public CanvasRenderTarget applyHueRotationEffects(CanvasBitmap workingBitmap)
{
//CanvasBitmap workingBitmap = SelectWorkingBitmap(useOriginalBitmap);
if (workingBitmap != null)
{
int ww = (int)workingBitmap.SizeInPixels.Width;
int hh = (int)workingBitmap.SizeInPixels.Height;
TemperatureAndTintEffect temperatureAndTintEffect = new TemperatureAndTintEffect();
temperatureAndTintEffect.Source = workingBitmap;
temperatureAndTintEffect.Temperature = (float)hueTemperature;
temperatureAndTintEffect.Tint = (float)hueTint;
HueRotationEffect hueRotationEffect = new HueRotationEffect();
hueRotationEffect.Angle = (float)hueRotationAngle;
hueRotationEffect.Source = temperatureAndTintEffect;
PosterizeEffect posterizeEffect = null;
EdgeDetectionEffect edgeDetectionEffect = null;
if (hueDoPosterize)
{
posterizeEffect = new PosterizeEffect();
posterizeEffect.Source = hueRotationEffect;
posterizeEffect.RedValueCount = huePosterizeRedCount;
posterizeEffect.BlueValueCount = huePosterizeBlueCount;
posterizeEffect.GreenValueCount = huePosterizeGreenCount;
edgeDetectionEffect = new EdgeDetectionEffect();
edgeDetectionEffect.Source = posterizeEffect;
edgeDetectionEffect.Amount = (float)0.9;
edgeDetectionEffect.BlurAmount = 1;
edgeDetectionEffect.OverlayEdges = true;
}
//if (canvasRenderTarget != null)
// canvasRenderTarget.Dispose();
CanvasRenderTarget canvasRenderTarget = new CanvasRenderTarget(CanvasDevice.GetSharedDevice(), ww, hh, canvasBitmap.Dpi);
using (var session = canvasRenderTarget.CreateDrawingSession())
{
if (hueDoPosterize)
{
//session.DrawImage(posterizeEffect);
session.DrawImage(edgeDetectionEffect);
}
else
{
session.DrawImage(hueRotationEffect);
}
}
return(canvasRenderTarget);
}
return(null);
}
async Task <Uri> Posterize()
{
using (var source = new StorageFileImageSource(imageStorageFile))
{
var inf = await source.GetInfoAsync();
using (var sharpnessEffect = new PosterizeEffect(source)
{
ColorComponentValueCount = 10
})
{
LastEffect = sharpnessEffect;
return(await SaveToImage());
}
}
}
private ICanvasImage CreatePosterize()
{
textLabel = requiresWin10;
var posterizeEffect = new PosterizeEffect
{
Source = bitmapTiger
};
// Animation changes the number of distinct color levels.
animationFunction = elapsedTime =>
{
posterizeEffect.RedValueCount = 2 + (int)(Math.Pow(0.5 + Math.Sin(elapsedTime) * 0.5, 4) * 10);
posterizeEffect.GreenValueCount = 2 + (int)(Math.Pow(0.5 + Math.Sin(elapsedTime / 1.3) * 0.5, 4) * 10);
posterizeEffect.BlueValueCount = 2 + (int)(Math.Pow(0.5 + Math.Sin(elapsedTime / 1.7) * 0.5, 4) * 10);
};
return(posterizeEffect);
}
