mirror of
https://github.com/Blinue/Magpie.git
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117 lines
3.4 KiB
C++
117 lines
3.4 KiB
C++
#include "pch.h"
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#include "GDIFrameSource.h"
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#include "App.h"
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#include "Utils.h"
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extern std::shared_ptr<spdlog::logger> logger;
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bool GDIFrameSource::Initialize() {
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_hwndSrc = App::GetInstance().GetHwndSrc();
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_d3dDC = App::GetInstance().GetRenderer().GetD3DDC();
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const RECT& srcClientRect = App::GetInstance().GetSrcClientRect();
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RECT srcWndRect;
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if (!GetWindowRect(_hwndSrc, &srcWndRect)) {
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SPDLOG_LOGGER_ERROR(logger, MakeWin32ErrorMsg("GetWindowRect 失败"));
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return false;
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}
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_frameInWindow = {
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srcClientRect.left - srcWndRect.left,
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srcClientRect.top - srcWndRect.top,
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srcClientRect.right - srcWndRect.left,
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srcClientRect.bottom - srcWndRect.top
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};
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_srcWndSize = { srcWndRect.right - srcWndRect.left, srcWndRect.bottom - srcWndRect.top };
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_pixels.resize(static_cast<size_t>(_srcWndSize.cx * _srcWndSize.cy * 4));
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D3D11_TEXTURE2D_DESC desc{};
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desc.Format = DXGI_FORMAT_B8G8R8A8_UNORM;
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desc.Width = _frameInWindow.right - _frameInWindow.left;
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desc.Height = _frameInWindow.bottom - _frameInWindow.top;
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desc.Usage = D3D11_USAGE_DYNAMIC;
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desc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;
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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;
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HRESULT hr = App::GetInstance().GetRenderer().GetD3DDevice()->CreateTexture2D(&desc, nullptr, &_output);
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if (FAILED(hr)) {
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SPDLOG_LOGGER_ERROR(logger, MakeComErrorMsg("创建 Texture2D 失败", hr));
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return false;
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}
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return true;
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}
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ComPtr<ID3D11Texture2D> GDIFrameSource::GetOutput() {
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return _output;
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}
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bool GDIFrameSource::Update() {
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HDC hdcSrc = GetWindowDC(_hwndSrc);
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if (!hdcSrc) {
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SPDLOG_LOGGER_ERROR(logger, MakeWin32ErrorMsg("GetWindowDC 失败"));
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return false;
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}
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HDC hdcScreen = GetDC(NULL);
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if (!hdcScreen) {
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SPDLOG_LOGGER_ERROR(logger, MakeWin32ErrorMsg("GetDC 失败"));
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ReleaseDC(_hwndSrc, hdcSrc);
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return false;
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}
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Utils::ScopeExit se([&]() {
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ReleaseDC(_hwndSrc, hdcSrc);
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ReleaseDC(NULL, hdcScreen);
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});
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// 直接获取 DC 中当前图像，而不是使用 BitBlt 复制
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HBITMAP hBmpDest = (HBITMAP)GetCurrentObject(hdcSrc, OBJ_BITMAP);
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if (!hBmpDest) {
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SPDLOG_LOGGER_ERROR(logger, MakeWin32ErrorMsg("GetCurrentObject 失败"));
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return false;
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}
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SIZE frameSize = { _frameInWindow.right - _frameInWindow.left, _frameInWindow.bottom - _frameInWindow.top };
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BITMAPINFO bi{};
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bi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
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bi.bmiHeader.biWidth = _srcWndSize.cx;
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bi.bmiHeader.biHeight = -_srcWndSize.cy;
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bi.bmiHeader.biPlanes = 1;
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bi.bmiHeader.biCompression = BI_RGB;
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bi.bmiHeader.biBitCount = 32;
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bi.bmiHeader.biSizeImage = (DWORD)_pixels.size();
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if (GetDIBits(hdcScreen, hBmpDest, 0, _srcWndSize.cy, _pixels.data(), &bi, DIB_RGB_COLORS) != _srcWndSize.cy) {
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SPDLOG_LOGGER_ERROR(logger, MakeWin32ErrorMsg("GetDIBits 失败"));
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return false;
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}
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// 将客户区的像素复制到 Texture2D 中
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D3D11_MAPPED_SUBRESOURCE ms{};
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HRESULT hr = _d3dDC->Map(_output.Get(), 0, D3D11_MAP_WRITE_DISCARD, 0, &ms);
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if (FAILED(hr)) {
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SPDLOG_LOGGER_ERROR(logger, MakeComErrorMsg("Map 失败", hr));
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return false;
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}
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BYTE* pPixels = _pixels.data() + (_srcWndSize.cx * _frameInWindow.top + _frameInWindow.left) * 4;
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BYTE* pData = (BYTE*)ms.pData;
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for (int i = 0; i < frameSize.cy; ++i) {
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std::memcpy(pData, pPixels, static_cast<size_t>(frameSize.cx * 4));
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pPixels += _srcWndSize.cx * 4;
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pData += ms.RowPitch;
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}
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_d3dDC->Unmap(_output.Get(), 0);
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return true;
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}
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