2 * DC clipping functions
4 * Copyright 1993 Alexandre Julliard
12 #define UPDATE_DIRTY_DC(dc) \
14 if ((dc)->hookProc && !((dc)->w.flags & (DC_SAVED | DC_MEMORY))) \
15 (dc)->hookProc( (dc)->hSelf, DCHC_INVALIDVISRGN, (dc)->dwHookData, 0 ); \
20 /***********************************************************************
21 * CLIPPING_UpdateGCRegion
23 * Update the GC clip region when the ClipRgn or VisRgn have changed.
25 void CLIPPING_UpdateGCRegion( DC * dc )
27 if (!dc->w.hGCClipRgn) dc->w.hGCClipRgn = CreateRectRgn32( 0, 0, 0, 0 );
31 ERR(region, "hVisRgn is zero. Please report this.\n" );
35 if (dc->w.flags & DC_DIRTY)
38 dc->w.flags &= ~DC_DIRTY;
42 CombineRgn32( dc->w.hGCClipRgn, dc->w.hVisRgn, 0, RGN_COPY );
44 CombineRgn32(dc->w.hGCClipRgn, dc->w.hClipRgn, dc->w.hVisRgn, RGN_AND);
45 if (dc->funcs->pSetDeviceClipping) dc->funcs->pSetDeviceClipping( dc );
49 /***********************************************************************
50 * SelectClipRgn16 (GDI.44)
52 INT16 WINAPI SelectClipRgn16( HDC16 hdc, HRGN16 hrgn )
54 return (INT16)SelectClipRgn32( hdc, hrgn );
58 /***********************************************************************
59 * SelectClipRgn32 (GDI32.297)
61 INT32 WINAPI SelectClipRgn32( HDC32 hdc, HRGN32 hrgn )
64 DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
65 if (!dc) return ERROR;
67 TRACE(clipping, "%04x %04x\n", hdc, hrgn );
71 if (!dc->w.hClipRgn) dc->w.hClipRgn = CreateRectRgn32(0,0,0,0);
72 retval = CombineRgn32( dc->w.hClipRgn, hrgn, 0, RGN_COPY );
76 if (dc->w.hClipRgn) DeleteObject16( dc->w.hClipRgn );
78 retval = SIMPLEREGION; /* Clip region == whole DC */
81 CLIPPING_UpdateGCRegion( dc );
82 GDI_HEAP_UNLOCK( hdc );
87 /***********************************************************************
88 * SelectVisRgn (GDI.105)
90 INT16 WINAPI SelectVisRgn( HDC16 hdc, HRGN16 hrgn )
93 DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
94 if (!dc || !hrgn) return ERROR;
96 TRACE(clipping, "%04x %04x\n", hdc, hrgn );
98 dc->w.flags &= ~DC_DIRTY;
100 retval = CombineRgn16( dc->w.hVisRgn, hrgn, 0, RGN_COPY );
101 CLIPPING_UpdateGCRegion( dc );
102 GDI_HEAP_UNLOCK( hdc );
107 /***********************************************************************
108 * OffsetClipRgn16 (GDI.32)
110 INT16 WINAPI OffsetClipRgn16( HDC16 hdc, INT16 x, INT16 y )
112 return (INT16)OffsetClipRgn32( hdc, x, y );
116 /***********************************************************************
117 * OffsetClipRgn32 (GDI32.255)
119 INT32 WINAPI OffsetClipRgn32( HDC32 hdc, INT32 x, INT32 y )
121 DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
124 dc = (DC *)GDI_GetObjPtr(hdc, METAFILE_DC_MAGIC);
125 if (!dc) return ERROR;
126 MF_MetaParam2(dc, META_OFFSETCLIPRGN, x, y);
127 GDI_HEAP_UNLOCK( hdc );
128 return NULLREGION; /* ?? */
131 TRACE(clipping, "%04x %d,%d\n", hdc, x, y );
135 INT32 ret = OffsetRgn32( dc->w.hClipRgn, XLPTODP(dc,x), YLPTODP(dc,y));
136 CLIPPING_UpdateGCRegion( dc );
137 GDI_HEAP_UNLOCK( hdc );
140 GDI_HEAP_UNLOCK( hdc );
141 return SIMPLEREGION; /* Clip region == client area */
145 /***********************************************************************
146 * OffsetVisRgn (GDI.102)
148 INT16 WINAPI OffsetVisRgn( HDC16 hdc, INT16 x, INT16 y )
151 DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
152 if (!dc) return ERROR;
153 TRACE(clipping, "%04x %d,%d\n", hdc, x, y );
154 retval = OffsetRgn32( dc->w.hVisRgn, x, y );
155 CLIPPING_UpdateGCRegion( dc );
156 GDI_HEAP_UNLOCK( hdc );
161 /***********************************************************************
162 * CLIPPING_IntersectClipRect
164 * Helper function for {Intersect,Exclude}ClipRect, can be called from
165 * elsewhere (like ExtTextOut()) to skip redundant metafile update and
166 * coordinate conversion.
168 INT32 CLIPPING_IntersectClipRect( DC * dc, INT32 left, INT32 top,
169 INT32 right, INT32 bottom, UINT32 flags )
174 if (!(newRgn = CreateRectRgn32( left, top, right, bottom ))) return ERROR;
177 if( flags & CLIP_INTERSECT )
179 dc->w.hClipRgn = newRgn;
180 CLIPPING_UpdateGCRegion( dc );
183 else if( flags & CLIP_EXCLUDE )
185 dc->w.hClipRgn = CreateRectRgn32( 0, 0, 0, 0 );
186 CombineRgn32( dc->w.hClipRgn, dc->w.hVisRgn, 0, RGN_COPY );
188 else WARN(clipping,"No hClipRgn and flags are %x\n",flags);
191 ret = CombineRgn32( newRgn, dc->w.hClipRgn, newRgn,
192 (flags & CLIP_EXCLUDE) ? RGN_DIFF : RGN_AND );
195 if (!(flags & CLIP_KEEPRGN)) DeleteObject32( dc->w.hClipRgn );
196 dc->w.hClipRgn = newRgn;
197 CLIPPING_UpdateGCRegion( dc );
199 else DeleteObject32( newRgn );
204 /***********************************************************************
205 * ExcludeClipRect16 (GDI.21)
207 INT16 WINAPI ExcludeClipRect16( HDC16 hdc, INT16 left, INT16 top,
208 INT16 right, INT16 bottom )
210 return (INT16)ExcludeClipRect32( hdc, left, top, right, bottom );
214 /***********************************************************************
215 * ExcludeClipRect32 (GDI32.92)
217 INT32 WINAPI ExcludeClipRect32( HDC32 hdc, INT32 left, INT32 top,
218 INT32 right, INT32 bottom )
221 DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
224 dc = (DC *)GDI_GetObjPtr(hdc, METAFILE_DC_MAGIC);
225 if (!dc) return ERROR;
226 MF_MetaParam4(dc, META_EXCLUDECLIPRECT, left, top, right, bottom);
227 GDI_HEAP_UNLOCK( hdc );
228 return NULLREGION; /* ?? */
231 left = XLPTODP( dc, left );
232 right = XLPTODP( dc, right );
233 top = YLPTODP( dc, top );
234 bottom = YLPTODP( dc, bottom );
236 TRACE(clipping, "%04x %dx%d,%dx%d\n",
237 hdc, left, top, right, bottom );
238 ret = CLIPPING_IntersectClipRect( dc, left, top, right, bottom, CLIP_EXCLUDE );
239 GDI_HEAP_UNLOCK( hdc );
244 /***********************************************************************
245 * IntersectClipRect16 (GDI.22)
247 INT16 WINAPI IntersectClipRect16( HDC16 hdc, INT16 left, INT16 top,
248 INT16 right, INT16 bottom )
250 return (INT16)IntersectClipRect32( hdc, left, top, right, bottom );
254 /***********************************************************************
255 * IntersectClipRect32 (GDI32.245)
257 INT32 WINAPI IntersectClipRect32( HDC32 hdc, INT32 left, INT32 top,
258 INT32 right, INT32 bottom )
261 DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
264 dc = (DC *)GDI_GetObjPtr(hdc, METAFILE_DC_MAGIC);
265 if (!dc) return ERROR;
266 MF_MetaParam4(dc, META_INTERSECTCLIPRECT, left, top, right, bottom);
267 GDI_HEAP_UNLOCK( hdc );
268 return NULLREGION; /* ?? */
271 left = XLPTODP( dc, left );
272 right = XLPTODP( dc, right );
273 top = YLPTODP( dc, top );
274 bottom = YLPTODP( dc, bottom );
276 TRACE(clipping, "%04x %dx%d,%dx%d\n",
277 hdc, left, top, right, bottom );
278 ret = CLIPPING_IntersectClipRect( dc, left, top, right, bottom, CLIP_INTERSECT );
279 GDI_HEAP_UNLOCK( hdc );
284 /***********************************************************************
285 * CLIPPING_IntersectVisRect
287 * Helper function for {Intersect,Exclude}VisRect
289 static INT32 CLIPPING_IntersectVisRect( DC * dc, INT32 left, INT32 top,
290 INT32 right, INT32 bottom,
293 HRGN32 tempRgn, newRgn;
296 left = XLPTODP( dc, left );
297 right = XLPTODP( dc, right );
298 top = YLPTODP( dc, top );
299 bottom = YLPTODP( dc, bottom );
301 if (!(newRgn = CreateRectRgn32( 0, 0, 0, 0 ))) return ERROR;
302 if (!(tempRgn = CreateRectRgn32( left, top, right, bottom )))
304 DeleteObject32( newRgn );
307 ret = CombineRgn32( newRgn, dc->w.hVisRgn, tempRgn,
308 exclude ? RGN_DIFF : RGN_AND );
309 DeleteObject32( tempRgn );
313 RGNOBJ *newObj = (RGNOBJ*)GDI_GetObjPtr( newRgn, REGION_MAGIC);
314 RGNOBJ *prevObj = (RGNOBJ*)GDI_GetObjPtr( dc->w.hVisRgn, REGION_MAGIC);
315 if (newObj && prevObj) newObj->header.hNext = prevObj->header.hNext;
316 DeleteObject32( dc->w.hVisRgn );
317 dc->w.hVisRgn = newRgn;
318 CLIPPING_UpdateGCRegion( dc );
319 GDI_HEAP_UNLOCK( newRgn );
321 else DeleteObject32( newRgn );
326 /***********************************************************************
327 * ExcludeVisRect (GDI.73)
329 INT16 WINAPI ExcludeVisRect( HDC16 hdc, INT16 left, INT16 top,
330 INT16 right, INT16 bottom )
332 DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
333 if (!dc) return ERROR;
334 TRACE(clipping, "%04x %dx%d,%dx%d\n",
335 hdc, left, top, right, bottom );
337 return CLIPPING_IntersectVisRect( dc, left, top, right, bottom, TRUE );
341 /***********************************************************************
342 * IntersectVisRect (GDI.98)
344 INT16 WINAPI IntersectVisRect( HDC16 hdc, INT16 left, INT16 top,
345 INT16 right, INT16 bottom )
347 DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
348 if (!dc) return ERROR;
349 TRACE(clipping, "%04x %dx%d,%dx%d\n",
350 hdc, left, top, right, bottom );
352 return CLIPPING_IntersectVisRect( dc, left, top, right, bottom, FALSE );
356 /***********************************************************************
357 * PtVisible16 (GDI.103)
359 BOOL16 WINAPI PtVisible16( HDC16 hdc, INT16 x, INT16 y )
361 return PtVisible32( hdc, x, y );
365 /***********************************************************************
366 * PtVisible32 (GDI32.279)
368 BOOL32 WINAPI PtVisible32( HDC32 hdc, INT32 x, INT32 y )
370 DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
371 if (!dc) return ERROR;
373 TRACE(clipping, "%04x %d,%d\n", hdc, x, y );
374 if (!dc->w.hGCClipRgn) return FALSE;
376 if( dc->w.flags & DC_DIRTY ) UPDATE_DIRTY_DC(dc);
377 dc->w.flags &= ~DC_DIRTY;
379 return PtInRegion32( dc->w.hGCClipRgn, XLPTODP(dc,x), YLPTODP(dc,y) );
383 /***********************************************************************
384 * RectVisible16 (GDI.104)
386 BOOL16 WINAPI RectVisible16( HDC16 hdc, LPRECT16 rect )
389 DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
390 if (!dc) return FALSE;
391 TRACE(clipping,"%04x %d,%dx%d,%d\n",
392 hdc, rect->left, rect->top, rect->right, rect->bottom );
393 if (!dc->w.hGCClipRgn) return FALSE;
394 /* copy rectangle to avoid overwriting by LPtoDP */
396 LPtoDP16( hdc, (LPPOINT16)&tmpRect, 2 );
397 return RectInRegion16( dc->w.hGCClipRgn, &tmpRect );
401 /***********************************************************************
402 * RectVisible32 (GDI32.282)
404 BOOL32 WINAPI RectVisible32( HDC32 hdc, LPRECT32 rect )
407 CONV_RECT32TO16( rect, &rect16 );
408 return RectVisible16( (HDC16)hdc, &rect16 );
412 /***********************************************************************
413 * GetClipBox16 (GDI.77)
415 INT16 WINAPI GetClipBox16( HDC16 hdc, LPRECT16 rect )
418 DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
419 if (!dc) return ERROR;
420 ret = GetRgnBox16( dc->w.hGCClipRgn, rect );
421 DPtoLP16( hdc, (LPPOINT16)rect, 2 );
426 /***********************************************************************
427 * GetClipBox32 (GDI32.162)
429 INT32 WINAPI GetClipBox32( HDC32 hdc, LPRECT32 rect )
432 DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
433 if (!dc) return ERROR;
434 ret = GetRgnBox32( dc->w.hGCClipRgn, rect );
435 DPtoLP32( hdc, (LPPOINT32)rect, 2 );
440 /***********************************************************************
441 * GetClipRgn32 (GDI32.163)
443 INT32 WINAPI GetClipRgn32( HDC32 hdc, HRGN32 hRgn )
445 DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
449 /* this assumes that dc->w.hClipRgn is in coordinates
450 relative to the DC origin (not device) */
452 if( CombineRgn32(hRgn, dc->w.hClipRgn, 0, RGN_COPY) != ERROR )
459 /***********************************************************************
460 * SaveVisRgn (GDI.129)
462 HRGN16 WINAPI SaveVisRgn( HDC16 hdc )
465 RGNOBJ *obj, *copyObj;
466 DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
468 TRACE(clipping, "%04x\n", hdc );
471 ERR(region, "hVisRgn is zero. Please report this.\n" );
474 if( dc->w.flags & DC_DIRTY ) UPDATE_DIRTY_DC(dc);
475 dc->w.flags &= ~DC_DIRTY;
477 if (!(obj = (RGNOBJ *) GDI_GetObjPtr( dc->w.hVisRgn, REGION_MAGIC )))
479 GDI_HEAP_UNLOCK( hdc );
482 if (!(copy = CreateRectRgn32( 0, 0, 0, 0 )))
484 GDI_HEAP_UNLOCK( dc->w.hVisRgn );
485 GDI_HEAP_UNLOCK( hdc );
488 CombineRgn32( copy, dc->w.hVisRgn, 0, RGN_COPY );
489 if (!(copyObj = (RGNOBJ *) GDI_GetObjPtr( copy, REGION_MAGIC )))
491 GDI_HEAP_UNLOCK( dc->w.hVisRgn );
492 GDI_HEAP_UNLOCK( hdc );
495 copyObj->header.hNext = obj->header.hNext;
496 obj->header.hNext = copy;
497 GDI_HEAP_UNLOCK( dc->w.hVisRgn );
498 GDI_HEAP_UNLOCK( hdc );
499 GDI_HEAP_UNLOCK( copy );
504 /***********************************************************************
505 * RestoreVisRgn (GDI.130)
507 INT16 WINAPI RestoreVisRgn( HDC16 hdc )
510 RGNOBJ *obj, *savedObj;
511 DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
514 if (!dc) return ERROR;
517 GDI_HEAP_UNLOCK( hdc );
520 TRACE(clipping, "%04x\n", hdc );
521 if (!(obj = (RGNOBJ *) GDI_GetObjPtr( dc->w.hVisRgn, REGION_MAGIC )))
523 GDI_HEAP_UNLOCK( hdc );
526 if (!(saved = obj->header.hNext))
528 GDI_HEAP_UNLOCK( dc->w.hVisRgn );
529 GDI_HEAP_UNLOCK( hdc );
532 if (!(savedObj = (RGNOBJ *) GDI_GetObjPtr( saved, REGION_MAGIC )))
534 GDI_HEAP_UNLOCK( dc->w.hVisRgn );
535 GDI_HEAP_UNLOCK( hdc );
538 DeleteObject32( dc->w.hVisRgn );
539 dc->w.hVisRgn = saved;
540 CLIPPING_UpdateGCRegion( dc );
541 GDI_HEAP_UNLOCK( hdc );
542 ret = savedObj->rgn->type; /* FIXME */
543 GDI_HEAP_UNLOCK( saved );