2 * DC clipping functions
4 * Copyright 1993 Alexandre Julliard
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 #include "wine/winuser16.h"
27 #include "wine/debug.h"
29 WINE_DEFAULT_DEBUG_CHANNEL(clipping);
32 /***********************************************************************
33 * CLIPPING_UpdateGCRegion
35 * Update the GC clip region when the ClipRgn or VisRgn have changed.
37 void CLIPPING_UpdateGCRegion( DC * dc )
39 if (!dc->hGCClipRgn) dc->hGCClipRgn = CreateRectRgn( 0, 0, 0, 0 );
43 ERR("hVisRgn is zero. Please report this.\n" );
47 if (dc->flags & DC_DIRTY) ERR( "DC is dirty. Please report this.\n" );
50 CombineRgn( dc->hGCClipRgn, dc->hVisRgn, 0, RGN_COPY );
52 CombineRgn(dc->hGCClipRgn, dc->hClipRgn, dc->hVisRgn, RGN_AND);
53 if (dc->funcs->pSetDeviceClipping)
54 dc->funcs->pSetDeviceClipping( dc->physDev, dc->hGCClipRgn );
58 /***********************************************************************
59 * SelectClipRgn (GDI32.@)
61 INT WINAPI SelectClipRgn( HDC hdc, HRGN hrgn )
63 return ExtSelectClipRgn( hdc, hrgn, RGN_COPY );
67 /******************************************************************************
68 * ExtSelectClipRgn [GDI32.@]
70 INT WINAPI ExtSelectClipRgn( HDC hdc, HRGN hrgn, INT fnMode )
74 DC * dc = DC_GetDCUpdate( hdc );
75 if (!dc) return ERROR;
77 TRACE("%p %p %d\n", hdc, hrgn, fnMode );
79 if (dc->funcs->pExtSelectClipRgn)
81 retval = dc->funcs->pExtSelectClipRgn( dc->physDev, hrgn, fnMode );
82 GDI_ReleaseObj( hdc );
88 if (fnMode == RGN_COPY)
90 if (dc->hClipRgn) DeleteObject( dc->hClipRgn );
95 FIXME("Unimplemented: hrgn NULL in mode: %d\n", fnMode);
96 GDI_ReleaseObj( hdc );
105 GetRgnBox( dc->hVisRgn, &rect );
106 dc->hClipRgn = CreateRectRgnIndirect( &rect );
109 if(fnMode == RGN_COPY)
110 CombineRgn( dc->hClipRgn, hrgn, 0, fnMode );
112 CombineRgn( dc->hClipRgn, dc->hClipRgn, hrgn, fnMode);
115 CLIPPING_UpdateGCRegion( dc );
116 GDI_ReleaseObj( hdc );
118 return GetClipBox(hdc, &rect);
121 /***********************************************************************
122 * SelectVisRgn (GDI.105)
124 INT16 WINAPI SelectVisRgn16( HDC16 hdc16, HRGN16 hrgn )
127 HDC hdc = HDC_32( hdc16 );
130 if (!hrgn) return ERROR;
131 if (!(dc = DC_GetDCPtr( hdc ))) return ERROR;
133 TRACE("%p %04x\n", hdc, hrgn );
135 dc->flags &= ~DC_DIRTY;
137 retval = CombineRgn( dc->hVisRgn, HRGN_32(hrgn), 0, RGN_COPY );
138 CLIPPING_UpdateGCRegion( dc );
139 GDI_ReleaseObj( hdc );
144 /***********************************************************************
145 * OffsetClipRgn (GDI32.@)
147 INT WINAPI OffsetClipRgn( HDC hdc, INT x, INT y )
149 INT ret = SIMPLEREGION;
150 DC *dc = DC_GetDCUpdate( hdc );
151 if (!dc) return ERROR;
153 TRACE("%p %d,%d\n", hdc, x, y );
155 if(dc->funcs->pOffsetClipRgn)
156 ret = dc->funcs->pOffsetClipRgn( dc->physDev, x, y );
157 else if (dc->hClipRgn) {
158 ret = OffsetRgn( dc->hClipRgn, XLSTODS(dc,x), YLSTODS(dc,y));
159 CLIPPING_UpdateGCRegion( dc );
161 GDI_ReleaseObj( hdc );
166 /***********************************************************************
167 * OffsetVisRgn (GDI.102)
169 INT16 WINAPI OffsetVisRgn16( HDC16 hdc16, INT16 x, INT16 y )
172 HDC hdc = HDC_32( hdc16 );
173 DC * dc = DC_GetDCUpdate( hdc );
174 if (!dc) return ERROR;
175 TRACE("%p %d,%d\n", hdc, x, y );
176 retval = OffsetRgn( dc->hVisRgn, x, y );
177 CLIPPING_UpdateGCRegion( dc );
178 GDI_ReleaseObj( hdc );
183 /***********************************************************************
184 * ExcludeClipRect (GDI32.@)
186 INT WINAPI ExcludeClipRect( HDC hdc, INT left, INT top,
187 INT right, INT bottom )
191 DC *dc = DC_GetDCUpdate( hdc );
192 if (!dc) return ERROR;
194 TRACE("%p %dx%d,%dx%d\n", hdc, left, top, right, bottom );
196 if(dc->funcs->pExcludeClipRect)
197 ret = dc->funcs->pExcludeClipRect( dc->physDev, left, top, right, bottom );
206 LPtoDP( hdc, pt, 2 );
207 if (!(newRgn = CreateRectRgn( pt[0].x, pt[0].y, pt[1].x, pt[1].y ))) ret = ERROR;
212 dc->hClipRgn = CreateRectRgn( 0, 0, 0, 0 );
213 CombineRgn( dc->hClipRgn, dc->hVisRgn, 0, RGN_COPY );
215 ret = CombineRgn( dc->hClipRgn, dc->hClipRgn, newRgn, RGN_DIFF );
216 DeleteObject( newRgn );
218 if (ret != ERROR) CLIPPING_UpdateGCRegion( dc );
220 GDI_ReleaseObj( hdc );
225 /***********************************************************************
226 * IntersectClipRect (GDI32.@)
228 INT WINAPI IntersectClipRect( HDC hdc, INT left, INT top, INT right, INT bottom )
231 DC *dc = DC_GetDCUpdate( hdc );
232 if (!dc) return ERROR;
234 TRACE("%p %d,%d - %d,%d\n", hdc, left, top, right, bottom );
236 if(dc->funcs->pIntersectClipRect)
237 ret = dc->funcs->pIntersectClipRect( dc->physDev, left, top, right, bottom );
247 LPtoDP( hdc, pt, 2 );
251 dc->hClipRgn = CreateRectRgn( pt[0].x, pt[0].y, pt[1].x, pt[1].y );
258 if (!(newRgn = CreateRectRgn( pt[0].x, pt[0].y, pt[1].x, pt[1].y ))) ret = ERROR;
261 ret = CombineRgn( dc->hClipRgn, dc->hClipRgn, newRgn, RGN_AND );
262 DeleteObject( newRgn );
265 if (ret != ERROR) CLIPPING_UpdateGCRegion( dc );
267 GDI_ReleaseObj( hdc );
272 /***********************************************************************
273 * ExcludeVisRect (GDI.73)
275 INT16 WINAPI ExcludeVisRect16( HDC16 hdc16, INT16 left, INT16 top, INT16 right, INT16 bottom )
280 HDC hdc = HDC_32( hdc16 );
281 DC * dc = DC_GetDCUpdate( hdc );
282 if (!dc) return ERROR;
289 LPtoDP( hdc, pt, 2 );
291 TRACE("%p %ld,%ld - %ld,%ld\n", hdc, pt[0].x, pt[0].y, pt[1].x, pt[1].y);
293 if (!(tempRgn = CreateRectRgn( pt[0].x, pt[0].y, pt[1].x, pt[1].y ))) ret = ERROR;
296 ret = CombineRgn( dc->hVisRgn, dc->hVisRgn, tempRgn, RGN_DIFF );
297 DeleteObject( tempRgn );
299 if (ret != ERROR) CLIPPING_UpdateGCRegion( dc );
300 GDI_ReleaseObj( hdc );
305 /***********************************************************************
306 * IntersectVisRect (GDI.98)
308 INT16 WINAPI IntersectVisRect16( HDC16 hdc16, INT16 left, INT16 top, INT16 right, INT16 bottom )
313 HDC hdc = HDC_32( hdc16 );
314 DC * dc = DC_GetDCUpdate( hdc );
315 if (!dc) return ERROR;
322 LPtoDP( hdc, pt, 2 );
324 TRACE("%p %ld,%ld - %ld,%ld\n", hdc, pt[0].x, pt[0].y, pt[1].x, pt[1].y);
327 if (!(tempRgn = CreateRectRgn( pt[0].x, pt[0].y, pt[1].x, pt[1].y ))) ret = ERROR;
330 ret = CombineRgn( dc->hVisRgn, dc->hVisRgn, tempRgn, RGN_AND );
331 DeleteObject( tempRgn );
333 if (ret != ERROR) CLIPPING_UpdateGCRegion( dc );
334 GDI_ReleaseObj( hdc );
339 /***********************************************************************
340 * PtVisible (GDI32.@)
342 BOOL WINAPI PtVisible( HDC hdc, INT x, INT y )
345 DC *dc = DC_GetDCUpdate( hdc );
347 TRACE("%p %d,%d\n", hdc, x, y );
348 if (!dc) return FALSE;
355 LPtoDP( hdc, &pt, 1 );
356 ret = PtInRegion( dc->hGCClipRgn, pt.x, pt.y );
358 GDI_ReleaseObj( hdc );
363 /***********************************************************************
364 * RectVisible (GDI32.@)
366 BOOL WINAPI RectVisible( HDC hdc, const RECT* rect )
369 DC *dc = DC_GetDCUpdate( hdc );
370 if (!dc) return FALSE;
371 TRACE("%p %ld,%ldx%ld,%ld\n", hdc, rect->left, rect->top, rect->right, rect->bottom );
377 pt[0].x = rect->left;
379 pt[1].x = rect->right;
380 pt[1].y = rect->bottom;
381 LPtoDP( hdc, pt, 2 );
382 tmpRect.left = pt[0].x;
383 tmpRect.top = pt[0].y;
384 tmpRect.right = pt[1].x;
385 tmpRect.bottom = pt[1].y;
386 ret = RectInRegion( dc->hGCClipRgn, &tmpRect );
388 GDI_ReleaseObj( hdc );
393 /***********************************************************************
394 * GetClipBox (GDI32.@)
396 INT WINAPI GetClipBox( HDC hdc, LPRECT rect )
399 DC *dc = DC_GetDCUpdate( hdc );
400 if (!dc) return ERROR;
401 ret = GetRgnBox( dc->hGCClipRgn, rect );
402 DPtoLP( hdc, (LPPOINT)rect, 2 );
403 GDI_ReleaseObj( hdc );
408 /***********************************************************************
409 * GetClipRgn (GDI32.@)
411 INT WINAPI GetClipRgn( HDC hdc, HRGN hRgn )
415 if (hRgn && (dc = DC_GetDCPtr( hdc )))
419 if( CombineRgn(hRgn, dc->hClipRgn, 0, RGN_COPY) != ERROR ) ret = 1;
422 GDI_ReleaseObj( hdc );
427 /***********************************************************************
428 * SaveVisRgn (GDI.129)
430 HRGN16 WINAPI SaveVisRgn16( HDC16 hdc16 )
433 GDIOBJHDR *obj, *copyObj;
434 HDC hdc = HDC_32( hdc16 );
435 DC *dc = DC_GetDCUpdate( hdc );
440 if (!(obj = GDI_GetObjPtr( dc->hVisRgn, REGION_MAGIC )))
442 GDI_ReleaseObj( hdc );
445 if (!(copy = CreateRectRgn( 0, 0, 0, 0 )))
447 GDI_ReleaseObj( dc->hVisRgn );
448 GDI_ReleaseObj( hdc );
451 CombineRgn( copy, dc->hVisRgn, 0, RGN_COPY );
452 if (!(copyObj = GDI_GetObjPtr( copy, REGION_MAGIC )))
454 DeleteObject( copy );
455 GDI_ReleaseObj( dc->hVisRgn );
456 GDI_ReleaseObj( hdc );
459 copyObj->hNext = obj->hNext;
460 obj->hNext = HRGN_16(copy);
461 GDI_ReleaseObj( copy );
462 GDI_ReleaseObj( dc->hVisRgn );
463 GDI_ReleaseObj( hdc );
464 return HRGN_16(copy);
468 /***********************************************************************
469 * RestoreVisRgn (GDI.130)
471 INT16 WINAPI RestoreVisRgn16( HDC16 hdc16 )
474 GDIOBJHDR *obj, *savedObj;
475 HDC hdc = HDC_32( hdc16 );
476 DC *dc = DC_GetDCPtr( hdc );
479 if (!dc) return ERROR;
483 if (!(obj = GDI_GetObjPtr( dc->hVisRgn, REGION_MAGIC ))) goto done;
484 saved = HRGN_32(obj->hNext);
486 if ((savedObj = GDI_GetObjPtr( saved, REGION_MAGIC )))
488 ret = CombineRgn( dc->hVisRgn, saved, 0, RGN_COPY );
489 obj->hNext = savedObj->hNext;
490 GDI_ReleaseObj( saved );
491 DeleteObject( saved );
492 dc->flags &= ~DC_DIRTY;
493 CLIPPING_UpdateGCRegion( dc );
495 GDI_ReleaseObj( dc->hVisRgn );
497 GDI_ReleaseObj( hdc );