private void Pointalize()
{
CIVector center = CIVector.Create(Bounds.GetMidX(), Bounds.GetMidY());
CIFilter pointalize = CIFilter.FromName("CIPointillize");
pointalize.SetValueForKey(NSNumber.FromFloat(1), CIFilterInputKey.Radius);
pointalize.SetValueForKey(center, CIFilterInputKey.Center);
controls.ContentFilters = new CIFilter[] { pointalize };
}
CIImage CreateQRForString(NSString qrString, QRCodeCorrectionLevel level)
{
NSData strData = qrString.Encode(NSStringEncoding.UTF8);
// 创建filter
CIFilter qrFilter = CIFilter.FromName("CIQRCodeGenerator");
// 设置内容和纠错级别
qrFilter.SetValueForKey(strData, new NSString("inputMessage"));
qrFilter.SetValueForKey(new NSString(level.ToString()), new NSString("inputCorrectionLevel"));
// 返回CIImage
return(qrFilter.OutputImage);
}
private UIImage TransformeImage(UIImage image, CIImageOrientation orientation)
{
CIImage inputImage = CIImage.FromCGImage(image.CGImage);
inputImage = inputImage.CreateWithOrientation(orientation);
ciFilter.SetValueForKey(inputImage, CIFilterInputKey.Image);
CIImage outputImage = ciFilter.OutputImage;
using (CGImage cgImage = ciContext.CreateCGImage(outputImage, outputImage.Extent))
return(UIImage.FromImage(cgImage));
}
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);
}
void tintAdjusted(UISlider sender)
{
var filter = ciRawFilter;
if (filter == null)
{
return;
}
ciRawFilter.SetValueForKey(NSNumber.FromFloat(sender.Value), Keys.kCIInputNeutralTintKey);
ImageView.SetNeedsDisplay();
}
