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DirectXとを使用するプロジェクトに取り組んでいましたDirect Composition。Windows アクリルぼかしのような同様の効果を作成しようとしています。直接合成を使用して、特定の入力にぼかし効果、彩度、ブレンドを適用することができました。Windowsアクリルぼかしは、ウィンドウの背後のコンテンツをぼかしの入力として使用しますが、win32では不可能なので、ぼかし機能の入力としてデスクトップの背景を使用することにしました. しかし、問題は、ウィンドウの位置に基づいて背景をトリミングできたことですが、ウィンドウを新しい位置に移動すると、新しいウィンドウに基づいてビットマップがトリミングされRECTますが、新しい位置に移動するときにちらつきがあります。

プレビューは次のとおりです。

実際のウィンドウのスクリーンショットは次のとおりです。

窓

ここで、赤いボックスには、ウィンドウ RECT を使用して飽和およびトリミングされたビットマップが含まれています (色の違いを参照してください)。

問題を再現するための簡単なコードを次に示します。

#ifndef UNICODE
#define UNICODE
#endif 
#include <windows.h>
#include <wrl.h>
#include <dxgi1_3.h>
#include <d3d11_2.h>
#include <d2d1_2.h>
#include <d2d1_1.h>
#include <d2d1_2helper.h>
#include <dcomp.h>
#include <dwmapi.h>
#include <wincodec.h>

#pragma comment(lib, "dxgi")
#pragma comment(lib, "d3d11")
#pragma comment(lib, "d2d1")
#pragma comment(lib, "dwmapi")
#pragma comment(lib, "dxguid")
#pragma comment(lib, "dcomp")

using namespace Microsoft::WRL;

LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);

ComPtr<ID3D11Device> direct3dDevice;
ComPtr<IDXGIDevice> dxgiDevice;
ComPtr<IDXGIFactory2> dxFactory;
ComPtr<IDXGISwapChain1> swapChain;
ComPtr<ID2D1Factory2> d2Factory;
ComPtr<ID2D1Device1> d2Device;
ComPtr<IDCompositionTarget> target;
ComPtr<ID2D1DeviceContext> dc;


//Direct Composition Device,Visual
ComPtr<IDCompositionDevice> dcompDevice;
ComPtr<IDCompositionDevice3> dcompDevice3;
ComPtr<IDCompositionVisual> visual;

//Direct Composition Effects
ComPtr<IDCompositionGaussianBlurEffect> blur;
ComPtr<IDCompositionSaturationEffect> saturation;

IWICImagingFactory* d2dWICFactory = NULL;
IWICBitmapDecoder* d2dDecoder = NULL;
IWICFormatConverter* d2dConverter = NULL;
IWICBitmapFrameDecode* d2dBmpSrc = NULL;
ID2D1Bitmap* d2dBmp = NULL;

HWND hwnd;
RECT windowRect;

void LoadBackground();
void Render();

struct ComException
{
    HRESULT result;
    ComException(HRESULT const value) : result(value)
    {}
};
void HR(HRESULT const result)
{
    if (S_OK != result)
    {
        throw ComException(result);
    }
}

void CreateDevice(HWND hwnd)
{
    
    HR(D3D11CreateDevice(nullptr,    // Adapter
        D3D_DRIVER_TYPE_HARDWARE,
        nullptr,    // Module
        D3D11_CREATE_DEVICE_BGRA_SUPPORT,
        nullptr, 0, // Highest available feature level
        D3D11_SDK_VERSION,
        &direct3dDevice,
        nullptr,    // Actual feature level
        nullptr));  // Device context

    HR(direct3dDevice.As(&dxgiDevice));
    HR(CreateDXGIFactory2(
        DXGI_CREATE_FACTORY_DEBUG,
        __uuidof(dxFactory),
        reinterpret_cast<void**>(dxFactory.GetAddressOf())));

    DXGI_SWAP_CHAIN_DESC1 description = {};

    description.Format = DXGI_FORMAT_B8G8R8A8_UNORM;
    description.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
    description.SwapEffect = DXGI_SWAP_EFFECT_FLIP_SEQUENTIAL;
    description.BufferCount = 2;
    description.SampleDesc.Count = 1;
    description.AlphaMode = DXGI_ALPHA_MODE_PREMULTIPLIED;

    RECT rect = {};
    GetClientRect(hwnd, &rect);
    description.Width = rect.right - rect.left;
    description.Height = rect.bottom - rect.top;
 
    HR(dxFactory->CreateSwapChainForComposition(dxgiDevice.Get(),&description,nullptr,swapChain.GetAddressOf()));

    D2D1_FACTORY_OPTIONS const options = { D2D1_DEBUG_LEVEL_INFORMATION };

    HR(D2D1CreateFactory(D2D1_FACTORY_TYPE_SINGLE_THREADED,options,d2Factory.GetAddressOf()));

    HR(d2Factory->CreateDevice(dxgiDevice.Get(),d2Device.GetAddressOf()));

    HR(d2Device->CreateDeviceContext(D2D1_DEVICE_CONTEXT_OPTIONS_NONE,dc.GetAddressOf()));

    ComPtr<IDXGISurface2> surface;
    HR(swapChain->GetBuffer(0,__uuidof(surface),reinterpret_cast<void**>(surface.GetAddressOf())));

    D2D1_BITMAP_PROPERTIES1 properties = {};
    properties.pixelFormat.alphaMode = D2D1_ALPHA_MODE_PREMULTIPLIED;
    properties.pixelFormat.format = DXGI_FORMAT_B8G8R8A8_UNORM;
    properties.bitmapOptions = D2D1_BITMAP_OPTIONS_TARGET | D2D1_BITMAP_OPTIONS_CANNOT_DRAW;

    ComPtr<ID2D1Bitmap1> bitmap;
    HR(dc->CreateBitmapFromDxgiSurface(surface.Get(),properties,bitmap.GetAddressOf()));
    LoadBackground(); // loads my desktop background to d2dBmp using WIC
    dc->SetTarget(bitmap.Get());

    Render(); //render once

   //Creating Direct Compostion Devices and Visual

    HR(DCompositionCreateDevice(dxgiDevice.Get(),__uuidof(dcompDevice),reinterpret_cast<void**>(dcompDevice.GetAddressOf())));
    HR(DCompositionCreateDevice3(dxgiDevice.Get(), __uuidof(dcompDevice),reinterpret_cast<void**>(dcompDevice.GetAddressOf())));
    HR(dcompDevice->QueryInterface(__uuidof(IDCompositionDevice3), (LPVOID*)&dcompDevice3)); // use IDCompositionDevice3 here
   
    HR(dcompDevice3->CreateSaturationEffect(saturation.GetAddressOf()));
    HR(dcompDevice3->CreateGaussianBlurEffect(blur.GetAddressOf()));

    //setting effect properties
    blur->SetStandardDeviation(30.0f); // blur amount
    blur->SetBorderMode(D2D1_BORDER_MODE_HARD);
    saturation->SetSaturation(2.0f); //saturationamount

    HR(dcompDevice->CreateTargetForHwnd(hwnd,true,target.GetAddressOf()));

    blur->SetInput(NULL, bitmap.Get(), NULL);
    saturation->SetInput(NULL, blur.Get(), NULL);

    HR(dcompDevice->CreateVisual(visual.GetAddressOf()));
    HR(visual->SetContent(swapChain.Get()));
    visual->SetEffect(saturation.Get());
    HR(target->SetRoot(visual.Get()));
    HR(dcompDevice->Commit());

}

void LoadBackground()
{
    HR(CoCreateInstance(CLSID_WICImagingFactory, NULL, CLSCTX_INPROC_SERVER, __uuidof(IWICImagingFactory), (void**)(&d2dWICFactory)));
    HR(d2dWICFactory->CreateDecoderFromFilename(L"C:/Users/selas/Downloads/wallpaper.jpg", NULL, GENERIC_READ, WICDecodeMetadataCacheOnLoad, &d2dDecoder));
    HR(d2dWICFactory->CreateFormatConverter(&d2dConverter));
    HR(d2dDecoder->GetFrame(0, &d2dBmpSrc));
    HR(d2dConverter->Initialize(d2dBmpSrc, GUID_WICPixelFormat32bppPBGRA, WICBitmapDitherTypeNone, NULL, 0.f, WICBitmapPaletteTypeMedianCut));
    HR(dc->CreateBitmapFromWicBitmap(d2dConverter, NULL, &d2dBmp));
}

void Render()
{
    if (dc)
    {
        dc->BeginDraw();
        dc->Clear();
        D2D1_POINT_2F offset = D2D1::Point2F(0, 0);
        D2D1_RECT_F imgRect = D2D1::RectF(windowRect.left, windowRect.top, windowRect.right, windowRect.bottom);
        dc->DrawImage(d2dBmp, offset, imgRect, D2D1_INTERPOLATION_MODE_LINEAR, D2D1_COMPOSITE_MODE_SOURCE_OVER);
        HR(dc->EndDraw());
        HR(swapChain->Present(1, 0));
    }

}

int WINAPI wWinMain(HINSTANCE hInstance, HINSTANCE, PWSTR pCmdLine, int nCmdShow)
{
    // Register the window class.
    const wchar_t CLASS_NAME[] = L"Sample Window Class";

    WNDCLASS wc = { };

    wc.lpfnWndProc = WindowProc;
    wc.hInstance = hInstance;
    wc.lpszClassName = CLASS_NAME;

    RegisterClass(&wc);

    // Create the window.

    hwnd = CreateWindowEx(WS_EX_NOREDIRECTIONBITMAP,
        wc.lpszClassName, L"Sample",
        WS_OVERLAPPEDWINDOW | WS_VISIBLE,
        CW_USEDEFAULT, CW_USEDEFAULT,
        500, 500,
        nullptr, nullptr, hInstance, nullptr);

    if (hwnd == NULL)
    {
        return 0;
    }
    
    CreateDevice(hwnd);
    ShowWindow(hwnd, nCmdShow);

    MSG msg = { };
    while (GetMessage(&msg, NULL, 0, 0))
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }

    return 0;
}


LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
    switch (uMsg)
    {
        case WM_MOVING:
        {
            GetWindowRect(hwnd, &windowRect);
            Render();
            return 0;
        }
        

        case WM_PAINT:
        {
            PAINTSTRUCT ps;
            HDC hdc = BeginPaint(hwnd, &ps);
            FillRect(hdc, &ps.rcPaint, (HBRUSH)(COLOR_WINDOW + 1));
            EndPaint(hwnd, &ps);
            return 0;
        }

        case WM_DESTROY:
        {
            PostQuitMessage(0);
            d2dWICFactory->Release();
            d2dDecoder->Release();
            d2dConverter->Release();
            d2dBmpSrc->Release();
            d2dBmp->Release();
        }
        return 0;
    }
    return DefWindowProc(hwnd, uMsg, wParam, lParam);
}

Please don't forget to replace "C:/Users/selas/Downloads/wallpaper.jpg" with your desktop wallpaper

注: サンプル ビデオは実際に編集されたものであり、私が得た出力ではありません。

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