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 using System.Security;
  31
  32 namespace System.Drawing {
  33
  34         [SuppressUnmanagedCodeSecurity]
  35         internal class Carbon {
  36
  37                 internal static CarbonContext GetCGContextForNSView (IntPtr hwnd) {
  38                         IntPtr cgContext = IntPtr.Zero;
  39
  40                         cgContext = objc_msgSend (objc_msgSend (objc_getClass ("NSGraphicsContext"), sel_registerName ("currentContext")), sel_registerName ("graphicsPort"));
  41                         HIRect rect = new HIRect ();
  42                         objc_msgSend_stret (ref rect, hwnd, sel_registerName ("bounds"));
  43                         return new CarbonContext (cgContext, (int)rect.size.width, (int)rect.size.height);
  44                 }
  45                 internal static CarbonContext GetCGContextForView (IntPtr hwnd) {
  46                         IntPtr cgContext = IntPtr.Zero;
  47                         // Grab the window we're in
  48                         IntPtr window = Carbon.GetControlOwner (hwnd);
  49                         // Get the port of the window
  50                         IntPtr port = Carbon.GetWindowPort (window);
  51                         // Create a CGContext ref
  52                         Carbon.CreateCGContextForPort (port, ref cgContext);
  53
  54                         // Get the bounds of the window
  55                         QRect wBounds = new QRect ();
  56                         Carbon.GetWindowBounds (window, 32, ref wBounds);
  57
  58                         // Get the bounds of the view
  59                         HIRect vBounds = new HIRect ();
  60                         Carbon.HIViewGetBounds (hwnd, ref vBounds);
  61
  62                         // Convert the view local bounds to window coordinates
  63                         Carbon.HIViewConvertRect (ref vBounds, hwnd, IntPtr.Zero);
  64                         Carbon.CGContextTranslateCTM (cgContext, vBounds.origin.x, (wBounds.bottom-wBounds.top)-(vBounds.origin.y+vBounds.size.height));
  65                         /* FIXME: Do we need this or is it inherintly clipped */
  66                         HIRect rcClip = new HIRect ();
  67                         rcClip.origin.x = 0;
  68                         rcClip.origin.y = 0;
  69                         rcClip.size.width = vBounds.size.width;
  70                         rcClip.size.height = vBounds.size.height;
  71                         Carbon.CGContextClipToRect (cgContext, rcClip);
  72                         return new CarbonContext (cgContext, (int)vBounds.size.width, (int)vBounds.size.height);
  73                 }
  74                 #region Cocoa Methods
  75                 [DllImport("libobjc.dylib")]
  76                 public static extern IntPtr objc_getClass(string className);
  77                 [DllImport("libobjc.dylib")]
  78                 public static extern IntPtr objc_msgSend(IntPtr basePtr, IntPtr selector, string argument);
  79                 [DllImport("libobjc.dylib")]
  80                 public static extern IntPtr objc_msgSend(IntPtr basePtr, IntPtr selector);
  81                 [DllImport("libobjc.dylib")]
  82                 public static extern void objc_msgSend_stret(ref HIRect arect, IntPtr basePtr, IntPtr selector);
  83                 [DllImport("libobjc.dylib")]
  84                 public static extern IntPtr sel_registerName(string selectorName);
  85                 #endregion
  86
  87                 [DllImport("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
  88                 internal static extern int HIViewGetBounds (IntPtr vHnd, ref HIRect r);
  89                 [DllImport("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
  90                 internal static extern int HIViewConvertRect (ref HIRect r, IntPtr a, IntPtr b);
  91
  92                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
  93                 internal static extern IntPtr GetControlOwner (IntPtr aView);
  94
  95                 [DllImport("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
  96                 internal static extern int GetWindowBounds (IntPtr wHnd, uint reg, ref QRect rect);
  97                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
  98                 internal static extern IntPtr GetWindowPort (IntPtr hWnd);
  99                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 100                 internal static extern int CGContextClipToRect (IntPtr cgContext, HIRect clip);
 101                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 102                 internal static extern void CreateCGContextForPort (IntPtr port, ref IntPtr cgc);
 103                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 104                 internal static extern void CGContextTranslateCTM (IntPtr cgc, double tx, double ty);
 105                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 106                 internal static extern void CGContextScaleCTM (IntPtr cgc, double x, double y);
 107                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 108                 internal static extern void CGContextFlush (IntPtr cgc);
 109                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 110                 internal static extern void CGContextSynchronize (IntPtr cgc);
 111         }
 112
 113         internal struct CGSize {
 114                 public float width;
 115                 public float height;
 116         }
 117
 118         internal struct CGPoint {
 119                 public float x;
 120                 public float y;
 121         }
 122
 123         internal struct HIRect {
 124                 public CGPoint origin;
 125                 public CGSize size;
 126         }
 127
 128         internal struct QRect
 129         {
 130                 public short top;
 131                 public short left;
 132                 public short bottom;
 133                 public short right;
 134         }
 135
 136         internal struct CarbonContext
 137         {
 138                 public IntPtr ctx;
 139                 public int width;
 140                 public int height;
 141
 142                 public CarbonContext (IntPtr ctx, int width, int height)
 143                 {
 144                         this.ctx = ctx;
 145                         this.width = width;
 146                         this.height = height;
 147                 }
 148         }
 149 }