//Filters
async void ApplyFilter(FilterType filterType)
{
if (currentFilterType == filterType)
{
return;
}
var filterImage = Element as FilterImage;
var handler = GetHandler(filterImage.OriginalSource);
using (UIImage originalImage = await handler.LoadImageAsync(filterImage.OriginalSource))
{
switch (filterType)
{
case FilterType.NoFilter:
filteredImage = UIImage.FromImage(originalImage.CGImage, originalImage.CurrentScale, originalImage.Orientation);
break;
case FilterType.BlackAndWhite:
var blackAndWhiteEffect = new CIPhotoEffectMono()
{
Image = new CoreImage.CIImage(originalImage)
};
filteredImage = ApplyEffect(blackAndWhiteEffect, originalImage);
break;
case FilterType.Hifi:
var hifiControls = new CIColorControls()
{
Image = new CoreImage.CIImage(originalImage),
Brightness = .5F, // Min: 0 Max: 2
Saturation = 1.2F, // Min: -1 Max: 1
Contrast = 2.5F // Min: 0 Max: 4
};
filteredImage = ApplyEffect(hifiControls, originalImage);
break;
case FilterType.Vintage:
var vintageEffect = new CIPhotoEffectChrome()
{
Image = new CoreImage.CIImage(originalImage)
};
filteredImage = ApplyEffect(vintageEffect, originalImage);
break;
case FilterType.Saturated:
var saturatedEffect = new GPUImageSaturationFilter();
saturatedEffect.Saturation = 2.5f;
var imageFiltered = saturatedEffect.CreateFilteredImage(originalImage);
filteredImage = imageFiltered;
break;
}
Control.Image = filteredImage;
currentFilterType = filterType;
}
}
/// <summary>
/// Exaggerates color of the image producing a vintage look.
/// </summary>
/// <returns>The altered inmage.</returns>
CIImage PhotoEffectChrome ()
{
var photo_effect_chrome = new CIPhotoEffectChrome ()
{
Image = flower
};
return photo_effect_chrome.OutputImage;
}
