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

   1 //
   2 // Mono.Cairo.Cairo.cs
   3 //
   4 // Authors: Duncan Mak (duncan@ximian.com)
   5 //          Hisham Mardam Bey (hisham.mardambey@gmail.com)
   6 //
   7 // (C) Ximian, Inc. 2003
   8 //
   9 // This is a simplistic binding of the Cairo API to C#. All functions
  10 // in cairo.h are transcribed into their C# equivelants and all
  11 // enumerations are also listed here.
  12 //
  13 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  14 //
  15 // Permission is hereby granted, free of charge, to any person obtaining
  16 // a copy of this software and associated documentation files (the
  17 // "Software"), to deal in the Software without restriction, including
  18 // without limitation the rights to use, copy, modify, merge, publish,
  19 // distribute, sublicense, and/or sell copies of the Software, and to
  20 // permit persons to whom the Software is furnished to do so, subject to
  21 // the following conditions:
  22 //
  23 // The above copyright notice and this permission notice shall be
  24 // included in all copies or substantial portions of the Software.
  25 //
  26 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  27 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  28 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  29 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  30 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  31 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  32 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  33 //
  34
  35 using System;
  36 using System.Drawing;
  37 using System.Runtime.InteropServices;
  38
  39 namespace Cairo {
  40
  41         public class CairoAPI
  42         {
  43                 internal const string CairoImp = "cairo";
  44
  45                 //
  46                 // Manipulating state objects
  47                 //
  48                 [DllImport (CairoImp)]
  49                 public static extern IntPtr cairo_create (IntPtr target);
  50
  51                 [DllImport (CairoImp)]
  52                 public static extern void cairo_reference (IntPtr cr);
  53
  54                 [DllImport (CairoImp)]
  55                 public static extern void cairo_destroy (IntPtr cr);
  56
  57                 [DllImport (CairoImp)]
  58                 public static extern void cairo_save (IntPtr cr);
  59
  60                 [DllImport (CairoImp)]
  61                 public static extern void cairo_restore (IntPtr cr);
  62
  63                 [DllImport (CairoImp)]
  64                 public static extern void cairo_copy (out IntPtr dest, IntPtr src);
  65
  66                 //
  67                 // Modify state
  68                 //
  69                 [DllImport (CairoImp)]
  70                 public static extern IntPtr cairo_image_surface_create_for_data (
  71                         IntPtr data, Cairo.Format format, int width, int height, int stride);
  72
  73                 [DllImport (CairoImp)]
  74                 public static extern void cairo_set_operator (IntPtr cr, Cairo.Operator op);
  75
  76                 [DllImport (CairoImp)]
  77                 public static extern void cairo_set_source_rgba (IntPtr cr, double red, double green, double blue, double alpha);
  78
  79                 [DllImport (CairoImp)]
  80                 public static extern void cairo_set_source_rgb (IntPtr cr, double red, double green, double blue);
  81
  82                 [DllImport (CairoImp)]
  83                 public static extern void cairo_set_source (IntPtr cr, IntPtr pattern);
  84
  85                 [DllImport (CairoImp)]
  86                 public static extern IntPtr cairo_get_source (IntPtr cr);
  87
  88                 [DllImport (CairoImp)]
  89                 public static extern void cairo_set_tolerance (IntPtr cr, double tolerance);
  90
  91                 [DllImport (CairoImp)]
  92                 public static extern void cairo_set_fill_rule (IntPtr cr, Cairo.FillRule fill_rule);
  93
  94                 [DllImport (CairoImp)]
  95                 public static extern void cairo_set_line_width (IntPtr cr, double width);
  96
  97                 [DllImport (CairoImp)]
  98                 public static extern void cairo_set_line_cap (IntPtr cr, Cairo.LineCap line_cap);
  99
 100                 [DllImport (CairoImp)]
 101                 public static extern void cairo_set_line_join (IntPtr cr, Cairo.LineJoin line_join);
 102
 103                 [DllImport (CairoImp)]
 104                 public static extern void cairo_set_dash (IntPtr cr, double [] dashes, int ndash, double offset);
 105
 106                 [DllImport (CairoImp)]
 107                 public static extern void cairo_set_miter_limit (IntPtr cr, double limit);
 108
 109                 [DllImport (CairoImp)]
 110                 public static extern void cairo_translate (IntPtr cr, double tx, double ty);
 111
 112                 [DllImport (CairoImp)]
 113                 public static extern void cairo_scale (IntPtr cr, double sx, double sy);
 114
 115                 [DllImport (CairoImp)]
 116                 public static extern void cairo_rotate (IntPtr cr, double angle);
 117
 118                 [DllImport (CairoImp)]
 119                 public static extern void cairo_transform (IntPtr cr, out Matrix_T matrix);
 120
 121                 [DllImport (CairoImp)]
 122                 public static extern void cairo_set_matrix (IntPtr cr, Matrix_T matrix);
 123
 124                 [DllImport (CairoImp)]
 125                 public static extern void cairo_identity_matrix (IntPtr cr);
 126
 127                 [DllImport (CairoImp)]
 128                 public static extern void cairo_user_to_device (IntPtr cr, out double x, out double y);
 129
 130                 [DllImport (CairoImp)]
 131                 public static extern void cairo_user_to_device_distance (IntPtr cr, out double dx, out double dy);
 132
 133                 [DllImport (CairoImp)]
 134                 public static extern void cairo_device_to_user (IntPtr cr, out double x, out double y);
 135
 136                 [DllImport (CairoImp)]
 137                 public static extern void cairo_device_to_user_distance (IntPtr cr, out double dx, out double dy);
 138
 139                 //
 140                 // Path creation
 141                 //
 142                 [DllImport (CairoImp)]
 143                 public static extern void cairo_new_path (IntPtr cr);
 144
 145                 public  delegate void MoveToCallback (object closure, PointD p);
 146                 internal delegate void MoveToCallbackPriv (IntPtr closure,
 147                                                           double x, double y);
 148
 149                 public  delegate void LineToCallback (object closure, PointD p);
 150                 internal delegate void LineToCallbackPriv (IntPtr closure,
 151                                                           double x, double y);
 152
 153                 public  delegate void CurveToCallback (object closure, PointD p1, PointD p2, PointD p3);
 154                 internal delegate void CurveToCallbaclPriv (IntPtr closure,
 155                                                            double x1, double y1,
 156                                                            double x2, double y2,
 157                                                            double x3, double y3);
 158
 159                 public  delegate void ClosePathCallback (object closure);
 160                 internal delegate void ClosePathCallbackPriv (IntPtr closure);
 161
 162                 [DllImport (CairoImp)]
 163                 internal static extern void cairo_current_path (IntPtr cr,
 164                                                                 MoveToCallbackPriv move_to,
 165                                                                 LineToCallbackPriv line_to,
 166                                                                 CurveToCallbaclPriv curve_to,
 167                                                                 ClosePathCallbackPriv close_path,
 168                                                                 IntPtr closure);
 169
 170                 [DllImport (CairoImp)]
 171                 public static extern void cairo_move_to (IntPtr cr, double x, double y);
 172
 173                 [DllImport (CairoImp)]
 174                 public static extern void cairo_line_to (IntPtr cr, double x, double y);
 175
 176                 [DllImport (CairoImp)]
 177                 public static extern void cairo_curve_to (
 178                         IntPtr cr, double x1, double y1, double x2, double y2, double x3, double y3);
 179
 180                 [DllImport (CairoImp)]
 181                 public static extern void cairo_arc (
 182                         IntPtr cr, double xc, double yc, double radius, double angel1, double angel2);
 183
 184                 [DllImport (CairoImp)]
 185                 public static extern void cairo_arc_negative (
 186                         IntPtr cr, double xc, double yc, double radius, double angel1, double angel2);
 187
 188                 [DllImport (CairoImp)]
 189                 public static extern void cairo_arc_to (
 190                         IntPtr cr, double x1, double y1, double x2, double y2, double radius);
 191
 192                 [DllImport (CairoImp)]
 193                 public static extern void cairo_rel_move_to (IntPtr cr, double dx, double dy);
 194
 195                 [DllImport (CairoImp)]
 196                 public static extern void cairo_rel_line_to (IntPtr cr, double dx, double dy);
 197
 198                 [DllImport (CairoImp)]
 199                 public static extern void cairo_rel_curve_to (
 200                         IntPtr cr, double dx1, double dy1, double dx2, double dy2, double dx3, double dy3);
 201
 202                 [DllImport (CairoImp)]
 203                 public static extern void cairo_rectangle (IntPtr cr, double x, double y, double width, double height);
 204
 205                 [DllImport (CairoImp)]
 206                 public static extern void cairo_close_path (IntPtr cr);
 207
 208                 //
 209                 // Painting
 210                 //
 211                 [DllImport (CairoImp)]
 212                 public static extern void cairo_stroke (IntPtr cr);
 213
 214                 [DllImport (CairoImp)]
 215                 public static extern void cairo_stroke_preserve (IntPtr cr);
 216
 217                 [DllImport (CairoImp)]
 218                 public static extern void cairo_fill (IntPtr cr);
 219
 220                 [DllImport (CairoImp)]
 221                 public static extern void cairo_fill_preserve (IntPtr cr);
 222
 223                 [DllImport (CairoImp)]
 224                 public static extern void cairo_copy_page (IntPtr cr);
 225
 226                 [DllImport (CairoImp)]
 227                 public static extern void cairo_show_page (IntPtr cr);
 228
 229                 [DllImport (CairoImp)]
 230                 public static extern void cairo_clip (IntPtr cr);
 231
 232                 [DllImport (CairoImp)]
 233                 public static extern void cairo_reset_clip (IntPtr cr);
 234
 235                 //
 236                 // Font / Text
 237                 //
 238                 [DllImport (CairoImp)]
 239                 public static extern void cairo_select_font_face (IntPtr cr,
 240                                                               string family,
 241                                                               FontSlant slant,
 242                                                               FontWeight weight);
 243
 244                 [DllImport (CairoImp)]
 245                 public static extern void cairo_set_font_size (IntPtr cr,
 246                                                              double size);
 247
 248                 [DllImport (CairoImp)]
 249                 public static extern void cairo_set_font_matrix (IntPtr cr,
 250                                                              Matrix_T matrix);
 251
 252                 [DllImport (CairoImp)]
 253                 public static extern void cairo_scale_font (IntPtr cr, double scale);
 254
 255                 [DllImport (CairoImp)]
 256                 public static extern void cairo_transform_font (IntPtr cr, IntPtr matrix);
 257
 258                 [DllImport (CairoImp)]
 259                 public static extern void cairo_show_text (IntPtr cr, string utf8);
 260
 261                 [DllImport (CairoImp)]
 262                 public static extern void cairo_font_set_transform (IntPtr font, IntPtr matrix);
 263
 264                 [DllImport (CairoImp)]
 265                 public static extern void cairo_font_current_transform (IntPtr font, IntPtr matrix);
 266
 267                 [DllImport (CairoImp)]
 268                 public static extern void cairo_font_reference (IntPtr font);
 269
 270                 [DllImport (CairoImp)]
 271                 public static extern void cairo_font_destroy (IntPtr font);
 272
 273                 [DllImport (CairoImp)]
 274                 public static extern void cairo_font_extents (IntPtr source, ref FontExtents extents);
 275
 276                 [DllImport (CairoImp)]
 277                 public static extern void cairo_show_glyphs (IntPtr ct, IntPtr glyphs, int num_glyphs);
 278
 279                 [DllImport (CairoImp)]
 280                 public static extern void cairo_text_path  (IntPtr ct, string utf8);
 281
 282                 [DllImport (CairoImp)]
 283                 public static extern void cairo_text_path  (IntPtr ct, string utf8, ref TextExtents extents);
 284
 285                 [DllImport (CairoImp)]
 286                 public static extern void cairo_glyph_path (IntPtr ct, IntPtr glyphs, int num_glyphs);
 287
 288                 //
 289                 // Image
 290                 //
 291                 [DllImport (CairoImp)]
 292                 public static extern void cairo_set_source_surface (IntPtr cr, IntPtr surface, int width, int height);
 293
 294                 [DllImport (CairoImp)]
 295                 public static extern void cairo_paint (IntPtr cr);
 296
 297                 [DllImport (CairoImp)]
 298                 public static extern IntPtr cairo_image_surface_create_from_png  (string filename);
 299
 300                 [DllImport (CairoImp)]
 301                 public static extern int cairo_image_surface_get_width  (IntPtr surface);
 302
 303                 [DllImport (CairoImp)]
 304                 public static extern int cairo_image_surface_get_height (IntPtr surface);
 305
 306                 //
 307                 // query
 308                 //
 309                 [DllImport (CairoImp)]
 310                 public static extern bool cairo_in_stroke (IntPtr cr, double x, double y);
 311
 312                 [DllImport (CairoImp)]
 313                 public static extern bool cairo_in_fill (IntPtr cr, double x, double y);
 314
 315                 [DllImport (CairoImp)]
 316                 public static extern Cairo.Operator cairo_get_operator (IntPtr cr);
 317
 318                 [DllImport (CairoImp)]
 319                 public static extern double cairo_get_tolerance (IntPtr cr);
 320
 321                 [DllImport (CairoImp)]
 322                 public static extern void cairo_get_current_point (
 323                         IntPtr cr, out double x, out double y);
 324
 325                 [DllImport (CairoImp)]
 326                 public static extern Cairo.FillRule cairo_get_fill_rule (IntPtr cr);
 327
 328                 [DllImport (CairoImp)]
 329                 public static extern double cairo_get_line_width (IntPtr cr);
 330
 331                 [DllImport (CairoImp)]
 332                 public static extern LineCap cairo_current_line_cap (IntPtr cr);
 333
 334                 [DllImport (CairoImp)]
 335                 public static extern LineJoin cairo_get_line_join (IntPtr cr);
 336
 337                 [DllImport (CairoImp)]
 338                 public static extern double cairo_get_miter_limit (IntPtr cr);
 339
 340                 [DllImport (CairoImp)]
 341                 public static extern void cairo_get_matrix (IntPtr cr, Matrix_T matrix);
 342
 343                 [DllImport (CairoImp)]
 344                 public static extern IntPtr cairo_get_target (IntPtr cr);
 345
 346                 //
 347                 // Error status queries
 348                 //
 349                 [DllImport (CairoImp)]
 350                 public static extern Cairo.Status cairo_status (IntPtr cr);
 351
 352                 [DllImport (CairoImp, EntryPoint="cairo_status_string")]
 353                 static extern IntPtr _cairo_status_string (IntPtr cr);
 354
 355                 public static string cairo_status_string (IntPtr cr)
 356                 {
 357                         return Marshal.PtrToStringAnsi (_cairo_status_string (cr));
 358                 }
 359
 360                 //
 361                 // Surface Manipulation
 362                 //
 363
 364                 [DllImport (CairoImp)]
 365                 public static extern IntPtr cairo_xlib_surface_create (IntPtr dpi,
 366                         IntPtr win, IntPtr visual, int w, int h);
 367
 368                 [DllImport (CairoImp)]
 369                 public static extern void cairo_xlib_surface_set_size (IntPtr surface, int width, int height);
 370
 371                 [DllImport (CairoImp)]
 372                 public static extern Cairo.Status cairo_surface_finish (IntPtr surface);
 373
 374                 [DllImport (CairoImp)]
 375                 public static extern void cairo_surface_set_device_offset (IntPtr surface,
 376                                                                        double x, double y);
 377
 378                 [DllImport (CairoImp)]
 379                 public static extern IntPtr cairo_image_surface_create_for_data (
 380                         string data, Cairo.Format format, int width, int height, int stride);
 381
 382                 [DllImport (CairoImp)]
 383                 public static extern IntPtr cairo_image_surface_create (Cairo.Format format, int width,
 384                         int height);
 385
 386
 387                 [DllImport (CairoImp)]
 388                 public static extern IntPtr cairo_surface_create_similar (
 389                         IntPtr surface, Cairo.Format format, int width, int height);
 390
 391                 [DllImport (CairoImp)]
 392                 public static extern IntPtr cairo_surface_create_similar_solid (
 393                         IntPtr surface, Cairo.Format format,
 394                         int width, int height, double red, double green, double blue, double alpha);
 395
 396                 [DllImport (CairoImp)]
 397                 public static extern void cairo_surface_reference (IntPtr surface);
 398
 399                 [DllImport (CairoImp)]
 400                 public static extern void cairo_surface_destroy (IntPtr surface);
 401
 402                 //
 403                 // Matrix
 404                 //
 405
 406                 [DllImport (CairoImp)]
 407                 public static extern void cairo_matrix_init (ref Matrix_T matrix,
 408                  double xx, double yx, double xy, double yy, double x0, double y0);
 409
 410                 [DllImport (CairoImp)]
 411                 public static extern void cairo_matrix_init_translate (ref Matrix_T matrix,
 412                                                          double tx, double ty);
 413
 414                 [DllImport (CairoImp)]
 415                 public static extern void cairo_matrix_translate (ref Matrix_T matrix,
 416                                                          double tx, double ty);
 417
 418                 [DllImport (CairoImp)]
 419                 public static extern void cairo_matrix_init_identity (ref Matrix_T matrix);
 420
 421                 [DllImport (CairoImp)]
 422                 public static extern void cairo_matrix_init_scale (ref Matrix_T matrix,
 423                                                                    double sx,
 424                                                                    double sy);
 425
 426                 [DllImport (CairoImp)]
 427                 public static extern void cairo_matrix_scale (ref Matrix_T matrix,
 428                                                                    double sx,
 429                                                                    double sy);
 430
 431                 [DllImport (CairoImp)]
 432                 public static extern void cairo_matrix_init_rotate (
 433                         ref Matrix_T matrix, double radians);
 434
 435                 [DllImport (CairoImp)]
 436                 public static extern void cairo_matrix_rotate (
 437                         ref Matrix_T matrix, double radians);
 438
 439                 [DllImport (CairoImp)]
 440                 public static extern Cairo.Status cairo_matrix_invert (ref Matrix_T matrix);
 441
 442                 [DllImport (CairoImp)]
 443                 public static extern void cairo_matrix_multiply (
 444                         ref Matrix_T result, ref Matrix_T a, ref Matrix_T b);
 445
 446                 [DllImport (CairoImp)]
 447                 public static extern void cairo_matrix_transform_distance (
 448                         ref Matrix_T matrix, ref double dx, ref double dy);
 449
 450                 [DllImport (CairoImp)]
 451                 public static extern void cairo_matrix_transform_point (
 452                         ref Matrix_T matrix, ref double x, ref double y);
 453
 454                 //
 455                 // Pattern functions
 456                 //
 457                 [DllImport (CairoImp)]
 458                 public static extern IntPtr cairo_pattern_create_for_surface (IntPtr surface);
 459
 460                 [DllImport (CairoImp)]
 461                 public static extern IntPtr cairo_pattern_create_linear (double x0, double y0,
 462                         double x1, double y1);
 463
 464                 [DllImport (CairoImp)]
 465                 public static extern IntPtr cairo_pattern_create_radial (double cx0, double cy0,
 466                         double radius0, double cx1, double cy1, double radius1);
 467
 468                 [DllImport (CairoImp)]
 469                 public static extern IntPtr cairo_pattern_create_rgb (double r,
 470                                                                   double g,
 471                                                                   double b);
 472
 473                 [DllImport (CairoImp)]
 474                 public static extern IntPtr cairo_pattern_create_rgba (double r,
 475                                                                   double g,
 476                                                                   double b,
 477                                                                   double a);
 478
 479                 [DllImport (CairoImp)]
 480                 public static extern void cairo_pattern_reference (IntPtr pattern);
 481
 482                 [DllImport (CairoImp)]
 483                 public static extern void cairo_pattern_destroy (IntPtr pattern);
 484
 485                 [DllImport (CairoImp)]
 486                 public static extern Status cairo_pattern_add_color_stop_rgba (IntPtr pattern,
 487                         double offset, double red, double green, double blue, double alpha);
 488
 489                 [DllImport (CairoImp)]
 490                 public static extern Status cairo_pattern_add_color_stop_rgb (IntPtr pattern,
 491                         double offset, double red, double green, double blue);
 492
 493                 [DllImport (CairoImp)]
 494                 public static extern Status cairo_pattern_set_matrix (IntPtr pattern, IntPtr matrix);
 495
 496                 [DllImport (CairoImp)]
 497                 public static extern Status cairo_pattern_get_matrix (IntPtr pattern, IntPtr matrix);
 498
 499                 [DllImport (CairoImp)]
 500                 public static extern Status cairo_pattern_set_extend (IntPtr pattern, Extend extend);
 501
 502                 [DllImport (CairoImp)]
 503                 public static extern Extend cairo_pattern_get_extend (IntPtr pattern);
 504
 505                 [DllImport (CairoImp)]
 506                 public static extern Status cairo_pattern_set_filter (IntPtr pattern, Filter filter);
 507
 508                 [DllImport (CairoImp)]
 509                 public static extern Filter cairo_pattern_get_filter (IntPtr pattern);
 510
 511                 [DllImport (CairoImp)]
 512                 public static extern Status cairo_pattern_status (IntPtr pattern);
 513
 514         }
 515
 516         //
 517         // Enumerations
 518         //
 519         public enum Format {
 520                 ARGB32 = 0,
 521                 RGB24 = 1,
 522                 A8 = 2,
 523                 A1 = 4
 524         }
 525
 526         public enum Operator {
 527                 Clear = 0,
 528                 Src = 1,
 529                 Dst = 2,
 530                 Over = 3,
 531                 OverReverse = 4,
 532                 In = 5,
 533                 InReverse = 6,
 534                 Out = 7,
 535                 OutReverse = 8,
 536                 Atop = 9,
 537                 AtopReverse = 10,
 538                 Xor = 11,
 539                 Add = 12,
 540                 Saturate = 13,
 541
 542                 DisjointClear = 16,
 543                 DisjointSrc = 17,
 544                 DisjointDst = 18,
 545                 DisjointOver = 19,
 546                 DisjointOverReverse = 20,
 547                 DisjointIn = 21,
 548                 DisjointInReverse = 22,
 549                 DisjointOut = 23,
 550                 DisjointOutReverse = 24,
 551                 DisjointAtop = 25,
 552                 DisjointAtopReverse = 26,
 553                 DisjointXor = 27,
 554
 555                 ConjointClear = 32,
 556                 ConjointSrc = 33,
 557                 ConjointDst = 34,
 558                 ConjointOver = 35,
 559                 ConjointOverReverse = 36,
 560                 ConjointIn = 37,
 561                 ConjointInReverse = 38,
 562                 ConjointOut = 39,
 563                 ConjointOutReverse = 40,
 564                 ConjointAtop = 41,
 565                 ConjointAtopReverse = 42,
 566                 ConjointXor = 43
 567         }
 568
 569         public enum FillRule {
 570                 Winding,
 571                 EvenOdd
 572         }
 573
 574         public enum LineCap {
 575                 Butt, Round, Square
 576         }
 577
 578         public enum LineJoin {
 579                 Miter, Round, Bevel
 580         }
 581
 582         public enum Status {
 583                 Success = 0,
 584                 NoMemory,
 585                 InvalidRestore,
 586                 InvalidPopGroup,
 587                 NoCurrentPoint,
 588                 InvalidMatrix
 589         }
 590
 591         public enum Filter {
 592                 Fast,
 593                 Good,
 594                 Best,
 595                 Nearest,
 596                 Bilinear,
 597                 Gaussian,
 598         }
 599
 600         public enum FontSlant {
 601                 Normal  = 0,
 602                 Italic  = 1,
 603                 Oblique = 2
 604         }
 605
 606         public enum FontWeight {
 607                 Normal  = 0,
 608                 Bold    = 1,
 609         }
 610
 611         public enum Extend {
 612                 None,
 613                 Repeat,
 614                 Reflect,
 615         }
 616
 617         [StructLayout(LayoutKind.Sequential)]
 618         public struct FontExtents
 619         {
 620                 public  double ascent;
 621                 public  double descent;
 622                 public  double height;
 623                 public  double max_x_advance;
 624                 public  double max_y_advance;
 625         }
 626
 627
 628         [StructLayout(LayoutKind.Sequential)]
 629         public struct TextExtents
 630         {
 631                 public  double x_bearing;
 632                 public  double y_bearing;
 633                 public  double width;
 634                 public  double height;
 635                 public  double x_advance;
 636                 public  double y_advance;
 637         }
 638
 639         [StructLayout(LayoutKind.Sequential)]
 640         public struct Glyph
 641         {
 642                 public  long index;
 643                 public  double x;
 644                 public  double y;
 645         }
 646
 647
 648 }