void createLayout (TextLayout& layout, const AttributedString& text, IDWriteFactory& directWriteFactory, ID2D1Factory& direct2dFactory, IDWriteFontCollection& fontCollection) { // To add color to text, we need to create a D2D render target // Since we are not actually rendering to a D2D context we create a temporary GDI render target D2D1_RENDER_TARGET_PROPERTIES d2dRTProp = D2D1::RenderTargetProperties (D2D1_RENDER_TARGET_TYPE_SOFTWARE, D2D1::PixelFormat (DXGI_FORMAT_B8G8R8A8_UNORM, D2D1_ALPHA_MODE_IGNORE), 0, 0, D2D1_RENDER_TARGET_USAGE_GDI_COMPATIBLE, D2D1_FEATURE_LEVEL_DEFAULT); ComSmartPtr<ID2D1DCRenderTarget> renderTarget; HRESULT hr = direct2dFactory.CreateDCRenderTarget (&d2dRTProp, renderTarget.resetAndGetPointerAddress()); ComSmartPtr<IDWriteTextLayout> dwTextLayout; if (! setupLayout (text, layout.getWidth(), layout.getHeight(), *renderTarget, directWriteFactory, fontCollection, dwTextLayout)) return; UINT32 actualLineCount = 0; hr = dwTextLayout->GetLineMetrics (nullptr, 0, &actualLineCount); layout.ensureStorageAllocated (actualLineCount); { ComSmartPtr<CustomDirectWriteTextRenderer> textRenderer (new CustomDirectWriteTextRenderer (fontCollection, text)); hr = dwTextLayout->Draw (&layout, textRenderer, 0, 0); } HeapBlock<DWRITE_LINE_METRICS> dwLineMetrics (actualLineCount); hr = dwTextLayout->GetLineMetrics (dwLineMetrics, actualLineCount, &actualLineCount); int lastLocation = 0; const int numLines = jmin ((int) actualLineCount, layout.getNumLines()); float yAdjustment = 0; const float extraLineSpacing = text.getLineSpacing(); for (int i = 0; i < numLines; ++i) { TextLayout::Line& line = layout.getLine (i); line.stringRange = Range<int> (lastLocation, (int) lastLocation + dwLineMetrics[i].length); line.lineOrigin.y += yAdjustment; yAdjustment += extraLineSpacing; lastLocation += dwLineMetrics[i].length; } }
void createLayout (TextLayout& layout, const AttributedString& text, IDWriteFactory& directWriteFactory, IDWriteFontCollection& fontCollection, ID2D1DCRenderTarget& renderTarget) { ComSmartPtr<IDWriteTextLayout> dwTextLayout; if (! setupLayout (text, layout.getWidth(), layout.getHeight(), renderTarget, directWriteFactory, fontCollection, dwTextLayout)) return; UINT32 actualLineCount = 0; HRESULT hr = dwTextLayout->GetLineMetrics (nullptr, 0, &actualLineCount); layout.ensureStorageAllocated (actualLineCount); { ComSmartPtr<CustomDirectWriteTextRenderer> textRenderer (new CustomDirectWriteTextRenderer (fontCollection, text)); hr = dwTextLayout->Draw (&layout, textRenderer, 0, 0); } HeapBlock<DWRITE_LINE_METRICS> dwLineMetrics (actualLineCount); hr = dwTextLayout->GetLineMetrics (dwLineMetrics, actualLineCount, &actualLineCount); int lastLocation = 0; const int numLines = jmin ((int) actualLineCount, layout.getNumLines()); float yAdjustment = 0; const float extraLineSpacing = text.getLineSpacing(); for (int i = 0; i < numLines; ++i) { TextLayout::Line& line = layout.getLine (i); line.stringRange = Range<int> (lastLocation, (int) lastLocation + dwLineMetrics[i].length); line.lineOrigin.y += yAdjustment; yAdjustment += extraLineSpacing; lastLocation += dwLineMetrics[i].length; } }
void createLayout (TextLayout& layout, const AttributedString& text, IDWriteFactory* const directWriteFactory, ID2D1Factory* const direct2dFactory, IDWriteFontCollection* const fontCollection) { // To add color to text, we need to create a D2D render target // Since we are not actually rendering to a D2D context we create a temporary GDI render target D2D1_RENDER_TARGET_PROPERTIES d2dRTProp = D2D1::RenderTargetProperties (D2D1_RENDER_TARGET_TYPE_SOFTWARE, D2D1::PixelFormat (DXGI_FORMAT_B8G8R8A8_UNORM, D2D1_ALPHA_MODE_IGNORE), 0, 0, D2D1_RENDER_TARGET_USAGE_GDI_COMPATIBLE, D2D1_FEATURE_LEVEL_DEFAULT); ComSmartPtr<ID2D1DCRenderTarget> renderTarget; HRESULT hr = direct2dFactory->CreateDCRenderTarget (&d2dRTProp, renderTarget.resetAndGetPointerAddress()); Font defaultFont; BOOL fontFound = false; uint32 fontIndex; fontCollection->FindFamilyName (defaultFont.getTypefaceName().toWideCharPointer(), &fontIndex, &fontFound); if (! fontFound) fontIndex = 0; ComSmartPtr<IDWriteFontFamily> dwFontFamily; hr = fontCollection->GetFontFamily (fontIndex, dwFontFamily.resetAndGetPointerAddress()); ComSmartPtr<IDWriteFont> dwFont; hr = dwFontFamily->GetFirstMatchingFont (DWRITE_FONT_WEIGHT_NORMAL, DWRITE_FONT_STRETCH_NORMAL, DWRITE_FONT_STYLE_NORMAL, dwFont.resetAndGetPointerAddress()); const float defaultFontHeightToEmSizeFactor = getFontHeightToEmSizeFactor (dwFont); jassert (directWriteFactory != nullptr); ComSmartPtr<IDWriteTextFormat> dwTextFormat; hr = directWriteFactory->CreateTextFormat (defaultFont.getTypefaceName().toWideCharPointer(), fontCollection, DWRITE_FONT_WEIGHT_REGULAR, DWRITE_FONT_STYLE_NORMAL, DWRITE_FONT_STRETCH_NORMAL, defaultFont.getHeight() * defaultFontHeightToEmSizeFactor, L"en-us", dwTextFormat.resetAndGetPointerAddress()); setTextFormatProperties (text, dwTextFormat); const int textLen = text.getText().length(); ComSmartPtr<IDWriteTextLayout> dwTextLayout; hr = directWriteFactory->CreateTextLayout (text.getText().toWideCharPointer(), textLen, dwTextFormat, layout.getWidth(), 1.0e7f, dwTextLayout.resetAndGetPointerAddress()); const int numAttributes = text.getNumAttributes(); for (int i = 0; i < numAttributes; ++i) addAttributedRange (*text.getAttribute (i), dwTextLayout, textLen, renderTarget, fontCollection); UINT32 actualLineCount = 0; hr = dwTextLayout->GetLineMetrics (nullptr, 0, &actualLineCount); layout.ensureStorageAllocated (actualLineCount); { ComSmartPtr<CustomDirectWriteTextRenderer> textRenderer (new CustomDirectWriteTextRenderer (fontCollection)); hr = dwTextLayout->Draw (&layout, textRenderer, 0, 0); } HeapBlock <DWRITE_LINE_METRICS> dwLineMetrics (actualLineCount); hr = dwTextLayout->GetLineMetrics (dwLineMetrics, actualLineCount, &actualLineCount); int lastLocation = 0; const int numLines = jmin ((int) actualLineCount, layout.getNumLines()); for (int i = 0; i < numLines; ++i) { lastLocation = dwLineMetrics[i].length; layout.getLine(i).stringRange = Range<int> (lastLocation, (int) lastLocation + dwLineMetrics[i].length); } }