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103 lines
3 KiB
C++
103 lines
3 KiB
C++
#include "pch.h"
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#include "DwmSharedSurfaceFrameSource.h"
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#include "App.h"
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#include "DeviceResources.h"
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#include "Logger.h"
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bool DwmSharedSurfaceFrameSource::Initialize() {
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if (!FrameSourceBase::Initialize()) {
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Logger::Get().Error("初始化 FrameSourceBase 失败");
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return false;
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}
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_dwmGetDxSharedSurface = (_DwmGetDxSharedSurfaceFunc*)GetProcAddress(
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GetModuleHandle(L"user32.dll"), "DwmGetDxSharedSurface");
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if (!_dwmGetDxSharedSurface) {
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Logger::Get().Win32Error("获取函数 DwmGetDxSharedSurface 地址失败");
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return false;
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}
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if (!_UpdateSrcFrameRect()) {
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Logger::Get().Error("_UpdateSrcFrameRect 失败");
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return false;
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}
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HWND hwndSrc = App::Get().GetHwndSrc();
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double a, bx, by;
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if (!_GetMapToOriginDPI(hwndSrc, a, bx, by)) {
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Logger::Get().Error("_GetMapToOriginDPI 失败");
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App::Get().SetErrorMsg(ErrorMessages::FAILED_TO_CAPTURE);
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return false;
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}
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Logger::Get().Info(fmt::format("源窗口 DPI 缩放为 {}", 1 / a));
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RECT frameRect = {
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std::lround(_srcFrameRect.left * a + bx),
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std::lround(_srcFrameRect.top * a + by),
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std::lround(_srcFrameRect.right * a + bx),
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std::lround(_srcFrameRect.bottom * a + by)
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};
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if (frameRect.left < 0 || frameRect.top < 0 || frameRect.right < 0
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|| frameRect.bottom < 0 || frameRect.right - frameRect.left <= 0
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|| frameRect.bottom - frameRect.top <= 0
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) {
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Logger::Get().Error("裁剪失败");
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App::Get().SetErrorMsg(ErrorMessages::FAILED_TO_CROP);
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return false;
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}
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_frameInWnd = {
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(UINT)frameRect.left,
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(UINT)frameRect.top,
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0,
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(UINT)frameRect.right,
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(UINT)frameRect.bottom,
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1
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};
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D3D11_TEXTURE2D_DESC desc{};
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desc.Format = DXGI_FORMAT_B8G8R8A8_UNORM;
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desc.Width = frameRect.right - frameRect.left;
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desc.Height = frameRect.bottom - frameRect.top;
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desc.MipLevels = 1;
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desc.ArraySize = 1;
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desc.SampleDesc.Count = 1;
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desc.SampleDesc.Quality = 0;
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desc.BindFlags = D3D11_BIND_SHADER_RESOURCE | D3D11_BIND_UNORDERED_ACCESS;
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HRESULT hr = App::Get().GetDeviceResources().GetD3DDevice()->CreateTexture2D(&desc, nullptr, _output.put());
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if (FAILED(hr)) {
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Logger::Get().ComError("创建 Texture2D 失败", hr);
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return false;
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}
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Logger::Get().Info("DwmSharedSurfaceFrameSource 初始化完成");
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return true;
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}
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FrameSourceBase::UpdateState DwmSharedSurfaceFrameSource::Update() {
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HANDLE sharedTextureHandle = NULL;
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if (!_dwmGetDxSharedSurface(App::Get().GetHwndSrc(),
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&sharedTextureHandle, nullptr, nullptr, nullptr, nullptr)
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|| !sharedTextureHandle
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) {
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Logger::Get().Win32Error("DwmGetDxSharedSurface 失败");
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return UpdateState::Error;
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}
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winrt::com_ptr<ID3D11Texture2D> sharedTexture;
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HRESULT hr = App::Get().GetDeviceResources().GetD3DDevice()
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->OpenSharedResource(sharedTextureHandle, IID_PPV_ARGS(&sharedTexture));
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if (FAILED(hr)) {
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Logger::Get().ComError("OpenSharedResource 失败", hr);
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return UpdateState::Error;
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}
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App::Get().GetDeviceResources().GetD3DDC()
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->CopySubresourceRegion(_output.get(), 0, 0, 0, 0, sharedTexture.get(), 0, &_frameInWnd);
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return UpdateState::NewFrame;
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}
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