public async Task <byte[]> RenderAsync(RenderEncodingOptions encodingFormat = RenderEncodingOptions.Png)
{
var rtb = new RenderTargetBitmap();
await rtb.RenderAsync(Window.Current.Content);
var pixelBuffer = await rtb.GetPixelsAsync();
var pixels = pixelBuffer.ToArray();
var displayInformation = DisplayInformation.GetForCurrentView();
var fileExtension = encodingFormat == RenderEncodingOptions.Png ? "png" : "jpg";
var file = await ApplicationData.Current.LocalFolder.CreateFileAsync($"temp.{fileExtension}", CreationCollisionOption.ReplaceExisting);
using (var stream = await file.OpenAsync(FileAccessMode.ReadWrite))
{
var encoder = await BitmapEncoder.CreateAsync(
encodingFormat == RenderEncodingOptions.Jpeg?BitmapEncoder.JpegEncoderId : BitmapEncoder.PngEncoderId,
stream);
encoder.SetPixelData(BitmapPixelFormat.Bgra8,
BitmapAlphaMode.Premultiplied,
(uint)rtb.PixelWidth,
(uint)rtb.PixelHeight,
displayInformation.RawDpiX,
displayInformation.RawDpiY,
pixels);
await encoder.FlushAsync();
}
var buffer = await FileIO.ReadBufferAsync(file);
return(buffer.ToArray());
}
public Task <byte[]> RenderAsync(RenderEncodingOptions encodingFormat = RenderEncodingOptions.Png)
{
return(Task.Run(() =>
{
var capture = UIScreen.MainScreen.Capture();
if (encodingFormat == RenderEncodingOptions.Jpeg)
{
using (var nsData = capture.AsJPEG())
{
var bytes = new byte[nsData.Length];
Marshal.Copy(nsData.Bytes, bytes, 0, Convert.ToInt32(nsData.Length));
return bytes;
}
}
else
{
using (var nsData = capture.AsPNG())
{
var bytes = new byte[nsData.Length];
Marshal.Copy(nsData.Bytes, bytes, 0, Convert.ToInt32(nsData.Length));
return bytes;
}
}
}));
}
public Task <byte[]> RenderAsync(int x, int y, int width, int height, RenderEncodingOptions encodingFormat = RenderEncodingOptions.Png)
{
return(Task.Run(() =>
{
var rootView = CrossCurrentActivity.Current.Activity.Window.DecorView.RootView;
// Generate the full screen bitmap
using (var bitmap = Bitmap.CreateBitmap(rootView.Width, rootView.Height, Bitmap.Config.Argb8888))
{
var canvas = new Canvas(bitmap);
rootView.Draw(canvas);
// Generate the cropped bitmap using the crop rect.
using (var croppedBitmap = Bitmap.CreateBitmap(bitmap, x, y, width, height))
{
var canvas2 = new Canvas(croppedBitmap);
rootView.Draw(canvas2);
using (var stream = new MemoryStream())
{
croppedBitmap.Compress(
encodingFormat == RenderEncodingOptions.Jpeg ? Bitmap.CompressFormat.Jpeg : Bitmap.CompressFormat.Png,
90,
stream);
return stream.ToArray();
}
}
}
}));
}
public Task <byte[]> RenderAsync(int x, int y, int width, int height, RenderEncodingOptions encodingFormat = RenderEncodingOptions.Png)
{
return(Task.Run(() =>
{
var capture = UIScreen.MainScreen.Capture();
// Option 1
//UIGraphics.BeginImageContext(new SizeF(width, height));
//UIGraphics.GetCurrentContext().ClipToRect(new RectangleF(0, 0, width, height));
//capture.Draw(new RectangleF(-x, -y, width, height));
//var modifiedImage = UIGraphics.GetImageFromCurrentImageContext();
//UIGraphics.EndImageContext();
// Option 2
// NOTE: Might need to use -x and -y
using (var cgImage = capture.CGImage.WithImageInRect(new RectangleF(x, y, width, height)))
{
var croppedImage = UIImage.FromImage(cgImage);
if (encodingFormat == RenderEncodingOptions.Jpeg)
{
using (var nsData = croppedImage.AsJPEG())
{
var bytes = new byte[nsData.Length];
Marshal.Copy(nsData.Bytes, bytes, 0, Convert.ToInt32(nsData.Length));
return bytes;
}
}
else
{
using (var nsData = croppedImage.AsPNG())
{
var bytes = new byte[nsData.Length];
Marshal.Copy(nsData.Bytes, bytes, 0, Convert.ToInt32(nsData.Length));
return bytes;
}
}
}
}));
}
public async Task <byte[]> RenderAsync(int x, int y, int width, int height, RenderEncodingOptions encodingFormat = RenderEncodingOptions.Png)
{
var rtb = new RenderTargetBitmap();
await rtb.RenderAsync(Window.Current.Content);
var pixelBuffer = await rtb.GetPixelsAsync();
var pixels = pixelBuffer.ToArray();
var displayInformation = DisplayInformation.GetForCurrentView();
var file = await ApplicationData.Current.LocalFolder.CreateFileAsync("temp" + ".png", CreationCollisionOption.ReplaceExisting);
using (var stream = await file.OpenAsync(FileAccessMode.ReadWrite))
{
var encoder = await BitmapEncoder.CreateAsync(
encodingFormat == RenderEncodingOptions.Jpeg?BitmapEncoder.JpegEncoderId : BitmapEncoder.PngEncoderId,
stream);
encoder.SetPixelData(BitmapPixelFormat.Bgra8,
BitmapAlphaMode.Premultiplied,
(uint)rtb.PixelWidth,
(uint)rtb.PixelHeight,
displayInformation.RawDpiX,
displayInformation.RawDpiY,
pixels);
// This does the cropping
encoder.BitmapTransform.Bounds = new BitmapBounds
{
X = (uint)x,
Y = (uint)y,
Height = (uint)height,
Width = (uint)width
};
await encoder.FlushAsync();
}
var buffer = await FileIO.ReadBufferAsync(file);
return(buffer.ToArray());
}
public Task <byte[]> RenderRelativeAsync(int xProportion, int yProportion, int widthProportion, int heightProportion, RenderEncodingOptions encodingFormat = RenderEncodingOptions.Png)
{
return(Task.Run(() =>
{
var capture = UIScreen.MainScreen.Capture();
var xTrue = capture.CGImage.Width * xProportion / 100;
var yTrue = capture.CGImage.Height * yProportion / 100;
var widthTrue = capture.CGImage.Width * widthProportion / 100;
var heightTrue = capture.CGImage.Height * heightProportion / 100;
using (var cgImage = capture.CGImage.WithImageInRect(new RectangleF(xTrue, yTrue, widthTrue, heightTrue)))
{
var croppedImage = UIImage.FromImage(cgImage);
if (encodingFormat == RenderEncodingOptions.Jpeg)
{
using (var nsData = croppedImage.AsJPEG())
{
var bytes = new byte[nsData.Length];
Marshal.Copy(nsData.Bytes, bytes, 0, Convert.ToInt32(nsData.Length));
return bytes;
}
}
else
{
using (var nsData = croppedImage.AsPNG())
{
var bytes = new byte[nsData.Length];
Marshal.Copy(nsData.Bytes, bytes, 0, Convert.ToInt32(nsData.Length));
return bytes;
}
}
}
}));
}
