ReadWriteBitmapDataExtensionsDrawText(IReadWriteBitmapData, Color32, FormattedText, PointF, DrawingOptions) Method
Draws a text represented by a
FormattedText instance, filling the characters with a solid brush of the specified
color.
Namespace: KGySoft.Drawing.WpfAssembly: KGySoft.Drawing.Wpf (in KGySoft.Drawing.Wpf.dll) Version: 10.0.0-rc.1
public static void DrawText(
this IReadWriteBitmapData bitmapData,
Color32 color,
FormattedText text,
PointF location,
DrawingOptions? drawingOptions = null
)
<ExtensionAttribute>
Public Shared Sub DrawText (
bitmapData As IReadWriteBitmapData,
color As Color32,
text As FormattedText,
location As PointF,
Optional drawingOptions As DrawingOptions = Nothing
)
public:
[ExtensionAttribute]
static void DrawText(
IReadWriteBitmapData^ bitmapData,
Color32 color,
FormattedText^ text,
PointF location,
DrawingOptions^ drawingOptions = nullptr
)
[<ExtensionAttribute>]
static member DrawText :
bitmapData : IReadWriteBitmapData *
color : Color32 *
text : FormattedText *
location : PointF *
?drawingOptions : DrawingOptions
(* Defaults:
let _drawingOptions = defaultArg drawingOptions null
*)
-> unit
- bitmapData IReadWriteBitmapData
- The IReadWriteBitmapData instance to draw on.
- color Color32
- The color of the solid brush to draw the text with.
- text FormattedText
- A FormattedText instance representing the text to draw.
- location PointF
- The location of the upper-left corner of the text's bounding rectangle.
- drawingOptions DrawingOptions (Optional)
- A DrawingOptions instance that specifies the drawing options to use.
If , then the default options are used. This parameter is optional.
Default value: .
In Visual Basic and C#, you can call this method as an instance method on any object of type
IReadWriteBitmapData. When you use instance method syntax to call this method, omit the first parameter. For more information, see
Extension Methods (Visual Basic) or
Extension Methods (C# Programming Guide).
This method fills the characters of the text. To draw the outline of a text, you can use the DrawTextOutline methods.
To draw a text with both filled and outlined characters, instead of calling
DrawText
and
DrawTextOutline consecutively, you can achieve a better performance by creating a
Path once, and then calling
the
FillPath and
DrawPath methods.
You can convert the specified
text to a
Path by obtaining a
Geometry instance by calling
the
FormattedText.BuildGeometry method, and then using the
ToPath extension method.
If you draw the text without antialiasing, it is recommended to set the
FastThinLines to
in
drawingOptions
so the outline correctly aligns to the filled area.
The possibly specified foreground brushes in text are ignored. You still must specify a non- brush when creating the FormattedText
instance to be able to obtain a non-empty geometry for its text.
When AntiAliasing is set in drawingOptions and you use non-monochromatic colors, it is recommended to specify Linear
color space when you obtain the IReadWriteBitmapData instance, especially for small fonts; otherwise, the quality of the drawn text can be poor if alpha colors are blended in the sRGB color space.
See more details at the Examples section of the WorkingColorSpace enumeration.
This method adjusts the degree of parallelization automatically, blocks the caller, and does not support cancellation or reporting progress. You can use the overloads that have
a
ParallelConfig parameter to configure these, while still executing the method synchronously. Alternatively, use
the
BeginDrawText or
DrawTextAsync
(in .NET Framework 4.0 and above) methods to perform the operation asynchronously.
