winrt::Windows::UI::Composition::CompositionGraphicsDevice graphicsDevice{ nullptr };
    auto compositorInterop = compositor.as<ABI::Windows::UI::Composition::ICompositorInterop>();
    winrt::com_ptr<ABI::Windows::UI::Composition::ICompositionGraphicsDevice> graphicsInterop;
    winrt::check_hresult(compositorInterop->CreateGraphicsDevice(device, graphicsInterop.put()));
    winrt::check_hresult(graphicsInterop->QueryInterface(winrt::guid_of<winrt::Windows::UI::Composition::CompositionGraphicsDevice>(),
        reinterpret_cast<void**>(winrt::put_abi(graphicsDevice))));
    return graphicsDevice;
}

inline void ResizeSurface(
    winrt::Windows::UI::Composition::CompositionDrawingSurface const& surface,
    winrt::Windows::Foundation::Size const& size)
{
    auto surfaceInterop = surface.as<ABI::Windows::UI::Composition::ICompositionDrawingSurfaceInterop>();
    SIZE newSize = {};
    newSize.cx = static_cast<LONG>(std::round(size.Width));
    newSize.cy = static_cast<LONG>(std::round(size.Height));
    winrt::check_hresult(surfaceInterop->Resize(newSize));
}

inline auto SurfaceBeginDraw(
    winrt::Windows::UI::Composition::CompositionDrawingSurface const& surface)
{
    auto surfaceInterop = surface.as<ABI::Windows::UI::Composition::ICompositionDrawingSurfaceInterop>();
    winrt::com_ptr<ID2D1DeviceContext> context;
    POINT offset = {};
    winrt::check_hresult(surfaceInterop->BeginDraw(nullptr, __uuidof(ID2D1DeviceContext), context.put_void(), &offset));
    context->SetTransform(D2D1::Matrix3x2F::Translation((FLOAT)offset.x,(FLOAT) offset.y));
    return context;
}

inline void SurfaceEndDraw(
    winrt::Windows::UI::Composition::CompositionDrawingSurface const& surface)
{
    auto surfaceInterop = surface.as<ABI::Windows::UI::Composition::ICompositionDrawingSurfaceInterop>();
    winrt::check_hresult(surfaceInterop->EndDraw());
}

inline auto CreateCompositionSurfaceForSwapChain(
    winrt::Windows::UI::Composition::Compositor const& compositor,
    ::IUnknown* swapChain)
{
    winrt::Windows::UI::Composition::ICompositionSurface surface{ nullptr };
    auto compositorInterop = compositor.as<ABI::Windows::UI::Composition::ICompositorInterop>();
    winrt::com_ptr<ABI::Windows::UI::Composition::ICompositionSurface> surfaceInterop;
    winrt::check_hresult(compositorInterop->CreateCompositionSurfaceForSwapChain(swapChain, surfaceInterop.put()));
    winrt::check_hresult(surfaceInterop->QueryInterface(winrt::guid_of<winrt::Windows::UI::Composition::ICompositionSurface>(),
        reinterpret_cast<void**>(winrt::put_abi(surface))));
    return surface;
}