ApplyFilter

ApplyFilteriOS.cs

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;

			}



}