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1 | ///////////////////////////////////////////////////////////////////////////// | |
2 | // File: src/x11/region.cpp | |
3 | // Purpose: Region class | |
4 | // Author: Julian Smart, Robert Roebling | |
5 | // Created: Fri Oct 24 10:46:34 MET 1997 | |
6 | // RCS-ID: $Id$ | |
7 | // Copyright: (c) 1997 Julian Smart, Robert Roebling | |
8 | // Licence: wxWindows licence | |
9 | ///////////////////////////////////////////////////////////////////////////// | |
10 | ||
11 | // for compilers that support precompilation, includes "wx.h". | |
12 | #include "wx/wxprec.h" | |
13 | ||
14 | #include "wx/region.h" | |
15 | ||
16 | #ifndef WX_PRECOMP | |
17 | #include "wx/log.h" | |
18 | #endif | |
19 | ||
20 | #include "wx/gdicmn.h" | |
21 | ||
22 | #ifdef __VMS__ | |
23 | #pragma message disable nosimpint | |
24 | #endif | |
25 | #include "wx/x11/private.h" | |
26 | #include "X11/Xutil.h" | |
27 | #ifdef __VMS__ | |
28 | #pragma message enable nosimpint | |
29 | #endif | |
30 | ||
31 | // ---------------------------------------------------------------------------- | |
32 | // wxRegionRefData: private class containing the information about the region | |
33 | // ---------------------------------------------------------------------------- | |
34 | ||
35 | class wxRegionRefData : public wxObjectRefData | |
36 | { | |
37 | public: | |
38 | wxRegionRefData() | |
39 | { | |
40 | m_region = NULL; | |
41 | } | |
42 | ||
43 | wxRegionRefData(const wxRegionRefData& refData) | |
44 | { | |
45 | m_region = XCreateRegion(); | |
46 | XUnionRegion( refData.m_region, m_region, m_region ); | |
47 | } | |
48 | ||
49 | ~wxRegionRefData() | |
50 | { | |
51 | if (m_region) | |
52 | XDestroyRegion( m_region ); | |
53 | } | |
54 | ||
55 | Region m_region; | |
56 | }; | |
57 | ||
58 | // ---------------------------------------------------------------------------- | |
59 | // macros | |
60 | // ---------------------------------------------------------------------------- | |
61 | ||
62 | #define M_REGIONDATA ((wxRegionRefData *)m_refData) | |
63 | #define M_REGIONDATA_OF(rgn) ((wxRegionRefData *)(rgn.m_refData)) | |
64 | ||
65 | IMPLEMENT_DYNAMIC_CLASS(wxRegion, wxGDIObject) | |
66 | IMPLEMENT_DYNAMIC_CLASS(wxRegionIterator,wxObject) | |
67 | ||
68 | // ---------------------------------------------------------------------------- | |
69 | // wxRegion construction | |
70 | // ---------------------------------------------------------------------------- | |
71 | ||
72 | #define M_REGIONDATA ((wxRegionRefData *)m_refData) | |
73 | ||
74 | void wxRegion::InitRect(wxCoord x, wxCoord y, wxCoord w, wxCoord h) | |
75 | { | |
76 | XRectangle rect; | |
77 | rect.x = (short)x; | |
78 | rect.y = (short)y; | |
79 | rect.width = (unsigned short)w; | |
80 | rect.height = (unsigned short)h; | |
81 | ||
82 | m_refData = new wxRegionRefData(); | |
83 | ||
84 | M_REGIONDATA->m_region = XCreateRegion(); | |
85 | XUnionRectWithRegion( &rect, M_REGIONDATA->m_region, M_REGIONDATA->m_region ); | |
86 | } | |
87 | ||
88 | wxRegion::wxRegion( size_t WXUNUSED(n), const wxPoint *WXUNUSED(points), int WXUNUSED(fillStyle) ) | |
89 | { | |
90 | #if 0 | |
91 | XPoint *xpoints = new XPoint[n]; | |
92 | for ( size_t i = 0 ; i < n ; i++ ) | |
93 | { | |
94 | xpoints[i].x = points[i].x; | |
95 | xpoints[i].y = points[i].y; | |
96 | } | |
97 | ||
98 | m_refData = new wxRegionRefData(); | |
99 | ||
100 | Region* reg = gdk_region_polygon | |
101 | ( | |
102 | gdkpoints, | |
103 | n, | |
104 | fillStyle == wxWINDING_RULE ? GDK_WINDING_RULE | |
105 | : GDK_EVEN_ODD_RULE | |
106 | ); | |
107 | ||
108 | M_REGIONDATA->m_region = reg; | |
109 | ||
110 | delete [] xpoints; | |
111 | #endif | |
112 | } | |
113 | ||
114 | wxRegion::~wxRegion() | |
115 | { | |
116 | // m_refData unrefed in ~wxObject | |
117 | } | |
118 | ||
119 | wxObjectRefData *wxRegion::CreateRefData() const | |
120 | { | |
121 | return new wxRegionRefData; | |
122 | } | |
123 | ||
124 | wxObjectRefData *wxRegion::CloneRefData(const wxObjectRefData *data) const | |
125 | { | |
126 | return new wxRegionRefData(*(wxRegionRefData *)data); | |
127 | } | |
128 | ||
129 | // ---------------------------------------------------------------------------- | |
130 | // wxRegion comparison | |
131 | // ---------------------------------------------------------------------------- | |
132 | ||
133 | bool wxRegion::operator==( const wxRegion& region ) const | |
134 | { | |
135 | if (m_refData == region.m_refData) return true; | |
136 | ||
137 | if (!m_refData || !region.m_refData) return false; | |
138 | ||
139 | // compare the regions themselves, not the pointers to ref data! | |
140 | return XEqualRegion( M_REGIONDATA->m_region, | |
141 | M_REGIONDATA_OF(region)->m_region ) == True; | |
142 | } | |
143 | ||
144 | // ---------------------------------------------------------------------------- | |
145 | // wxRegion operations | |
146 | // ---------------------------------------------------------------------------- | |
147 | ||
148 | void wxRegion::Clear() | |
149 | { | |
150 | UnRef(); | |
151 | } | |
152 | ||
153 | bool wxRegion::Union( wxCoord x, wxCoord y, wxCoord width, wxCoord height ) | |
154 | { | |
155 | // work around for XUnionRectWithRegion() bug: taking a union with an empty | |
156 | // rect results in an empty region (at least XFree 3.3.6 and 4.0 have this | |
157 | // problem) | |
158 | if ( !width || !height ) | |
159 | return true; | |
160 | ||
161 | XRectangle rect; | |
162 | rect.x = (short)x; | |
163 | rect.y = (short)y; | |
164 | rect.width = (unsigned short)width; | |
165 | rect.height = (unsigned short)height; | |
166 | ||
167 | if (!m_refData) | |
168 | { | |
169 | m_refData = new wxRegionRefData(); | |
170 | M_REGIONDATA->m_region = XCreateRegion(); | |
171 | XUnionRectWithRegion( &rect, M_REGIONDATA->m_region, M_REGIONDATA->m_region ); | |
172 | } | |
173 | else | |
174 | { | |
175 | AllocExclusive(); | |
176 | ||
177 | XUnionRectWithRegion( &rect, M_REGIONDATA->m_region, M_REGIONDATA->m_region ); | |
178 | } | |
179 | ||
180 | return true; | |
181 | } | |
182 | ||
183 | bool wxRegion::Union( const wxRect& rect ) | |
184 | { | |
185 | return Union( rect.x, rect.y, rect.width, rect.height ); | |
186 | } | |
187 | ||
188 | bool wxRegion::Union( const wxRegion& region ) | |
189 | { | |
190 | if (region.IsNull()) | |
191 | return false; | |
192 | ||
193 | if (!m_refData) | |
194 | { | |
195 | m_refData = new wxRegionRefData(); | |
196 | M_REGIONDATA->m_region = XCreateRegion(); | |
197 | } | |
198 | else | |
199 | { | |
200 | AllocExclusive(); | |
201 | } | |
202 | ||
203 | XUnionRegion( M_REGIONDATA->m_region, | |
204 | M_REGIONDATA_OF(region)->m_region, | |
205 | M_REGIONDATA->m_region ); | |
206 | ||
207 | return true; | |
208 | } | |
209 | ||
210 | bool wxRegion::Intersect( wxCoord x, wxCoord y, wxCoord width, wxCoord height ) | |
211 | { | |
212 | wxRegion reg( x, y, width, height ); | |
213 | ||
214 | return Intersect( reg ); | |
215 | } | |
216 | ||
217 | bool wxRegion::Intersect( const wxRect& rect ) | |
218 | { | |
219 | wxRegion reg( rect ); | |
220 | ||
221 | return Intersect( reg ); | |
222 | } | |
223 | ||
224 | bool wxRegion::Intersect( const wxRegion& region ) | |
225 | { | |
226 | if (region.IsNull()) | |
227 | return false; | |
228 | ||
229 | if (!m_refData) | |
230 | { | |
231 | m_refData = new wxRegionRefData(); | |
232 | M_REGIONDATA->m_region = XCreateRegion(); | |
233 | ||
234 | // leave here | |
235 | return true; | |
236 | } | |
237 | else | |
238 | { | |
239 | AllocExclusive(); | |
240 | } | |
241 | ||
242 | XIntersectRegion( M_REGIONDATA->m_region, | |
243 | M_REGIONDATA_OF(region)->m_region, | |
244 | M_REGIONDATA->m_region ); | |
245 | ||
246 | return true; | |
247 | } | |
248 | ||
249 | bool wxRegion::Subtract( wxCoord x, wxCoord y, wxCoord width, wxCoord height ) | |
250 | { | |
251 | wxRegion reg( x, y, width, height ); | |
252 | return Subtract( reg ); | |
253 | } | |
254 | ||
255 | bool wxRegion::Subtract( const wxRect& rect ) | |
256 | { | |
257 | wxRegion reg( rect ); | |
258 | return Subtract( reg ); | |
259 | } | |
260 | ||
261 | bool wxRegion::Subtract( const wxRegion& region ) | |
262 | { | |
263 | if (region.IsNull()) | |
264 | return false; | |
265 | ||
266 | if (!m_refData) | |
267 | { | |
268 | m_refData = new wxRegionRefData(); | |
269 | M_REGIONDATA->m_region = XCreateRegion(); | |
270 | } | |
271 | else | |
272 | { | |
273 | AllocExclusive(); | |
274 | } | |
275 | ||
276 | XSubtractRegion( M_REGIONDATA->m_region, | |
277 | M_REGIONDATA_OF(region)->m_region, | |
278 | M_REGIONDATA->m_region ); | |
279 | ||
280 | return true; | |
281 | } | |
282 | ||
283 | bool wxRegion::Xor( wxCoord x, wxCoord y, wxCoord width, wxCoord height ) | |
284 | { | |
285 | wxRegion reg( x, y, width, height ); | |
286 | return Xor( reg ); | |
287 | } | |
288 | ||
289 | bool wxRegion::Xor( const wxRect& rect ) | |
290 | { | |
291 | wxRegion reg( rect ); | |
292 | return Xor( reg ); | |
293 | } | |
294 | ||
295 | bool wxRegion::Xor( const wxRegion& region ) | |
296 | { | |
297 | if (region.IsNull()) | |
298 | return false; | |
299 | ||
300 | if (!m_refData) | |
301 | { | |
302 | m_refData = new wxRegionRefData(); | |
303 | M_REGIONDATA->m_region = XCreateRegion(); | |
304 | } | |
305 | else | |
306 | { | |
307 | AllocExclusive(); | |
308 | } | |
309 | ||
310 | XXorRegion( M_REGIONDATA->m_region, | |
311 | M_REGIONDATA_OF(region)->m_region, | |
312 | M_REGIONDATA->m_region ); | |
313 | ||
314 | return true; | |
315 | } | |
316 | ||
317 | // ---------------------------------------------------------------------------- | |
318 | // wxRegion tests | |
319 | // ---------------------------------------------------------------------------- | |
320 | ||
321 | void wxRegion::GetBox( wxCoord &x, wxCoord &y, wxCoord &w, wxCoord &h ) const | |
322 | { | |
323 | if (m_refData) | |
324 | { | |
325 | XRectangle rect; | |
326 | XClipBox( M_REGIONDATA->m_region, &rect ); | |
327 | x = rect.x; | |
328 | y = rect.y; | |
329 | w = rect.width; | |
330 | h = rect.height; | |
331 | } | |
332 | else | |
333 | { | |
334 | x = 0; | |
335 | y = 0; | |
336 | w = -1; | |
337 | h = -1; | |
338 | } | |
339 | } | |
340 | ||
341 | wxRect wxRegion::GetBox() const | |
342 | { | |
343 | wxCoord x, y, w, h; | |
344 | GetBox( x, y, w, h ); | |
345 | return wxRect( x, y, w, h ); | |
346 | } | |
347 | ||
348 | bool wxRegion::Offset( wxCoord x, wxCoord y ) | |
349 | { | |
350 | if (!m_refData) | |
351 | return false; | |
352 | ||
353 | AllocExclusive(); | |
354 | ||
355 | XOffsetRegion( M_REGIONDATA->m_region, x, y ); | |
356 | ||
357 | return true; | |
358 | } | |
359 | ||
360 | bool wxRegion::Empty() const | |
361 | { | |
362 | if (!m_refData) | |
363 | return true; | |
364 | ||
365 | return XEmptyRegion( M_REGIONDATA->m_region ) == True; | |
366 | } | |
367 | ||
368 | wxRegionContain wxRegion::Contains( wxCoord x, wxCoord y ) const | |
369 | { | |
370 | if (!m_refData) | |
371 | return wxOutRegion; | |
372 | ||
373 | if (XPointInRegion( M_REGIONDATA->m_region, x, y )) | |
374 | return wxInRegion; | |
375 | else | |
376 | return wxOutRegion; | |
377 | } | |
378 | ||
379 | wxRegionContain wxRegion::Contains( wxCoord x, wxCoord y, wxCoord w, wxCoord h ) const | |
380 | { | |
381 | if (!m_refData) | |
382 | return wxOutRegion; | |
383 | ||
384 | int res = XRectInRegion( M_REGIONDATA->m_region, x, y, w, h ); | |
385 | switch (res) | |
386 | { | |
387 | case RectangleIn: return wxInRegion; | |
388 | case RectangleOut: return wxOutRegion; | |
389 | case RectanglePart: return wxPartRegion; | |
390 | } | |
391 | return wxOutRegion; | |
392 | } | |
393 | ||
394 | wxRegionContain wxRegion::Contains(const wxPoint& pt) const | |
395 | { | |
396 | return Contains( pt.x, pt.y ); | |
397 | } | |
398 | ||
399 | wxRegionContain wxRegion::Contains(const wxRect& rect) const | |
400 | { | |
401 | return Contains( rect.x, rect.y, rect.width, rect.height ); | |
402 | } | |
403 | ||
404 | WXRegion *wxRegion::GetX11Region() const | |
405 | { | |
406 | if (!m_refData) | |
407 | return (WXRegion*) NULL; | |
408 | ||
409 | return (WXRegion*) M_REGIONDATA->m_region; | |
410 | } | |
411 | ||
412 | // ---------------------------------------------------------------------------- | |
413 | // wxRegionIterator | |
414 | // ---------------------------------------------------------------------------- | |
415 | ||
416 | // the following structures must match the private structures | |
417 | // in X11 region code ( xc/lib/X11/region.h ) | |
418 | ||
419 | // this makes the Region type transparent | |
420 | // and we have access to the region rectangles | |
421 | ||
422 | struct _XBox { | |
423 | short x1, x2, y1, y2; | |
424 | }; | |
425 | ||
426 | struct _XRegion { | |
427 | long size , numRects; | |
428 | _XBox *rects, extents; | |
429 | }; | |
430 | ||
431 | class wxRIRefData: public wxObjectRefData | |
432 | { | |
433 | public: | |
434 | ||
435 | wxRIRefData() : m_rects(0), m_numRects(0){} | |
436 | ~wxRIRefData(); | |
437 | ||
438 | wxRect *m_rects; | |
439 | size_t m_numRects; | |
440 | ||
441 | void CreateRects( const wxRegion& r ); | |
442 | }; | |
443 | ||
444 | wxRIRefData::~wxRIRefData() | |
445 | { | |
446 | delete [] m_rects; | |
447 | } | |
448 | ||
449 | void wxRIRefData::CreateRects( const wxRegion& region ) | |
450 | { | |
451 | if (m_rects) | |
452 | delete [] m_rects; | |
453 | ||
454 | m_rects = 0; | |
455 | m_numRects = 0; | |
456 | ||
457 | if (region.IsEmpty()) return; | |
458 | ||
459 | Region r = (Region) region.GetX11Region(); | |
460 | if (r) | |
461 | { | |
462 | #if wxUSE_NANOX | |
463 | GR_RECT rect; | |
464 | GrGetRegionBox(r, & rect); | |
465 | m_numRects = 1; | |
466 | m_rects = new wxRect[1]; | |
467 | m_rects[0].x = rect.x; | |
468 | m_rects[0].y = rect.y; | |
469 | m_rects[0].width = rect.width; | |
470 | m_rects[0].height = rect.height; | |
471 | #else | |
472 | m_numRects = r->numRects; | |
473 | if (m_numRects) | |
474 | { | |
475 | m_rects = new wxRect[m_numRects]; | |
476 | for (size_t i=0; i < m_numRects; ++i) | |
477 | { | |
478 | _XBox &xr = r->rects[i]; | |
479 | wxRect &wr = m_rects[i]; | |
480 | wr.x = xr.x1; | |
481 | wr.y = xr.y1; | |
482 | wr.width = xr.x2-xr.x1; | |
483 | wr.height = xr.y2-xr.y1; | |
484 | } | |
485 | } | |
486 | #endif | |
487 | } | |
488 | } | |
489 | ||
490 | wxRegionIterator::wxRegionIterator() | |
491 | { | |
492 | m_refData = new wxRIRefData(); | |
493 | Reset(); | |
494 | } | |
495 | ||
496 | wxRegionIterator::wxRegionIterator( const wxRegion& region ) | |
497 | { | |
498 | m_refData = new wxRIRefData(); | |
499 | Reset(region); | |
500 | } | |
501 | ||
502 | void wxRegionIterator::Reset( const wxRegion& region ) | |
503 | { | |
504 | m_region = region; | |
505 | ((wxRIRefData*)m_refData)->CreateRects(region); | |
506 | Reset(); | |
507 | } | |
508 | ||
509 | bool wxRegionIterator::HaveRects() const | |
510 | { | |
511 | return m_current < ((wxRIRefData*)m_refData)->m_numRects; | |
512 | } | |
513 | ||
514 | wxRegionIterator::operator bool () const | |
515 | { | |
516 | return HaveRects(); | |
517 | } | |
518 | ||
519 | void wxRegionIterator::operator ++ () | |
520 | { | |
521 | if (HaveRects()) ++m_current; | |
522 | } | |
523 | ||
524 | void wxRegionIterator::operator ++ (int) | |
525 | { | |
526 | if (HaveRects()) ++m_current; | |
527 | } | |
528 | ||
529 | wxCoord wxRegionIterator::GetX() const | |
530 | { | |
531 | if( !HaveRects() ) return 0; | |
532 | return ((wxRIRefData*)m_refData)->m_rects[m_current].x; | |
533 | } | |
534 | ||
535 | wxCoord wxRegionIterator::GetY() const | |
536 | { | |
537 | if( !HaveRects() ) return 0; | |
538 | return ((wxRIRefData*)m_refData)->m_rects[m_current].y; | |
539 | } | |
540 | ||
541 | wxCoord wxRegionIterator::GetW() const | |
542 | { | |
543 | if( !HaveRects() ) return -1; | |
544 | return ((wxRIRefData*)m_refData)->m_rects[m_current].width; | |
545 | } | |
546 | ||
547 | wxCoord wxRegionIterator::GetH() const | |
548 | { | |
549 | if( !HaveRects() ) return -1; | |
550 | return ((wxRIRefData*)m_refData)->m_rects[m_current].height; | |
551 | } | |
552 | ||
553 | wxRect wxRegionIterator::GetRect() const | |
554 | { | |
555 | wxRect r; | |
556 | if( HaveRects() ) | |
557 | r = ((wxRIRefData*)m_refData)->m_rects[m_current]; | |
558 | ||
559 | return r; | |
560 | } |