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 GetCGContextForView (IntPtr hwnd) {
  35                         IntPtr cgContext = IntPtr.Zero;
  36                         // Grab the window we're in
  37                         IntPtr window = Carbon.GetControlOwner (hwnd);
  38                         // Get the port of the window
  39                         IntPtr port = Carbon.GetWindowPort (window);
  40                         // Create a CGContext ref
  41                         Carbon.CreateCGContextForPort (port, ref cgContext);
  42
  43                         // Get the bounds of the window
  44                         QRect wBounds = new QRect ();
  45                         Carbon.GetWindowBounds (window, 32, ref wBounds);
  46
  47                         // Get the bounds of the view
  48                         HIRect vBounds = new HIRect ();
  49                         Carbon.HIViewGetBounds (hwnd, ref vBounds);
  50
  51                         // Convert the view local bounds to window coordinates
  52                         Carbon.HIViewConvertRect (ref vBounds, hwnd, IntPtr.Zero);
  53                         Carbon.CGContextTranslateCTM (cgContext, vBounds.origin.x, (wBounds.bottom-wBounds.top)-(vBounds.origin.y+vBounds.size.height));
  54                         /* FIXME: Do we need this or is it inherintly clipped */
  55                         HIRect rcClip = new HIRect ();
  56                         rcClip.origin.x = 0;
  57                         rcClip.origin.y = 0;
  58                         rcClip.size.width = vBounds.size.width;
  59                         rcClip.size.height = vBounds.size.height;
  60                         Carbon.CGContextClipToRect (cgContext, rcClip);
  61                         return new CarbonContext (cgContext, (int)vBounds.size.width, (int)vBounds.size.height);
  62                 }
  63                 [DllImport("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
  64                 internal static extern int HIViewGetBounds (IntPtr vHnd, ref HIRect r);
  65                 [DllImport("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
  66                 internal static extern int HIViewConvertRect (ref HIRect r, IntPtr a, IntPtr b);
  67
  68                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
  69                 internal static extern IntPtr GetControlOwner (IntPtr aView);
  70
  71                 [DllImport("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
  72                 internal static extern int GetWindowBounds (IntPtr wHnd, uint reg, ref QRect rect);
  73                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
  74                 internal static extern IntPtr GetWindowPort (IntPtr hWnd);
  75                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
  76                 internal static extern int CGContextClipToRect (IntPtr cgContext, HIRect clip);
  77                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
  78                 internal static extern void CreateCGContextForPort (IntPtr port, ref IntPtr cgc);
  79                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
  80                 internal static extern void CGContextTranslateCTM (IntPtr cgc, double tx, double ty);
  81                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
  82                 internal static extern void CGContextScaleCTM (IntPtr cgc, double x, double y);
  83                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
  84                 internal static extern void CGContextFlush (IntPtr cgc);
  85                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
  86                 internal static extern void CGContextSynchronize (IntPtr cgc);
  87         }
  88
  89         internal struct CGSize {
  90                 public float width;
  91                 public float height;
  92         }
  93
  94         internal struct CGPoint {
  95                 public float x;
  96                 public float y;
  97         }
  98
  99         internal struct HIRect {
 100                 public CGPoint origin;
 101                 public CGSize size;
 102         }
 103
 104         internal struct QRect
 105         {
 106                 public short top;
 107                 public short left;
 108                 public short bottom;
 109                 public short right;
 110         }
 111
 112         internal struct CarbonContext
 113         {
 114                 public IntPtr ctx;
 115                 public int width;
 116                 public int height;
 117
 118                 public CarbonContext (IntPtr ctx, int width, int height)
 119                 {
 120                         this.ctx = ctx;
 121                         this.width = width;
 122                         this.height = height;
 123                 }
 124         }
 125 }