539 lines
15 KiB
C
539 lines
15 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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#include "debug.h"
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#define UPDATE_DIRTY_DC(dc) \
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do { \
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if ((dc)->hookProc && !((dc)->w.flags & (DC_SAVED | DC_MEMORY))) \
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(dc)->hookProc( (dc)->hSelf, DCHC_INVALIDVISRGN, (dc)->dwHookData, 0 ); \
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} while(0)
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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 = CreateRectRgn32( 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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UPDATE_DIRTY_DC(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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CombineRgn32( dc->w.hGCClipRgn, dc->w.hVisRgn, 0, RGN_COPY );
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else
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CombineRgn32(dc->w.hGCClipRgn, dc->w.hClipRgn, dc->w.hVisRgn, RGN_AND);
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if (dc->funcs->pSetDeviceClipping) dc->funcs->pSetDeviceClipping( dc );
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}
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/***********************************************************************
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* SelectClipRgn16 (GDI.44)
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*/
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INT16 WINAPI SelectClipRgn16( HDC16 hdc, HRGN16 hrgn )
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{
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return (INT16)SelectClipRgn32( hdc, hrgn );
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}
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/***********************************************************************
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* SelectClipRgn32 (GDI32.297)
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*/
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INT32 WINAPI SelectClipRgn32( HDC32 hdc, HRGN32 hrgn )
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{
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INT32 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 = CreateRectRgn32(0,0,0,0);
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retval = CombineRgn32( 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) DeleteObject16( 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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GDI_HEAP_UNLOCK( hdc );
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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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INT16 WINAPI SelectVisRgn( HDC16 hdc, HRGN16 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 = CombineRgn16( dc->w.hVisRgn, hrgn, 0, RGN_COPY );
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CLIPPING_UpdateGCRegion( dc );
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GDI_HEAP_UNLOCK( hdc );
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return retval;
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}
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/***********************************************************************
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* OffsetClipRgn16 (GDI.32)
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*/
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INT16 WINAPI OffsetClipRgn16( HDC16 hdc, INT16 x, INT16 y )
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{
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return (INT16)OffsetClipRgn32( hdc, x, y );
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}
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/***********************************************************************
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* OffsetClipRgn32 (GDI32.255)
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*/
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INT32 WINAPI OffsetClipRgn32( HDC32 hdc, INT32 x, INT32 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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GDI_HEAP_UNLOCK( hdc );
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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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INT32 ret = OffsetRgn32( dc->w.hClipRgn, XLPTODP(dc,x), YLPTODP(dc,y));
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CLIPPING_UpdateGCRegion( dc );
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GDI_HEAP_UNLOCK( hdc );
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return ret;
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}
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GDI_HEAP_UNLOCK( hdc );
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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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INT16 WINAPI OffsetVisRgn( HDC16 hdc, INT16 x, INT16 y )
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{
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INT16 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 = OffsetRgn32( dc->w.hVisRgn, x, y );
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CLIPPING_UpdateGCRegion( dc );
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GDI_HEAP_UNLOCK( hdc );
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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, can be called from
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* elsewhere (like ExtTextOut()) to skip redundant metafile update and
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* coordinate conversion.
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*/
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INT32 CLIPPING_IntersectClipRect( DC * dc, INT32 left, INT32 top,
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INT32 right, INT32 bottom, UINT32 flags )
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{
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HRGN32 newRgn;
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INT32 ret;
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if (!(newRgn = CreateRectRgn32( left, top, right, bottom ))) return ERROR;
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if (!dc->w.hClipRgn)
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{
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if( flags & CLIP_INTERSECT )
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{
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dc->w.hClipRgn = newRgn;
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CLIPPING_UpdateGCRegion( dc );
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}
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return SIMPLEREGION;
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}
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ret = CombineRgn32( newRgn, dc->w.hClipRgn, newRgn,
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(flags & CLIP_EXCLUDE) ? RGN_DIFF : RGN_AND );
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if (ret != ERROR)
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{
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if (!(flags & CLIP_KEEPRGN)) DeleteObject32( 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 DeleteObject32( newRgn );
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return ret;
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}
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/***********************************************************************
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* ExcludeClipRect16 (GDI.21)
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*/
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INT16 WINAPI ExcludeClipRect16( HDC16 hdc, INT16 left, INT16 top,
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INT16 right, INT16 bottom )
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{
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return (INT16)ExcludeClipRect32( hdc, left, top, right, bottom );
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}
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/***********************************************************************
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* ExcludeClipRect32 (GDI32.92)
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*/
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INT32 WINAPI ExcludeClipRect32( HDC32 hdc, INT32 left, INT32 top,
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INT32 right, INT32 bottom )
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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)
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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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GDI_HEAP_UNLOCK( hdc );
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return NULLREGION; /* ?? */
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}
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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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dprintf_clipping(stddeb, "ExcludeClipRect: %04x %dx%d,%dx%d\n",
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hdc, left, top, right, bottom );
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ret = CLIPPING_IntersectClipRect( dc, left, top, right, bottom, CLIP_EXCLUDE );
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GDI_HEAP_UNLOCK( hdc );
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return ret;
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}
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/***********************************************************************
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* IntersectClipRect16 (GDI.22)
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*/
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INT16 WINAPI IntersectClipRect16( HDC16 hdc, INT16 left, INT16 top,
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INT16 right, INT16 bottom )
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{
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return (INT16)IntersectClipRect32( hdc, left, top, right, bottom );
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}
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/***********************************************************************
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* IntersectClipRect32 (GDI32.245)
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*/
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INT32 WINAPI IntersectClipRect32( HDC32 hdc, INT32 left, INT32 top,
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INT32 right, INT32 bottom )
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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)
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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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GDI_HEAP_UNLOCK( hdc );
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return NULLREGION; /* ?? */
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}
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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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dprintf_clipping(stddeb, "IntersectClipRect: %04x %dx%d,%dx%d\n",
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hdc, left, top, right, bottom );
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ret = CLIPPING_IntersectClipRect( dc, left, top, right, bottom, CLIP_INTERSECT );
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GDI_HEAP_UNLOCK( hdc );
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return ret;
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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 INT32 CLIPPING_IntersectVisRect( DC * dc, INT32 left, INT32 top,
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INT32 right, INT32 bottom,
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BOOL32 exclude )
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{
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HRGN32 tempRgn, newRgn;
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INT32 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 = CreateRectRgn32( 0, 0, 0, 0 ))) return ERROR;
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if (!(tempRgn = CreateRectRgn32( left, top, right, bottom )))
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{
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DeleteObject32( newRgn );
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return ERROR;
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}
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ret = CombineRgn32( newRgn, dc->w.hVisRgn, tempRgn,
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exclude ? RGN_DIFF : RGN_AND );
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DeleteObject32( 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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DeleteObject32( dc->w.hVisRgn );
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dc->w.hVisRgn = newRgn;
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CLIPPING_UpdateGCRegion( dc );
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GDI_HEAP_UNLOCK( newRgn );
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}
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else DeleteObject32( 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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INT16 WINAPI ExcludeVisRect( HDC16 hdc, INT16 left, INT16 top,
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INT16 right, INT16 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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INT16 WINAPI IntersectVisRect( HDC16 hdc, INT16 left, INT16 top,
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INT16 right, INT16 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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* PtVisible16 (GDI.103)
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*/
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BOOL16 WINAPI PtVisible16( HDC16 hdc, INT16 x, INT16 y )
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{
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return PtVisible32( hdc, x, y );
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}
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/***********************************************************************
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* PtVisible32 (GDI32.279)
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*/
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BOOL32 WINAPI PtVisible32( HDC32 hdc, INT32 x, INT32 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 ) UPDATE_DIRTY_DC(dc);
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dc->w.flags &= ~DC_DIRTY;
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return PtInRegion32( 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 WINAPI 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 WINAPI 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 WINAPI 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 WINAPI 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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* GetClipRgn32 (GDI32.163)
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*/
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INT32 WINAPI GetClipRgn32( HDC32 hdc, HRGN32 hRgn )
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{
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DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
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if( dc && hRgn )
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if( dc->w.hClipRgn )
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{
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/* this assumes that dc->w.hClipRgn is in coordinates
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relative to the DC origin (not device) */
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if( CombineRgn32(hRgn, dc->w.hClipRgn, 0, RGN_COPY) != ERROR )
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return 1;
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}
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else return 0;
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return -1;
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}
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/***********************************************************************
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* SaveVisRgn (GDI.129)
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*/
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HRGN16 WINAPI SaveVisRgn( HDC16 hdc )
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{
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HRGN32 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 ) UPDATE_DIRTY_DC(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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{
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GDI_HEAP_UNLOCK( hdc );
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return 0;
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}
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if (!(copy = CreateRectRgn32( 0, 0, 0, 0 )))
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{
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GDI_HEAP_UNLOCK( dc->w.hVisRgn );
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GDI_HEAP_UNLOCK( hdc );
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return 0;
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}
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CombineRgn32( copy, dc->w.hVisRgn, 0, RGN_COPY );
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if (!(copyObj = (RGNOBJ *) GDI_GetObjPtr( copy, REGION_MAGIC )))
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{
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GDI_HEAP_UNLOCK( dc->w.hVisRgn );
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GDI_HEAP_UNLOCK( hdc );
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return 0;
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}
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copyObj->header.hNext = obj->header.hNext;
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obj->header.hNext = copy;
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GDI_HEAP_UNLOCK( dc->w.hVisRgn );
|
|
GDI_HEAP_UNLOCK( hdc );
|
|
GDI_HEAP_UNLOCK( copy );
|
|
return copy;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* RestoreVisRgn (GDI.130)
|
|
*/
|
|
INT16 WINAPI RestoreVisRgn( HDC16 hdc )
|
|
{
|
|
HRGN32 saved;
|
|
RGNOBJ *obj, *savedObj;
|
|
DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
|
|
if (!dc) return ERROR;
|
|
if (!dc->w.hVisRgn)
|
|
{
|
|
GDI_HEAP_UNLOCK( hdc );
|
|
return ERROR;
|
|
}
|
|
dprintf_clipping(stddeb, "RestoreVisRgn: %04x\n", hdc );
|
|
if (!(obj = (RGNOBJ *) GDI_GetObjPtr( dc->w.hVisRgn, REGION_MAGIC )))
|
|
{
|
|
GDI_HEAP_UNLOCK( hdc );
|
|
return ERROR;
|
|
}
|
|
if (!(saved = obj->header.hNext))
|
|
{
|
|
GDI_HEAP_UNLOCK( dc->w.hVisRgn );
|
|
GDI_HEAP_UNLOCK( hdc );
|
|
return ERROR;
|
|
}
|
|
if (!(savedObj = (RGNOBJ *) GDI_GetObjPtr( saved, REGION_MAGIC )))
|
|
{
|
|
GDI_HEAP_UNLOCK( dc->w.hVisRgn );
|
|
GDI_HEAP_UNLOCK( hdc );
|
|
return ERROR;
|
|
}
|
|
DeleteObject32( dc->w.hVisRgn );
|
|
dc->w.hVisRgn = saved;
|
|
CLIPPING_UpdateGCRegion( dc );
|
|
GDI_HEAP_UNLOCK( hdc );
|
|
GDI_HEAP_UNLOCK( saved );
|
|
return savedObj->xrgn ? COMPLEXREGION : NULLREGION;
|
|
}
|