mcs/class/System.Drawing/System.Drawing/carbonFunctions.cs

   1 //
   2 // System.Drawing.carbonFunctions.cs
   3 //
   4 // Authors:
   5 //      Geoff Norton (gnorton@customerdna.com>
   6 //
   7 // Copyright (C) 2004 Novell, Inc. (http://www.novell.com)
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28
  29 using System.Runtime.InteropServices;
  30
  31 namespace System.Drawing {
  32         internal class Carbon {
  33
  34                 internal static CarbonContext GetCGContextForNSView (IntPtr hwnd) {
  35                         IntPtr cgContext = IntPtr.Zero;
  36
  37                         cgContext = objc_msgSend (objc_msgSend (objc_getClass ("NSGraphicsContext"), sel_registerName ("currentContext")), sel_registerName ("graphicsPort"));
  38                         HIRect rect = new HIRect ();
  39                         objc_msgSend_stret (ref rect, hwnd, sel_registerName ("bounds"));
  40                         return new CarbonContext (cgContext, (int)rect.size.width, (int)rect.size.height);
  41                 }
  42                 internal static CarbonContext GetCGContextForView (IntPtr hwnd) {
  43                         IntPtr cgContext = IntPtr.Zero;
  44                         // Grab the window we're in
  45                         IntPtr window = Carbon.GetControlOwner (hwnd);
  46                         // Get the port of the window
  47                         IntPtr port = Carbon.GetWindowPort (window);
  48                         // Create a CGContext ref
  49                         Carbon.CreateCGContextForPort (port, ref cgContext);
  50
  51                         // Get the bounds of the window
  52                         QRect wBounds = new QRect ();
  53                         Carbon.GetWindowBounds (window, 32, ref wBounds);
  54
  55                         // Get the bounds of the view
  56                         HIRect vBounds = new HIRect ();
  57                         Carbon.HIViewGetBounds (hwnd, ref vBounds);
  58
  59                         // Convert the view local bounds to window coordinates
  60                         Carbon.HIViewConvertRect (ref vBounds, hwnd, IntPtr.Zero);
  61                         Carbon.CGContextTranslateCTM (cgContext, vBounds.origin.x, (wBounds.bottom-wBounds.top)-(vBounds.origin.y+vBounds.size.height));
  62                         /* FIXME: Do we need this or is it inherintly clipped */
  63                         HIRect rcClip = new HIRect ();
  64                         rcClip.origin.x = 0;
  65                         rcClip.origin.y = 0;
  66                         rcClip.size.width = vBounds.size.width;
  67                         rcClip.size.height = vBounds.size.height;
  68                         Carbon.CGContextClipToRect (cgContext, rcClip);
  69                         return new CarbonContext (cgContext, (int)vBounds.size.width, (int)vBounds.size.height);
  70                 }
  71                 #region Cocoa Methods
  72                 [DllImport("libobjc.dylib")]
  73                 public static extern IntPtr objc_getClass(string className);
  74                 [DllImport("libobjc.dylib")]
  75                 public static extern IntPtr objc_msgSend(IntPtr basePtr, IntPtr selector, string argument);
  76                 [DllImport("libobjc.dylib")]
  77                 public static extern IntPtr objc_msgSend(IntPtr basePtr, IntPtr selector);
  78                 [DllImport("libobjc.dylib")]
  79                 public static extern void objc_msgSend_stret(ref HIRect arect, IntPtr basePtr, IntPtr selector);
  80                 [DllImport("libobjc.dylib")]
  81                 public static extern IntPtr sel_registerName(string selectorName);
  82                 #endregion
  83
  84                 [DllImport("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
  85                 internal static extern int HIViewGetBounds (IntPtr vHnd, ref HIRect r);
  86                 [DllImport("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
  87                 internal static extern int HIViewConvertRect (ref HIRect r, IntPtr a, IntPtr b);
  88
  89                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
  90                 internal static extern IntPtr GetControlOwner (IntPtr aView);
  91
  92                 [DllImport("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
  93                 internal static extern int GetWindowBounds (IntPtr wHnd, uint reg, ref QRect rect);
  94                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
  95                 internal static extern IntPtr GetWindowPort (IntPtr hWnd);
  96                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
  97                 internal static extern int CGContextClipToRect (IntPtr cgContext, HIRect clip);
  98                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
  99                 internal static extern void CreateCGContextForPort (IntPtr port, ref IntPtr cgc);
 100                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 101                 internal static extern void CGContextTranslateCTM (IntPtr cgc, double tx, double ty);
 102                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 103                 internal static extern void CGContextScaleCTM (IntPtr cgc, double x, double y);
 104                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 105                 internal static extern void CGContextFlush (IntPtr cgc);
 106                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 107                 internal static extern void CGContextSynchronize (IntPtr cgc);
 108         }
 109
 110         internal struct CGSize {
 111                 public float width;
 112                 public float height;
 113         }
 114
 115         internal struct CGPoint {
 116                 public float x;
 117                 public float y;
 118         }
 119
 120         internal struct HIRect {
 121                 public CGPoint origin;
 122                 public CGSize size;
 123         }
 124
 125         internal struct QRect
 126         {
 127                 public short top;
 128                 public short left;
 129                 public short bottom;
 130                 public short right;
 131         }
 132
 133         internal struct CarbonContext
 134         {
 135                 public IntPtr ctx;
 136                 public int width;
 137                 public int height;
 138
 139                 public CarbonContext (IntPtr ctx, int width, int height)
 140                 {
 141                         this.ctx = ctx;
 142                         this.width = width;
 143                         this.height = height;
 144                 }
 145         }
 146 }