public static void Colourize(NSView control, Color color, Action drawAction)
{
var size = control.Frame.Size;
if (size.Width <= 0 || size.Height <= 0)
{
return;
}
var image = new NSImage(size);
image.LockFocusFlipped(control.IsFlipped);
drawAction();
image.UnlockFocus();
var ciImage = CIImage.FromCGImage(image.CGImage);
SD.SizeF realSize;
if (control.RespondsToSelector(selConvertSizeToBacking))
{
realSize = control.ConvertSizeToBacking(size);
}
else
{
realSize = control.ConvertSizeToBase(size);
}
if (control.IsFlipped)
{
var affineTransform = new NSAffineTransform();
affineTransform.Translate(0, realSize.Height);
affineTransform.Scale(1, -1);
var filter1 = new CIAffineTransform();
filter1.Image = ciImage;
filter1.SetValueForKey(affineTransform, CIInputTransform);
ciImage = filter1.ValueForKey(CIOutputImage) as CIImage;
}
var filter2 = new CIColorControls();
filter2.SetDefaults();
filter2.Image = ciImage;
filter2.Saturation = 0.0f;
ciImage = filter2.ValueForKey(CIOutputImage) as CIImage;
var filter3 = new CIColorMatrix();
filter3.SetDefaults();
filter3.Image = ciImage;
filter3.RVector = new CIVector(0, color.R, 0);
filter3.GVector = new CIVector(color.G, 0, 0);
filter3.BVector = new CIVector(0, 0, color.B);
ciImage = filter3.ValueForKey(CIOutputImage) as CIImage;
ciImage.Draw(new SD.RectangleF(SD.PointF.Empty, size), new SD.RectangleF(SD.PointF.Empty, realSize), NSCompositingOperation.SourceOver, 1);
}
public void End()
{
if (_image == null)
{
return;
}
_image.UnlockFocus();
var cgImage = _image.CGImage;
var ciImage = CIImage.FromCGImage(cgImage);
#pragma warning disable CS0618 // Image => InputImage in Xamarin.Mac 6.6
var filter2 = new CIColorControls();
filter2.SetDefaults();
filter2.Image = ciImage;
filter2.Saturation = 0.0f;
ciImage = (CIImage)filter2.ValueForKey(CIOutputImage);
var filter3 = new CIColorMatrix();
filter3.SetDefaults();
filter3.Image = ciImage;
#pragma warning restore CS0618
var cgColor = Color.ToCG();
var components = cgColor.Components;
if (components.Length >= 3)
{
filter3.RVector = new CIVector(0, components[0], 0);
filter3.GVector = new CIVector(components[1], 0, 0);
filter3.BVector = new CIVector(0, 0, components[2]);
}
else if (components.Length >= 1)
{
// grayscale
filter3.RVector = new CIVector(0, components[0], 0);
filter3.GVector = new CIVector(components[0], 0, 0);
filter3.BVector = new CIVector(0, 0, components[0]);
}
filter3.AVector = new CIVector(0, 0, 0, cgColor.Alpha);
ciImage = (CIImage)filter3.ValueForKey(CIOutputImage);
// create separate context so we can force using the software renderer, which is more than fast enough for this
var ciContext = CIContext.FromContext(NSGraphicsContext.CurrentContext.GraphicsPort, new CIContextOptions {
UseSoftwareRenderer = true
});
ciContext.DrawImage(ciImage, new CGRect(CGPoint.Empty, _image.Size), new CGRect(0, 0, cgImage.Width, cgImage.Height));
ciImage.Dispose();
ciContext.Dispose();
filter2.Dispose();
filter3.Dispose();
}
public static void Colourize(NSView control, Color color, Action drawAction)
{
var size = control.Frame.Size;
if (size.Width <= 0 || size.Height <= 0)
{
return;
}
var image = new NSImage(size);
image.LockFocusFlipped(!control.IsFlipped);
drawAction();
image.UnlockFocus();
var ciImage = CIImage.FromCGImage(image.CGImage);
CGSize realSize;
if (control.RespondsToSelector(selConvertSizeToBacking))
{
realSize = control.ConvertSizeToBacking(size);
}
else
{
realSize = control.ConvertSizeToBase(size);
}
var filter2 = new CIColorControls();
filter2.SetDefaults();
filter2.Image = ciImage;
filter2.Saturation = 0.0f;
ciImage = (CIImage)filter2.ValueForKey(CIOutputImage);
var filter3 = new CIColorMatrix();
filter3.SetDefaults();
filter3.Image = ciImage;
filter3.RVector = new CIVector(0, color.R, 0);
filter3.GVector = new CIVector(color.G, 0, 0);
filter3.BVector = new CIVector(0, 0, color.B);
filter3.AVector = new CIVector(0, 0, 0, color.A);
ciImage = (CIImage)filter3.ValueForKey(CIOutputImage);
// create separate context so we can force using the software renderer, which is more than fast enough for this
var ciContext = CIContext.FromContext(NSGraphicsContext.CurrentContext.GraphicsPort, new CIContextOptions {
UseSoftwareRenderer = true
});
ciContext.DrawImage(ciImage, new CGRect(CGPoint.Empty, size), new CGRect(CGPoint.Empty, realSize));
}
public static void DrawWithColorTransform(this NSView view, Color?color, Action drawDelegate)
{
if (color.HasValue)
{
var size = view.Frame.Size;
if (size.Width <= 0 || size.Height <= 0)
{
return;
}
// render view to image
var image = new NSImage(size);
image.LockFocusFlipped(!view.IsFlipped);
drawDelegate();
image.UnlockFocus();
// create Core image for transformation
var ciImage = CIImage.FromCGImage(image.CGImage);
CGSize displaySize;
#pragma warning disable iOSAndMacApiUsageIssue
if (view.RespondsToSelector(selConvertSizeToBacking))
{
displaySize = view.ConvertSizeToBacking(size);
}
else
{
displaySize = view.ConvertSizeToBase(size);
}
#pragma warning restore iOSAndMacApiUsageIssue
// apply color matrix
var transformColor = new CIColorMatrix();
transformColor.SetDefaults();
transformColor.Image = ciImage;
transformColor.RVector = new CIVector(0, (float)color.Value.Red, 0);
transformColor.GVector = new CIVector((float)color.Value.Green, 0, 0);
transformColor.BVector = new CIVector(0, 0, (float)color.Value.Blue);
using (var key = new NSString("outputImage"))
ciImage = (CIImage)transformColor.ValueForKey(key);
var ciCtx = CIContext.FromContext(NSGraphicsContext.CurrentContext.GraphicsPort, null);
ciCtx.DrawImage(ciImage, new CGRect(CGPoint.Empty, size), new CGRect(CGPoint.Empty, displaySize));
}
else
{
drawDelegate();
}
}
public static void DrawWithColorTransform(this NSView view, Color?color, Action drawDelegate)
{
if (color.HasValue)
{
if (view.Frame.Size.Width <= 0 || view.Frame.Size.Height <= 0)
{
return;
}
// render view to image
var image = new NSImage(view.Frame.Size);
image.LockFocusFlipped(!view.IsFlipped);
drawDelegate();
image.UnlockFocus();
// create Core image for transformation
var rr = new RectangleF(0, 0, view.Frame.Size.Width, view.Frame.Size.Height);
var ciImage = CIImage.FromCGImage(image.AsCGImage(ref rr, NSGraphicsContext.CurrentContext, null));
// apply color matrix
var transformColor = new CIColorMatrix();
transformColor.SetDefaults();
transformColor.Image = ciImage;
transformColor.RVector = new CIVector(0, (float)color.Value.Red, 0);
transformColor.GVector = new CIVector((float)color.Value.Green, 0, 0);
transformColor.BVector = new CIVector(0, 0, (float)color.Value.Blue);
ciImage = (CIImage)transformColor.ValueForKey(new NSString("outputImage"));
var ciCtx = CIContext.FromContext(NSGraphicsContext.CurrentContext.GraphicsPort, null);
ciCtx.DrawImage(ciImage, rr, rr);
}
else
{
drawDelegate();
}
}