[W8App] D2DERR_WRONG_FACTORY (0x88990012)

最近在學習W8App的Direct2D與DirectWrite時發生了一個例外的錯誤，當呼叫D2D的EndDraw來更新繪圖結果是產生了0x88990012 (D2DERR_WRONG_FACTORY)的例外錯誤。

這個錯誤發生的原因是我的DirectWrite Render物件預先儲存了D2D factory，而透過SurfaceImageSource來連結W8App與Direct2D時，D2DContext所使用的D2D factory似乎有自已獨立的產生方式。

目前的解決方式是透過GetFactory直接從D2DContext物件中取得D2DFactory，至於是否有更好的作法，就需要再研究。

   1: IFACEMETHODIMP CustomTextRenderer::DrawGlyphRun(

   2:     _In_opt_ void* clientDrawingContext,

   3:     FLOAT baselineOriginX,

   4:     FLOAT baselineOriginY,

   5:     DWRITE_MEASURING_MODE measuringMode,

   6:     _In_ DWRITE_GLYPH_RUN const* glyphRun,

   7:     _In_ DWRITE_GLYPH_RUN_DESCRIPTION const* glyphRunDescription,

   8:     IUnknown* clientDrawingEffect

   9:     )

  10: {

  11:     HRESULT hr = S_OK;

  12:  

  13:     Microsoft::WRL::ComPtr<ID2D1Factory> d2dFactory;

  14:     m_d2dContext->GetFactory(&d2dFactory);

  15:  

  16:     // Create the path geometry.

  17:     Microsoft::WRL::ComPtr<ID2D1PathGeometry> pathGeometry;

  18:     hr = d2dFactory->CreatePathGeometry(&pathGeometry);

  19:  

  20:     // Write to the path geometry using the geometry sink.

  21:  

  22:     Microsoft::WRL::ComPtr<ID2D1GeometrySink> sink;

  23:     if (SUCCEEDED(hr))

  24:     {

  25:         hr = pathGeometry->Open(&sink);

  26:     }

  27:  

  28:     // Get the glyph run outline geometries back from DirectWrite and place them within the

  29:     // geometry sink.

  30:     if (SUCCEEDED(hr))

  31:     {

  32:         hr = glyphRun->fontFace->GetGlyphRunOutline(

  33:             glyphRun->fontEmSize,

  34:             glyphRun->glyphIndices,

  35:             glyphRun->glyphAdvances,

  36:             glyphRun->glyphOffsets,

  37:             glyphRun->glyphCount,

  38:             glyphRun->isSideways,

  39:             glyphRun->bidiLevel %2,

  40:             sink.Get()

  41:             );

  42:     }

  43:  

  44:     // Close the geometry sink

  45:     if (SUCCEEDED(hr))

  46:     {

  47:         hr = sink.Get()->Close();

  48:     }

  49:  

  50:     // Initialize a matrix to translate the origin of the glyph run.

  51:     D2D1::Matrix3x2F const matrix = D2D1::Matrix3x2F(

  52:         1.0f, 0.0f,

  53:         0.0f, 1.0f,

  54:         baselineOriginX, baselineOriginY

  55:         );

  56:  

  57:     // Create the transformed geometry

  58:     Microsoft::WRL::ComPtr<ID2D1TransformedGeometry> transformedGeometry;

  59:     if (SUCCEEDED(hr))

  60:     {

  61:         hr = d2dFactory->CreateTransformedGeometry(

  62:             pathGeometry.Get(),

  63:             &matrix,

  64:             &transformedGeometry

  65:             );

  66:     }

  67:  

  68:     // Draw the outline of the glyph run

  69:     if(SUCCEEDED(hr))

  70:     {

  71:         m_d2dContext->DrawGeometry(transformedGeometry.Get(),m_brushOutline.Get());

  72:         m_d2dContext->FillGeometry(transformedGeometry.Get(),m_brushFill.Get());

  73:     }

  74:  

  75:     return hr;

  76: }

13-14 透過目前的D2DContext來取得D2DFactory