dlls/gdiplus/graphicspath.c

   1 /*
   2  * Copyright (C) 2007 Google (Evan Stade)
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  *
  18  */
  19
  20 #include <stdarg.h>
  21 #include <math.h>
  22
  23 #include "windef.h"
  24 #include "winbase.h"
  25 #include "winuser.h"
  26 #include "wingdi.h"
  27
  28 #include "objbase.h"
  29
  30 #include "gdiplus.h"
  31 #include "gdiplus_private.h"
  32 #include "wine/debug.h"
  33
  34 WINE_DEFAULT_DEBUG_CHANNEL(gdiplus);
  35
  36 /* make sure path has enough space for len more points */
  37 static BOOL lengthen_path(GpPath *path, INT len)
  38 {
  39     /* initial allocation */
  40     if(path->datalen == 0){
  41         path->datalen = len * 2;
  42
  43         path->pathdata.Points = GdipAlloc(path->datalen * sizeof(PointF));
  44         if(!path->pathdata.Points)   return FALSE;
  45
  46         path->pathdata.Types = GdipAlloc(path->datalen);
  47         if(!path->pathdata.Types){
  48             GdipFree(path->pathdata.Points);
  49             return FALSE;
  50         }
  51     }
  52     /* reallocation, double size of arrays */
  53     else if(path->datalen - path->pathdata.Count < len){
  54         while(path->datalen - path->pathdata.Count < len)
  55             path->datalen *= 2;
  56
  57         path->pathdata.Points = HeapReAlloc(GetProcessHeap(), 0,
  58             path->pathdata.Points, path->datalen * sizeof(PointF));
  59         if(!path->pathdata.Points)  return FALSE;
  60
  61         path->pathdata.Types = HeapReAlloc(GetProcessHeap(), 0,
  62             path->pathdata.Types, path->datalen);
  63         if(!path->pathdata.Types)   return FALSE;
  64     }
  65
  66     return TRUE;
  67 }
  68
  69 GpStatus WINGDIPAPI GdipAddPathArc(GpPath *path, REAL x1, REAL y1, REAL x2,
  70     REAL y2, REAL startAngle, REAL sweepAngle)
  71 {
  72     INT count, old_count, i;
  73
  74     if(!path)
  75         return InvalidParameter;
  76
  77     count = arc2polybezier(NULL, x1, y1, x2, y2, startAngle, sweepAngle);
  78
  79     if(count == 0)
  80         return Ok;
  81     if(!lengthen_path(path, count))
  82         return OutOfMemory;
  83
  84     old_count = path->pathdata.Count;
  85     arc2polybezier(&path->pathdata.Points[old_count], x1, y1, x2, y2,
  86                    startAngle, sweepAngle);
  87
  88     for(i = 0; i < count; i++){
  89         path->pathdata.Types[old_count + i] = PathPointTypeBezier;
  90     }
  91
  92     path->pathdata.Types[old_count] =
  93         (path->newfigure ? PathPointTypeStart : PathPointTypeLine);
  94     path->newfigure = FALSE;
  95     path->pathdata.Count += count;
  96
  97     return Ok;
  98 }
  99
 100 GpStatus WINGDIPAPI GdipAddPathArcI(GpPath *path, INT x1, INT y1, INT x2,
 101    INT y2, REAL startAngle, REAL sweepAngle)
 102 {
 103     return GdipAddPathArc(path,(REAL)x1,(REAL)y1,(REAL)x2,(REAL)y2,startAngle,sweepAngle);
 104 }
 105
 106 GpStatus WINGDIPAPI GdipAddPathBezier(GpPath *path, REAL x1, REAL y1, REAL x2,
 107     REAL y2, REAL x3, REAL y3, REAL x4, REAL y4)
 108 {
 109     INT old_count;
 110
 111     if(!path)
 112         return InvalidParameter;
 113
 114     if(!lengthen_path(path, 4))
 115         return OutOfMemory;
 116
 117     old_count = path->pathdata.Count;
 118
 119     path->pathdata.Points[old_count].X = x1;
 120     path->pathdata.Points[old_count].Y = y1;
 121     path->pathdata.Points[old_count + 1].X = x2;
 122     path->pathdata.Points[old_count + 1].Y = y2;
 123     path->pathdata.Points[old_count + 2].X = x3;
 124     path->pathdata.Points[old_count + 2].Y = y3;
 125     path->pathdata.Points[old_count + 3].X = x4;
 126     path->pathdata.Points[old_count + 3].Y = y4;
 127
 128     path->pathdata.Types[old_count] =
 129         (path->newfigure ? PathPointTypeStart : PathPointTypeLine);
 130     path->pathdata.Types[old_count + 1] = PathPointTypeBezier;
 131     path->pathdata.Types[old_count + 2] = PathPointTypeBezier;
 132     path->pathdata.Types[old_count + 3] = PathPointTypeBezier;
 133
 134     path->newfigure = FALSE;
 135     path->pathdata.Count += 4;
 136
 137     return Ok;
 138 }
 139
 140 GpStatus WINGDIPAPI GdipAddPathBezierI(GpPath *path, INT x1, INT y1, INT x2,
 141     INT y2, INT x3, INT y3, INT x4, INT y4)
 142 {
 143     return GdipAddPathBezier(path,(REAL)x1,(REAL)y1,(REAL)x2,(REAL)y2,(REAL)x3,(REAL)y3,
 144                                   (REAL)x4,(REAL)y4);
 145 }
 146
 147 GpStatus WINGDIPAPI GdipAddPathBeziers(GpPath *path, GDIPCONST GpPointF *points,
 148     INT count)
 149 {
 150     INT i, old_count;
 151
 152     if(!path || !points || ((count - 1) % 3))
 153         return InvalidParameter;
 154
 155     if(!lengthen_path(path, count))
 156         return OutOfMemory;
 157
 158     old_count = path->pathdata.Count;
 159
 160     for(i = 0; i < count; i++){
 161         path->pathdata.Points[old_count + i].X = points[i].X;
 162         path->pathdata.Points[old_count + i].Y = points[i].Y;
 163         path->pathdata.Types[old_count + i] = PathPointTypeBezier;
 164     }
 165
 166     path->pathdata.Types[old_count] =
 167         (path->newfigure ? PathPointTypeStart : PathPointTypeLine);
 168     path->newfigure = FALSE;
 169     path->pathdata.Count += count;
 170
 171     return Ok;
 172 }
 173
 174 GpStatus WINGDIPAPI GdipAddPathBeziersI(GpPath *path, GDIPCONST GpPoint *points,
 175     INT count)
 176 {
 177     GpPointF *ptsF;
 178     GpStatus ret;
 179     INT i;
 180
 181     if(!points || ((count - 1) % 3))
 182         return InvalidParameter;
 183
 184     ptsF = GdipAlloc(sizeof(GpPointF) * count);
 185     if(!ptsF)
 186         return OutOfMemory;
 187
 188     for(i = 0; i < count; i++){
 189         ptsF[i].X = (REAL)points[i].X;
 190         ptsF[i].Y = (REAL)points[i].Y;
 191     }
 192
 193     ret = GdipAddPathBeziers(path, ptsF, count);
 194     GdipFree(ptsF);
 195
 196     return ret;
 197 }
 198
 199 GpStatus WINGDIPAPI GdipAddPathEllipse(GpPath *path, REAL x, REAL y, REAL width,
 200     REAL height)
 201 {
 202     INT old_count, numpts;
 203
 204     if(!path)
 205         return InvalidParameter;
 206
 207     if(!lengthen_path(path, MAX_ARC_PTS))
 208         return OutOfMemory;
 209
 210     old_count = path->pathdata.Count;
 211     if((numpts = arc2polybezier(&path->pathdata.Points[old_count],  x, y, width,
 212                                height, 0.0, 360.0)) != MAX_ARC_PTS){
 213         ERR("expected %d points but got %d\n", MAX_ARC_PTS, numpts);
 214         return GenericError;
 215     }
 216
 217     memset(&path->pathdata.Types[old_count + 1], PathPointTypeBezier,
 218            MAX_ARC_PTS - 1);
 219
 220     /* An ellipse is an intrinsic figure (always is its own subpath). */
 221     path->pathdata.Types[old_count] = PathPointTypeStart;
 222     path->pathdata.Types[old_count + MAX_ARC_PTS - 1] |= PathPointTypeCloseSubpath;
 223     path->newfigure = TRUE;
 224     path->pathdata.Count += MAX_ARC_PTS;
 225
 226     return Ok;
 227 }
 228
 229 GpStatus WINGDIPAPI GdipAddPathEllipseI(GpPath *path, INT x, INT y, INT width,
 230     INT height)
 231 {
 232     return GdipAddPathEllipse(path,(REAL)x,(REAL)y,(REAL)width,(REAL)height);
 233 }
 234
 235 GpStatus WINGDIPAPI GdipAddPathLine2(GpPath *path, GDIPCONST GpPointF *points,
 236     INT count)
 237 {
 238     INT i, old_count;
 239
 240     if(!path || !points)
 241         return InvalidParameter;
 242
 243     if(!lengthen_path(path, count))
 244         return OutOfMemory;
 245
 246     old_count = path->pathdata.Count;
 247
 248     for(i = 0; i < count; i++){
 249         path->pathdata.Points[old_count + i].X = points[i].X;
 250         path->pathdata.Points[old_count + i].Y = points[i].Y;
 251         path->pathdata.Types[old_count + i] = PathPointTypeLine;
 252     }
 253
 254     if(path->newfigure){
 255         path->pathdata.Types[old_count] = PathPointTypeStart;
 256         path->newfigure = FALSE;
 257     }
 258
 259     path->pathdata.Count += count;
 260
 261     return Ok;
 262 }
 263
 264 GpStatus WINGDIPAPI GdipAddPathLine2I(GpPath *path, GDIPCONST GpPoint *points, INT count)
 265 {
 266     GpPointF *pointsF;
 267     INT i;
 268     GpStatus stat;
 269
 270     if(count <= 0)
 271         return InvalidParameter;
 272
 273     pointsF = GdipAlloc(sizeof(GpPointF) * count);
 274     if(!pointsF)    return OutOfMemory;
 275
 276     for(i = 0;i < count; i++){
 277         pointsF[i].X = (REAL)points[i].X;
 278         pointsF[i].Y = (REAL)points[i].Y;
 279     }
 280
 281     stat = GdipAddPathLine2(path, pointsF, count);
 282
 283     GdipFree(pointsF);
 284
 285     return stat;
 286 }
 287
 288 GpStatus WINGDIPAPI GdipAddPathLine(GpPath *path, REAL x1, REAL y1, REAL x2, REAL y2)
 289 {
 290     INT old_count;
 291
 292     if(!path)
 293         return InvalidParameter;
 294
 295     if(!lengthen_path(path, 2))
 296         return OutOfMemory;
 297
 298     old_count = path->pathdata.Count;
 299
 300     path->pathdata.Points[old_count].X = x1;
 301     path->pathdata.Points[old_count].Y = y1;
 302     path->pathdata.Points[old_count + 1].X = x2;
 303     path->pathdata.Points[old_count + 1].Y = y2;
 304
 305     path->pathdata.Types[old_count] =
 306         (path->newfigure ? PathPointTypeStart : PathPointTypeLine);
 307     path->pathdata.Types[old_count + 1] = PathPointTypeLine;
 308
 309     path->newfigure = FALSE;
 310     path->pathdata.Count += 2;
 311
 312     return Ok;
 313 }
 314
 315 GpStatus WINGDIPAPI GdipAddPathLineI(GpPath *path, INT x1, INT y1, INT x2, INT y2)
 316 {
 317     return GdipAddPathLine(path, (REAL)x1, (REAL)y1, (REAL)x2, (REAL)y2);
 318 }
 319
 320 GpStatus WINGDIPAPI GdipAddPathPath(GpPath *path, GDIPCONST GpPath* addingPath,
 321     BOOL connect)
 322 {
 323     INT old_count, count;
 324
 325     if(!path || !addingPath)
 326         return InvalidParameter;
 327
 328     old_count = path->pathdata.Count;
 329     count = addingPath->pathdata.Count;
 330
 331     if(!lengthen_path(path, count))
 332         return OutOfMemory;
 333
 334     memcpy(&path->pathdata.Points[old_count], addingPath->pathdata.Points,
 335            count * sizeof(GpPointF));
 336     memcpy(&path->pathdata.Types[old_count], addingPath->pathdata.Types, count);
 337
 338     if(path->newfigure || !connect)
 339         path->pathdata.Types[old_count] = PathPointTypeStart;
 340     else
 341         path->pathdata.Types[old_count] = PathPointTypeLine;
 342
 343     path->newfigure = FALSE;
 344     path->pathdata.Count += count;
 345
 346     return Ok;
 347 }
 348
 349 GpStatus WINGDIPAPI GdipClonePath(GpPath* path, GpPath **clone)
 350 {
 351     if(!path || !clone)
 352         return InvalidParameter;
 353
 354     *clone = GdipAlloc(sizeof(GpPath));
 355     if(!*clone) return OutOfMemory;
 356
 357     **clone = *path;
 358
 359     (*clone)->pathdata.Points = GdipAlloc(path->datalen * sizeof(PointF));
 360     (*clone)->pathdata.Types = GdipAlloc(path->datalen);
 361     if(!(*clone)->pathdata.Points || !(*clone)->pathdata.Types){
 362         GdipFree(*clone);
 363         GdipFree((*clone)->pathdata.Points);
 364         GdipFree((*clone)->pathdata.Types);
 365         return OutOfMemory;
 366     }
 367
 368     memcpy((*clone)->pathdata.Points, path->pathdata.Points,
 369            path->datalen * sizeof(PointF));
 370     memcpy((*clone)->pathdata.Types, path->pathdata.Types, path->datalen);
 371
 372     return Ok;
 373 }
 374
 375 GpStatus WINGDIPAPI GdipClosePathFigure(GpPath* path)
 376 {
 377     if(!path)
 378         return InvalidParameter;
 379
 380     if(path->pathdata.Count > 0){
 381         path->pathdata.Types[path->pathdata.Count - 1] |= PathPointTypeCloseSubpath;
 382         path->newfigure = TRUE;
 383     }
 384
 385     return Ok;
 386 }
 387
 388 GpStatus WINGDIPAPI GdipClosePathFigures(GpPath* path)
 389 {
 390     INT i;
 391
 392     if(!path)
 393         return InvalidParameter;
 394
 395     for(i = 1; i < path->pathdata.Count; i++){
 396         if(path->pathdata.Types[i] == PathPointTypeStart)
 397             path->pathdata.Types[i-1] |= PathPointTypeCloseSubpath;
 398     }
 399
 400     path->newfigure = TRUE;
 401
 402     return Ok;
 403 }
 404
 405 GpStatus WINGDIPAPI GdipCreatePath(GpFillMode fill, GpPath **path)
 406 {
 407     if(!path)
 408         return InvalidParameter;
 409
 410     *path = GdipAlloc(sizeof(GpPath));
 411     if(!*path)  return OutOfMemory;
 412
 413     (*path)->fill = fill;
 414     (*path)->newfigure = TRUE;
 415
 416     return Ok;
 417 }
 418
 419 GpStatus WINGDIPAPI GdipCreatePath2(GDIPCONST GpPointF* points,
 420     GDIPCONST BYTE* types, INT count, GpFillMode fill, GpPath **path)
 421 {
 422     if(!path)
 423         return InvalidParameter;
 424
 425     *path = GdipAlloc(sizeof(GpPath));
 426     if(!*path)  return OutOfMemory;
 427
 428     (*path)->pathdata.Points = GdipAlloc(count * sizeof(PointF));
 429     (*path)->pathdata.Types = GdipAlloc(count);
 430
 431     if(!(*path)->pathdata.Points || !(*path)->pathdata.Types){
 432         GdipFree((*path)->pathdata.Points);
 433         GdipFree((*path)->pathdata.Types);
 434         GdipFree(*path);
 435         return OutOfMemory;
 436     }
 437
 438     memcpy((*path)->pathdata.Points, points, count * sizeof(PointF));
 439     memcpy((*path)->pathdata.Types, types, count);
 440     (*path)->pathdata.Count = count;
 441     (*path)->datalen = count;
 442
 443     (*path)->fill = fill;
 444     (*path)->newfigure = TRUE;
 445
 446     return Ok;
 447 }
 448
 449 GpStatus WINGDIPAPI GdipCreatePath2I(GDIPCONST GpPoint* points,
 450     GDIPCONST BYTE* types, INT count, GpFillMode fill, GpPath **path)
 451 {
 452     GpPointF *ptF;
 453     GpStatus ret;
 454     INT i;
 455
 456     ptF = GdipAlloc(sizeof(GpPointF)*count);
 457
 458     for(i = 0;i < count; i++){
 459         ptF[i].X = (REAL)points[i].X;
 460         ptF[i].Y = (REAL)points[i].Y;
 461     }
 462
 463     ret = GdipCreatePath2(ptF, types, count, fill, path);
 464
 465     GdipFree(ptF);
 466
 467     return ret;
 468 }
 469
 470 GpStatus WINGDIPAPI GdipDeletePath(GpPath *path)
 471 {
 472     if(!path)
 473         return InvalidParameter;
 474
 475     GdipFree(path->pathdata.Points);
 476     GdipFree(path->pathdata.Types);
 477     GdipFree(path);
 478
 479     return Ok;
 480 }
 481
 482 GpStatus WINGDIPAPI GdipGetPathFillMode(GpPath *path, GpFillMode *fillmode)
 483 {
 484     if(!path || !fillmode)
 485         return InvalidParameter;
 486
 487     *fillmode = path->fill;
 488
 489     return Ok;
 490 }
 491
 492 GpStatus WINGDIPAPI GdipGetPathPoints(GpPath *path, GpPointF* points, INT count)
 493 {
 494     if(!path)
 495         return InvalidParameter;
 496
 497     if(count < path->pathdata.Count)
 498         return InsufficientBuffer;
 499
 500     memcpy(points, path->pathdata.Points, path->pathdata.Count * sizeof(GpPointF));
 501
 502     return Ok;
 503 }
 504
 505 GpStatus WINGDIPAPI GdipGetPathPointsI(GpPath *path, GpPoint* points, INT count)
 506 {
 507     GpStatus ret;
 508     GpPointF *ptf;
 509     INT i;
 510
 511     if(count <= 0)
 512         return InvalidParameter;
 513
 514     ptf = GdipAlloc(sizeof(GpPointF)*count);
 515     if(!ptf)    return OutOfMemory;
 516
 517     ret = GdipGetPathPoints(path,ptf,count);
 518     if(ret == Ok)
 519         for(i = 0;i < count;i++){
 520             points[i].X = roundr(ptf[i].X);
 521             points[i].Y = roundr(ptf[i].Y);
 522         };
 523     GdipFree(ptf);
 524
 525     return ret;
 526 }
 527
 528 GpStatus WINGDIPAPI GdipGetPathTypes(GpPath *path, BYTE* types, INT count)
 529 {
 530     if(!path)
 531         return InvalidParameter;
 532
 533     if(count < path->pathdata.Count)
 534         return InsufficientBuffer;
 535
 536     memcpy(types, path->pathdata.Types, path->pathdata.Count);
 537
 538     return Ok;
 539 }
 540
 541 /* Windows expands the bounding box to the maximum possible bounding box
 542  * for a given pen.  For example, if a line join can extend past the point
 543  * it's joining by x units, the bounding box is extended by x units in every
 544  * direction (even though this is too conservative for most cases). */
 545 GpStatus WINGDIPAPI GdipGetPathWorldBounds(GpPath* path, GpRectF* bounds,
 546     GDIPCONST GpMatrix *matrix, GDIPCONST GpPen *pen)
 547 {
 548     GpPointF * points, temp_pts[4];
 549     INT count, i;
 550     REAL path_width = 1.0, width, height, temp, low_x, low_y, high_x, high_y;
 551
 552     /* Matrix and pen can be null. */
 553     if(!path || !bounds)
 554         return InvalidParameter;
 555
 556     /* If path is empty just return. */
 557     count = path->pathdata.Count;
 558     if(count == 0){
 559         bounds->X = bounds->Y = bounds->Width = bounds->Height = 0.0;
 560         return Ok;
 561     }
 562
 563     points = path->pathdata.Points;
 564
 565     low_x = high_x = points[0].X;
 566     low_y = high_y = points[0].Y;
 567
 568     for(i = 1; i < count; i++){
 569         low_x = min(low_x, points[i].X);
 570         low_y = min(low_y, points[i].Y);
 571         high_x = max(high_x, points[i].X);
 572         high_y = max(high_y, points[i].Y);
 573     }
 574
 575     width = high_x - low_x;
 576     height = high_y - low_y;
 577
 578     /* This looks unusual but it's the only way I can imitate windows. */
 579     if(matrix){
 580         temp_pts[0].X = low_x;
 581         temp_pts[0].Y = low_y;
 582         temp_pts[1].X = low_x;
 583         temp_pts[1].Y = high_y;
 584         temp_pts[2].X = high_x;
 585         temp_pts[2].Y = high_y;
 586         temp_pts[3].X = high_x;
 587         temp_pts[3].Y = low_y;
 588
 589         GdipTransformMatrixPoints((GpMatrix*)matrix, temp_pts, 4);
 590         low_x = temp_pts[0].X;
 591         low_y = temp_pts[0].Y;
 592
 593         for(i = 1; i < 4; i++){
 594             low_x = min(low_x, temp_pts[i].X);
 595             low_y = min(low_y, temp_pts[i].Y);
 596         }
 597
 598         temp = width;
 599         width = height * fabs(matrix->matrix[2]) + width * fabs(matrix->matrix[0]);
 600         height = height * fabs(matrix->matrix[3]) + temp * fabs(matrix->matrix[1]);
 601     }
 602
 603     if(pen){
 604         path_width = pen->width / 2.0;
 605
 606         if(count > 2)
 607             path_width = max(path_width,  pen->width * pen->miterlimit / 2.0);
 608         /* FIXME: this should probably also check for the startcap */
 609         if(pen->endcap & LineCapNoAnchor)
 610             path_width = max(path_width,  pen->width * 2.2);
 611
 612         low_x -= path_width;
 613         low_y -= path_width;
 614         width += 2.0 * path_width;
 615         height += 2.0 * path_width;
 616     }
 617
 618     bounds->X = low_x;
 619     bounds->Y = low_y;
 620     bounds->Width = width;
 621     bounds->Height = height;
 622
 623     return Ok;
 624 }
 625
 626 GpStatus WINGDIPAPI GdipGetPathWorldBoundsI(GpPath* path, GpRect* bounds,
 627     GDIPCONST GpMatrix *matrix, GDIPCONST GpPen *pen)
 628 {
 629     GpStatus ret;
 630     GpRectF boundsF;
 631
 632     ret = GdipGetPathWorldBounds(path,&boundsF,matrix,pen);
 633
 634     if(ret == Ok){
 635         bounds->X      = roundr(boundsF.X);
 636         bounds->Y      = roundr(boundsF.Y);
 637         bounds->Width  = roundr(boundsF.Width);
 638         bounds->Height = roundr(boundsF.Height);
 639     }
 640
 641     return ret;
 642 }
 643
 644 GpStatus WINGDIPAPI GdipGetPointCount(GpPath *path, INT *count)
 645 {
 646     if(!path)
 647         return InvalidParameter;
 648
 649     *count = path->pathdata.Count;
 650
 651     return Ok;
 652 }
 653
 654 GpStatus WINGDIPAPI GdipIsOutlineVisiblePathPointI(GpPath* path, INT x, INT y,
 655     GpPen *pen, GpGraphics *graphics, BOOL *result)
 656 {
 657     static int calls;
 658
 659     if(!path || !pen)
 660         return InvalidParameter;
 661
 662     if(!(calls++))
 663         FIXME("not implemented\n");
 664
 665     return NotImplemented;
 666 }
 667
 668 GpStatus WINGDIPAPI GdipStartPathFigure(GpPath *path)
 669 {
 670     if(!path)
 671         return InvalidParameter;
 672
 673     path->newfigure = TRUE;
 674
 675     return Ok;
 676 }
 677
 678 GpStatus WINGDIPAPI GdipResetPath(GpPath *path)
 679 {
 680     if(!path)
 681         return InvalidParameter;
 682
 683     path->pathdata.Count = 0;
 684     path->newfigure = TRUE;
 685     path->fill = FillModeAlternate;
 686
 687     return Ok;
 688 }
 689
 690 GpStatus WINGDIPAPI GdipSetPathFillMode(GpPath *path, GpFillMode fill)
 691 {
 692     if(!path)
 693         return InvalidParameter;
 694
 695     path->fill = fill;
 696
 697     return Ok;
 698 }
 699
 700 GpStatus WINGDIPAPI GdipTransformPath(GpPath *path, GpMatrix *matrix)
 701 {
 702     if(!path)
 703         return InvalidParameter;
 704
 705     if(path->pathdata.Count == 0)
 706         return Ok;
 707
 708     return GdipTransformMatrixPoints(matrix, path->pathdata.Points,
 709                                      path->pathdata.Count);
 710 }
 711
 712 GpStatus WINGDIPAPI GdipAddPathRectangle(GpPath *path, REAL x, REAL y,
 713     REAL width, REAL height)
 714 {
 715     GpPath *backup;
 716     GpPointF ptf[2];
 717     GpStatus retstat;
 718     BOOL old_new;
 719
 720     if(!path || width < 0.0 || height < 0.0)
 721         return InvalidParameter;
 722
 723     /* make a backup copy of path data */
 724     if((retstat = GdipClonePath(path, &backup)) != Ok)
 725         return retstat;
 726
 727     /* rectangle should start as new path */
 728     old_new = path->newfigure;
 729     path->newfigure = TRUE;
 730     if((retstat = GdipAddPathLine(path,x,y,x+width,y)) != Ok){
 731         path->newfigure = old_new;
 732         goto fail;
 733     }
 734
 735     ptf[0].X = x+width;
 736     ptf[0].Y = y+height;
 737     ptf[1].X = x;
 738     ptf[1].Y = y+height;
 739
 740     if((retstat = GdipAddPathLine2(path,(GDIPCONST GpPointF*)&ptf,2)) != Ok)  goto fail;
 741     path->pathdata.Types[path->pathdata.Count-1] |= PathPointTypeCloseSubpath;
 742
 743     /* free backup */
 744     GdipDeletePath(backup);
 745     return Ok;
 746
 747 fail:
 748     /* reverting */
 749     GdipDeletePath(path);
 750     GdipClonePath(backup, &path);
 751     GdipDeletePath(backup);
 752
 753     return retstat;
 754 }
 755
 756 GpStatus WINGDIPAPI GdipAddPathRectangleI(GpPath *path, INT x, INT y,
 757     INT width, INT height)
 758 {
 759     return GdipAddPathRectangle(path,(REAL)x,(REAL)y,(REAL)width,(REAL)height);
 760 }