mcs/class/Mono.Cairo/Mono.Cairo/Graphics.cs

   1 //
   2 // Mono.Cairo.Graphics.cs
   3 //
   4 // Author:
   5 //   Duncan Mak (duncan@ximian.com)
   6 //   Miguel de Icaza (miguel@novell.com)
   7 //   Hisham Mardam Bey (hisham.mardambey@gmail.com)
   8 //
   9 // (C) Ximian Inc, 2003.
  10 // (C) Novell Inc, 2003.
  11 //
  12 // This is an OO wrapper API for the Cairo API.
  13 //
  14 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  15 //
  16 // Permission is hereby granted, free of charge, to any person obtaining
  17 // a copy of this software and associated documentation files (the
  18 // "Software"), to deal in the Software without restriction, including
  19 // without limitation the rights to use, copy, modify, merge, publish,
  20 // distribute, sublicense, and/or sell copies of the Software, and to
  21 // permit persons to whom the Software is furnished to do so, subject to
  22 // the following conditions:
  23 //
  24 // The above copyright notice and this permission notice shall be
  25 // included in all copies or substantial portions of the Software.
  26 //
  27 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  28 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  29 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  30 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  31 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  32 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  33 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  34 //
  35
  36 using System;
  37 using System.Runtime.InteropServices;
  38 using Cairo;
  39
  40 namespace Cairo {
  41
  42         public class Point
  43         {
  44                 public int X;
  45                 public int Y;
  46
  47                 public Point (int x, int y)
  48                 {
  49                         X = x;
  50                         Y = y;
  51                 }
  52         }
  53
  54         public class PointD
  55         {
  56                 public double X;
  57                 public double Y;
  58
  59                 public PointD (double x, double y)
  60                 {
  61                         X = x;
  62                         Y = y;
  63                 }
  64         }
  65
  66
  67         public class Distance
  68         {
  69                 public double Dx;
  70                 public double Dy;
  71
  72                 public Distance (double x, double y)
  73                 {
  74                         Dx = x;
  75                         Dy = y;
  76                 }
  77         }
  78
  79         public class Color
  80         {
  81                 public double R;
  82                 public double G;
  83                 public double B;
  84                 public double A;
  85
  86                 public Color(double r, double g, double b, double a)
  87                 {
  88                         R = r;
  89                         G = g;
  90                         B = b;
  91                         A = a;
  92                 }
  93         }
  94
  95         public class Graphics : IDisposable
  96         {
  97                 internal IntPtr state = IntPtr.Zero;
  98                 //private Surface surface;
  99
 100                 public Graphics (Surface surface)
 101                 {
 102                         state = CairoAPI.cairo_create (surface.Pointer);
 103                 }
 104
 105                 public Graphics (IntPtr state)
 106                 {
 107                         this.state = state;
 108                 }
 109
 110                 ~Graphics ()
 111                 {
 112                         Dispose (false);
 113                 }
 114
 115                 void IDisposable.Dispose ()
 116                 {
 117                         Dispose (true);
 118                         GC.SuppressFinalize (this);
 119                 }
 120
 121                 protected virtual void Dispose (bool disposing)
 122                 {
 123                         if (!disposing){
 124                                 //Console.WriteLine ("Cairo.Graphics: called from thread");
 125                                 return;
 126                         }
 127
 128                         if (state == IntPtr.Zero)
 129                                 return;
 130
 131                         CairoAPI.cairo_destroy (state);
 132                         state = IntPtr.Zero;
 133                 }
 134
 135                 public Cairo.Graphics Copy ()
 136                 {
 137                         IntPtr dest;
 138                         CairoAPI.cairo_copy (out dest, state);
 139                         return new Cairo.Graphics (dest);
 140                 }
 141
 142                 public void Save ()
 143                 {
 144                         CairoAPI.cairo_save (state);
 145                 }
 146
 147                 public void Restore ()
 148                 {
 149                         CairoAPI.cairo_restore (state);
 150                 }
 151
 152                 public Antialias Antialias {
 153                         get { return CairoAPI.cairo_get_antialias (state); }
 154                         set { CairoAPI.cairo_set_antialias (state, value); }
 155                 }
 156
 157                 public Cairo.Status Status {
 158                         get {
 159                                 return CairoAPI.cairo_status (state);
 160                         }
 161                 }
 162
 163                 /*
 164                 public string StatusString {
 165                  get {
 166                                 return CairoAPI.cairo_status_to_string (state);
 167                         }
 168                  }
 169                  */
 170                 public IntPtr Handle {
 171                         get {
 172                                 return state;
 173                         }
 174                 }
 175
 176                 public Cairo.Operator Operator {
 177                         set {
 178                                 CairoAPI.cairo_set_operator (state, value);
 179                         }
 180
 181                         get {
 182                                 return CairoAPI.cairo_get_operator (state);
 183                         }
 184                 }
 185
 186                 public Cairo.Color Color {
 187                         set {
 188                                 CairoAPI.cairo_set_source_rgba (state, value.R,
 189                                                           value.G, value.B,
 190                                                           value.A);
 191                         }
 192                 }
 193
 194                 public Cairo.Color ColorRgb {
 195                         set {
 196                                 CairoAPI.cairo_set_source_rgb (state, value.R,
 197                                                            value.G, value.B);
 198                         }
 199                 }
 200
 201                 public double Tolerance {
 202                         set {
 203                                 CairoAPI.cairo_set_tolerance (state, value);
 204                         }
 205                 }
 206
 207                 public Cairo.FillRule FillRule {
 208                         set {
 209                                 CairoAPI.cairo_set_fill_rule (state, value);
 210                         }
 211
 212                         get {
 213                                 return CairoAPI.cairo_get_fill_rule (state);
 214                         }
 215                 }
 216
 217                 public double LineWidth {
 218                         set {
 219                                 CairoAPI.cairo_set_line_width (state, value);
 220                         }
 221
 222                         get {
 223                                 return CairoAPI.cairo_get_line_width (state);
 224                         }
 225                 }
 226
 227                 public Cairo.LineCap LineCap {
 228                         set {
 229                                 CairoAPI.cairo_set_line_cap (state, value);
 230                         }
 231
 232                         get {
 233                                 return CairoAPI.cairo_current_line_cap (state);
 234                         }
 235                 }
 236
 237                 public Cairo.LineJoin LineJoin {
 238                         set {
 239                                 CairoAPI.cairo_set_line_join (state, value);
 240                         }
 241
 242                         get {
 243                                 return CairoAPI.cairo_get_line_join (state);
 244                         }
 245                 }
 246
 247                 public void SetDash (double [] dashes, int ndash, double offset)
 248                 {
 249                         CairoAPI.cairo_set_dash (state, dashes, ndash, offset);
 250                 }
 251
 252                 public Pattern Pattern {
 253                         set {
 254                                 CairoAPI.cairo_set_source (state, value.Pointer);
 255                         }
 256
 257                         get {
 258                                 return new Pattern (CairoAPI.cairo_get_source (state));
 259                         }
 260                 }
 261
 262                 public Pattern Source {
 263                         set {
 264                                 CairoAPI.cairo_set_source (state, value.Pointer);
 265                         }
 266
 267                         get {
 268                                 return new Pattern (CairoAPI.cairo_get_source (state));
 269                         }
 270                 }
 271
 272                 public double MiterLimit {
 273                         set {
 274                                 CairoAPI.cairo_set_miter_limit (state, value);
 275                         }
 276
 277                         get {
 278                                 return CairoAPI.cairo_get_miter_limit (state);
 279                         }
 280                 }
 281
 282                 public PointD CurrentPoint {
 283                         get {
 284                                 double x, y;
 285                                 CairoAPI.cairo_get_current_point (state, out x, out y);
 286                                 return new PointD (x, y);
 287                         }
 288                 }
 289
 290                 public Cairo.Surface TargetSurface {
 291                         set {
 292                                 state = CairoAPI.cairo_create (value.Pointer);
 293                                 //CairoAPI.cairo_set_target_surface (state, value.Handle);
 294                         }
 295
 296                         get {
 297                                 return Cairo.Surface.LookupExternalSurface (
 298                                         CairoAPI.cairo_get_target (state));
 299                         }
 300                 }
 301
 302 #region Path methods
 303
 304                 public void NewPath ()
 305                 {
 306                         CairoAPI.cairo_new_path (state);
 307                 }
 308
 309                 public void CurrentPath (MoveToCallback move_to,
 310                                          LineToCallback line_to,
 311                                          CurveToCallback curve_to,
 312                                          ClosePathCallback close_path,
 313                                          object closure)
 314                 {
 315
 316                 }
 317
 318                 public void MoveTo (PointD p)
 319                 {
 320                                                 MoveTo (p.X, p.Y);
 321                 }
 322
 323                                 public void MoveTo (double x, double y)
 324                                 {
 325                         CairoAPI.cairo_move_to (state, x, y);
 326                                 }
 327
 328                 public void LineTo (PointD p)
 329                                 {
 330                                                 LineTo (p.X, p.Y);
 331                                 }
 332
 333                                 public void LineTo (double x, double y)
 334                 {
 335                         CairoAPI.cairo_line_to (state, x, y);
 336                 }
 337
 338                 public void CurveTo (PointD p1, PointD p2, PointD p3)
 339                                 {
 340                                                 CurveTo (p1.X, p1.Y, p2.X, p2.Y, p3.X, p3.Y);
 341                                 }
 342
 343                 public void CurveTo (double x1, double y1, double x2, double y2, double x3, double y3)
 344                 {
 345                         CairoAPI.cairo_curve_to (state, x1, y1, x2, y2, x3, y3);
 346                 }
 347
 348                 public void RelMoveTo (PointD p)
 349                                 {
 350                                                 RelMoveTo (p.X, p.Y);
 351                                 }
 352
 353                 public void RelMoveTo (double x, double y)
 354                 {
 355                         CairoAPI.cairo_rel_move_to (state, x, y);
 356                 }
 357
 358                 public void RelLineTo (PointD p)
 359                 {
 360                                                 RelLineTo (p.X, p.Y);
 361                 }
 362
 363                 public void RelLineTo (double x, double y)
 364                                 {
 365                         CairoAPI.cairo_rel_line_to (state, x, y);
 366                                 }
 367
 368                 public void RelCurveTo (double dx1, double dy1, double dx2, double dy2, double dx3, double dy3)
 369                 {
 370                         CairoAPI.cairo_rel_curve_to (state, dx1, dy1, dx2, dy2, dx3, dy3);
 371                 }
 372
 373                 public void Arc (double xc, double yc, double radius, double angel1, double angel2)
 374                 {
 375                         CairoAPI.cairo_arc (state, xc, yc, radius, angel1, angel2);
 376                 }
 377
 378                 public void ArcNegative (double xc, double yc, double radius, double angel1, double angel2)
 379                 {
 380                         CairoAPI.cairo_arc_negative (state, xc, yc, radius, angel1, angel2);
 381                 }
 382
 383                 public void ArcTo (PointD p1, PointD p2, double radius)
 384                 {
 385                                 ArcTo (p1.X, p1.Y, p2.X, p2.Y, radius);
 386                 }
 387
 388                 public void ArcTo (double x1, double y1, double x2, double y2, double radius)
 389                 {
 390                         CairoAPI.cairo_arc_to (state, x1, y1, x2, y2, radius);
 391                 }
 392
 393                 public void Rectangle (PointD p, double width, double height)
 394                                 {
 395                                                 Rectangle (p.X, p.Y, width, height);
 396                                 }
 397
 398                 public void Rectangle (double x, double y, double width, double height)
 399                 {
 400                         CairoAPI.cairo_rectangle (state, x, y, width, height);
 401                 }
 402
 403                 public void ClosePath ()
 404                 {
 405                         CairoAPI.cairo_close_path (state);
 406                 }
 407 #endregion
 408
 409 #region Painting Methods
 410
 411                 public void Stroke ()
 412                 {
 413                         CairoAPI.cairo_stroke (state);
 414                 }
 415
 416                 public void StrokePreserve ()
 417                 {
 418                         CairoAPI.cairo_stroke_preserve (state);
 419                 }
 420
 421                 public void Fill ()
 422                 {
 423                         CairoAPI.cairo_fill (state);
 424                 }
 425
 426                 public void FillPreserve ()
 427                 {
 428                         CairoAPI.cairo_fill_preserve (state);
 429                 }
 430
 431 #endregion
 432
 433                 public void Clip ()
 434                 {
 435                         CairoAPI.cairo_clip (state);
 436                 }
 437
 438                 public void ClipReset ()
 439                 {
 440                         CairoAPI.cairo_reset_clip (state);
 441                 }
 442
 443                 public bool InStroke (double x, double y)
 444                 {
 445                         return CairoAPI.cairo_in_stroke (state, x, y);
 446                 }
 447
 448                 public bool InFill (double x, double y)
 449                 {
 450                         return CairoAPI.cairo_in_fill (state, x, y);
 451                 }
 452
 453
 454 #region Modified state
 455
 456                 public void SetTargetImage (
 457                         string data, Cairo.Format format, int width, int height, int stride)
 458                 {
 459                         CairoAPI.cairo_image_surface_create_for_data (data, format, width, height, stride);
 460                 }
 461
 462                 public void SetTargetDrawable (IntPtr dpy, IntPtr drawable, IntPtr visual, int width, int height)
 463                 {
 464                         CairoAPI.cairo_xlib_surface_create (dpy, drawable, visual, width, height);
 465                 }
 466 #endregion
 467
 468                 public void Rotate (double angle)
 469                 {
 470                         CairoAPI.cairo_rotate (state, angle);
 471                 }
 472
 473                 public void Scale (double sx, double sy)
 474                 {
 475                         CairoAPI.cairo_scale (state, sx, sy);
 476                 }
 477
 478                 public void Translate (double tx, double ty)
 479                 {
 480                         CairoAPI.cairo_translate (state, tx, ty);
 481                 }
 482
 483                 public PointD TransformPoint
 484                 {
 485                         get {
 486                                 double x; double y;
 487                                 CairoAPI.cairo_user_to_device (state, out x, out y);
 488                                 return new PointD(x, y);
 489                         }
 490                 }
 491
 492                 public Distance TransformDistance
 493                 {
 494                         get {
 495                                 double dx; double dy;
 496                                 CairoAPI.cairo_user_to_device_distance (state, out dx, out dy);
 497                                 return new Distance(dx, dy);
 498                         }
 499                 }
 500
 501                 public PointD InverseTransformPoint
 502                 {
 503                         get {
 504                                 double x; double y;
 505                                 CairoAPI.cairo_device_to_user (state, out x, out y);
 506                                 return new PointD (x, y);
 507                         }
 508                 }
 509
 510                 public Distance InverseTransformDistance
 511                 {
 512                         get {
 513                                 double dx; double dy;
 514                                 CairoAPI.cairo_device_to_user_distance (state, out dx, out dy);
 515                                 return new Distance (dx, dy);
 516                         }
 517                 }
 518
 519                 public Cairo.Matrix Matrix {
 520                         set {
 521                                 CairoAPI.cairo_set_matrix (state, value.Pointer);
 522                         }
 523
 524                         get {
 525                                 Matrix_T m = new Matrix_T ();
 526                                 CairoAPI.cairo_get_matrix (state, m);
 527                                 return new Matrix (m);
 528                         }
 529                 }
 530                 /*
 531                 public Font Font {
 532                         set {
 533                                 CairoAPI.cairo_set_font (state, value.Pointer);
 534
 535                         }
 536
 537                         get {
 538                                 IntPtr fnt = IntPtr.Zero;
 539
 540                                 fnt = CairoAPI.cairo_current_font (state);
 541
 542                                 return new Font (fnt);
 543                         }
 544                 }
 545                  */
 546
 547                 public void FontSetSize (double size)
 548                 {
 549                         CairoAPI.cairo_set_font_size (state, size);
 550                 }
 551
 552                 public void FontSetMatrix (Matrix m)
 553                 {
 554                         CairoAPI.cairo_set_font_matrix (state, m.Pointer);
 555                 }
 556
 557                 /*
 558                 public void TransformFont (Matrix matrix)
 559                 {
 560                         CairoAPI.cairo_transform_font (state, matrix.Pointer);
 561                 }
 562                  */
 563
 564
 565                 static internal IntPtr FromGlyphToUnManagedMemory(Glyph [] glyphs)
 566                 {
 567                         int size =  Marshal.SizeOf (glyphs[0]);
 568                         IntPtr dest = Marshal.AllocHGlobal (size * glyphs.Length);
 569                         int pos = dest.ToInt32();
 570
 571                         for (int i=0; i < glyphs.Length; i++, pos += size)
 572                                 Marshal.StructureToPtr (glyphs[i], (IntPtr)pos, false);
 573
 574                         return dest;
 575                 }
 576
 577
 578                 public void ShowGlyphs (Matrix matrix, Glyph[] glyphs)
 579                 {
 580
 581                         IntPtr ptr;
 582
 583                         ptr = FromGlyphToUnManagedMemory (glyphs);
 584
 585                         CairoAPI.cairo_show_glyphs (state, ptr, glyphs.Length);
 586
 587                         Marshal.FreeHGlobal (ptr);
 588
 589                 }
 590
 591                 public void GlyphPath (Matrix matrix, Glyph[] glyphs)
 592                 {
 593
 594                         IntPtr ptr;
 595
 596                         ptr = FromGlyphToUnManagedMemory (glyphs);
 597
 598                         CairoAPI.cairo_glyph_path (state, ptr, glyphs.Length);
 599
 600                         Marshal.FreeHGlobal (ptr);
 601
 602                 }
 603
 604                 public FontExtents FontExtents {
 605                         get {
 606
 607                                 FontExtents f_extents = new FontExtents();
 608                                 CairoAPI.cairo_font_extents (state, ref f_extents);
 609                                 return f_extents;
 610                         }
 611                 }
 612
 613                 public void FontFace (string family, FontSlant s, FontWeight w)
 614                 {
 615                         CairoAPI.cairo_select_font_face (state, family, s, w);
 616                 }
 617
 618                 public double FontSize {
 619                         set { CairoAPI.cairo_set_font_size (state, value); }
 620                 }
 621
 622                 public void ShowText (string str)
 623                 {
 624                         CairoAPI.cairo_show_text (state, str);
 625                 }
 626
 627                 public void TextPath (string str)
 628                 {
 629                         CairoAPI.cairo_text_path  (state, str);
 630                 }
 631         }
 632 }