using CPF.Mac.Foundation;
using CPF.Mac.ObjCRuntime;
using System;
using System.Runtime.InteropServices;

namespace CPF.Mac.CoreGraphics
{
	public class CGContext : INativeObject, IDisposable
	{
		internal IntPtr handle;

		public IntPtr Handle => handle;

		public CGInterpolationQuality InterpolationQuality
		{
			get
			{
				return CGContextGetInterpolationQuality(handle);
			}
			set
			{
				CGContextSetInterpolationQuality(handle, value);
			}
		}

		public CGPoint TextPosition
		{
			get
			{
				return CGContextGetTextPosition(handle);
			}
			set
			{
				CGContextSetTextPosition(handle, value.X, value.Y);
			}
		}

		public CGAffineTransform TextMatrix
		{
			get
			{
				return CGContextGetTextMatrix(handle);
			}
			set
			{
				CGContextSetTextMatrix(handle, value);
			}
		}

		public CGContext(IntPtr handle)
		{
			if (handle == IntPtr.Zero)
			{
				throw new Exception("Invalid parameters to context creation");
			}
			CGContextRetain(handle);
			this.handle = handle;
		}

		internal CGContext()
		{
		}

		[Preserve(Conditional = true)]
		internal CGContext(IntPtr handle, bool owns)
		{
			if (!owns)
			{
				CGContextRetain(handle);
			}
			if (handle == IntPtr.Zero)
			{
				throw new Exception("Invalid handle");
			}
			this.handle = handle;
		}

		~CGContext()
		{
			Dispose(disposing: false);
		}

		public void Dispose()
		{
			Dispose(disposing: true);
			GC.SuppressFinalize(this);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextRelease(IntPtr handle);

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextRetain(IntPtr handle);

		protected virtual void Dispose(bool disposing)
		{
			if (handle != IntPtr.Zero)
			{
				CGContextRelease(handle);
				handle = IntPtr.Zero;
			}
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextSaveGState(IntPtr context);

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextRestoreGState(IntPtr context);

		public void SaveState()
		{
			CGContextSaveGState(handle);
		}

		public void RestoreState()
		{
			CGContextRestoreGState(handle);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextScaleCTM(IntPtr ctx, double sx, double sy);

		public void ScaleCTM(double sx, double sy)
		{
			CGContextScaleCTM(handle, sx, sy);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextTranslateCTM(IntPtr ctx, double tx, double ty);

		public void TranslateCTM(double tx, double ty)
		{
			CGContextTranslateCTM(handle, tx, ty);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextRotateCTM(IntPtr ctx, double angle);

		public void RotateCTM(double angle)
		{
			CGContextRotateCTM(handle, angle);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextConcatCTM(IntPtr ctx, CGAffineTransform transform);

		public void ConcatCTM(CGAffineTransform transform)
		{
			CGContextConcatCTM(handle, transform);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextSetLineWidth(IntPtr c, double width);

		public void SetLineWidth(double w)
		{
			CGContextSetLineWidth(handle, w);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextSetLineCap(IntPtr c, CGLineCap cap);

		public void SetLineCap(CGLineCap cap)
		{
			CGContextSetLineCap(handle, cap);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextSetLineJoin(IntPtr c, CGLineJoin join);

		public void SetLineJoin(CGLineJoin join)
		{
			CGContextSetLineJoin(handle, join);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextSetMiterLimit(IntPtr c, double limit);

		public void SetMiterLimit(double limit)
		{
			CGContextSetMiterLimit(handle, limit);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextSetLineDash(IntPtr c, double phase, double[] lengths, long count);

		public void SetLineDash(double phase, double[] lengths)
		{
			SetLineDash(phase, lengths, lengths.Length);
		}

		public void SetLineDash(double phase, double[] lengths, int n)
		{
			if (lengths == null)
			{
				n = 0;
			}
			else if (n < 0 || n > lengths.Length)
			{
				throw new ArgumentException("n");
			}
			CGContextSetLineDash(handle, phase, lengths, n);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextSetFlatness(IntPtr c, double flatness);

		public void SetFlatness(double flatness)
		{
			CGContextSetFlatness(handle, flatness);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextSetAlpha(IntPtr c, double alpha);

		public void SetAlpha(double alpha)
		{
			CGContextSetAlpha(handle, alpha);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextSetBlendMode(IntPtr context, CGBlendMode mode);

		public void SetBlendMode(CGBlendMode mode)
		{
			CGContextSetBlendMode(handle, mode);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern CGAffineTransform CGContextGetCTM(IntPtr c);

		public CGAffineTransform GetCTM()
		{
			return CGContextGetCTM(handle);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextBeginPath(IntPtr c);

		public void BeginPath()
		{
			CGContextBeginPath(handle);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextMoveToPoint(IntPtr c, double x, double y);

		public void MoveTo(double x, double y)
		{
			CGContextMoveToPoint(handle, x, y);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextAddLineToPoint(IntPtr c, double x, double y);

		public void AddLineToPoint(double x, double y)
		{
			CGContextAddLineToPoint(handle, x, y);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextAddCurveToPoint(IntPtr c, double cp1x, double cp1y, double cp2x, double cp2y, double x, double y);

		public void AddCurveToPoint(double cp1x, double cp1y, double cp2x, double cp2y, double x, double y)
		{
			CGContextAddCurveToPoint(handle, cp1x, cp1y, cp2x, cp2y, x, y);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextAddQuadCurveToPoint(IntPtr c, double cpx, double cpy, double x, double y);

		public void AddQuadCurveToPoint(double cpx, double cpy, double x, double y)
		{
			CGContextAddQuadCurveToPoint(handle, cpx, cpy, x, y);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextClosePath(IntPtr c);

		public void ClosePath()
		{
			CGContextClosePath(handle);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextAddRect(IntPtr c, CGRect rect);

		public void AddRect(CGRect rect)
		{
			CGContextAddRect(handle, rect);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextAddRects(IntPtr c, CGRect[] rects, IntPtr size_t_count);

		public void AddRects(CGRect[] rects)
		{
			CGContextAddRects(handle, rects, new IntPtr(rects.Length));
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextAddLines(IntPtr c, CGPoint[] points, IntPtr size_t_count);

		public void AddLines(CGPoint[] points)
		{
			CGContextAddLines(handle, points, new IntPtr(points.Length));
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextAddEllipseInRect(IntPtr context, CGRect rect);

		public void AddEllipseInRect(CGRect rect)
		{
			CGContextAddEllipseInRect(handle, rect);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextAddArc(IntPtr c, double x, double y, double radius, double startAngle, double endAngle, int clockwise);

		public void AddArc(double x, double y, double radius, double startAngle, double endAngle, bool clockwise)
		{
			CGContextAddArc(handle, x, y, radius, startAngle, endAngle, clockwise ? 1 : 0);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextAddArcToPoint(IntPtr c, double x1, double y1, double x2, double y2, double radius);

		public void AddArcToPoint(double x1, double y1, double x2, double y2, double radius)
		{
			CGContextAddArcToPoint(handle, x1, y1, x2, y2, radius);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextAddPath(IntPtr context, IntPtr path_ref);

		public void AddPath(CGPath path)
		{
			CGContextAddPath(handle, path.handle);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextReplacePathWithStrokedPath(IntPtr c);

		public void ReplacePathWithStrokedPath()
		{
			CGContextReplacePathWithStrokedPath(handle);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern int CGContextIsPathEmpty(IntPtr c);

		public bool IsPathEmpty()
		{
			return CGContextIsPathEmpty(handle) != 0;
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern CGPoint CGContextGetPathCurrentPoint(IntPtr c);

		public CGPoint GetPathCurrentPoint()
		{
			return CGContextGetPathCurrentPoint(handle);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern CGRect CGContextGetPathBoundingBox(IntPtr c);

		public CGRect GetPathBoundingBox()
		{
			return CGContextGetPathBoundingBox(handle);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern int CGContextPathContainsPoint(IntPtr context, CGPoint point, CGPathDrawingMode mode);

		public bool PathContainsPoint(CGPoint point, CGPathDrawingMode mode)
		{
			return CGContextPathContainsPoint(handle, point, mode) != 0;
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextDrawPath(IntPtr c, CGPathDrawingMode mode);

		public void DrawPath(CGPathDrawingMode mode)
		{
			CGContextDrawPath(handle, mode);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextFillPath(IntPtr c);

		public void FillPath()
		{
			CGContextFillPath(handle);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextEOFillPath(IntPtr c);

		public void EOFillPath()
		{
			CGContextEOFillPath(handle);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextStrokePath(IntPtr c);

		public void StrokePath()
		{
			CGContextStrokePath(handle);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextFillRect(IntPtr c, CGRect rect);

		public void FillRect(CGRect rect)
		{
			CGContextFillRect(handle, rect);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextFillRects(IntPtr c, CGRect[] rects, IntPtr size_t_count);

		public void ContextFillRects(CGRect[] rects)
		{
			CGContextFillRects(handle, rects, new IntPtr(rects.Length));
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextStrokeRect(IntPtr c, CGRect rect);

		public void StrokeRect(CGRect rect)
		{
			CGContextStrokeRect(handle, rect);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextStrokeRectWithWidth(IntPtr c, CGRect rect, double width);

		public void StrokeRectWithWidth(CGRect rect, double width)
		{
			CGContextStrokeRectWithWidth(handle, rect, width);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextClearRect(IntPtr c, CGRect rect);

		public void ClearRect(CGRect rect)
		{
			CGContextClearRect(handle, rect);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextFillEllipseInRect(IntPtr context, CGRect rect);

		public void FillEllipseInRect(CGRect rect)
		{
			CGContextFillEllipseInRect(handle, rect);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextStrokeEllipseInRect(IntPtr context, CGRect rect);

		public void StrokeEllipseInRect(CGRect rect)
		{
			CGContextStrokeEllipseInRect(handle, rect);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextStrokeLineSegments(IntPtr c, CGPoint[] points, IntPtr size_t_count);

		public void StrokeLineSegments(CGPoint[] points)
		{
			CGContextStrokeLineSegments(handle, points, new IntPtr(points.Length));
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextClip(IntPtr c);

		public void Clip()
		{
			CGContextClip(handle);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextEOClip(IntPtr c);

		public void EOClip()
		{
			CGContextEOClip(handle);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextClipToMask(IntPtr c, CGRect rect, IntPtr mask);

		public void ClipToMask(CGRect rect, CGImage mask)
		{
			CGContextClipToMask(handle, rect, mask.handle);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern CGRect CGContextGetClipBoundingBox(IntPtr c);

		public CGRect GetClipBoundingBox()
		{
			return CGContextGetClipBoundingBox(handle);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextClipToRect(IntPtr c, CGRect rect);

		public void ClipToRect(CGRect rect)
		{
			CGContextClipToRect(handle, rect);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextClipToRects(IntPtr c, CGRect[] rects, IntPtr size_t_count);

		public void ClipToRects(CGRect[] rects)
		{
			CGContextClipToRects(handle, rects, new IntPtr(rects.Length));
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextSetFillColorWithColor(IntPtr c, IntPtr color);

		public void SetFillColor(CGColor color)
		{
			CGContextSetFillColorWithColor(handle, color.handle);
		}

		[Advice("Use SetFillColor() instead.")]
		public void SetFillColorWithColor(CGColor color)
		{
			CGContextSetFillColorWithColor(handle, color.handle);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextSetStrokeColorWithColor(IntPtr c, IntPtr color);

		public void SetStrokeColor(CGColor color)
		{
			CGContextSetStrokeColorWithColor(handle, color.handle);
		}

		[Advice("Use SetStrokeColor() instead.")]
		public void SetStrokeColorWithColor(CGColor color)
		{
			CGContextSetStrokeColorWithColor(handle, color.handle);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextSetFillColorSpace(IntPtr context, IntPtr space);

		public void SetFillColorSpace(CGColorSpace space)
		{
			CGContextSetFillColorSpace(handle, space.handle);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextSetStrokeColorSpace(IntPtr context, IntPtr space);

		public void SetStrokeColorSpace(CGColorSpace space)
		{
			CGContextSetStrokeColorSpace(handle, space.handle);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextSetFillColor(IntPtr context, double[] components);

		public void SetFillColor(double[] components)
		{
			if (components == null)
			{
				throw new ArgumentNullException("components");
			}
			CGContextSetFillColor(handle, components);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextSetStrokeColor(IntPtr context, double[] components);

		public void SetStrokeColor(double[] components)
		{
			if (components == null)
			{
				throw new ArgumentNullException("components");
			}
			CGContextSetStrokeColor(handle, components);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextSetFillPattern(IntPtr context, IntPtr pattern, double[] components);

		public void SetFillPattern(CGPattern pattern, double[] components)
		{
			if (components == null)
			{
				throw new ArgumentNullException("components");
			}
			CGContextSetFillPattern(handle, pattern.handle, components);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextSetStrokePattern(IntPtr context, IntPtr pattern, double[] components);

		public void SetStrokePattern(CGPattern pattern, double[] components)
		{
			if (components == null)
			{
				throw new ArgumentNullException("components");
			}
			CGContextSetStrokePattern(handle, pattern.handle, components);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextSetPatternPhase(IntPtr context, CGSize phase);

		public void SetPatternPhase(CGSize phase)
		{
			CGContextSetPatternPhase(handle, phase);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextSetGrayFillColor(IntPtr context, double gray, double alpha);

		public void SetFillColor(double gray, double alpha)
		{
			CGContextSetGrayFillColor(handle, gray, alpha);
		}

		[Advice("Use SetFillColor() instead.")]
		public void SetGrayFillColor(double gray, double alpha)
		{
			CGContextSetGrayFillColor(handle, gray, alpha);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextSetGrayStrokeColor(IntPtr context, double gray, double alpha);

		public void SetStrokeColor(double gray, double alpha)
		{
			CGContextSetGrayStrokeColor(handle, gray, alpha);
		}

		[Advice("Use SetStrokeColor() instead.")]
		public void SetGrayStrokeColor(double gray, double alpha)
		{
			CGContextSetGrayStrokeColor(handle, gray, alpha);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextSetRGBFillColor(IntPtr context, double red, double green, double blue, double alpha);

		public void SetFillColor(double red, double green, double blue, double alpha)
		{
			CGContextSetRGBFillColor(handle, red, green, blue, alpha);
		}

		[Advice("Use SetFillColor() instead.")]
		public void SetRGBFillColor(double red, double green, double blue, double alpha)
		{
			CGContextSetRGBFillColor(handle, red, green, blue, alpha);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextSetRGBStrokeColor(IntPtr context, double red, double green, double blue, double alpha);

		public void SetStrokeColor(double red, double green, double blue, double alpha)
		{
			CGContextSetRGBStrokeColor(handle, red, green, blue, alpha);
		}

		[Advice("Use SetStrokeColor() instead.")]
		public void SetRGBStrokeColor(double red, double green, double blue, double alpha)
		{
			CGContextSetRGBStrokeColor(handle, red, green, blue, alpha);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextSetCMYKFillColor(IntPtr context, double cyan, double magenta, double yellow, double black, double alpha);

		public void SetFillColor(double cyan, double magenta, double yellow, double black, double alpha)
		{
			CGContextSetCMYKFillColor(handle, cyan, magenta, yellow, black, alpha);
		}

		[Advice("Use SetFillColor() instead.")]
		public void SetCMYKFillColor(double cyan, double magenta, double yellow, double black, double alpha)
		{
			CGContextSetCMYKFillColor(handle, cyan, magenta, yellow, black, alpha);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextSetCMYKStrokeColor(IntPtr context, double cyan, double magenta, double yellow, double black, double alpha);

		public void SetStrokeColor(double cyan, double magenta, double yellow, double black, double alpha)
		{
			CGContextSetCMYKStrokeColor(handle, cyan, magenta, yellow, black, alpha);
		}

		[Advice("Use SetStrokeColor() instead.")]
		public void SetCMYKStrokeColor(double cyan, double magenta, double yellow, double black, double alpha)
		{
			CGContextSetCMYKStrokeColor(handle, cyan, magenta, yellow, black, alpha);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextSetRenderingIntent(IntPtr context, CGColorRenderingIntent intent);

		public void SetRenderingIntent(CGColorRenderingIntent intent)
		{
			CGContextSetRenderingIntent(handle, intent);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextDrawImage(IntPtr c, CGRect rect, IntPtr image);

		public void DrawImage(CGRect rect, CGImage image)
		{
			CGContextDrawImage(handle, rect, image.handle);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextDrawTiledImage(IntPtr c, CGRect rect, IntPtr image);

		public void DrawTiledImage(CGRect rect, CGImage image)
		{
			CGContextDrawTiledImage(handle, rect, image.handle);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern CGInterpolationQuality CGContextGetInterpolationQuality(IntPtr context);

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextSetInterpolationQuality(IntPtr context, CGInterpolationQuality quality);

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextSetShadowWithColor(IntPtr context, CGSize offset, double blur, IntPtr color);

		public void SetShadowWithColor(CGSize offset, double blur, CGColor color)
		{
			CGContextSetShadowWithColor(handle, offset, blur, color.handle);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextSetShadow(IntPtr context, CGSize offset, double blur);

		public void SetShadow(CGSize offset, double blur)
		{
			CGContextSetShadow(handle, offset, blur);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextDrawLinearGradient(IntPtr context, IntPtr gradient, CGPoint startPoint, CGPoint endPoint, CGGradientDrawingOptions options);

		public void DrawLinearGradient(CGGradient gradient, CGPoint startPoint, CGPoint endPoint, CGGradientDrawingOptions options)
		{
			CGContextDrawLinearGradient(handle, gradient.handle, startPoint, endPoint, options);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextDrawRadialGradient(IntPtr context, IntPtr gradient, CGPoint startCenter, double startRadius, CGPoint endCenter, double endRadius, CGGradientDrawingOptions options);

		public void DrawRadialGradient(CGGradient gradient, CGPoint startCenter, double startRadius, CGPoint endCenter, double endRadius, CGGradientDrawingOptions options)
		{
			CGContextDrawRadialGradient(handle, gradient.handle, startCenter, startRadius, endCenter, endRadius, options);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextDrawShading(IntPtr context, IntPtr shading);

		public void DrawShading(CGShading shading)
		{
			CGContextDrawShading(handle, shading.handle);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextSetCharacterSpacing(IntPtr context, double spacing);

		public void SetCharacterSpacing(double spacing)
		{
			CGContextSetCharacterSpacing(handle, spacing);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextSetTextPosition(IntPtr c, double x, double y);

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern CGPoint CGContextGetTextPosition(IntPtr context);

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextSetTextMatrix(IntPtr c, CGAffineTransform t);

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern CGAffineTransform CGContextGetTextMatrix(IntPtr c);

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextSetTextDrawingMode(IntPtr c, CGTextDrawingMode mode);

		public void SetTextDrawingMode(CGTextDrawingMode mode)
		{
			CGContextSetTextDrawingMode(handle, mode);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextSetFont(IntPtr c, IntPtr font);

		public void SetFont(CGFont font)
		{
			CGContextSetFont(handle, font.handle);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextSetFontSize(IntPtr c, double size);

		public void SetFontSize(double size)
		{
			CGContextSetFontSize(handle, size);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextSelectFont(IntPtr c, string name, double size, CGTextEncoding textEncoding);

		public void SelectFont(string name, double size, CGTextEncoding textEncoding)
		{
			if (name == null)
			{
				throw new ArgumentNullException("name");
			}
			CGContextSelectFont(handle, name, size, textEncoding);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextShowGlyphsAtPositions(IntPtr context, ushort[] glyphs, CGPoint[] positions, IntPtr size_t_count);

		public void ShowGlyphsAtPositions(ushort[] glyphs, CGPoint[] positions, int size_t_count)
		{
			if (positions == null)
			{
				throw new ArgumentNullException("positions");
			}
			if (glyphs == null)
			{
				throw new ArgumentNullException("glyphs");
			}
			CGContextShowGlyphsAtPositions(handle, glyphs, positions, new IntPtr(size_t_count));
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextShowText(IntPtr c, string s, IntPtr size_t_length);

		public void ShowText(string str, int count)
		{
			if (str == null)
			{
				throw new ArgumentNullException("str");
			}
			if (count > str.Length)
			{
				throw new ArgumentException("count");
			}
			CGContextShowText(handle, str, new IntPtr(count));
		}

		public void ShowText(string str)
		{
			if (str == null)
			{
				throw new ArgumentNullException("str");
			}
			CGContextShowText(handle, str, new IntPtr(str.Length));
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextShowText(IntPtr c, byte[] bytes, IntPtr size_t_length);

		public void ShowText(byte[] bytes, int count)
		{
			if (bytes == null)
			{
				throw new ArgumentNullException("bytes");
			}
			if (count > bytes.Length)
			{
				throw new ArgumentException("count");
			}
			CGContextShowText(handle, bytes, new IntPtr(count));
		}

		public void ShowText(byte[] bytes)
		{
			if (bytes == null)
			{
				throw new ArgumentNullException("bytes");
			}
			CGContextShowText(handle, bytes, new IntPtr(bytes.Length));
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextShowTextAtPoint(IntPtr c, double x, double y, string str, IntPtr size_t_length);

		public void ShowTextAtPoint(double x, double y, string str, int length)
		{
			if (str == null)
			{
				throw new ArgumentNullException("str");
			}
			CGContextShowTextAtPoint(handle, x, y, str, new IntPtr(length));
		}

		public void ShowTextAtPoint(double x, double y, string str)
		{
			if (str == null)
			{
				throw new ArgumentNullException("str");
			}
			CGContextShowTextAtPoint(handle, x, y, str, new IntPtr(str.Length));
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextShowTextAtPoint(IntPtr c, double x, double y, byte[] bytes, IntPtr size_t_length);

		public void ShowTextAtPoint(double x, double y, byte[] bytes, int length)
		{
			if (bytes == null)
			{
				throw new ArgumentNullException("bytes");
			}
			CGContextShowTextAtPoint(handle, x, y, bytes, new IntPtr(length));
		}

		public void ShowTextAtPoint(double x, double y, byte[] bytes)
		{
			if (bytes == null)
			{
				throw new ArgumentNullException("bytes");
			}
			CGContextShowTextAtPoint(handle, x, y, bytes, new IntPtr(bytes.Length));
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextShowGlyphs(IntPtr c, ushort[] glyphs, IntPtr size_t_count);

		public void ShowGlyphs(ushort[] glyphs)
		{
			if (glyphs == null)
			{
				throw new ArgumentNullException("glyphs");
			}
			CGContextShowGlyphs(handle, glyphs, new IntPtr(glyphs.Length));
		}

		public void ShowGlyphs(ushort[] glyphs, int count)
		{
			if (glyphs == null)
			{
				throw new ArgumentNullException("glyphs");
			}
			if (count > glyphs.Length)
			{
				throw new ArgumentException("count");
			}
			CGContextShowGlyphs(handle, glyphs, new IntPtr(count));
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextShowGlyphsAtPoint(IntPtr context, double x, double y, ushort[] glyphs, IntPtr size_t_count);

		public void ShowGlyphsAtPoint(double x, double y, ushort[] glyphs, int count)
		{
			if (glyphs == null)
			{
				throw new ArgumentNullException("glyphs");
			}
			if (count > glyphs.Length)
			{
				throw new ArgumentException("count");
			}
			CGContextShowGlyphsAtPoint(handle, x, y, glyphs, new IntPtr(count));
		}

		public void ShowGlyphsAtPoint(double x, double y, ushort[] glyphs)
		{
			if (glyphs == null)
			{
				throw new ArgumentNullException("glyphs");
			}
			CGContextShowGlyphsAtPoint(handle, x, y, glyphs, new IntPtr(glyphs.Length));
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextShowGlyphsWithAdvances(IntPtr c, ushort[] glyphs, CGSize[] advances, IntPtr size_t_count);

		public void ShowGlyphsWithAdvances(ushort[] glyphs, CGSize[] advances, int count)
		{
			if (glyphs == null)
			{
				throw new ArgumentNullException("glyphs");
			}
			if (advances == null)
			{
				throw new ArgumentNullException("advances");
			}
			if (count > glyphs.Length || count > advances.Length)
			{
				throw new ArgumentException("count");
			}
			CGContextShowGlyphsWithAdvances(handle, glyphs, advances, new IntPtr(count));
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextDrawPDFPage(IntPtr c, IntPtr page);

		public void DrawPDFPage(CGPDFPage page)
		{
			CGContextDrawPDFPage(handle, page.handle);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextBeginPage(IntPtr c, ref CGRect mediaBox);

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextBeginPage(IntPtr c, IntPtr zero);

		public void BeginPage(CGRect? rect)
		{
			if (rect.HasValue)
			{
				CGRect mediaBox = rect.Value;
				CGContextBeginPage(handle, ref mediaBox);
			}
			else
			{
				CGContextBeginPage(handle, IntPtr.Zero);
			}
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextEndPage(IntPtr c);

		public void EndPage()
		{
			CGContextEndPage(handle);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextFlush(IntPtr c);

		public void Flush()
		{
			CGContextFlush(handle);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextSynchronize(IntPtr c);

		public void Synchronize()
		{
			CGContextSynchronize(handle);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextSetShouldAntialias(IntPtr c, int shouldAntialias);

		public void SetShouldAntialias(bool shouldAntialias)
		{
			CGContextSetShouldAntialias(handle, shouldAntialias ? 1 : 0);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextSetAllowsAntialiasing(IntPtr context, int allowsAntialiasing);

		public void SetAllowsAntialiasing(bool allowsAntialiasing)
		{
			CGContextSetAllowsAntialiasing(handle, allowsAntialiasing ? 1 : 0);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextSetShouldSmoothFonts(IntPtr c, int shouldSmoothFonts);

		public void SetShouldSmoothFonts(bool shouldSmoothFonts)
		{
			CGContextSetShouldSmoothFonts(handle, shouldSmoothFonts ? 1 : 0);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern CGAffineTransform CGContextGetUserSpaceToDeviceSpaceTransform(IntPtr context);

		public CGAffineTransform GetUserSpaceToDeviceSpaceTransform()
		{
			return CGContextGetUserSpaceToDeviceSpaceTransform(handle);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern CGPoint CGContextConvertPointToDeviceSpace(IntPtr context, CGPoint point);

		public CGPoint PointToDeviceSpace(CGPoint point)
		{
			return CGContextConvertPointToDeviceSpace(handle, point);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern CGPoint CGContextConvertPointToUserSpace(IntPtr context, CGPoint point);

		public CGPoint ConvertPointToUserSpace(CGPoint point)
		{
			return CGContextConvertPointToUserSpace(handle, point);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern CGSize CGContextConvertSizeToDeviceSpace(IntPtr context, CGSize size);

		public CGSize ConvertSizeToDeviceSpace(CGSize size)
		{
			return CGContextConvertSizeToDeviceSpace(handle, size);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern CGSize CGContextConvertSizeToUserSpace(IntPtr context, CGSize size);

		public CGSize ConvertSizeToUserSpace(CGSize size)
		{
			return CGContextConvertSizeToUserSpace(handle, size);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern CGRect CGContextConvertRectToDeviceSpace(IntPtr context, CGRect rect);

		public CGRect ConvertRectToDeviceSpace(CGRect rect)
		{
			return CGContextConvertRectToDeviceSpace(handle, rect);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern CGRect CGContextConvertRectToUserSpace(IntPtr context, CGRect rect);

		public CGRect ConvertRectToUserSpace(CGRect rect)
		{
			return CGContextConvertRectToUserSpace(handle, rect);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextDrawLayerInRect(IntPtr context, CGRect rect, IntPtr layer);

		public void DrawLayer(CGLayer layer, CGRect rect)
		{
			if (layer == null)
			{
				throw new ArgumentNullException("layer");
			}
			CGContextDrawLayerInRect(handle, rect, layer.Handle);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern void CGContextDrawLayerAtPoint(IntPtr context, CGPoint rect, IntPtr layer);

		public void DrawLayer(CGLayer layer, CGPoint point)
		{
			if (layer == null)
			{
				throw new ArgumentNullException("layer");
			}
			CGContextDrawLayerAtPoint(handle, point, layer.Handle);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern IntPtr CGContextCopyPath(IntPtr context);

		[Since(4, 0)]
		public CGPath CopyPath()
		{
			return new CGPath(CGContextCopyPath(handle), owns: true);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern IntPtr CGContextSetAllowsFontSmoothing(IntPtr context, bool allows);

		[Since(4, 0)]
		public void SetAllowsFontSmoothing(bool allows)
		{
			CGContextSetAllowsFontSmoothing(handle, allows);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern IntPtr CGContextSetAllowsFontSubpixelPositioning(IntPtr context, bool allows);

		[Since(4, 0)]
		public void SetAllowsSubpixelPositioning(bool allows)
		{
			CGContextSetAllowsFontSubpixelPositioning(handle, allows);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern IntPtr CGContextSetAllowsFontSubpixelQuantization(IntPtr context, bool allows);

		[Since(4, 0)]
		public void SetAllowsFontSubpixelQuantization(bool allows)
		{
			CGContextSetAllowsFontSubpixelQuantization(handle, allows);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern IntPtr CGContextSetShouldSubpixelPositionFonts(IntPtr context, bool should);

		[Since(4, 0)]
		public void SetShouldSubpixelPositionFonts(bool shouldSubpixelPositionFonts)
		{
			CGContextSetShouldSubpixelPositionFonts(handle, shouldSubpixelPositionFonts);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern IntPtr CGContextSetShouldSubpixelQuantizeFonts(IntPtr context, bool should);

		[Since(4, 0)]
		public void ShouldSubpixelQuantizeFonts(bool shouldSubpixelQuantizeFonts)
		{
			CGContextSetShouldSubpixelQuantizeFonts(handle, shouldSubpixelQuantizeFonts);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern IntPtr CGContextBeginTransparencyLayer(IntPtr context, IntPtr dictionary);

		public void BeginTransparencyLayer()
		{
			CGContextBeginTransparencyLayer(handle, IntPtr.Zero);
		}

		public void BeginTransparencyLayer(NSDictionary auxiliaryInfo = null)
		{
			CGContextBeginTransparencyLayer(handle, auxiliaryInfo?.Handle ?? IntPtr.Zero);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern IntPtr CGContextBeginTransparencyLayerWithRect(IntPtr context, CGRect rect, IntPtr dictionary);

		public void BeginTransparencyLayer(CGRect rectangle, NSDictionary auxiliaryInfo = null)
		{
			CGContextBeginTransparencyLayerWithRect(handle, rectangle, auxiliaryInfo?.Handle ?? IntPtr.Zero);
		}

		public void BeginTransparencyLayer(CGRect rectangle)
		{
			CGContextBeginTransparencyLayerWithRect(handle, rectangle, IntPtr.Zero);
		}

		[DllImport("/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/CoreGraphics")]
		private static extern IntPtr CGContextEndTransparencyLayer(IntPtr context);

		public void EndTransparencyLayer()
		{
			CGContextEndTransparencyLayer(handle);
		}
	}
}