我怎样才能把两张图片合并成一张呢?

Question

我有一个不透明度约为70%的蒙版图像，我有另一个从服务器下载的图像。我如何将它们重新绘制为单个图像，使下载的图像位于蒙版图像的正下方?我不想使用画布，因为我将使用合并图像作为全景背景，而画布不起作用。

像这样:

using (Graphics grfx = Graphics.FromImage(image))
{
    grfx.DrawImage(newImage, x, y)
}

我试过了，但是没有运气:

        BitmapImage bmp = new BitmapImage();
        BitmapImage bi = new BitmapImage();
        ImageBrush imageBrush = new ImageBrush();
        ImageBrush imageBrush2 = new ImageBrush();
        bi.UriSource = new Uri("Images/MainPage/mask_bg.png", UriKind.Relative);
        bmp.UriSource = new Uri("Images/MainPage/covertart_bg.jpg", UriKind.Relative);
        TranslateTransform translate = new TranslateTransform
        {
            X = 0,
            Y = 0
        };
        imageBrush.ImageSource = bmp;
        ImageCanvas canvas = new ImageCanvas();
        canvas.Background = imageBrush;
        WriteableBitmap w_bitmap = new WriteableBitmap(1065, 800);
        w_bitmap.Render(canvas, translate);
        w_bitmap.Invalidate();
        imageBrush2.ImageSource = w_bitmap;
        mainPanorama.Background = imageBrush2;

Answer 1

使用WriteableBitmapEx项目中的Blit方法