使用WPF WriteableBitmap.BackBuffer绘制线条 [英] Drawing line using WPF WriteableBitmap.BackBuffer

问题描述

您是否知道有任何库提供使用WPF WriteableBitmap和理想的BackBuffer绘制简单形状(线和其他形状)的方法? 我知道有一个Silverlight的WriteableBitmapEx项目，但是有WPF等效项吗?

Do you know any library that provides methods to draw simple shapes (lines and optionally other shapes) using WPF WriteableBitmap and ideally BackBuffer? I know that there is a WriteableBitmapEx project for silverlight but is there WPF equivalent?

推荐答案

我想这是我的问题的答案:)

I guess here is the answer to my question :)

_plotBitmap.Lock();

var b = new Bitmap(_plotBitmap.PixelWidth,
                   _plotBitmap.PixelHeight,
                   _plotBitmap.BackBufferStride,
                   System.Drawing.Imaging.PixelFormat.Format24bppRgb, 
                   _plotBitmap.BackBuffer);

using(var bitmapGraphics = System.Drawing.Graphics.FromImage(b))
{
    bitmapGraphics.SmoothingMode = SmoothingMode.HighSpeed;
    bitmapGraphics.InterpolationMode = InterpolationMode.NearestNeighbor;
    bitmapGraphics.CompositingMode = CompositingMode.SourceCopy;
    bitmapGraphics.CompositingQuality = CompositingQuality.HighSpeed;
    bitmapGraphics.DrawLine(Pens.Gold,2,2,222,222);
}

_plotBitmap.AddDirtyRect(new Int32Rect(0,0,_plotBitmap.PixelWidth,_plotBitmap.PixelHeight));
_plotBitmap.Unlock();

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