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dotnet-framework-api
- C1.Win.Bitmap.4.8 Assembly
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C1.Win.C1DX.4.8 Assembly
- C1.Util.DX
- C1.Util.DX.Animation
- C1.Util.DX.DXGI
- C1.Util.DX.Direct2D
- C1.Util.DX.Direct2D.Effects
- C1.Util.DX.Direct3D11
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C1.Util.DX.DirectWrite
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Classes
- BitmapRenderTarget
- BitmapRenderTarget1
- ColorGlyphRun
- ColorGlyphRunEnumerator
- DWrite
- EllipsisTrimming
- Factory
- Factory1
- Factory2
- Font
- Font1
- FontCollection
- FontCollectionLoaderShadow
- FontFace
- FontFace1
- FontFallback
- FontFallbackBuilder
- FontFamily
- FontFile
- FontFileEnumeratorShadow
- FontFileLoaderNative
- FontFileLoaderShadow
- FontFileStreamNative
- FontFileStreamShadow
- FontList
- GdiInterop
- GlyphRun
- GlyphRunAnalysis
- GlyphRunDescription
- InlineObjectNative
- InlineObjectShadow
- LocalFontFileLoader
- LocalizedStrings
- LogFont
- NumberSubstitution
- PixelSnappingShadow
- RenderingParams
- RenderingParams1
- RenderingParams2
- ResultCode
- TextAnalysisQuickSink1Shadow
- TextAnalysisQuickSinkShadow
- TextAnalysisQuickSource1Shadow
- TextAnalysisQuickSourceShadow
- TextAnalysisSink1Shadow
- TextAnalysisSinkShadow
- TextAnalysisSource1Shadow
- TextAnalysisSourceShadow
- TextAnalyzer
- TextAnalyzer1
- TextFormat
- TextLayout
- TextLayout1
- TextRenderer1Base
- TextRenderer1Shadow
- TextRendererBase
- TextRendererShadow
- Typography
- Structs
- Enums
- Interfaces
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Classes
- C1.Util.DX.Storage
- C1.Util.DX.WIC
C1.Util.DX.DirectWrite.TextRenderer1Base.DrawUnderline
DrawUnderline Method
DrawUnderline(object, float, float, ref Underline, IntPtr)
IDWriteTextLayout::Draw calls this function to instruct the client to draw an underline.
Declaration
public override HResult DrawUnderline(object clientDrawingContext, float baselineOriginX, float baselineOriginY, ref Underline underline, IntPtr clientDrawingEffectPtr)Parameters
| Type | Name | Description |
|---|---|---|
| object | clientDrawingContext | |
| float | baselineOriginX | |
| float | baselineOriginY | |
| Underline | underline | |
| IntPtr | clientDrawingEffectPtr |
Returns
| Type | Description |
|---|---|
| HResult |
Overrides
Implements
DrawUnderline(object, float, float, GlyphOrientationAngle, ref Underline, IntPtr)
IDWriteTextLayout::Draw calls this function to instruct the client to draw an underline.
Declaration
public virtual HResult DrawUnderline(object clientDrawingContext, float baselineOriginX, float baselineOriginY, GlyphOrientationAngle orientationAngle, ref Underline underline, IntPtr clientDrawingEffectPtr)Parameters
| Type | Name | Description |
|---|---|---|
| object | clientDrawingContext | The application-defined drawing context passed to IDWriteTextLayout::Draw. |
| float | baselineOriginX | The pixel location (X-coordinate) at the baseline origin of the run where underline applies. |
| float | baselineOriginY | The pixel location (Y-coordinate) at the baseline origin of the run where underline applies. |
| GlyphOrientationAngle | orientationAngle | Orientation of the underline. |
| Underline | underline | Pointer to a structure containing underline logical information. |
| IntPtr | clientDrawingEffectPtr | Application-defined effect to apply to the underline. Usually this argument represents effects such as the foreground brush filling the interior of a line. |
Returns
| Type | Description |
|---|---|
| HResult | If the method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code. |
Implements
Remarks
A single underline can be broken into multiple calls, depending on how the formatting changes attributes. If font sizes/styles change within an underline, the thickness and offset will be averaged weighted according to characters. To get an appropriate starting pixel position, add underline::offset to the baseline. Otherwise there will be no spacing between the text. The x coordinate will always be passed as the left side, regardless of text directionality. This simplifies drawing and reduces the problem of round-off that could potentially cause gaps or a double stamped alpha blend. To avoid alpha overlap, round the end points to the nearest device pixel.