我有2个位图(前景和背景),我需要将它们叠加在一起以形成一个新的位图并将其用作按钮的ImageBrush。 代码看起来像这样(Windows 8.1商店应用程序):
WriteableBitmap foregroundBitmap = GetForegroundBitmap();
WriteableBitmap backgroundBitmap = GetBackgroundBitmap();
ImageBrush imageBrush = new ImageBrush();
imageBrush.ImageSource = Overlay(foregroundBitmap, backgroundBitmap);
Button button = new Button();
button.Background = imageBrush;
如何实现上面的Overlay(...)方法?
我试过了:
backgroundBitmap.Blit(
new Rect(0, 0, backgroundBitmap.PixelWidth, backgroundBitmap.PixelHeight),
foregroundBitmap,
new Rect(0, 0, foregroundBitmap.PixelWidth, foregroundBitmap.PixelHeight),
WriteableBitmapExtensions.BlendMode.None);
但它不起作用(使用BlendedMode None或Additive)。
感谢。
答案 0 :(得分:0)
试试这个
<Window.Resources>
<BitmapImage x:Key="image1" UriSource="DefaultImage.png"></BitmapImage>
<BitmapImage x:Key="image2" UriSource="ImageRoation.png"></BitmapImage>
</Window.Resources>
<Button Height="200" Width="200">
<Grid Height="200" Width="200">
<Grid.Background>
<ImageBrush ImageSource="{StaticResource image1}" Stretch="Fill" ></ImageBrush>
</Grid.Background>
<Grid Margin="5" Width="50" Height="50">
<Grid.Background>
<ImageBrush ImageSource="{StaticResource image2}" Stretch="Fill"></ImageBrush>
</Grid.Background>
</Grid>
</Grid>
</Button>