Question

我有以下功能，我试图将其集成到我的directx 11应用程序中。当我使用directx9时一切正常但是当转换为directx 11时，我在Bitblt线上得到了一个蓝屏死机错误（我必须对HDC做错了吗？）。我想知道将此代码转换为directx 11兼容表面而不是HDC的最佳方法是什么。

这是功能：

void CFlashDXPlayer::DrawFrame(HDC dc)
{
if (m_dirtyFlag)
{
    IViewObject* pViewObject = NULL;
    m_flashInterface->QueryInterface(IID_IViewObject, (LPVOID*) &pViewObject);
    if (pViewObject != NULL)
    {
        // Combine regions
        HRGN unionRgn, first, second = NULL;
        unionRgn = CreateRectRgnIndirect(&m_dirtyRects[0]);
        if (m_dirtyRects.size() >= 2)
            second = CreateRectRgn(0, 0, 1, 1);

        for (std::vector<RECT>::iterator it = m_dirtyRects.begin() + 1; it != m_dirtyRects.end(); ++it)
        {
            // Fill combined region
            first = unionRgn;
            SetRectRgn(second, it->left, it->top, it->right, it->bottom);
            unionRgn = CreateRectRgn(0, 0, 1, 1);

            CombineRgn(unionRgn, first, second, RGN_OR);
            DeleteObject(first);
        }

        if (second)
            DeleteObject(second);

        RECT clipRgnRect; GetRgnBox(unionRgn, &clipRgnRect);
        RECTL clipRect = { 0, 0, m_width, m_height };

        // Fill background
        if (m_transpMode != TMODE_FULL_ALPHA)
        {
            // Set clip region
            SelectClipRgn(dc, unionRgn);

            COLORREF fillColor = GetBackgroundColor();
            HBRUSH fillColorBrush = CreateSolidBrush(fillColor);
            FillRgn(dc, unionRgn, fillColorBrush);
            DeleteObject(fillColorBrush);

            // Draw to main buffer
            HRESULT hr = pViewObject->Draw(DVASPECT_TRANSPARENT, 1, NULL, NULL, NULL, dc, &clipRect, &clipRect, NULL, 0);
            assert(SUCCEEDED(hr));
        }
        else
        {
            if (m_alphaBlackDC == NULL)
            {
                // Create memory buffers
                BITMAPINFOHEADER bih = {0};
                bih.biSize = sizeof(BITMAPINFOHEADER);
                bih.biBitCount = 32;
                bih.biCompression = BI_RGB;
                bih.biPlanes = 1;
                bih.biWidth = LONG(m_width);
                bih.biHeight = -LONG(m_height);

                m_alphaBlackDC = CreateCompatibleDC(dc);
                m_alphaBlackBitmap = CreateDIBSection(m_alphaBlackDC, (BITMAPINFO*)&bih, DIB_RGB_COLORS, (void**)&m_alphaBlackBuffer, 0, 0);
                SelectObject(m_alphaBlackDC, m_alphaBlackBitmap);

                m_alphaWhiteDC = CreateCompatibleDC(dc);
                m_alphaWhiteBitmap = CreateDIBSection(m_alphaWhiteDC, (BITMAPINFO*)&bih, DIB_RGB_COLORS, (void**)&m_alphaWhiteBuffer, 0, 0);
                SelectObject(m_alphaWhiteDC, m_alphaWhiteBitmap);
            }

            HRESULT hr;
            HBRUSH fillColorBrush;

            // Render frame twice - against white and against black background to calculate alpha
            SelectClipRgn(m_alphaBlackDC, unionRgn);

            COLORREF blackColor = 0x00000000;
            fillColorBrush = CreateSolidBrush(blackColor);
            FillRgn(m_alphaBlackDC, unionRgn, fillColorBrush);
            DeleteObject(fillColorBrush);

            hr = pViewObject->Draw(DVASPECT_TRANSPARENT, 1, NULL, NULL, NULL, m_alphaBlackDC, &clipRect, &clipRect, NULL, 0);
            assert(SUCCEEDED(hr));

            // White background
            SelectClipRgn(m_alphaWhiteDC, unionRgn);

            COLORREF whiteColor = 0x00FFFFFF;
            fillColorBrush = CreateSolidBrush(whiteColor);
            FillRgn(m_alphaWhiteDC, unionRgn, fillColorBrush);
            DeleteObject(fillColorBrush);

            hr = pViewObject->Draw(DVASPECT_TRANSPARENT, 1, NULL, NULL, NULL, m_alphaWhiteDC, &clipRect, &clipRect, NULL, 0);
            assert(SUCCEEDED(hr));

            // Combine alpha
            for (LONG y = clipRgnRect.top; y < clipRgnRect.bottom; ++y)
            {
                int offset = y * m_width * 4 + clipRgnRect.left * 4;
                for (LONG x = clipRgnRect.left; x < clipRgnRect.right; ++x)
                {
                    BYTE blackRed = m_alphaBlackBuffer[offset];
                    BYTE whiteRed = m_alphaWhiteBuffer[offset];
                    m_alphaBlackBuffer[offset + 3] = 255 - (whiteRed - blackRed);
                    offset += 4;
                }
            }

            // Blit result to target DC
            BitBlt(dc, clipRgnRect.left, clipRgnRect.top,
                   clipRgnRect.right - clipRgnRect.left,
                   clipRgnRect.bottom - clipRgnRect.top,
                   m_alphaBlackDC, clipRgnRect.left, clipRgnRect.top, SRCCOPY);
        }

        DeleteObject(unionRgn);
        pViewObject->Release();
    }

    m_dirtyFlag = false;
    m_dirtyRects.clear();
    m_dirtyUnionRect.left = m_dirtyUnionRect.top = LONG_MAX;
    m_dirtyUnionRect.right = m_dirtyUnionRect.bottom = -LONG_MAX;
}
}

我传递给此函数的HDC是按以下方式创建的：

D3D11_TEXTURE2D_DESC textureDesc;                  
ZeroMemory(&textureDesc, sizeof(textureDesc));                  
textureDesc.Width = width;                  
textureDesc.Height = height;                  
textureDesc.MipLevels = 1;                  
textureDesc.ArraySize = 1;                  
textureDesc.Format = DXGI_FORMAT_B8G8R8A8_UNORM;                  
textureDesc.SampleDesc.Count = 1;                  
textureDesc.Usage = D3D11_USAGE_DEFAULT;                  
textureDesc.BindFlags = D3D11_BIND_SHADER_RESOURCE | D3D11_BIND_RENDER_TARGET;                  
textureDesc.MiscFlags = D3D11_RESOURCE_MISC_GDI_COMPATIBLE;  
HRESULT hr = device->CreateTexture2D(&textureDesc, NULL, &m_flashTexture); 


HRESULT hResult;
HDC hDC;
IDXGISurface1 *pSurface = NULL; 
hResult = m_flashTexture->QueryInterface(__uuidof(IDXGISurface1), (void**)&pSurface); 
hResult = pSurface->GetDC(TRUE, &hDC);                  
assert(SUCCEEDED(hResult));  
m_flashPlayer->DrawFrame(hDC);

我做错了什么想法？我似乎无法弄清楚发生了什么以及为什么这会出现蓝屏，如果我使用Directx 9 obejcts它不会。有更好的方法吗？

（我也试过更新我的驱动程序，它们都是最新的。）

感谢您的帮助。

Answer 1

事实证明这确实是一个驱动问题。当我将我的显卡设置为我的latop中的radeon时，它可以毫无问题地工作，但是当我因为某种原因将其设置为可切换时它仍然会崩溃，即使它应该选择我的radeon。我需要修复图形模式。很奇怪，但至少它不是我的计划。

Answer 2

无法从代码检查中得知。我没有注意到任何明显的错误。当然不应该有任何BSOD - 那部分是驱动程序错误。你在运行什么硬件/驱动程序？

驱动程序崩溃的一个常见原因是非法写入某些内存区域，通常是因为你在DC内存之外进行了blitting。我会仔细检查以验证您的区域是否超出范围，并且m_alphaBlackDC的大小与dc相同。

我也非常强烈建议在另一个不相关的GPU（不共享相同的硬件架构）上进行测试。

Directx 11 Bitblt替代品

2 个答案: