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) 2007 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 #undef DEBUG_CLIPPING
  29
  30 using System.Collections;
  31 using System.Reflection;
  32 using System.Runtime.InteropServices;
  33 using System.Security;
  34
  35 namespace System.Drawing {
  36
  37         [SuppressUnmanagedCodeSecurity]
  38 #if NET_2_0
  39         internal static class Carbon {
  40 #else
  41         internal sealed class Carbon {
  42 #endif
  43                 internal static Hashtable contextReference = new Hashtable ();
  44                 internal static object lockobj = new object ();
  45
  46                 internal static Delegate hwnd_delegate;
  47
  48 #if DEBUG_CLIPPING
  49                 internal static float red = 1.0f;
  50                 internal static float green = 0.0f;
  51                 internal static float blue = 0.0f;
  52                 internal static int debug_threshold = 1;
  53 #endif
  54
  55                 static Carbon () {
  56                         foreach (Assembly asm in AppDomain.CurrentDomain.GetAssemblies ()) {
  57                                 if (String.Equals (asm.GetName ().Name, "System.Windows.Forms")) {
  58                                         Type driver_type = asm.GetType ("System.Windows.Forms.XplatUICarbon");
  59                                         if (driver_type != null) {
  60                                                 hwnd_delegate = (Delegate) driver_type.GetField ("HwndDelegate", BindingFlags.NonPublic | BindingFlags.Static).GetValue (null);
  61                                         }
  62                                 }
  63                         }
  64                 }
  65
  66                 internal static CarbonContext GetCGContextForView (IntPtr handle) {
  67                         IntPtr context = IntPtr.Zero;
  68                         IntPtr port = IntPtr.Zero;
  69                         IntPtr window = IntPtr.Zero;
  70
  71                         window = GetControlOwner (handle);
  72
  73                         if (handle == IntPtr.Zero || window == IntPtr.Zero) {
  74                                 // FIXME: Can we actually get a CGContextRef for the desktop?  this makes context IntPtr.Zero
  75                                 port = GetQDGlobalsThePort ();
  76                                 CreateCGContextForPort (port, ref context);
  77
  78                                 Rect desktop_bounds = CGDisplayBounds (CGMainDisplayID ());
  79
  80                                 return new CarbonContext (port, context, (int)desktop_bounds.size.width, (int)desktop_bounds.size.height);
  81                         }
  82
  83                         QDRect window_bounds = new QDRect ();
  84                         Rect view_bounds = new Rect ();
  85
  86                         port = GetWindowPort (window);
  87
  88                         context = GetContext (port);
  89
  90                         GetWindowBounds (window, 32, ref window_bounds);
  91
  92                         HIViewGetBounds (handle, ref view_bounds);
  93
  94                         HIViewConvertRect (ref view_bounds, handle, IntPtr.Zero);
  95
  96                         if (view_bounds.size.height < 0) view_bounds.size.height = 0;
  97                         if (view_bounds.size.width < 0) view_bounds.size.width = 0;
  98
  99                         CGContextTranslateCTM (context, view_bounds.origin.x, (window_bounds.bottom - window_bounds.top) - (view_bounds.origin.y + view_bounds.size.height));
 100
 101                         // Create the original rect path and clip to it
 102                         Rect rc_clip = new Rect (0, 0, view_bounds.size.width, view_bounds.size.height);
 103
 104                         CGContextSaveGState (context);
 105
 106                         Rectangle [] clip_rectangles = (Rectangle []) hwnd_delegate.DynamicInvoke (new object [] {handle});
 107                         if (clip_rectangles != null && clip_rectangles.Length > 0) {
 108                                 int length = clip_rectangles.Length;
 109
 110                                 CGContextBeginPath (context);
 111                                 CGContextAddRect (context, rc_clip);
 112
 113                                 for (int i = 0; i < length; i++) {
 114                                         CGContextAddRect (context, new Rect (clip_rectangles [i].X, view_bounds.size.height - clip_rectangles [i].Y - clip_rectangles [i].Height, clip_rectangles [i].Width, clip_rectangles [i].Height));
 115                                 }
 116                                 CGContextClosePath (context);
 117                                 CGContextEOClip (context);
 118 #if DEBUG_CLIPPING
 119                                 if (clip_rectangles.Length >= debug_threshold) {
 120                                         CGContextSetRGBFillColor (context, red, green, blue, 0.5f);
 121                                         CGContextFillRect (context, rc_clip);
 122                                         CGContextFlush (context);
 123                                         System.Threading.Thread.Sleep (500);
 124                                         if (red == 1.0f) { red = 0.0f; blue = 1.0f; }
 125                                         else if (blue == 1.0f) { blue = 0.0f; green = 1.0f; }
 126                                         else if (green == 1.0f) { green = 0.0f; red = 1.0f; }
 127                                 }
 128 #endif
 129                         } else {
 130                                 CGContextBeginPath (context);
 131                                 CGContextAddRect (context, rc_clip);
 132                                 CGContextClosePath (context);
 133                                 CGContextClip (context);
 134                         }
 135
 136                         return new CarbonContext (port, context, (int)view_bounds.size.width, (int)view_bounds.size.height);
 137                 }
 138
 139                 internal static IntPtr GetContext (IntPtr port) {
 140                         IntPtr context = IntPtr.Zero;
 141
 142                         lock (lockobj) {
 143 #if FALSE
 144                                 if (contextReference [port] != null) {
 145                                         CreateCGContextForPort (port, ref context);
 146                                 } else {
 147                                         QDBeginCGContext (port, ref context);
 148                                         contextReference [port] = context;
 149                                 }
 150 #else
 151                                 CreateCGContextForPort (port, ref context);
 152 #endif
 153                         }
 154
 155                         return context;
 156                 }
 157
 158                 internal static void ReleaseContext (IntPtr port, IntPtr context) {
 159                         CGContextRestoreGState (context);
 160
 161                         lock (lockobj) {
 162 #if FALSE
 163                                 if (contextReference [port] != null && context == (IntPtr) contextReference [port]) {
 164                                         QDEndCGContext (port, ref context);
 165                                         contextReference [port] = null;
 166                                 } else {
 167                                         CFRelease (context);
 168                                 }
 169 #else
 170                                 CFRelease (context);
 171 #endif
 172                         }
 173                 }
 174
 175                 #region Cocoa Methods
 176                 [DllImport("libobjc.dylib")]
 177                 public static extern IntPtr objc_getClass(string className);
 178                 [DllImport("libobjc.dylib")]
 179                 public static extern IntPtr objc_msgSend(IntPtr basePtr, IntPtr selector, string argument);
 180                 [DllImport("libobjc.dylib")]
 181                 public static extern IntPtr objc_msgSend(IntPtr basePtr, IntPtr selector);
 182                 [DllImport("libobjc.dylib")]
 183                 public static extern void objc_msgSend_stret(ref Rect arect, IntPtr basePtr, IntPtr selector);
 184                 [DllImport("libobjc.dylib")]
 185                 public static extern IntPtr sel_registerName(string selectorName);
 186                 #endregion
 187
 188                 [DllImport("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 189                 internal static extern IntPtr CGMainDisplayID ();
 190                 [DllImport("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 191                 internal static extern Rect CGDisplayBounds (IntPtr display);
 192
 193                 [DllImport("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 194                 internal static extern int HIViewGetBounds (IntPtr vHnd, ref Rect r);
 195                 [DllImport("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 196                 internal static extern int HIViewConvertRect (ref Rect r, IntPtr a, IntPtr b);
 197
 198                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 199                 internal static extern IntPtr GetControlOwner (IntPtr aView);
 200
 201                 [DllImport("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 202                 internal static extern int GetWindowBounds (IntPtr wHnd, uint reg, ref QDRect rect);
 203                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 204                 internal static extern IntPtr GetWindowPort (IntPtr hWnd);
 205                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 206                 internal static extern IntPtr GetQDGlobalsThePort ();
 207                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 208                 internal static extern void CreateCGContextForPort (IntPtr port, ref IntPtr context);
 209                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 210                 internal static extern void CFRelease (IntPtr context);
 211                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 212                 internal static extern void QDBeginCGContext (IntPtr port, ref IntPtr context);
 213                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 214                 internal static extern void QDEndCGContext (IntPtr port, ref IntPtr context);
 215                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 216                 internal static extern int CGContextClipToRect (IntPtr context, Rect clip);
 217                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 218                 internal static extern int CGContextClipToRects (IntPtr context, Rect [] clip_rects, int count);
 219                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 220                 internal static extern void CGContextTranslateCTM (IntPtr context, float tx, float ty);
 221                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 222                 internal static extern void CGContextScaleCTM (IntPtr context, float x, float y);
 223                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 224                 internal static extern void CGContextFlush (IntPtr context);
 225                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 226                 internal static extern void CGContextSynchronize (IntPtr context);
 227                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 228                 internal static extern IntPtr CGPathCreateMutable ();
 229                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 230                 internal static extern void CGPathAddRects (IntPtr path, IntPtr _void, Rect [] rects, int count);
 231                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 232                 internal static extern void CGPathAddRect (IntPtr path, IntPtr _void, Rect rect);
 233                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 234                 internal static extern void CGContextAddRects (IntPtr context, Rect [] rects, int count);
 235                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 236                 internal static extern void CGContextAddRect (IntPtr context, Rect rect);
 237                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 238                 internal static extern void CGContextBeginPath (IntPtr context);
 239                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 240                 internal static extern void CGContextClosePath (IntPtr context);
 241                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 242                 internal static extern void CGContextAddPath (IntPtr context, IntPtr path);
 243                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 244                 internal static extern void CGContextClip (IntPtr context);
 245                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 246                 internal static extern void CGContextEOClip (IntPtr context);
 247                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 248                 internal static extern void CGContextEOFillPath (IntPtr context);
 249                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 250                 internal static extern void CGContextSaveGState (IntPtr context);
 251                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 252                 internal static extern void CGContextRestoreGState (IntPtr context);
 253
 254 #if DEBUG_CLIPPING
 255                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 256                 internal static extern void CGContextSetRGBFillColor (IntPtr context, float red, float green, float blue, float alpha);
 257                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 258                 internal static extern void CGContextFillRect (IntPtr context, Rect rect);
 259 #endif
 260         }
 261
 262         internal struct CGSize {
 263                 public float width;
 264                 public float height;
 265         }
 266
 267         internal struct CGPoint {
 268                 public float x;
 269                 public float y;
 270         }
 271
 272         internal struct Rect {
 273                 public Rect (float x, float y, float width, float height) {
 274                         this.origin.x = x;
 275                         this.origin.y = y;
 276                         this.size.width = width;
 277                         this.size.height = height;
 278                 }
 279
 280                 public CGPoint origin;
 281                 public CGSize size;
 282         }
 283
 284         internal struct QDRect
 285         {
 286                 public short top;
 287                 public short left;
 288                 public short bottom;
 289                 public short right;
 290         }
 291
 292         internal struct CarbonContext
 293         {
 294                 public IntPtr port;
 295                 public IntPtr ctx;
 296                 public int width;
 297                 public int height;
 298
 299                 public CarbonContext (IntPtr port, IntPtr ctx, int width, int height)
 300                 {
 301                         this.port = port;
 302                         this.ctx = ctx;
 303                         this.width = width;
 304                         this.height = height;
 305                 }
 306         }
 307 }