问wpf 2d高性能显卡

EN

public class MyImage : Image {
    // the pixel format for the image.  This one is blue-green-red-alpha 32bit format
    private static PixelFormat PIXEL_FORMAT = PixelFormats.Bgra32;
    // the bitmap used as a pixel source for the image
    WriteableBitmap bitmap;
    // the clipping bounds of the bitmap
    Int32Rect bitmapRect;
    // the pixel array.  unsigned ints are 32 bits
    uint[] pixels;
    // the width of the bitmap.  sort of.
    int stride;

public MyImage(int width, int height) {
    // set the image width
    this.Width = width;
    // set the image height
    this.Height = height;
    // define the clipping bounds
    bitmapRect = new Int32Rect(0, 0, width, height);
    // define the WriteableBitmap
    bitmap = new WriteableBitmap(width, height, 96, 96, PIXEL_FORMAT, null);
    // define the stride
    stride = (width * PIXEL_FORMAT.BitsPerPixel + 7) / 8;
    // allocate our pixel array
    pixels = new uint[width * height];
    // set the image source to be the bitmap
    this.Source = bitmap;
}