public void Begin(CGRect frame, NSView controlView)
{
var size = controlView.Frame.Size;
if (size.Width <= 0 || size.Height <= 0)
{
_realSize = null;
return;
}
if (_image == null || size != _image.Size)
{
if (_image != null)
{
_image.Dispose();
}
_image = new NSImage(size);
}
if (supportsConvertSizeToBacking)
{
_realSize = controlView.ConvertSizeToBacking(size);
}
else
{
_realSize = controlView.ConvertSizeToBase(size);
}
_image.LockFocusFlipped(!controlView.IsFlipped);
NSGraphicsContext.CurrentContext.GraphicsPort.ClearRect(new CGRect(CGPoint.Empty, size));
}
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 EmulatedFramebuffer(NSView view)
{
_logicalSize = view.Frame.Size;
var pixelSize = view.ConvertSizeToBacking(_logicalSize);
Width = (int)pixelSize.Width;
Height = (int)pixelSize.Height;
RowBytes = Width * 4;
Dpi = new Vector(96 * pixelSize.Width / _logicalSize.Width, 96 * pixelSize.Height / _logicalSize.Height);
Format = PixelFormat.Rgba8888;
Address = Marshal.AllocHGlobal(Height * RowBytes);
}
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();
}
}
