596 lines
16 KiB
C
596 lines
16 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 <stdlib.h>
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#include "dc.h"
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#include "region.h"
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#include "debugtools.h"
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#include "wine/winuser16.h"
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DECLARE_DEBUG_CHANNEL(clipping)
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DECLARE_DEBUG_CHANNEL(region)
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#define UPDATE_DIRTY_DC(dc) \
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do { \
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if ((dc)->hookThunk && !((dc)->w.flags & (DC_SAVED | DC_MEMORY))) \
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(dc)->hookThunk( (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 = CreateRectRgn( 0, 0, 0, 0 );
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if (!dc->w.hVisRgn)
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{
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ERR_(region)("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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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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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)SelectClipRgn( 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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INT WINAPI SelectClipRgn( HDC hdc, HRGN hrgn )
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{
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return ExtSelectClipRgn( hdc, hrgn, RGN_COPY );
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}
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/******************************************************************************
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* ExtSelectClipRgn [GDI32.97]
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*/
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INT WINAPI ExtSelectClipRgn( HDC hdc, HRGN hrgn, INT fnMode )
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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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TRACE_(clipping)("%04x %04x %d\n", hdc, hrgn, fnMode );
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if (!hrgn)
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{
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if (fnMode == RGN_COPY)
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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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else
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{
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FIXME_(clipping)("Unimplemented: hrgn NULL in mode: %d\n", fnMode);
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return ERROR;
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}
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}
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else
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{
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if (!dc->w.hClipRgn)
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{
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RECT rect;
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GetRgnBox( dc->w.hVisRgn, &rect );
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dc->w.hClipRgn = CreateRectRgnIndirect( &rect );
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}
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OffsetRgn( dc->w.hClipRgn, -dc->w.DCOrgX, -dc->w.DCOrgY );
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if(fnMode == RGN_COPY)
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retval = CombineRgn( dc->w.hClipRgn, hrgn, 0, fnMode );
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else
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retval = CombineRgn( dc->w.hClipRgn, dc->w.hClipRgn, hrgn, fnMode);
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OffsetRgn( dc->w.hClipRgn, dc->w.DCOrgX, dc->w.DCOrgY );
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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 SelectVisRgn16( 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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TRACE_(clipping)("%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)OffsetClipRgn( 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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INT WINAPI OffsetClipRgn( HDC hdc, INT x, INT y )
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{
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INT ret = SIMPLEREGION;
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DC *dc = DC_GetDCPtr( hdc );
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if (!dc) return ERROR;
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TRACE_(clipping)("%04x %d,%d\n", hdc, x, y );
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if(dc->funcs->pOffsetClipRgn)
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ret = dc->funcs->pOffsetClipRgn( dc, x, y );
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else if (dc->w.hClipRgn) {
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ret = OffsetRgn( dc->w.hClipRgn, XLSTODS(dc,x), YLSTODS(dc,y));
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CLIPPING_UpdateGCRegion( dc );
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}
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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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* OffsetVisRgn (GDI.102)
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*/
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INT16 WINAPI OffsetVisRgn16( 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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TRACE_(clipping)("%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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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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INT CLIPPING_IntersectClipRect( DC * dc, INT left, INT top,
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INT right, INT bottom, UINT flags )
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{
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HRGN newRgn;
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INT ret;
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left += dc->w.DCOrgX;
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right += dc->w.DCOrgX;
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top += dc->w.DCOrgY;
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bottom += dc->w.DCOrgY;
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if (!(newRgn = CreateRectRgn( 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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return SIMPLEREGION;
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}
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else if( flags & CLIP_EXCLUDE )
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{
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dc->w.hClipRgn = CreateRectRgn( 0, 0, 0, 0 );
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CombineRgn( dc->w.hClipRgn, dc->w.hVisRgn, 0, RGN_COPY );
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}
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else WARN_(clipping)("No hClipRgn and flags are %x\n",flags);
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}
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ret = CombineRgn( 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)) 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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* 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)ExcludeClipRect( 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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INT WINAPI ExcludeClipRect( HDC hdc, INT left, INT top,
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INT right, INT bottom )
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{
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INT ret;
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DC *dc = DC_GetDCPtr( hdc );
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if (!dc) return ERROR;
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TRACE_(clipping)("%04x %dx%d,%dx%d\n",
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hdc, left, top, right, bottom );
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if(dc->funcs->pExcludeClipRect)
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ret = dc->funcs->pExcludeClipRect( dc, left, top, right, bottom );
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else {
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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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ret = CLIPPING_IntersectClipRect( dc, left, top, right, bottom, CLIP_EXCLUDE );
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}
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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)IntersectClipRect( 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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INT WINAPI IntersectClipRect( HDC hdc, INT left, INT top,
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INT right, INT bottom )
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{
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INT ret;
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DC *dc = DC_GetDCPtr( hdc );
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if (!dc) return ERROR;
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TRACE_(clipping)("%04x %dx%d,%dx%d\n",
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hdc, left, top, right, bottom );
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if(dc->funcs->pIntersectClipRect)
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ret = dc->funcs->pIntersectClipRect( dc, left, top, right, bottom );
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else {
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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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ret = CLIPPING_IntersectClipRect( dc, left, top, right, bottom, CLIP_INTERSECT );
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}
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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, 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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INT CLIPPING_IntersectVisRect( DC * dc, INT left, INT top,
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INT right, INT bottom,
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BOOL exclude )
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{
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HRGN tempRgn, newRgn;
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INT ret;
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left += dc->w.DCOrgX;
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right += dc->w.DCOrgX;
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top += dc->w.DCOrgY;
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bottom += dc->w.DCOrgY;
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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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GDI_HEAP_UNLOCK( newRgn );
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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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INT16 WINAPI ExcludeVisRect16( 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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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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TRACE_(clipping)("%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 IntersectVisRect16( 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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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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TRACE_(clipping)("%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 PtVisible( 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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BOOL WINAPI PtVisible( HDC hdc, INT x, INT 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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TRACE_(clipping)("%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 PtInRegion( dc->w.hGCClipRgn, XLPTODP(dc,x) + dc->w.DCOrgX,
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YLPTODP(dc,y) + dc->w.DCOrgY );
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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, const RECT16* 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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TRACE_(clipping)("%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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OffsetRect16( &tmpRect, dc->w.DCOrgX, dc->w.DCOrgY );
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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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BOOL WINAPI RectVisible( HDC hdc, const RECT* 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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OffsetRect16( rect, -dc->w.DCOrgX, -dc->w.DCOrgY );
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DPtoLP16( hdc, (LPPOINT16)rect, 2 );
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TRACE_(clipping)("%d,%d-%d,%d\n",
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rect->left,rect->top,rect->right,rect->bottom );
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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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INT WINAPI GetClipBox( HDC hdc, LPRECT 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 = GetRgnBox( dc->w.hGCClipRgn, rect );
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OffsetRect( rect, -dc->w.DCOrgX, -dc->w.DCOrgY );
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DPtoLP( hdc, (LPPOINT)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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INT WINAPI GetClipRgn( HDC hdc, HRGN 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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{
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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 device (not DC origin) */
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if( CombineRgn(hRgn, dc->w.hClipRgn, 0, RGN_COPY) != ERROR )
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{
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OffsetRgn( hRgn, -dc->w.DCOrgX, -dc->w.DCOrgY );
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return 1;
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}
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}
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else return 0;
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}
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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 SaveVisRgn16( HDC16 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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TRACE_(clipping)("%04x\n", hdc );
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if (!dc->w.hVisRgn)
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{
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ERR_(region)("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 = CreateRectRgn( 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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CombineRgn( 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 );
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GDI_HEAP_UNLOCK( hdc );
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GDI_HEAP_UNLOCK( 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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INT16 WINAPI RestoreVisRgn16( HDC16 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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INT16 ret;
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if (!dc) return ERROR;
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if (!dc->w.hVisRgn)
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{
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GDI_HEAP_UNLOCK( hdc );
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return ERROR;
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}
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TRACE_(clipping)("%04x\n", hdc );
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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 ERROR;
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}
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if (!(saved = obj->header.hNext))
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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 ERROR;
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}
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if (!(savedObj = (RGNOBJ *) GDI_GetObjPtr( saved, 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 ERROR;
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}
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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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GDI_HEAP_UNLOCK( hdc );
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ret = savedObj->rgn->type; /* FIXME */
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GDI_HEAP_UNLOCK( saved );
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return ret;
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}
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