我有一个带有一些矢量图形的DrawingBrush。我想将它转换为BitmapSource作为将其转换为Bitmap的中间步骤。最好的方法是什么?
答案 0 :(得分:9)
public static BitmapSource BitmapSourceFromBrush(Brush drawingBrush, int size = 32, int dpi = 96)
{
// RenderTargetBitmap = builds a bitmap rendering of a visual
var pixelFormat = PixelFormats.Pbgra32;
RenderTargetBitmap rtb = new RenderTargetBitmap(size, size, dpi, dpi, pixelFormat);
// Drawing visual allows us to compose graphic drawing parts into a visual to render
var drawingVisual = new DrawingVisual();
using (DrawingContext context = drawingVisual.RenderOpen())
{
// Declaring drawing a rectangle using the input brush to fill up the visual
context.DrawRectangle(drawingBrush, null, new Rect(0, 0, size, size));
}
// Actually rendering the bitmap
rtb.Render(drawingVisual);
return rtb;
}