public void Transform_MemoryToFile()
{
var jpeg = File.ReadAllBytes(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "tu.jpg"));
var output = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, Path.GetRandomFileName());
if (JpegTools.Transform(jpeg, output, false, true))
{
var res = File.ReadAllBytes(output);
Assert.That(res.Length, Is.LessThan(jpeg.Length));
}
else
{
Assert.Fail();
}
Assert.IsTrue(IsJpegImage(output));
File.Delete(output);
}
public void Transform_MemoryToMemory()
{
var jpeg = File.ReadAllBytes(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "tu.jpg"));
if (JpegTools.Transform(jpeg, out byte[] res, copy: false, optimize: true))
private async Task <IRandomAccessStream> ResizeStreamAsync(IRandomAccessStream stream, Size size, PhotoOrientation orientation)
{
var rotation = 0;
switch (orientation)
{
case PhotoOrientation.Rotate180:
{
rotation = -180;
};
break;
case PhotoOrientation.Rotate270:
{
rotation = -270;
};
break;
case PhotoOrientation.Rotate90:
{
rotation = -90;
};
break;
}
using (var resizedStream = new InMemoryRandomAccessStream())
{
var buffer = new byte[stream.Size].AsBuffer();
stream.Seek(0);
await stream.ReadAsync(buffer, buffer.Length, InputStreamOptions.None);
var resizeConfiguration = new AutoResizeConfiguration(
(uint)(size.Width * size.Height * 4 * 2), size,
new Size(0, 0), AutoResizeMode.Automatic, 0.7, ColorSpace.Yuv420);
buffer = await JpegTools.AutoResizeAsync(buffer, resizeConfiguration);
await resizedStream.WriteAsync(buffer);
await resizedStream.FlushAsync();
if (rotation != 0)
{
resizedStream.Seek(0);
var filters = new List <IFilter>()
{
new RotationFilter(rotation)
};
using (var source = new RandomAccessStreamImageSource(resizedStream))
using (var effect = new FilterEffect(source)
{
Filters = filters
})
using (var renderer = new JpegRenderer(effect))
{
buffer = await renderer.RenderAsync();
using (var rotatedResizedStream = new InMemoryRandomAccessStream())
{
await rotatedResizedStream.WriteAsync(buffer);
await rotatedResizedStream.FlushAsync();
return(rotatedResizedStream.CloneStream());
}
}
}
else
{
return(resizedStream.CloneStream());
}
}
}
