- Fix registered guids for IPortMidi
[reactos.git] / reactos / dll / win32 / gdiplus / region.c
1 /*
2 * Copyright (C) 2008 Google (Lei Zhang)
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 #include <stdarg.h>
20
21 #include "windef.h"
22 #include "winbase.h"
23 #include "wingdi.h"
24
25 #include "objbase.h"
26
27 #include "gdiplus.h"
28 #include "gdiplus_private.h"
29 #include "wine/debug.h"
30
31 WINE_DEFAULT_DEBUG_CHANNEL(gdiplus);
32
33 /**********************************************************
34 *
35 * Data returned by GdipGetRegionData looks something like this:
36 *
37 * struct region_data_header
38 * {
39 * DWORD size; size in bytes of the data - 8.
40 * DWORD magic1; probably a checksum.
41 * DWORD magic2; always seems to be 0xdbc01001 - version?
42 * DWORD num_ops; number of combining ops * 2
43 * };
44 *
45 * Then follows a sequence of combining ops and region elements.
46 *
47 * A region element is either a RECTF or some path data.
48 *
49 * Combining ops are just stored as their CombineMode value.
50 *
51 * Each RECTF is preceded by the DWORD 0x10000000. An empty rect is
52 * stored as 0x10000002 (with no following RECTF) and an infinite rect
53 * is stored as 0x10000003 (again with no following RECTF).
54 *
55 * Path data is preceded by the DWORD 0x10000001. Then follows a
56 * DWORD size and then size bytes of data.
57 *
58 * The combining ops are stored in the reverse order to the region
59 * elements and in the reverse order to which the region was
60 * constructed.
61 *
62 * When two or more complex regions (ie those with more than one
63 * element) are combined, the combining op for the two regions comes
64 * first, then the combining ops for the region elements in region 1,
65 * followed by the region elements for region 1, then follows the
66 * combining ops for region 2 and finally region 2's region elements.
67 * Presumably you're supposed to use the 0x1000000x header to find the
68 * end of the op list (the count of the elements in each region is not
69 * stored).
70 *
71 * When a simple region (1 element) is combined, it's treated as if a
72 * single rect/path is being combined.
73 *
74 */
75
76 #define FLAGS_NOFLAGS 0x0
77 #define FLAGS_INTPATH 0x4000
78
79 /* Header size as far as header->size is concerned. This doesn't include
80 * header->size or header->checksum
81 */
82 static const INT sizeheader_size = sizeof(DWORD) * 2;
83
84 typedef struct packed_point
85 {
86 short X;
87 short Y;
88 } packed_point;
89
90 /* Everything is measured in DWORDS; round up if there's a remainder */
91 static inline INT get_pathtypes_size(const GpPath* path)
92 {
93 INT needed = path->pathdata.Count / sizeof(DWORD);
94
95 if (path->pathdata.Count % sizeof(DWORD) > 0)
96 needed++;
97
98 return needed * sizeof(DWORD);
99 }
100
101 static inline INT get_element_size(const region_element* element)
102 {
103 INT needed = sizeof(DWORD); /* DWORD for the type */
104 switch(element->type)
105 {
106 case RegionDataRect:
107 return needed + sizeof(GpRect);
108 case RegionDataPath:
109 needed += element->elementdata.pathdata.pathheader.size;
110 needed += sizeof(DWORD); /* Extra DWORD for pathheader.size */
111 return needed;
112 case RegionDataEmptyRect:
113 case RegionDataInfiniteRect:
114 return needed;
115 default:
116 needed += get_element_size(element->elementdata.combine.left);
117 needed += get_element_size(element->elementdata.combine.right);
118 return needed;
119 }
120
121 return 0;
122 }
123
124 /* Does not check parameters, caller must do that */
125 static inline GpStatus init_region(GpRegion* region, const RegionType type)
126 {
127 region->node.type = type;
128 region->header.checksum = 0xdeadbeef;
129 region->header.magic = VERSION_MAGIC;
130 region->header.num_children = 0;
131 region->header.size = sizeheader_size + get_element_size(&region->node);
132
133 return Ok;
134 }
135
136 static inline GpStatus clone_element(const region_element* element,
137 region_element** element2)
138 {
139 GpStatus stat;
140
141 /* root node is allocated with GpRegion */
142 if(!*element2){
143 *element2 = GdipAlloc(sizeof(region_element));
144 if (!*element2)
145 return OutOfMemory;
146 }
147
148 (*element2)->type = element->type;
149
150 switch (element->type)
151 {
152 case RegionDataRect:
153 (*element2)->elementdata.rect = element->elementdata.rect;
154 break;
155 case RegionDataEmptyRect:
156 case RegionDataInfiniteRect:
157 break;
158 case RegionDataPath:
159 (*element2)->elementdata.pathdata.pathheader = element->elementdata.pathdata.pathheader;
160 stat = GdipClonePath(element->elementdata.pathdata.path,
161 &(*element2)->elementdata.pathdata.path);
162 if (stat != Ok) goto clone_out;
163 break;
164 default:
165 (*element2)->elementdata.combine.left = NULL;
166 (*element2)->elementdata.combine.right = NULL;
167
168 stat = clone_element(element->elementdata.combine.left,
169 &(*element2)->elementdata.combine.left);
170 if (stat != Ok) goto clone_out;
171 stat = clone_element(element->elementdata.combine.right,
172 &(*element2)->elementdata.combine.right);
173 if (stat != Ok) goto clone_out;
174 break;
175 }
176
177 return Ok;
178
179 clone_out:
180 delete_element(*element2);
181 *element2 = NULL;
182 return stat;
183 }
184
185 /* Common code for CombineRegion*
186 * All the caller has to do is get its format into an element
187 */
188 static inline void fuse_region(GpRegion* region, region_element* left,
189 region_element* right, const CombineMode mode)
190 {
191 region->node.type = mode;
192 region->node.elementdata.combine.left = left;
193 region->node.elementdata.combine.right = right;
194
195 region->header.size = sizeheader_size + get_element_size(&region->node);
196 region->header.num_children += 2;
197 }
198
199 /*****************************************************************************
200 * GdipCloneRegion [GDIPLUS.@]
201 *
202 * Creates a deep copy of the region
203 *
204 * PARAMS
205 * region [I] source region
206 * clone [O] resulting clone
207 *
208 * RETURNS
209 * SUCCESS: Ok
210 * FAILURE: InvalidParameter or OutOfMemory
211 */
212 GpStatus WINGDIPAPI GdipCloneRegion(GpRegion *region, GpRegion **clone)
213 {
214 region_element *element;
215
216 TRACE("%p %p\n", region, clone);
217
218 if (!(region && clone))
219 return InvalidParameter;
220
221 *clone = GdipAlloc(sizeof(GpRegion));
222 if (!*clone)
223 return OutOfMemory;
224 element = &(*clone)->node;
225
226 (*clone)->header = region->header;
227 return clone_element(&region->node, &element);
228 }
229
230 /*****************************************************************************
231 * GdipCombineRegionPath [GDIPLUS.@]
232 */
233 GpStatus WINGDIPAPI GdipCombineRegionPath(GpRegion *region, GpPath *path, CombineMode mode)
234 {
235 GpRegion *path_region;
236 region_element *left, *right = NULL;
237 GpStatus stat;
238
239 TRACE("%p %p %d\n", region, path, mode);
240
241 if (!(region && path))
242 return InvalidParameter;
243
244 stat = GdipCreateRegionPath(path, &path_region);
245 if (stat != Ok)
246 return stat;
247
248 /* simply replace region data */
249 if(mode == CombineModeReplace){
250 delete_element(&region->node);
251 memcpy(region, path_region, sizeof(GpRegion));
252 return Ok;
253 }
254
255 left = GdipAlloc(sizeof(region_element));
256 if (!left)
257 goto out;
258 *left = region->node;
259
260 stat = clone_element(&path_region->node, &right);
261 if (stat != Ok)
262 goto out;
263
264 fuse_region(region, left, right, mode);
265
266 GdipDeleteRegion(path_region);
267 return Ok;
268
269 out:
270 GdipFree(left);
271 delete_element(right);
272 GdipDeleteRegion(path_region);
273 return stat;
274 }
275
276 /*****************************************************************************
277 * GdipCombineRegionRect [GDIPLUS.@]
278 */
279 GpStatus WINGDIPAPI GdipCombineRegionRect(GpRegion *region,
280 GDIPCONST GpRectF *rect, CombineMode mode)
281 {
282 GpRegion *rect_region;
283 region_element *left, *right = NULL;
284 GpStatus stat;
285
286 TRACE("%p %p %d\n", region, rect, mode);
287
288 if (!(region && rect))
289 return InvalidParameter;
290
291 stat = GdipCreateRegionRect(rect, &rect_region);
292 if (stat != Ok)
293 return stat;
294
295 /* simply replace region data */
296 if(mode == CombineModeReplace){
297 delete_element(&region->node);
298 memcpy(region, rect_region, sizeof(GpRegion));
299 return Ok;
300 }
301
302 left = GdipAlloc(sizeof(region_element));
303 if (!left)
304 goto out;
305 memcpy(left, &region->node, sizeof(region_element));
306
307 stat = clone_element(&rect_region->node, &right);
308 if (stat != Ok)
309 goto out;
310
311 fuse_region(region, left, right, mode);
312
313 GdipDeleteRegion(rect_region);
314 return Ok;
315
316 out:
317 GdipFree(left);
318 delete_element(right);
319 GdipDeleteRegion(rect_region);
320 return stat;
321 }
322
323 /*****************************************************************************
324 * GdipCombineRegionRectI [GDIPLUS.@]
325 */
326 GpStatus WINGDIPAPI GdipCombineRegionRectI(GpRegion *region,
327 GDIPCONST GpRect *rect, CombineMode mode)
328 {
329 GpRectF rectf;
330
331 TRACE("%p %p %d\n", region, rect, mode);
332
333 if (!rect)
334 return InvalidParameter;
335
336 rectf.X = (REAL)rect->X;
337 rectf.Y = (REAL)rect->Y;
338 rectf.Height = (REAL)rect->Height;
339 rectf.Width = (REAL)rect->Width;
340
341 return GdipCombineRegionRect(region, &rectf, mode);
342 }
343
344 GpStatus WINGDIPAPI GdipCombineRegionRegion(GpRegion *region1,
345 GpRegion *region2, CombineMode mode)
346 {
347 region_element *left, *right = NULL;
348 GpStatus stat;
349 GpRegion *reg2copy;
350
351 TRACE("%p %p %d\n", region1, region2, mode);
352
353 if(!(region1 && region2))
354 return InvalidParameter;
355
356 /* simply replace region data */
357 if(mode == CombineModeReplace){
358 stat = GdipCloneRegion(region2, &reg2copy);
359 if(stat != Ok) return stat;
360
361 delete_element(&region1->node);
362 memcpy(region1, reg2copy, sizeof(GpRegion));
363 GdipFree(reg2copy);
364 return Ok;
365 }
366
367 left = GdipAlloc(sizeof(region_element));
368 if (!left)
369 return OutOfMemory;
370
371 *left = region1->node;
372 stat = clone_element(&region2->node, &right);
373 if (stat != Ok)
374 {
375 GdipFree(left);
376 delete_element(right);
377 return OutOfMemory;
378 }
379
380 fuse_region(region1, left, right, mode);
381 region1->header.num_children += region2->header.num_children;
382
383 return Ok;
384 }
385
386 /*****************************************************************************
387 * GdipCreateRegion [GDIPLUS.@]
388 */
389 GpStatus WINGDIPAPI GdipCreateRegion(GpRegion **region)
390 {
391 TRACE("%p\n", region);
392
393 if(!region)
394 return InvalidParameter;
395
396 *region = GdipAlloc(sizeof(GpRegion));
397 if(!*region)
398 return OutOfMemory;
399
400 return init_region(*region, RegionDataInfiniteRect);
401 }
402
403 /*****************************************************************************
404 * GdipCreateRegionPath [GDIPLUS.@]
405 *
406 * Creates a GpRegion from a GpPath
407 *
408 * PARAMS
409 * path [I] path to base the region on
410 * region [O] pointer to the newly allocated region
411 *
412 * RETURNS
413 * SUCCESS: Ok
414 * FAILURE: InvalidParameter
415 *
416 * NOTES
417 * If a path has no floating point points, its points will be stored as shorts
418 * (INTPATH)
419 *
420 * If a path is empty, it is considered to be an INTPATH
421 */
422 GpStatus WINGDIPAPI GdipCreateRegionPath(GpPath *path, GpRegion **region)
423 {
424 region_element* element;
425 GpPoint *pointsi;
426 GpPointF *pointsf;
427
428 GpStatus stat;
429 DWORD flags = FLAGS_INTPATH;
430 INT count, i;
431
432 TRACE("%p, %p\n", path, region);
433
434 if (!(path && region))
435 return InvalidParameter;
436
437 *region = GdipAlloc(sizeof(GpRegion));
438 if(!*region)
439 return OutOfMemory;
440 stat = init_region(*region, RegionDataPath);
441 if (stat != Ok)
442 {
443 GdipDeleteRegion(*region);
444 return stat;
445 }
446 element = &(*region)->node;
447 count = path->pathdata.Count;
448
449 /* Test to see if the path is an Integer path */
450 if (count)
451 {
452 pointsi = GdipAlloc(sizeof(GpPoint) * count);
453 pointsf = GdipAlloc(sizeof(GpPointF) * count);
454 if (!(pointsi && pointsf))
455 {
456 GdipFree(pointsi);
457 GdipFree(pointsf);
458 GdipDeleteRegion(*region);
459 return OutOfMemory;
460 }
461
462 stat = GdipGetPathPointsI(path, pointsi, count);
463 if (stat != Ok)
464 {
465 GdipDeleteRegion(*region);
466 return stat;
467 }
468 stat = GdipGetPathPoints(path, pointsf, count);
469 if (stat != Ok)
470 {
471 GdipDeleteRegion(*region);
472 return stat;
473 }
474
475 for (i = 0; i < count; i++)
476 {
477 if (!(pointsi[i].X == pointsf[i].X &&
478 pointsi[i].Y == pointsf[i].Y ))
479 {
480 flags = FLAGS_NOFLAGS;
481 break;
482 }
483 }
484 GdipFree(pointsi);
485 GdipFree(pointsf);
486 }
487
488 stat = GdipClonePath(path, &element->elementdata.pathdata.path);
489 if (stat != Ok)
490 {
491 GdipDeleteRegion(*region);
492 return stat;
493 }
494
495 /* 3 for headers, once again size doesn't count itself */
496 element->elementdata.pathdata.pathheader.size = ((sizeof(DWORD) * 3));
497 switch(flags)
498 {
499 /* Floats, sent out as floats */
500 case FLAGS_NOFLAGS:
501 element->elementdata.pathdata.pathheader.size +=
502 (sizeof(DWORD) * count * 2);
503 break;
504 /* INTs, sent out as packed shorts */
505 case FLAGS_INTPATH:
506 element->elementdata.pathdata.pathheader.size +=
507 (sizeof(DWORD) * count);
508 break;
509 default:
510 FIXME("Unhandled flags (%08x). Expect wrong results.\n", flags);
511 }
512 element->elementdata.pathdata.pathheader.size += get_pathtypes_size(path);
513 element->elementdata.pathdata.pathheader.magic = VERSION_MAGIC;
514 element->elementdata.pathdata.pathheader.count = count;
515 element->elementdata.pathdata.pathheader.flags = flags;
516 (*region)->header.size = sizeheader_size + get_element_size(element);
517
518 return Ok;
519 }
520
521 /*****************************************************************************
522 * GdipCreateRegionRect [GDIPLUS.@]
523 */
524 GpStatus WINGDIPAPI GdipCreateRegionRect(GDIPCONST GpRectF *rect,
525 GpRegion **region)
526 {
527 GpStatus stat;
528
529 TRACE("%p, %p\n", rect, region);
530
531 if (!(rect && region))
532 return InvalidParameter;
533
534 *region = GdipAlloc(sizeof(GpRegion));
535 stat = init_region(*region, RegionDataRect);
536 if(stat != Ok)
537 {
538 GdipDeleteRegion(*region);
539 return stat;
540 }
541
542 (*region)->node.elementdata.rect.X = rect->X;
543 (*region)->node.elementdata.rect.Y = rect->Y;
544 (*region)->node.elementdata.rect.Width = rect->Width;
545 (*region)->node.elementdata.rect.Height = rect->Height;
546
547 return Ok;
548 }
549
550 GpStatus WINGDIPAPI GdipCreateRegionRectI(GDIPCONST GpRect *rect,
551 GpRegion **region)
552 {
553 GpRectF rectf;
554
555 TRACE("%p, %p\n", rect, region);
556
557 rectf.X = (REAL)rect->X;
558 rectf.Y = (REAL)rect->Y;
559 rectf.Width = (REAL)rect->Width;
560 rectf.Height = (REAL)rect->Height;
561
562 return GdipCreateRegionRect(&rectf, region);
563 }
564
565 GpStatus WINGDIPAPI GdipCreateRegionRgnData(GDIPCONST BYTE *data, INT size, GpRegion **region)
566 {
567 FIXME("(%p, %d, %p): stub\n", data, size, region);
568
569 *region = NULL;
570 return NotImplemented;
571 }
572
573 GpStatus WINGDIPAPI GdipCreateRegionHrgn(HRGN hrgn, GpRegion **region)
574 {
575 FIXME("(%p, %p): stub\n", hrgn, region);
576
577 if(!hrgn || !region)
578 return InvalidParameter;
579
580 *region = NULL;
581 return NotImplemented;
582 }
583
584 GpStatus WINGDIPAPI GdipDeleteRegion(GpRegion *region)
585 {
586 TRACE("%p\n", region);
587
588 if (!region)
589 return InvalidParameter;
590
591 delete_element(&region->node);
592 GdipFree(region);
593
594 return Ok;
595 }
596
597 GpStatus WINGDIPAPI GdipGetRegionBounds(GpRegion *region, GpGraphics *graphics, GpRectF *rect)
598 {
599 FIXME("(%p, %p, %p): stub\n", region, graphics, rect);
600
601 return NotImplemented;
602 }
603
604 GpStatus WINGDIPAPI GdipGetRegionBoundsI(GpRegion *region, GpGraphics *graphics, GpRect *rect)
605 {
606 FIXME("(%p, %p, %p): stub\n", region, graphics, rect);
607
608 return NotImplemented;
609 }
610
611 static inline void write_dword(DWORD* location, INT* offset, const DWORD write)
612 {
613 location[*offset] = write;
614 (*offset)++;
615 }
616
617 static inline void write_float(DWORD* location, INT* offset, const FLOAT write)
618 {
619 ((FLOAT*)location)[*offset] = write;
620 (*offset)++;
621 }
622
623 static inline void write_packed_point(DWORD* location, INT* offset,
624 const GpPointF* write)
625 {
626 packed_point point;
627
628 point.X = write->X;
629 point.Y = write->Y;
630 memcpy(location + *offset, &point, sizeof(packed_point));
631 (*offset)++;
632 }
633
634 static inline void write_path_types(DWORD* location, INT* offset,
635 const GpPath* path)
636 {
637 memcpy(location + *offset, path->pathdata.Types, path->pathdata.Count);
638
639 /* The unwritten parts of the DWORD (if any) must be cleared */
640 if (path->pathdata.Count % sizeof(DWORD))
641 ZeroMemory(((BYTE*)location) + (*offset * sizeof(DWORD)) +
642 path->pathdata.Count,
643 sizeof(DWORD) - path->pathdata.Count % sizeof(DWORD));
644 *offset += (get_pathtypes_size(path) / sizeof(DWORD));
645 }
646
647 static void write_element(const region_element* element, DWORD *buffer,
648 INT* filled)
649 {
650 write_dword(buffer, filled, element->type);
651 switch (element->type)
652 {
653 case CombineModeReplace:
654 case CombineModeIntersect:
655 case CombineModeUnion:
656 case CombineModeXor:
657 case CombineModeExclude:
658 case CombineModeComplement:
659 write_element(element->elementdata.combine.left, buffer, filled);
660 write_element(element->elementdata.combine.right, buffer, filled);
661 break;
662 case RegionDataRect:
663 write_float(buffer, filled, element->elementdata.rect.X);
664 write_float(buffer, filled, element->elementdata.rect.Y);
665 write_float(buffer, filled, element->elementdata.rect.Width);
666 write_float(buffer, filled, element->elementdata.rect.Height);
667 break;
668 case RegionDataPath:
669 {
670 INT i;
671 const GpPath* path = element->elementdata.pathdata.path;
672
673 memcpy(buffer + *filled, &element->elementdata.pathdata.pathheader,
674 sizeof(element->elementdata.pathdata.pathheader));
675 *filled += sizeof(element->elementdata.pathdata.pathheader) / sizeof(DWORD);
676 switch (element->elementdata.pathdata.pathheader.flags)
677 {
678 case FLAGS_NOFLAGS:
679 for (i = 0; i < path->pathdata.Count; i++)
680 {
681 write_float(buffer, filled, path->pathdata.Points[i].X);
682 write_float(buffer, filled, path->pathdata.Points[i].Y);
683 }
684 break;
685 case FLAGS_INTPATH:
686 for (i = 0; i < path->pathdata.Count; i++)
687 {
688 write_packed_point(buffer, filled,
689 &path->pathdata.Points[i]);
690 }
691 }
692 write_path_types(buffer, filled, path);
693 break;
694 }
695 case RegionDataEmptyRect:
696 case RegionDataInfiniteRect:
697 break;
698 }
699 }
700
701 /*****************************************************************************
702 * GdipGetRegionData [GDIPLUS.@]
703 *
704 * Returns the header, followed by combining ops and region elements.
705 *
706 * PARAMS
707 * region [I] region to retrieve from
708 * buffer [O] buffer to hold the resulting data
709 * size [I] size of the buffer
710 * needed [O] (optional) how much data was written
711 *
712 * RETURNS
713 * SUCCESS: Ok
714 * FAILURE: InvalidParamter
715 *
716 * NOTES
717 * The header contains the size, a checksum, a version string, and the number
718 * of children. The size does not count itself or the checksum.
719 * Version is always something like 0xdbc01001 or 0xdbc01002
720 *
721 * An element is a RECT, or PATH; Combining ops are stored as their
722 * CombineMode value. Special regions (infinite, empty) emit just their
723 * op-code; GpRectFs emit their code followed by their points; GpPaths emit
724 * their code followed by a second header for the path followed by the actual
725 * path data. Followed by the flags for each point. The pathheader contains
726 * the size of the data to follow, a version number again, followed by a count
727 * of how many points, and any special flags which may apply. 0x4000 means its
728 * a path of shorts instead of FLOAT.
729 *
730 * Combining Ops are stored in reverse order from when they were constructed;
731 * the output is a tree where the left side combining area is always taken
732 * first.
733 */
734 GpStatus WINGDIPAPI GdipGetRegionData(GpRegion *region, BYTE *buffer, UINT size,
735 UINT *needed)
736 {
737 INT filled = 0;
738
739 TRACE("%p, %p, %d, %p\n", region, buffer, size, needed);
740
741 if (!(region && buffer && size))
742 return InvalidParameter;
743
744 memcpy(buffer, &region->header, sizeof(region->header));
745 filled += sizeof(region->header) / sizeof(DWORD);
746 /* With few exceptions, everything written is DWORD aligned,
747 * so use that as our base */
748 write_element(&region->node, (DWORD*)buffer, &filled);
749
750 if (needed)
751 *needed = filled * sizeof(DWORD);
752
753 return Ok;
754 }
755
756 /*****************************************************************************
757 * GdipGetRegionDataSize [GDIPLUS.@]
758 */
759 GpStatus WINGDIPAPI GdipGetRegionDataSize(GpRegion *region, UINT *needed)
760 {
761 TRACE("%p, %p\n", region, needed);
762
763 if (!(region && needed))
764 return InvalidParameter;
765
766 /* header.size doesn't count header.size and header.checksum */
767 *needed = region->header.size + sizeof(DWORD) * 2;
768
769 return Ok;
770 }
771
772 static GpStatus get_path_hrgn(GpPath *path, GpGraphics *graphics, HRGN *hrgn)
773 {
774 HDC new_hdc=NULL;
775 GpStatus stat;
776 INT save_state;
777
778 if (!graphics)
779 {
780 new_hdc = GetDC(0);
781 if (!new_hdc)
782 return OutOfMemory;
783
784 stat = GdipCreateFromHDC(new_hdc, &graphics);
785 if (stat != Ok)
786 {
787 ReleaseDC(0, new_hdc);
788 return stat;
789 }
790 }
791
792 save_state = SaveDC(graphics->hdc);
793 EndPath(graphics->hdc);
794
795 SetPolyFillMode(graphics->hdc, (path->fill == FillModeAlternate ? ALTERNATE
796 : WINDING));
797
798 stat = trace_path(graphics, path);
799 if (stat == Ok)
800 {
801 *hrgn = PathToRegion(graphics->hdc);
802 stat = *hrgn ? Ok : OutOfMemory;
803 }
804
805 RestoreDC(graphics->hdc, save_state);
806 if (new_hdc)
807 {
808 ReleaseDC(0, new_hdc);
809 GdipDeleteGraphics(graphics);
810 }
811
812 return stat;
813 }
814
815 static GpStatus get_region_hrgn(struct region_element *element, GpGraphics *graphics, HRGN *hrgn)
816 {
817 switch (element->type)
818 {
819 case RegionDataInfiniteRect:
820 *hrgn = NULL;
821 return Ok;
822 case RegionDataEmptyRect:
823 *hrgn = CreateRectRgn(0, 0, 0, 0);
824 return *hrgn ? Ok : OutOfMemory;
825 case RegionDataPath:
826 return get_path_hrgn(element->elementdata.pathdata.path, graphics, hrgn);
827 case RegionDataRect:
828 {
829 GpPath* path;
830 GpStatus stat;
831 GpRectF* rc = &element->elementdata.rect;
832
833 stat = GdipCreatePath(FillModeAlternate, &path);
834 if (stat != Ok)
835 return stat;
836 stat = GdipAddPathRectangle(path, rc->X, rc->Y, rc->Width, rc->Height);
837
838 if (stat == Ok)
839 stat = get_path_hrgn(path, graphics, hrgn);
840
841 GdipDeletePath(path);
842
843 return stat;
844 }
845 case CombineModeIntersect:
846 case CombineModeUnion:
847 case CombineModeXor:
848 case CombineModeExclude:
849 case CombineModeComplement:
850 {
851 HRGN left, right;
852 GpStatus stat;
853 int ret;
854
855 stat = get_region_hrgn(element->elementdata.combine.left, graphics, &left);
856 if (stat != Ok)
857 {
858 *hrgn = NULL;
859 return stat;
860 }
861
862 if (left == NULL)
863 {
864 /* existing region is infinite */
865 switch (element->type)
866 {
867 case CombineModeIntersect:
868 return get_region_hrgn(element->elementdata.combine.right, graphics, hrgn);
869 case CombineModeXor: case CombineModeExclude:
870 FIXME("cannot exclude from an infinite region\n");
871 /* fall-through */
872 case CombineModeUnion: case CombineModeComplement:
873 *hrgn = NULL;
874 return Ok;
875 }
876 }
877
878 stat = get_region_hrgn(element->elementdata.combine.right, graphics, &right);
879 if (stat != Ok)
880 {
881 DeleteObject(left);
882 *hrgn = NULL;
883 return stat;
884 }
885
886 if (right == NULL)
887 {
888 /* new region is infinite */
889 switch (element->type)
890 {
891 case CombineModeIntersect:
892 *hrgn = left;
893 return Ok;
894 case CombineModeXor: case CombineModeComplement:
895 FIXME("cannot exclude from an infinite region\n");
896 /* fall-through */
897 case CombineModeUnion: case CombineModeExclude:
898 DeleteObject(left);
899 *hrgn = NULL;
900 return Ok;
901 }
902 }
903
904 switch (element->type)
905 {
906 case CombineModeIntersect:
907 ret = CombineRgn(left, left, right, RGN_AND);
908 break;
909 case CombineModeUnion:
910 ret = CombineRgn(left, left, right, RGN_OR);
911 break;
912 case CombineModeXor:
913 ret = CombineRgn(left, left, right, RGN_XOR);
914 break;
915 case CombineModeExclude:
916 ret = CombineRgn(left, left, right, RGN_DIFF);
917 break;
918 case CombineModeComplement:
919 ret = CombineRgn(left, right, left, RGN_DIFF);
920 break;
921 default:
922 ret = ERROR;
923 }
924
925 DeleteObject(right);
926
927 if (ret == ERROR)
928 {
929 DeleteObject(left);
930 *hrgn = NULL;
931 return GenericError;
932 }
933
934 *hrgn = left;
935 return Ok;
936 }
937 default:
938 FIXME("GdipGetRegionHRgn unimplemented for region type=%x\n", element->type);
939 *hrgn = NULL;
940 return NotImplemented;
941 }
942 }
943
944 /*****************************************************************************
945 * GdipGetRegionHRgn [GDIPLUS.@]
946 */
947 GpStatus WINGDIPAPI GdipGetRegionHRgn(GpRegion *region, GpGraphics *graphics, HRGN *hrgn)
948 {
949 TRACE("(%p, %p, %p)\n", region, graphics, hrgn);
950
951 if (!region || !hrgn)
952 return InvalidParameter;
953
954 return get_region_hrgn(&region->node, graphics, hrgn);
955 }
956
957 GpStatus WINGDIPAPI GdipIsEmptyRegion(GpRegion *region, GpGraphics *graphics, BOOL *res)
958 {
959 TRACE("(%p, %p, %p)\n", region, graphics, res);
960
961 if(!region || !graphics || !res)
962 return InvalidParameter;
963
964 *res = (region->node.type == RegionDataEmptyRect);
965
966 return Ok;
967 }
968
969 GpStatus WINGDIPAPI GdipIsEqualRegion(GpRegion *region, GpRegion *region2, GpGraphics *graphics,
970 BOOL *res)
971 {
972 FIXME("(%p, %p, %p, %p): stub\n", region, region2, graphics, res);
973
974 return NotImplemented;
975 }
976
977 /*****************************************************************************
978 * GdipIsInfiniteRegion [GDIPLUS.@]
979 */
980 GpStatus WINGDIPAPI GdipIsInfiniteRegion(GpRegion *region, GpGraphics *graphics, BOOL *res)
981 {
982 /* I think graphics is ignored here */
983 TRACE("(%p, %p, %p)\n", region, graphics, res);
984
985 if(!region || !graphics || !res)
986 return InvalidParameter;
987
988 *res = (region->node.type == RegionDataInfiniteRect);
989
990 return Ok;
991 }
992
993 /*****************************************************************************
994 * GdipSetEmpty [GDIPLUS.@]
995 */
996 GpStatus WINGDIPAPI GdipSetEmpty(GpRegion *region)
997 {
998 GpStatus stat;
999
1000 TRACE("%p\n", region);
1001
1002 if (!region)
1003 return InvalidParameter;
1004
1005 delete_element(&region->node);
1006 stat = init_region(region, RegionDataEmptyRect);
1007
1008 return stat;
1009 }
1010
1011 GpStatus WINGDIPAPI GdipSetInfinite(GpRegion *region)
1012 {
1013 GpStatus stat;
1014
1015 TRACE("%p\n", region);
1016
1017 if (!region)
1018 return InvalidParameter;
1019
1020 delete_element(&region->node);
1021 stat = init_region(region, RegionDataInfiniteRect);
1022
1023 return stat;
1024 }
1025
1026 GpStatus WINGDIPAPI GdipTransformRegion(GpRegion *region, GpMatrix *matrix)
1027 {
1028 FIXME("(%p, %p): stub\n", region, matrix);
1029
1030 return NotImplemented;
1031 }
1032
1033 GpStatus WINGDIPAPI GdipTranslateRegion(GpRegion *region, REAL dx, REAL dy)
1034 {
1035 FIXME("(%p, %f, %f): stub\n", region, dx, dy);
1036
1037 return NotImplemented;
1038 }
1039
1040 GpStatus WINGDIPAPI GdipTranslateRegionI(GpRegion *region, INT dx, INT dy)
1041 {
1042 FIXME("(%p, %d, %d): stub\n", region, dx, dy);
1043
1044 return NotImplemented;
1045 }