Renderer.Draw 方法 (Bitmap, Strokes)

项目
10/28/2008

在指定的 Bitmap 上绘制 Strokes 集合。

命名空间： Microsoft.Ink
程序集： Microsoft.Ink（在 Microsoft.Ink.dll 中）

语法

声明
Public Sub Draw ( _
    destinationBitmap As Bitmap, _
    strokes As Strokes _
)
用法
Dim instance As Renderer
Dim destinationBitmap As Bitmap
Dim strokes As Strokes

instance.Draw(destinationBitmap, strokes)

public void Draw(
    Bitmap destinationBitmap,
    Strokes strokes
)

public:
void Draw(
    Bitmap^ destinationBitmap, 
    Strokes^ strokes
)

public void Draw(
    Bitmap destinationBitmap,
    Strokes strokes
)

public function Draw(
    destinationBitmap : Bitmap, 
    strokes : Strokes
)

参数

destinationBitmap
类型：System.Drawing.Bitmap
要在其上进行绘制的指定 Bitmap。

strokes
类型：Microsoft.Ink.Strokes
要绘制的 Strokes 集合。

示例

在此示例中，将在已从文件加载的位图图像上绘制与 InkOverlay 对象关联的 Ink 对象中的整个 Strokes 集合。

调用 Draw 方法不会显示图像和笔画。该方法会在准备显示时将笔画呈现数据与位图图像数据合并。通过调用与 Panel 对象关联的 Graphics 对象的 DrawImage 方法，可以使位图图像（现在用笔画呈现数据修改过）可见。

' get the Bitmap object loaded from a file
' scale the image to match the panel size
Dim bgImage As Bitmap = New Bitmap(New Bitmap(imageFileName), Me.panelForDraw.Size)
' place (draw) the stroke collection on the bitmap
' Access to the Ink.Strokes property returns a copy of the Strokes object.
' This copy must be implicitly (via using statement) or explicitly
' disposed of in order to avoid a memory leak.
Using allStrokes As Strokes = mInkOverlay.Ink.Strokes
    mInkOverlay.Renderer.Draw(bgImage, allStrokes)
End Using
' now display the bitmap (with the strokes) on the panel
Using g As Graphics = Me.panelForDraw.CreateGraphics()
    g.DrawImage(bgImage, 0, 0)
End Using
bgImage.Dispose()

// get the Bitmap object loaded from a file
// scale the image to match the panel size
Bitmap bgImage = new Bitmap(new Bitmap(imageFileName), this.panelForDraw.Size);

// place (draw) the stroke collection on the bitmap
// Access to the Ink.Strokes property returns a copy of the Strokes object.
// This copy must be implicitly (via using statement) or explicitly
// disposed of in order to avoid a memory leak.
using (Strokes allStrokes = mInkOverlay.Ink.Strokes)
{
    mInkOverlay.Renderer.Draw(bgImage, allStrokes);
}
// now display the bitmap (with the strokes) on the panel
using (Graphics g = this.panelForDraw.CreateGraphics())
{
    g.DrawImage(bgImage,0,0);
}

bgImage.Dispose();