mcs/class/System.Drawing/System.Drawing/macFunctions.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 MacSupport {
  40 #else
  41         internal sealed class MacSupport {
  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 MacSupport () {
  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 CocoaContext GetCGContextForNSView (IntPtr handle) {
  67                         IntPtr graphicsContext = objc_msgSend (objc_getClass ("NSGraphicsContext"), sel_registerName ("currentContext"));
  68                         IntPtr ctx = objc_msgSend (graphicsContext, sel_registerName ("graphicsPort"));
  69                         Rect bounds = new Rect ();
  70
  71                         objc_msgSend_stret (ref bounds, handle, sel_registerName ("bounds"));
  72
  73                         var isFlipped = bool_objc_msgSend (handle, sel_registerName ("isFlipped"));
  74                         if (isFlipped) {
  75                                 CGContextSaveGState (ctx);
  76                                 CGContextTranslateCTM (ctx, bounds.origin.x, bounds.size.height);
  77                                 CGContextScaleCTM (ctx,1.0f,-1.0f);
  78                         }
  79
  80                         return new CocoaContext (ctx, (int) bounds.size.width, (int) bounds.size.height);
  81                 }
  82
  83                 internal static CarbonContext GetCGContextForView (IntPtr handle) {
  84                         IntPtr context = IntPtr.Zero;
  85                         IntPtr port = IntPtr.Zero;
  86                         IntPtr window = IntPtr.Zero;
  87
  88                         window = GetControlOwner (handle);
  89
  90                         if (handle == IntPtr.Zero || window == IntPtr.Zero) {
  91                                 // FIXME: Can we actually get a CGContextRef for the desktop?  this makes context IntPtr.Zero
  92                                 port = GetQDGlobalsThePort ();
  93                                 CreateCGContextForPort (port, ref context);
  94
  95                                 Rect desktop_bounds = CGDisplayBounds (CGMainDisplayID ());
  96
  97                                 return new CarbonContext (port, context, (int)desktop_bounds.size.width, (int)desktop_bounds.size.height);
  98                         }
  99
 100                         QDRect window_bounds = new QDRect ();
 101                         Rect view_bounds = new Rect ();
 102
 103                         port = GetWindowPort (window);
 104
 105                         context = GetContext (port);
 106
 107                         GetWindowBounds (window, 32, ref window_bounds);
 108
 109                         HIViewGetBounds (handle, ref view_bounds);
 110
 111                         HIViewConvertRect (ref view_bounds, handle, IntPtr.Zero);
 112
 113                         if (view_bounds.size.height < 0) view_bounds.size.height = 0;
 114                         if (view_bounds.size.width < 0) view_bounds.size.width = 0;
 115
 116                         CGContextTranslateCTM (context, view_bounds.origin.x, (window_bounds.bottom - window_bounds.top) - (view_bounds.origin.y + view_bounds.size.height));
 117
 118                         // Create the original rect path and clip to it
 119                         Rect rc_clip = new Rect (0, 0, view_bounds.size.width, view_bounds.size.height);
 120
 121                         CGContextSaveGState (context);
 122
 123                         Rectangle [] clip_rectangles = (Rectangle []) hwnd_delegate.DynamicInvoke (new object [] {handle});
 124                         if (clip_rectangles != null && clip_rectangles.Length > 0) {
 125                                 int length = clip_rectangles.Length;
 126
 127                                 CGContextBeginPath (context);
 128                                 CGContextAddRect (context, rc_clip);
 129
 130                                 for (int i = 0; i < length; i++) {
 131                                         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));
 132                                 }
 133                                 CGContextClosePath (context);
 134                                 CGContextEOClip (context);
 135 #if DEBUG_CLIPPING
 136                                 if (clip_rectangles.Length >= debug_threshold) {
 137                                         CGContextSetRGBFillColor (context, red, green, blue, 0.5f);
 138                                         CGContextFillRect (context, rc_clip);
 139                                         CGContextFlush (context);
 140                                         System.Threading.Thread.Sleep (500);
 141                                         if (red == 1.0f) { red = 0.0f; blue = 1.0f; }
 142                                         else if (blue == 1.0f) { blue = 0.0f; green = 1.0f; }
 143                                         else if (green == 1.0f) { green = 0.0f; red = 1.0f; }
 144                                 }
 145 #endif
 146                         } else {
 147                                 CGContextBeginPath (context);
 148                                 CGContextAddRect (context, rc_clip);
 149                                 CGContextClosePath (context);
 150                                 CGContextClip (context);
 151                         }
 152
 153                         return new CarbonContext (port, context, (int)view_bounds.size.width, (int)view_bounds.size.height);
 154                 }
 155
 156                 internal static IntPtr GetContext (IntPtr port) {
 157                         IntPtr context = IntPtr.Zero;
 158
 159                         lock (lockobj) {
 160 #if FALSE
 161                                 if (contextReference [port] != null) {
 162                                         CreateCGContextForPort (port, ref context);
 163                                 } else {
 164                                         QDBeginCGContext (port, ref context);
 165                                         contextReference [port] = context;
 166                                 }
 167 #else
 168                                 CreateCGContextForPort (port, ref context);
 169 #endif
 170                         }
 171
 172                         return context;
 173                 }
 174
 175                 internal static void ReleaseContext (IntPtr port, IntPtr context) {
 176                         CGContextRestoreGState (context);
 177
 178                         lock (lockobj) {
 179 #if FALSE
 180                                 if (contextReference [port] != null && context == (IntPtr) contextReference [port]) {
 181                                         QDEndCGContext (port, ref context);
 182                                         contextReference [port] = null;
 183                                 } else {
 184                                         CFRelease (context);
 185                                 }
 186 #else
 187                                 CFRelease (context);
 188 #endif
 189                         }
 190                 }
 191
 192                 #region Cocoa Methods
 193                 [DllImport("libobjc.dylib")]
 194                 public static extern IntPtr objc_getClass(string className);
 195                 [DllImport("libobjc.dylib")]
 196                 public static extern IntPtr objc_msgSend(IntPtr basePtr, IntPtr selector, string argument);
 197                 [DllImport("libobjc.dylib")]
 198                 public static extern IntPtr objc_msgSend(IntPtr basePtr, IntPtr selector);
 199                 [DllImport("libobjc.dylib")]
 200                 public static extern void objc_msgSend_stret(ref Rect arect, IntPtr basePtr, IntPtr selector);
 201                 [DllImport ("libobjc.dylib", EntryPoint = "objc_msgSend")]
 202                 public static extern bool bool_objc_msgSend (IntPtr handle, IntPtr selector);
 203                 [DllImport("libobjc.dylib")]
 204                 public static extern IntPtr sel_registerName(string selectorName);
 205                 #endregion
 206
 207                 [DllImport("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 208                 internal static extern IntPtr CGMainDisplayID ();
 209                 [DllImport("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 210                 internal static extern Rect CGDisplayBounds (IntPtr display);
 211
 212                 [DllImport("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 213                 internal static extern int HIViewGetBounds (IntPtr vHnd, ref Rect r);
 214                 [DllImport("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 215                 internal static extern int HIViewConvertRect (ref Rect r, IntPtr a, IntPtr b);
 216
 217                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 218                 internal static extern IntPtr GetControlOwner (IntPtr aView);
 219
 220                 [DllImport("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 221                 internal static extern int GetWindowBounds (IntPtr wHnd, uint reg, ref QDRect rect);
 222                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 223                 internal static extern IntPtr GetWindowPort (IntPtr hWnd);
 224                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 225                 internal static extern IntPtr GetQDGlobalsThePort ();
 226                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 227                 internal static extern void CreateCGContextForPort (IntPtr port, ref IntPtr context);
 228                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 229                 internal static extern void CFRelease (IntPtr context);
 230                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 231                 internal static extern void QDBeginCGContext (IntPtr port, ref IntPtr context);
 232                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 233                 internal static extern void QDEndCGContext (IntPtr port, ref IntPtr context);
 234                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 235                 internal static extern int CGContextClipToRect (IntPtr context, Rect clip);
 236                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 237                 internal static extern int CGContextClipToRects (IntPtr context, Rect [] clip_rects, int count);
 238                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 239                 internal static extern void CGContextTranslateCTM (IntPtr context, float tx, float ty);
 240                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 241                 internal static extern void CGContextScaleCTM (IntPtr context, float x, float y);
 242                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 243                 internal static extern void CGContextFlush (IntPtr context);
 244                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 245                 internal static extern void CGContextSynchronize (IntPtr context);
 246                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 247                 internal static extern IntPtr CGPathCreateMutable ();
 248                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 249                 internal static extern void CGPathAddRects (IntPtr path, IntPtr _void, Rect [] rects, int count);
 250                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 251                 internal static extern void CGPathAddRect (IntPtr path, IntPtr _void, Rect rect);
 252                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 253                 internal static extern void CGContextAddRects (IntPtr context, Rect [] rects, int count);
 254                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 255                 internal static extern void CGContextAddRect (IntPtr context, Rect rect);
 256                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 257                 internal static extern void CGContextBeginPath (IntPtr context);
 258                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 259                 internal static extern void CGContextClosePath (IntPtr context);
 260                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 261                 internal static extern void CGContextAddPath (IntPtr context, IntPtr path);
 262                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 263                 internal static extern void CGContextClip (IntPtr context);
 264                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 265                 internal static extern void CGContextEOClip (IntPtr context);
 266                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 267                 internal static extern void CGContextEOFillPath (IntPtr context);
 268                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 269                 internal static extern void CGContextSaveGState (IntPtr context);
 270                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 271                 internal static extern void CGContextRestoreGState (IntPtr context);
 272
 273 #if DEBUG_CLIPPING
 274                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 275                 internal static extern void CGContextSetRGBFillColor (IntPtr context, float red, float green, float blue, float alpha);
 276                 [DllImport ("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")]
 277                 internal static extern void CGContextFillRect (IntPtr context, Rect rect);
 278 #endif
 279         }
 280
 281         internal struct CGSize {
 282                 public float width;
 283                 public float height;
 284         }
 285
 286         internal struct CGPoint {
 287                 public float x;
 288                 public float y;
 289         }
 290
 291         internal struct Rect {
 292                 public Rect (float x, float y, float width, float height) {
 293                         this.origin.x = x;
 294                         this.origin.y = y;
 295                         this.size.width = width;
 296                         this.size.height = height;
 297                 }
 298
 299                 public CGPoint origin;
 300                 public CGSize size;
 301         }
 302
 303         internal struct QDRect
 304         {
 305                 public short top;
 306                 public short left;
 307                 public short bottom;
 308                 public short right;
 309         }
 310
 311         internal struct CarbonContext : IMacContext
 312         {
 313                 public IntPtr port;
 314                 public IntPtr ctx;
 315                 public int width;
 316                 public int height;
 317
 318                 public CarbonContext (IntPtr port, IntPtr ctx, int width, int height)
 319                 {
 320                         this.port = port;
 321                         this.ctx = ctx;
 322                         this.width = width;
 323                         this.height = height;
 324                 }
 325
 326                 public void Synchronize ()
 327                 {
 328                         MacSupport.CGContextSynchronize (ctx);
 329                 }
 330
 331                 public void Release ()
 332                 {
 333                         MacSupport.ReleaseContext (port, ctx);
 334                 }
 335         }
 336
 337         internal struct CocoaContext : IMacContext
 338         {
 339                 public IntPtr ctx;
 340                 public int width;
 341                 public int height;
 342
 343                 public CocoaContext (IntPtr ctx, int width, int height)
 344                 {
 345                         this.ctx = ctx;
 346                         this.width = width;
 347                         this.height = height;
 348                 }
 349
 350                 public void Synchronize ()
 351                 {
 352                         MacSupport.CGContextSynchronize (ctx);
 353                 }
 354
 355                 public void Release ()
 356                 {
 357                         MacSupport.CGContextRestoreGState(ctx);
 358                 }
 359         }
 360
 361         internal interface IMacContext
 362         {
 363                 void Synchronize ();
 364                 void Release ();
 365         }
 366 }