|
private GetPixelDataAsync ( ) : IAsyncOperation |
||
| Результат | IAsyncOperation |
|
public static async Task <byte[]> ImageToByteArray(Uri uri)
{
Windows.Storage.Streams.IRandomAccessStream random = await Windows.Storage.Streams.RandomAccessStreamReference.CreateFromUri(uri).OpenReadAsync();
Windows.Graphics.Imaging.BitmapDecoder decoder = await Windows.Graphics.Imaging.BitmapDecoder.CreateAsync(random);
Windows.Graphics.Imaging.PixelDataProvider pixelData = await decoder.GetPixelDataAsync();
return(pixelData.DetachPixelData());
}
private async static Task<byte[]> GetPixelData(BitmapDecoder decoder, uint startPointX, uint startPointY,
uint width, uint height, uint scaledWidth, uint scaledHeight)
{
BitmapTransform transform = new BitmapTransform();
BitmapBounds bounds = new BitmapBounds();
bounds.X = startPointX;
bounds.Y = startPointY;
bounds.Height = height;
bounds.Width = width;
transform.Bounds = bounds;
transform.ScaledWidth = scaledWidth;
transform.ScaledHeight = scaledHeight;
// Get the cropped pixels within the bounds of transform.
PixelDataProvider pix = await decoder.GetPixelDataAsync(
BitmapPixelFormat.Bgra8,
BitmapAlphaMode.Straight,
transform,
ExifOrientationMode.IgnoreExifOrientation,
ColorManagementMode.ColorManageToSRgb);
byte[] pixels = pix.DetachPixelData();
return pixels;
}
protected async Task<byte[]> getPixelData(BitmapDecoder decoder)
{
PixelDataProvider pixelProvider = await decoder.GetPixelDataAsync(
BitmapPixelFormat.Rgba8,
BitmapAlphaMode.Straight,
new BitmapTransform(),
ExifOrientationMode.RespectExifOrientation,
ColorManagementMode.ColorManageToSRgb
);
return pixelProvider.DetachPixelData();
}