432 lines
12 KiB
C
432 lines
12 KiB
C
/*
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* DC clipping functions
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*
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* Copyright 1993 Alexandre Julliard
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*/
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#include <stdio.h>
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#include "dc.h"
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#include "metafile.h"
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#include "region.h"
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#include "stddebug.h"
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/* #define DEBUG_CLIPPING */
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#include "debug.h"
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#define UpdateDirtyDC(dc) DC_CallHookProc( dc, DCHC_INVALIDVISRGN, 0 )
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/***********************************************************************
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* CLIPPING_SetDeviceClipping
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*
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* Set the clip region of the physical device.
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*/
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static void CLIPPING_SetDeviceClipping( DC * dc )
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{
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RGNOBJ *obj = (RGNOBJ *) GDI_GetObjPtr(dc->w.hGCClipRgn, REGION_MAGIC);
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if (!obj)
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{
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fprintf( stderr, "SetDeviceClipping: Rgn is 0. Please report this.\n");
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exit(1);
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}
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if (obj->xrgn)
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{
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XSetRegion( display, dc->u.x.gc, obj->xrgn );
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XSetClipOrigin( display, dc->u.x.gc, dc->w.DCOrgX, dc->w.DCOrgY );
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}
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else /* Clip everything */
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{
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XSetClipRectangles( display, dc->u.x.gc, 0, 0, NULL, 0, 0 );
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}
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}
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/***********************************************************************
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* CLIPPING_UpdateGCRegion
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*
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* Update the GC clip region when the ClipRgn or VisRgn have changed.
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*/
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void CLIPPING_UpdateGCRegion( DC * dc )
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{
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if (!dc->w.hGCClipRgn) dc->w.hGCClipRgn = CreateRectRgn( 0, 0, 0, 0 );
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if (!dc->w.hVisRgn)
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{
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fprintf( stderr, "UpdateGCRegion: hVisRgn is zero. Please report this.\n" );
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exit(1);
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}
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if (dc->w.flags & DC_DIRTY)
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{
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UpdateDirtyDC(dc);
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dc->w.flags &= ~DC_DIRTY;
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}
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if (!dc->w.hClipRgn)
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CombineRgn( dc->w.hGCClipRgn, dc->w.hVisRgn, 0, RGN_COPY );
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else
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CombineRgn( dc->w.hGCClipRgn, dc->w.hClipRgn, dc->w.hVisRgn, RGN_AND );
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CLIPPING_SetDeviceClipping( dc );
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}
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/***********************************************************************
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* SelectClipRgn (GDI.44)
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*/
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int SelectClipRgn( HDC hdc, HRGN hrgn )
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{
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int retval;
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DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
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if (!dc) return ERROR;
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dprintf_clipping(stddeb, "SelectClipRgn: %04x %04x\n", hdc, hrgn );
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if (hrgn)
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{
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if (!dc->w.hClipRgn) dc->w.hClipRgn = CreateRectRgn(0,0,0,0);
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retval = CombineRgn( dc->w.hClipRgn, hrgn, 0, RGN_COPY );
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}
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else
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{
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if (dc->w.hClipRgn) DeleteObject( dc->w.hClipRgn );
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dc->w.hClipRgn = 0;
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retval = SIMPLEREGION; /* Clip region == whole DC */
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}
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CLIPPING_UpdateGCRegion( dc );
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return retval;
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}
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/***********************************************************************
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* SelectVisRgn (GDI.105)
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*/
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int SelectVisRgn( HDC hdc, HRGN hrgn )
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{
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int retval;
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DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
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if (!dc || !hrgn) return ERROR;
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dprintf_clipping(stddeb, "SelectVisRgn: %04x %04x\n", hdc, hrgn );
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dc->w.flags &= ~DC_DIRTY;
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retval = CombineRgn( dc->w.hVisRgn, hrgn, 0, RGN_COPY );
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CLIPPING_UpdateGCRegion( dc );
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return retval;
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}
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/***********************************************************************
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* OffsetClipRgn (GDI.32)
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*/
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int OffsetClipRgn( HDC hdc, short x, short y )
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{
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DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
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if (!dc)
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{
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dc = (DC *)GDI_GetObjPtr(hdc, METAFILE_DC_MAGIC);
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if (!dc) return ERROR;
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MF_MetaParam2(dc, META_OFFSETCLIPRGN, x, y);
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return NULLREGION; /* ?? */
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}
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dprintf_clipping(stddeb, "OffsetClipRgn: %04x %d,%d\n", hdc, x, y );
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if (dc->w.hClipRgn)
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{
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int retval = OffsetRgn( dc->w.hClipRgn, XLPTODP(dc,x), YLPTODP(dc,y) );
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CLIPPING_UpdateGCRegion( dc );
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return retval;
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}
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else return SIMPLEREGION; /* Clip region == client area */
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}
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/***********************************************************************
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* OffsetVisRgn (GDI.102)
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*/
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int OffsetVisRgn( HDC hdc, short x, short y )
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{
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int retval;
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DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
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if (!dc) return ERROR;
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dprintf_clipping(stddeb, "OffsetVisRgn: %04x %d,%d\n", hdc, x, y );
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retval = OffsetRgn( dc->w.hVisRgn, x, y );
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CLIPPING_UpdateGCRegion( dc );
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return retval;
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}
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/***********************************************************************
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* CLIPPING_IntersectClipRect
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*
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* Helper function for {Intersect,Exclude}ClipRect
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*/
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static int CLIPPING_IntersectClipRect( DC * dc, short left, short top,
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short right, short bottom, BOOL exclude)
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{
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HRGN tempRgn, newRgn;
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int ret;
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left = XLPTODP( dc, left );
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right = XLPTODP( dc, right );
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top = YLPTODP( dc, top );
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bottom = YLPTODP( dc, bottom );
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if (!(newRgn = CreateRectRgn( 0, 0, 0, 0 ))) return ERROR;
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if (!(tempRgn = CreateRectRgn( left, top, right, bottom )))
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{
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DeleteObject( newRgn );
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return ERROR;
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}
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ret = CombineRgn( newRgn, dc->w.hClipRgn ? dc->w.hClipRgn : dc->w.hVisRgn,
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tempRgn, exclude ? RGN_DIFF : RGN_AND);
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DeleteObject( tempRgn );
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if (ret != ERROR)
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{
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if (dc->w.hClipRgn) DeleteObject( dc->w.hClipRgn );
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dc->w.hClipRgn = newRgn;
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CLIPPING_UpdateGCRegion( dc );
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}
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else DeleteObject( newRgn );
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return ret;
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}
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/***********************************************************************
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* ExcludeClipRect (GDI.21)
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*/
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int ExcludeClipRect( HDC hdc, short left, short top,
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short right, short bottom )
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{
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DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
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if (!dc)
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{
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dc = (DC *)GDI_GetObjPtr(hdc, METAFILE_DC_MAGIC);
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if (!dc) return ERROR;
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MF_MetaParam4(dc, META_EXCLUDECLIPRECT, left, top, right, bottom);
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return NULLREGION; /* ?? */
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}
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dprintf_clipping(stddeb, "ExcludeClipRect: %04x %dx%d,%dx%d\n",
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hdc, left, top, right, bottom );
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return CLIPPING_IntersectClipRect( dc, left, top, right, bottom, TRUE );
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}
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/***********************************************************************
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* IntersectClipRect (GDI.22)
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*/
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int IntersectClipRect( HDC hdc, short left, short top,
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short right, short bottom )
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{
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DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
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if (!dc)
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{
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dc = (DC *)GDI_GetObjPtr(hdc, METAFILE_DC_MAGIC);
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if (!dc) return ERROR;
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MF_MetaParam4(dc, META_INTERSECTCLIPRECT, left, top, right, bottom);
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return NULLREGION; /* ?? */
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}
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dprintf_clipping(stddeb, "IntersectClipRect: %04x %dx%d,%dx%d\n",
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hdc, left, top, right, bottom );
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return CLIPPING_IntersectClipRect( dc, left, top, right, bottom, FALSE );
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}
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/***********************************************************************
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* CLIPPING_IntersectVisRect
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*
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* Helper function for {Intersect,Exclude}VisRect
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*/
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static int CLIPPING_IntersectVisRect( DC * dc, short left, short top,
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short right, short bottom, BOOL exclude )
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{
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HRGN tempRgn, newRgn;
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int ret;
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left = XLPTODP( dc, left );
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right = XLPTODP( dc, right );
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top = YLPTODP( dc, top );
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bottom = YLPTODP( dc, bottom );
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if (!(newRgn = CreateRectRgn( 0, 0, 0, 0 ))) return ERROR;
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if (!(tempRgn = CreateRectRgn( left, top, right, bottom )))
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{
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DeleteObject( newRgn );
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return ERROR;
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}
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ret = CombineRgn( newRgn, dc->w.hVisRgn, tempRgn,
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exclude ? RGN_DIFF : RGN_AND);
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DeleteObject( tempRgn );
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if (ret != ERROR)
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{
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RGNOBJ *newObj = (RGNOBJ*)GDI_GetObjPtr( newRgn, REGION_MAGIC);
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RGNOBJ *prevObj = (RGNOBJ*)GDI_GetObjPtr( dc->w.hVisRgn, REGION_MAGIC);
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if (newObj && prevObj) newObj->header.hNext = prevObj->header.hNext;
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DeleteObject( dc->w.hVisRgn );
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dc->w.hVisRgn = newRgn;
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CLIPPING_UpdateGCRegion( dc );
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}
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else DeleteObject( newRgn );
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return ret;
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}
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/***********************************************************************
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* ExcludeVisRect (GDI.73)
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*/
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int ExcludeVisRect( HDC hdc, short left, short top, short right, short bottom )
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{
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DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
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if (!dc) return ERROR;
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dprintf_clipping(stddeb, "ExcludeVisRect: %04x %dx%d,%dx%d\n",
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hdc, left, top, right, bottom );
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return CLIPPING_IntersectVisRect( dc, left, top, right, bottom, TRUE );
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}
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/***********************************************************************
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* IntersectVisRect (GDI.98)
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*/
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int IntersectVisRect( HDC hdc, short left, short top,
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short right, short bottom )
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{
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DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
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if (!dc) return ERROR;
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dprintf_clipping(stddeb, "IntersectVisRect: %04x %dx%d,%dx%d\n",
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hdc, left, top, right, bottom );
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return CLIPPING_IntersectVisRect( dc, left, top, right, bottom, FALSE );
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}
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/***********************************************************************
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* PtVisible (GDI.103)
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*/
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BOOL PtVisible( HDC hdc, short x, short y )
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{
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DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
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if (!dc) return ERROR;
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dprintf_clipping(stddeb, "PtVisible: %04x %d,%d\n", hdc, x, y );
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if (!dc->w.hGCClipRgn) return FALSE;
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if( dc->w.flags & DC_DIRTY ) UpdateDirtyDC(dc);
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dc->w.flags &= ~DC_DIRTY;
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return PtInRegion( dc->w.hGCClipRgn, XLPTODP(dc,x), YLPTODP(dc,y) );
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}
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/***********************************************************************
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* RectVisible16 (GDI.104)
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*/
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BOOL16 RectVisible16( HDC16 hdc, LPRECT16 rect )
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{
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RECT16 tmpRect;
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DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
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if (!dc) return FALSE;
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dprintf_clipping(stddeb,"RectVisible: %04x %d,%dx%d,%d\n",
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hdc, rect->left, rect->top, rect->right, rect->bottom );
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if (!dc->w.hGCClipRgn) return FALSE;
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/* copy rectangle to avoid overwriting by LPtoDP */
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tmpRect = *rect;
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LPtoDP16( hdc, (LPPOINT16)&tmpRect, 2 );
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return RectInRegion16( dc->w.hGCClipRgn, &tmpRect );
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}
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/***********************************************************************
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* RectVisible32 (GDI32.282)
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*/
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BOOL32 RectVisible32( HDC32 hdc, LPRECT32 rect )
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{
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RECT16 rect16;
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CONV_RECT32TO16( rect, &rect16 );
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return RectVisible16( (HDC16)hdc, &rect16 );
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}
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/***********************************************************************
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* GetClipBox16 (GDI.77)
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*/
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INT16 GetClipBox16( HDC16 hdc, LPRECT16 rect )
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{
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int ret;
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DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
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if (!dc) return ERROR;
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ret = GetRgnBox16( dc->w.hGCClipRgn, rect );
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DPtoLP16( hdc, (LPPOINT16)rect, 2 );
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return ret;
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}
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/***********************************************************************
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* GetClipBox32 (GDI32.162)
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*/
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INT32 GetClipBox32( HDC32 hdc, LPRECT32 rect )
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{
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INT32 ret;
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DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
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if (!dc) return ERROR;
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ret = GetRgnBox32( dc->w.hGCClipRgn, rect );
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DPtoLP32( hdc, (LPPOINT32)rect, 2 );
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return ret;
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}
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/***********************************************************************
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* SaveVisRgn (GDI.129)
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*/
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HRGN SaveVisRgn( HDC hdc )
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{
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HRGN copy;
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RGNOBJ *obj, *copyObj;
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DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
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if (!dc) return 0;
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dprintf_clipping(stddeb, "SaveVisRgn: %04x\n", hdc );
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if (!dc->w.hVisRgn)
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{
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fprintf( stderr, "SaveVisRgn: hVisRgn is zero. Please report this.\n" );
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exit(1);
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}
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if( dc->w.flags & DC_DIRTY ) UpdateDirtyDC(dc);
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dc->w.flags &= ~DC_DIRTY;
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if (!(obj = (RGNOBJ *) GDI_GetObjPtr( dc->w.hVisRgn, REGION_MAGIC )))
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return 0;
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if (!(copy = CreateRectRgn( 0, 0, 0, 0 ))) return 0;
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CombineRgn( copy, dc->w.hVisRgn, 0, RGN_COPY );
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if (!(copyObj = (RGNOBJ *) GDI_GetObjPtr( copy, REGION_MAGIC )))
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return 0;
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copyObj->header.hNext = obj->header.hNext;
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obj->header.hNext = copy;
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return copy;
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}
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/***********************************************************************
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* RestoreVisRgn (GDI.130)
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*/
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int RestoreVisRgn( HDC hdc )
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{
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HRGN saved;
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RGNOBJ *obj, *savedObj;
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DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
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if (!dc || !dc->w.hVisRgn) return ERROR;
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dprintf_clipping(stddeb, "RestoreVisRgn: %04x\n", hdc );
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if (!(obj = (RGNOBJ *) GDI_GetObjPtr( dc->w.hVisRgn, REGION_MAGIC )))
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return ERROR;
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if (!(saved = obj->header.hNext)) return ERROR;
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if (!(savedObj = (RGNOBJ *) GDI_GetObjPtr( saved, REGION_MAGIC )))
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return ERROR;
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DeleteObject( dc->w.hVisRgn );
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dc->w.hVisRgn = saved;
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CLIPPING_UpdateGCRegion( dc );
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return savedObj->xrgn ? COMPLEXREGION : NULLREGION;
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}
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