public static NSImage Tint(this NSImage image, NSColor tint)
{
CIFilter colorGenerator = CIFilter.FromName("CIConstantColorGenerator");
CIColor color = CIColor.FromCGColor(tint.ToCG());
colorGenerator.SetValueForKey(color, CIFilterInputKey.Color);
CIFilter colorFilter = CIFilter.FromName("CIColorControls");
colorFilter.SetValueForKey(colorGenerator.ValueForKey(CIFilterOutputKey.Image), CIFilterInputKey.Image);
colorFilter.SetValueForKey(NSNumber.FromFloat(3f), CIFilterInputKey.Saturation);
colorFilter.SetValueForKey(NSNumber.FromFloat(0.35f), CIFilterInputKey.Brightness);
colorFilter.SetValueForKey(NSNumber.FromFloat(1f), CIFilterInputKey.Contrast);
CIFilter monochromeFilter = CIFilter.FromName("CIColorMonochrome");
CIImage baseImage = CIImage.FromCGImage(image.CGImage);
monochromeFilter.SetValueForKey(baseImage, CIFilterInputKey.Image);
monochromeFilter.SetValueForKey(CIColor.FromRgb(0.75f, 0.75f, 0.75f), CIFilterInputKey.Color);
monochromeFilter.SetValueForKey(NSNumber.FromFloat(1f), CIFilterInputKey.Intensity);
CIFilter compositingFilter = CIFilter.FromName("CIMultiplyCompositing");
compositingFilter.SetValueForKey(colorFilter.ValueForKey(CIFilterOutputKey.Image), CIFilterInputKey.Image);
compositingFilter.SetValueForKey(monochromeFilter.ValueForKey(CIFilterOutputKey.Image), CIFilterInputKey.BackgroundImage);
CIImage outputImage = (CIImage)compositingFilter.ValueForKey(CIFilterOutputKey.Image);
var extent = outputImage.Extent;
var newsize = sd.Size.Truncate(extent.Size);
var tintedImage = new NSImage(newsize);
var newrep = new NSBitmapImageRep(IntPtr.Zero, newsize.Width, newsize.Height, 8, 4, true, false, NSColorSpace.DeviceRGB, 4 * newsize.Width, 32);
tintedImage.AddRepresentation(newrep);
var graphics = NSGraphicsContext.FromBitmap(newrep);
NSGraphicsContext.GlobalSaveGraphicsState();
NSGraphicsContext.CurrentContext = graphics;
var ciContext = CIContext.FromContext(graphics.GraphicsPort, new CIContextOptions {
UseSoftwareRenderer = true
});
ciContext.DrawImage(outputImage, extent, extent);
NSGraphicsContext.GlobalRestoreGraphicsState();
newrep.Size = image.Size;
return(tintedImage);
}
// On load, construct the CIRawFilter
public override void ViewDidLoad()
{
base.ViewDidLoad();
var asset = Asset;
if (asset == null)
{
return;
}
// Setup options to request original image.
var options = new PHImageRequestOptions {
Version = PHImageRequestOptionsVersion.Original,
Synchronous = true
};
// Request the image data and UTI type for the image.
PHImageManager.DefaultManager.RequestImageData(asset, options, (imageData, dataUTI, _, __) => {
if (imageData == null || dataUTI == null)
{
return;
}
// Create a CIRawFilter from original image data.
// UTI type is passed in to provide the CIRawFilter with a hint about the UTI type of the Raw file.
//var rawOptions = [String (kCGImageSourceTypeIdentifierHint) : dataUTI ]
var rawOptions = new NSMutableDictionary();
var imageIOLibrary = Dlfcn.dlopen("/System/Library/Frameworks/ImageIO.framework/ImageIO", 0);
var key = Dlfcn.GetIntPtr(imageIOLibrary, "kCGImageSourceTypeIdentifierHint");
rawOptions.LowlevelSetObject(dataUTI, key);
ciRawFilter = CIFilter.CreateRawFilter(imageData, rawOptions);
if (ciRawFilter == null)
{
return;
}
// Get the native size of the image produced by the CIRawFilter.
var sizeValue = ciRawFilter.ValueForKey(Keys.kCIOutputNativeSizeKey) as CIVector;
if (sizeValue != null)
{
imageNativeSize = new CGSize(sizeValue.X, sizeValue.Y);
}
// Record the original value of the temperature, and setup the editing slider.
var tempValue = (NSNumber)ciRawFilter.ValueForKey(Keys.kCIInputNeutralTemperatureKey);
if (tempValue != null)
{
originalTemp = tempValue.FloatValue;
TempSlider.SetValue(tempValue.FloatValue, animated: false);
}
// Record the original value of the tint, and setup the editing slider.
var tintValue = (NSNumber)ciRawFilter.ValueForKey(Keys.kCIInputNeutralTintKey);
if (tintValue != null)
{
originalTint = tintValue.FloatValue;
TintSlider.SetValue(tintValue.FloatValue, animated: false);
}
});
// Create EAGL context used to render the CIImage produced by the CIRawFilter to display.
ImageView.Context = new EAGLContext(EAGLRenderingAPI.OpenGLES3);
ciContext = CIContext.FromContext(ImageView.Context, new CIContextOptions {
CIImageFormat = CIImage.FormatRGBAh
});
}
// On load, construct the CIRawFilter
public override void ViewDidLoad ()
{
base.ViewDidLoad ();
var asset = Asset;
if (asset == null)
return;
// Setup options to request original image.
var options = new PHImageRequestOptions {
Version = PHImageRequestOptionsVersion.Original,
Synchronous = true
};
// Request the image data and UTI type for the image.
PHImageManager.DefaultManager.RequestImageData (asset, options, (imageData, dataUTI, _, __) => {
if (imageData == null || dataUTI == null)
return;
// Create a CIRawFilter from original image data.
// UTI type is passed in to provide the CIRawFilter with a hint about the UTI type of the Raw file.
//var rawOptions = [String (kCGImageSourceTypeIdentifierHint) : dataUTI ]
var rawOptions = new NSMutableDictionary ();
var imageIOLibrary = Dlfcn.dlopen ("/System/Library/Frameworks/ImageIO.framework/ImageIO", 0);
var key = Dlfcn.GetIntPtr (imageIOLibrary, "kCGImageSourceTypeIdentifierHint");
rawOptions.LowlevelSetObject (dataUTI, key);
ciRawFilter = CIFilter.CreateRawFilter (imageData, rawOptions);
if (ciRawFilter == null)
return;
// Get the native size of the image produced by the CIRawFilter.
var sizeValue = ciRawFilter.ValueForKey (Keys.kCIOutputNativeSizeKey) as CIVector;
if (sizeValue != null)
imageNativeSize = new CGSize (sizeValue.X, sizeValue.Y);
// Record the original value of the temperature, and setup the editing slider.
var tempValue = (NSNumber)ciRawFilter.ValueForKey (Keys.kCIInputNeutralTemperatureKey);
if (tempValue != null) {
originalTemp = tempValue.FloatValue;
TempSlider.SetValue (tempValue.FloatValue, animated: false);
}
// Record the original value of the tint, and setup the editing slider.
var tintValue = (NSNumber)ciRawFilter.ValueForKey (Keys.kCIInputNeutralTintKey);
if (tintValue != null) {
originalTint = tintValue.FloatValue;
TintSlider.SetValue (tintValue.FloatValue, animated: false);
}
});
// Create EAGL context used to render the CIImage produced by the CIRawFilter to display.
ImageView.Context = new EAGLContext (EAGLRenderingAPI.OpenGLES3);
ciContext = CIContext.FromContext (ImageView.Context, new CIContextOptions { CIImageFormat = CIImage.FormatRGBAh });
}
