我有一个Xamarin表格视图,根据触摸事件我可以改变图像
<StackLayout >
<skia:SKCanvasView x:Name="canvasView"
PaintSurface="ImageCanvas_PaintSurface"
EnableTouchEvents="True"
HorizontalOptions="FillAndExpand" VerticalOptions="FillAndExpand"
IgnorePixelScaling="True"// not sure if i need this??
Touch="OnTouch" />
<Button Text="Generate Image" Clicked="CreateButton_Clicked"/>
</StackLayout>
我需要根据表面上绘制的内容生成1060 x 550的图像
void ImageCanvas_PaintSurface(object sender, SKPaintSurfaceEventArgs args)
{
var surface = args.Surface;
var canvas = surface.Canvas;
/// paint bitmaps/text on canvas etc
// Save the image to local storage
ViewModel.SaveImage(surface.Snapshot());
}
到目前为止,我可以看到如果我可以将从Surface.Snapshot()返回的SKImage转换为SKBitmap,我可以使用Resize()函数。我该怎么做?
谢谢!
答案 0 :(得分:1)
您可以拍摄并将其保存为设备文件夹中的SKImage,然后将其作为流文件并调整大小并重新保存
SKImage snapI = e.Surface.Snapshot();
SKData pngImage = snapI.Encode();
var x= Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Personal), "FolderName");
var fullpath = x+"PicName.png";
File.WriteAllBytes(fullpath, pngImage.ToArray());
SKBitmap bitmap = SKBitmap.Decode(fullpath);
var dstInfo = new SKImageInfo(1060, 550);
bitmap.Resize(dstInfo, SKBitmapResizeMethod.Hamming);
您可以根据需要更好地改进和优化代码。