public static NSImage Tint(this NSImage image, NSColor tint)
{
var colorGenerator = new CIConstantColorGenerator
{
Color = CIColor.FromCGColor(tint.CGColor)
};
var colorFilter = new CIColorControls
{
Image = (CIImage)colorGenerator.ValueForKey(CIFilterOutputKey.Image),
Saturation = 3f,
Brightness = 0.35f,
Contrast = 1f
};
var monochromeFilter = new CIColorMonochrome
{
Image = CIImage.FromCGImage(image.CGImage),
Color = CIColor.FromRgb(0.75f, 0.75f, 0.75f),
Intensity = 1f
};
var compositingFilter = new CIMultiplyCompositing
{
Image = (CIImage)colorFilter.ValueForKey(CIFilterOutputKey.Image),
BackgroundImage = (CIImage)monochromeFilter.ValueForKey(CIFilterOutputKey.Image)
};
var outputImage = (CIImage)compositingFilter.ValueForKey(CIFilterOutputKey.Image);
var extent = outputImage.Extent;
var newsize = Size.Truncate(extent.Size.ToEto());
if (newsize.IsEmpty)
{
return(image);
}
var tintedImage = new NSImage(newsize.ToNS());
tintedImage.LockFocus();
try
{
var graphics = NSGraphicsContext.CurrentContext.GraphicsPort;
var ciContext = CIContext.FromContext(graphics, new CIContextOptions {
UseSoftwareRenderer = true
});
ciContext.DrawImage(outputImage, extent, extent);
}
finally
{
tintedImage.UnlockFocus();
}
var newrep = tintedImage.Representations()[0];
newrep.Size = image.Size;
tintedImage.Size = image.Size;
return(tintedImage);
}
public CIImage ColorMonochrome()
{
var inputColor = new CIColor(new CGColor(100F, 0F, 100F)); // Make it Purple R + B = Purple
var monoChrome = new CIColorMonochrome()
{
Image = flower,
Color = inputColor,
Intensity = 1F, // Default 1
};
return(monoChrome.OutputImage);
}
public IEditableImage ToMonochrome()
{
var mono = new CIColorMonochrome {
Color = CIColor.FromRgb(1, 1, 1),
Intensity = 1.0f,
Image = CIImage.FromCGImage(_image.CGImage)
};
CIImage output = mono.OutputImage;
var context = CIContext.FromOptions(null);
var renderedImage = context.CreateCGImage(output, output.Extent);
var monoImage = UIImage.FromImage(renderedImage, _image.CurrentScale, _image.Orientation);
_image.Dispose();
_image = monoImage;
monoImage = null;
renderedImage.Dispose();
renderedImage = null;
return(this);
}
public CIImage ColorMonochrome ()
{
var inputColor = new CIColor (new CGColor (100F, 0F, 100F)); // Make it Purple R + B = Purple
var monoChrome = new CIColorMonochrome ()
{
Image = flower,
Color = inputColor,
Intensity = 1F, // Default 1
};
return monoChrome.OutputImage;
}
void MonochromeExample()
{
var uiImage = new UIImage("Images/photo.jpg");
CGImage image = uiImage.CGImage;
var mono = new CIColorMonochrome
{
Color = CIColor.FromRgb(1, 1, 1),
Intensity = 1.0f,
Image = CIImage.FromCGImage(image)
};
DisplayFilterOutput(mono, ImageView);
}