| /* |
| * DC clipping functions |
| * |
| * Copyright 1993 Alexandre Julliard |
| */ |
| |
| #include <stdio.h> |
| #include "dc.h" |
| #include "metafile.h" |
| #include "region.h" |
| #include "stddebug.h" |
| #include "debug.h" |
| |
| #define UPDATE_DIRTY_DC(dc) \ |
| do { \ |
| if ((dc)->hookProc && !((dc)->w.flags & (DC_SAVED | DC_MEMORY))) \ |
| (dc)->hookProc( (dc)->hSelf, DCHC_INVALIDVISRGN, (dc)->dwHookData, 0 ); \ |
| } while(0) |
| |
| |
| |
| /*********************************************************************** |
| * CLIPPING_UpdateGCRegion |
| * |
| * Update the GC clip region when the ClipRgn or VisRgn have changed. |
| */ |
| void CLIPPING_UpdateGCRegion( DC * dc ) |
| { |
| if (!dc->w.hGCClipRgn) dc->w.hGCClipRgn = CreateRectRgn32( 0, 0, 0, 0 ); |
| |
| if (!dc->w.hVisRgn) |
| { |
| fprintf( stderr, "UpdateGCRegion: hVisRgn is zero. Please report this.\n" ); |
| exit(1); |
| } |
| |
| if (dc->w.flags & DC_DIRTY) |
| { |
| UPDATE_DIRTY_DC(dc); |
| dc->w.flags &= ~DC_DIRTY; |
| } |
| |
| if (!dc->w.hClipRgn) |
| CombineRgn32( dc->w.hGCClipRgn, dc->w.hVisRgn, 0, RGN_COPY ); |
| else |
| CombineRgn32(dc->w.hGCClipRgn, dc->w.hClipRgn, dc->w.hVisRgn, RGN_AND); |
| if (dc->funcs->pSetDeviceClipping) dc->funcs->pSetDeviceClipping( dc ); |
| } |
| |
| |
| /*********************************************************************** |
| * SelectClipRgn16 (GDI.44) |
| */ |
| INT16 WINAPI SelectClipRgn16( HDC16 hdc, HRGN16 hrgn ) |
| { |
| return (INT16)SelectClipRgn32( hdc, hrgn ); |
| } |
| |
| |
| /*********************************************************************** |
| * SelectClipRgn32 (GDI32.297) |
| */ |
| INT32 WINAPI SelectClipRgn32( HDC32 hdc, HRGN32 hrgn ) |
| { |
| INT32 retval; |
| DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC ); |
| if (!dc) return ERROR; |
| |
| dprintf_clipping(stddeb, "SelectClipRgn: %04x %04x\n", hdc, hrgn ); |
| |
| if (hrgn) |
| { |
| if (!dc->w.hClipRgn) dc->w.hClipRgn = CreateRectRgn32(0,0,0,0); |
| retval = CombineRgn32( dc->w.hClipRgn, hrgn, 0, RGN_COPY ); |
| } |
| else |
| { |
| if (dc->w.hClipRgn) DeleteObject16( dc->w.hClipRgn ); |
| dc->w.hClipRgn = 0; |
| retval = SIMPLEREGION; /* Clip region == whole DC */ |
| } |
| |
| CLIPPING_UpdateGCRegion( dc ); |
| GDI_HEAP_UNLOCK( hdc ); |
| return retval; |
| } |
| |
| |
| /*********************************************************************** |
| * SelectVisRgn (GDI.105) |
| */ |
| INT16 WINAPI SelectVisRgn( HDC16 hdc, HRGN16 hrgn ) |
| { |
| int retval; |
| DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC ); |
| if (!dc || !hrgn) return ERROR; |
| |
| dprintf_clipping(stddeb, "SelectVisRgn: %04x %04x\n", hdc, hrgn ); |
| |
| dc->w.flags &= ~DC_DIRTY; |
| |
| retval = CombineRgn16( dc->w.hVisRgn, hrgn, 0, RGN_COPY ); |
| CLIPPING_UpdateGCRegion( dc ); |
| GDI_HEAP_UNLOCK( hdc ); |
| return retval; |
| } |
| |
| |
| /*********************************************************************** |
| * OffsetClipRgn16 (GDI.32) |
| */ |
| INT16 WINAPI OffsetClipRgn16( HDC16 hdc, INT16 x, INT16 y ) |
| { |
| return (INT16)OffsetClipRgn32( hdc, x, y ); |
| } |
| |
| |
| /*********************************************************************** |
| * OffsetClipRgn32 (GDI32.255) |
| */ |
| INT32 WINAPI OffsetClipRgn32( HDC32 hdc, INT32 x, INT32 y ) |
| { |
| DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC ); |
| if (!dc) |
| { |
| dc = (DC *)GDI_GetObjPtr(hdc, METAFILE_DC_MAGIC); |
| if (!dc) return ERROR; |
| MF_MetaParam2(dc, META_OFFSETCLIPRGN, x, y); |
| GDI_HEAP_UNLOCK( hdc ); |
| return NULLREGION; /* ?? */ |
| } |
| |
| dprintf_clipping(stddeb, "OffsetClipRgn: %04x %d,%d\n", hdc, x, y ); |
| |
| if (dc->w.hClipRgn) |
| { |
| INT32 ret = OffsetRgn32( dc->w.hClipRgn, XLPTODP(dc,x), YLPTODP(dc,y)); |
| CLIPPING_UpdateGCRegion( dc ); |
| GDI_HEAP_UNLOCK( hdc ); |
| return ret; |
| } |
| GDI_HEAP_UNLOCK( hdc ); |
| return SIMPLEREGION; /* Clip region == client area */ |
| } |
| |
| |
| /*********************************************************************** |
| * OffsetVisRgn (GDI.102) |
| */ |
| INT16 WINAPI OffsetVisRgn( HDC16 hdc, INT16 x, INT16 y ) |
| { |
| INT16 retval; |
| DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC ); |
| if (!dc) return ERROR; |
| dprintf_clipping(stddeb, "OffsetVisRgn: %04x %d,%d\n", hdc, x, y ); |
| retval = OffsetRgn32( dc->w.hVisRgn, x, y ); |
| CLIPPING_UpdateGCRegion( dc ); |
| GDI_HEAP_UNLOCK( hdc ); |
| return retval; |
| } |
| |
| |
| /*********************************************************************** |
| * CLIPPING_IntersectClipRect |
| * |
| * Helper function for {Intersect,Exclude}ClipRect, can be called from |
| * elsewhere (like ExtTextOut()) to skip redundant metafile update and |
| * coordinate conversion. |
| */ |
| INT32 CLIPPING_IntersectClipRect( DC * dc, INT32 left, INT32 top, |
| INT32 right, INT32 bottom, UINT32 flags ) |
| { |
| HRGN32 newRgn; |
| INT32 ret; |
| |
| if (!(newRgn = CreateRectRgn32( left, top, right, bottom ))) return ERROR; |
| if (!dc->w.hClipRgn) |
| { |
| if( flags & CLIP_INTERSECT ) |
| { |
| dc->w.hClipRgn = newRgn; |
| CLIPPING_UpdateGCRegion( dc ); |
| } |
| return SIMPLEREGION; |
| } |
| |
| ret = CombineRgn32( newRgn, dc->w.hClipRgn, newRgn, |
| (flags & CLIP_EXCLUDE) ? RGN_DIFF : RGN_AND ); |
| if (ret != ERROR) |
| { |
| if (!(flags & CLIP_KEEPRGN)) DeleteObject32( dc->w.hClipRgn ); |
| dc->w.hClipRgn = newRgn; |
| CLIPPING_UpdateGCRegion( dc ); |
| } |
| else DeleteObject32( newRgn ); |
| return ret; |
| } |
| |
| |
| /*********************************************************************** |
| * ExcludeClipRect16 (GDI.21) |
| */ |
| INT16 WINAPI ExcludeClipRect16( HDC16 hdc, INT16 left, INT16 top, |
| INT16 right, INT16 bottom ) |
| { |
| return (INT16)ExcludeClipRect32( hdc, left, top, right, bottom ); |
| } |
| |
| |
| /*********************************************************************** |
| * ExcludeClipRect32 (GDI32.92) |
| */ |
| INT32 WINAPI ExcludeClipRect32( HDC32 hdc, INT32 left, INT32 top, |
| INT32 right, INT32 bottom ) |
| { |
| INT32 ret; |
| DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC ); |
| if (!dc) |
| { |
| dc = (DC *)GDI_GetObjPtr(hdc, METAFILE_DC_MAGIC); |
| if (!dc) return ERROR; |
| MF_MetaParam4(dc, META_EXCLUDECLIPRECT, left, top, right, bottom); |
| GDI_HEAP_UNLOCK( hdc ); |
| return NULLREGION; /* ?? */ |
| } |
| |
| left = XLPTODP( dc, left ); |
| right = XLPTODP( dc, right ); |
| top = YLPTODP( dc, top ); |
| bottom = YLPTODP( dc, bottom ); |
| |
| dprintf_clipping(stddeb, "ExcludeClipRect: %04x %dx%d,%dx%d\n", |
| hdc, left, top, right, bottom ); |
| ret = CLIPPING_IntersectClipRect( dc, left, top, right, bottom, CLIP_EXCLUDE ); |
| GDI_HEAP_UNLOCK( hdc ); |
| return ret; |
| } |
| |
| |
| /*********************************************************************** |
| * IntersectClipRect16 (GDI.22) |
| */ |
| INT16 WINAPI IntersectClipRect16( HDC16 hdc, INT16 left, INT16 top, |
| INT16 right, INT16 bottom ) |
| { |
| return (INT16)IntersectClipRect32( hdc, left, top, right, bottom ); |
| } |
| |
| |
| /*********************************************************************** |
| * IntersectClipRect32 (GDI32.245) |
| */ |
| INT32 WINAPI IntersectClipRect32( HDC32 hdc, INT32 left, INT32 top, |
| INT32 right, INT32 bottom ) |
| { |
| INT32 ret; |
| DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC ); |
| if (!dc) |
| { |
| dc = (DC *)GDI_GetObjPtr(hdc, METAFILE_DC_MAGIC); |
| if (!dc) return ERROR; |
| MF_MetaParam4(dc, META_INTERSECTCLIPRECT, left, top, right, bottom); |
| GDI_HEAP_UNLOCK( hdc ); |
| return NULLREGION; /* ?? */ |
| } |
| |
| left = XLPTODP( dc, left ); |
| right = XLPTODP( dc, right ); |
| top = YLPTODP( dc, top ); |
| bottom = YLPTODP( dc, bottom ); |
| |
| dprintf_clipping(stddeb, "IntersectClipRect: %04x %dx%d,%dx%d\n", |
| hdc, left, top, right, bottom ); |
| ret = CLIPPING_IntersectClipRect( dc, left, top, right, bottom, CLIP_INTERSECT ); |
| GDI_HEAP_UNLOCK( hdc ); |
| return ret; |
| } |
| |
| |
| /*********************************************************************** |
| * CLIPPING_IntersectVisRect |
| * |
| * Helper function for {Intersect,Exclude}VisRect |
| */ |
| static INT32 CLIPPING_IntersectVisRect( DC * dc, INT32 left, INT32 top, |
| INT32 right, INT32 bottom, |
| BOOL32 exclude ) |
| { |
| HRGN32 tempRgn, newRgn; |
| INT32 ret; |
| |
| left = XLPTODP( dc, left ); |
| right = XLPTODP( dc, right ); |
| top = YLPTODP( dc, top ); |
| bottom = YLPTODP( dc, bottom ); |
| |
| if (!(newRgn = CreateRectRgn32( 0, 0, 0, 0 ))) return ERROR; |
| if (!(tempRgn = CreateRectRgn32( left, top, right, bottom ))) |
| { |
| DeleteObject32( newRgn ); |
| return ERROR; |
| } |
| ret = CombineRgn32( newRgn, dc->w.hVisRgn, tempRgn, |
| exclude ? RGN_DIFF : RGN_AND ); |
| DeleteObject32( tempRgn ); |
| |
| if (ret != ERROR) |
| { |
| RGNOBJ *newObj = (RGNOBJ*)GDI_GetObjPtr( newRgn, REGION_MAGIC); |
| RGNOBJ *prevObj = (RGNOBJ*)GDI_GetObjPtr( dc->w.hVisRgn, REGION_MAGIC); |
| if (newObj && prevObj) newObj->header.hNext = prevObj->header.hNext; |
| DeleteObject32( dc->w.hVisRgn ); |
| dc->w.hVisRgn = newRgn; |
| CLIPPING_UpdateGCRegion( dc ); |
| GDI_HEAP_UNLOCK( newRgn ); |
| } |
| else DeleteObject32( newRgn ); |
| return ret; |
| } |
| |
| |
| /*********************************************************************** |
| * ExcludeVisRect (GDI.73) |
| */ |
| INT16 WINAPI ExcludeVisRect( HDC16 hdc, INT16 left, INT16 top, |
| INT16 right, INT16 bottom ) |
| { |
| DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC ); |
| if (!dc) return ERROR; |
| dprintf_clipping(stddeb, "ExcludeVisRect: %04x %dx%d,%dx%d\n", |
| hdc, left, top, right, bottom ); |
| |
| return CLIPPING_IntersectVisRect( dc, left, top, right, bottom, TRUE ); |
| } |
| |
| |
| /*********************************************************************** |
| * IntersectVisRect (GDI.98) |
| */ |
| INT16 WINAPI IntersectVisRect( HDC16 hdc, INT16 left, INT16 top, |
| INT16 right, INT16 bottom ) |
| { |
| DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC ); |
| if (!dc) return ERROR; |
| dprintf_clipping(stddeb, "IntersectVisRect: %04x %dx%d,%dx%d\n", |
| hdc, left, top, right, bottom ); |
| |
| return CLIPPING_IntersectVisRect( dc, left, top, right, bottom, FALSE ); |
| } |
| |
| |
| /*********************************************************************** |
| * PtVisible16 (GDI.103) |
| */ |
| BOOL16 WINAPI PtVisible16( HDC16 hdc, INT16 x, INT16 y ) |
| { |
| return PtVisible32( hdc, x, y ); |
| } |
| |
| |
| /*********************************************************************** |
| * PtVisible32 (GDI32.279) |
| */ |
| BOOL32 WINAPI PtVisible32( HDC32 hdc, INT32 x, INT32 y ) |
| { |
| DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC ); |
| if (!dc) return ERROR; |
| |
| dprintf_clipping(stddeb, "PtVisible: %04x %d,%d\n", hdc, x, y ); |
| if (!dc->w.hGCClipRgn) return FALSE; |
| |
| if( dc->w.flags & DC_DIRTY ) UPDATE_DIRTY_DC(dc); |
| dc->w.flags &= ~DC_DIRTY; |
| |
| return PtInRegion32( dc->w.hGCClipRgn, XLPTODP(dc,x), YLPTODP(dc,y) ); |
| } |
| |
| |
| /*********************************************************************** |
| * RectVisible16 (GDI.104) |
| */ |
| BOOL16 WINAPI RectVisible16( HDC16 hdc, LPRECT16 rect ) |
| { |
| RECT16 tmpRect; |
| DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC ); |
| if (!dc) return FALSE; |
| dprintf_clipping(stddeb,"RectVisible: %04x %d,%dx%d,%d\n", |
| hdc, rect->left, rect->top, rect->right, rect->bottom ); |
| if (!dc->w.hGCClipRgn) return FALSE; |
| /* copy rectangle to avoid overwriting by LPtoDP */ |
| tmpRect = *rect; |
| LPtoDP16( hdc, (LPPOINT16)&tmpRect, 2 ); |
| return RectInRegion16( dc->w.hGCClipRgn, &tmpRect ); |
| } |
| |
| |
| /*********************************************************************** |
| * RectVisible32 (GDI32.282) |
| */ |
| BOOL32 WINAPI RectVisible32( HDC32 hdc, LPRECT32 rect ) |
| { |
| RECT16 rect16; |
| CONV_RECT32TO16( rect, &rect16 ); |
| return RectVisible16( (HDC16)hdc, &rect16 ); |
| } |
| |
| |
| /*********************************************************************** |
| * GetClipBox16 (GDI.77) |
| */ |
| INT16 WINAPI GetClipBox16( HDC16 hdc, LPRECT16 rect ) |
| { |
| int ret; |
| DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC ); |
| if (!dc) return ERROR; |
| ret = GetRgnBox16( dc->w.hGCClipRgn, rect ); |
| DPtoLP16( hdc, (LPPOINT16)rect, 2 ); |
| return ret; |
| } |
| |
| |
| /*********************************************************************** |
| * GetClipBox32 (GDI32.162) |
| */ |
| INT32 WINAPI GetClipBox32( HDC32 hdc, LPRECT32 rect ) |
| { |
| INT32 ret; |
| DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC ); |
| if (!dc) return ERROR; |
| ret = GetRgnBox32( dc->w.hGCClipRgn, rect ); |
| DPtoLP32( hdc, (LPPOINT32)rect, 2 ); |
| return ret; |
| } |
| |
| |
| /*********************************************************************** |
| * GetClipRgn32 (GDI32.163) |
| */ |
| INT32 WINAPI GetClipRgn32( HDC32 hdc, HRGN32 hRgn ) |
| { |
| DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC ); |
| if( dc && hRgn ) |
| if( dc->w.hClipRgn ) |
| { |
| /* this assumes that dc->w.hClipRgn is in coordinates |
| relative to the DC origin (not device) */ |
| |
| if( CombineRgn32(hRgn, dc->w.hClipRgn, 0, RGN_COPY) != ERROR ) |
| return 1; |
| } |
| else return 0; |
| return -1; |
| } |
| |
| /*********************************************************************** |
| * SaveVisRgn (GDI.129) |
| */ |
| HRGN16 WINAPI SaveVisRgn( HDC16 hdc ) |
| { |
| HRGN32 copy; |
| RGNOBJ *obj, *copyObj; |
| DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC ); |
| if (!dc) return 0; |
| dprintf_clipping(stddeb, "SaveVisRgn: %04x\n", hdc ); |
| if (!dc->w.hVisRgn) |
| { |
| fprintf( stderr, "SaveVisRgn: hVisRgn is zero. Please report this.\n" ); |
| exit(1); |
| } |
| if( dc->w.flags & DC_DIRTY ) UPDATE_DIRTY_DC(dc); |
| dc->w.flags &= ~DC_DIRTY; |
| |
| if (!(obj = (RGNOBJ *) GDI_GetObjPtr( dc->w.hVisRgn, REGION_MAGIC ))) |
| { |
| GDI_HEAP_UNLOCK( hdc ); |
| return 0; |
| } |
| if (!(copy = CreateRectRgn32( 0, 0, 0, 0 ))) |
| { |
| GDI_HEAP_UNLOCK( dc->w.hVisRgn ); |
| GDI_HEAP_UNLOCK( hdc ); |
| return 0; |
| } |
| CombineRgn32( copy, dc->w.hVisRgn, 0, RGN_COPY ); |
| if (!(copyObj = (RGNOBJ *) GDI_GetObjPtr( copy, REGION_MAGIC ))) |
| { |
| GDI_HEAP_UNLOCK( dc->w.hVisRgn ); |
| GDI_HEAP_UNLOCK( hdc ); |
| return 0; |
| } |
| copyObj->header.hNext = obj->header.hNext; |
| obj->header.hNext = copy; |
| 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 ); |
| INT16 ret; |
| |
| 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 ); |
| ret = savedObj->rgn->type; /* FIXME */ |
| GDI_HEAP_UNLOCK( saved ); |
| return ret; |
| } |