// $Id: gclips.h 751 2006-03-31 15:43:49Z alex $ /* @@tag:xara-cn@@ DO NOT MODIFY THIS LINE ================================XARAHEADERSTART=========================== Xara LX, a vector drawing and manipulation program. Copyright (C) 1993-2006 Xara Group Ltd. Copyright on certain contributions may be held in joint with their respective authors. See AUTHORS file for details. LICENSE TO USE AND MODIFY SOFTWARE ---------------------------------- This file is part of Xara LX. Xara LX is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License version 2 as published by the Free Software Foundation. Xara LX and its component source files are distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. 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Xara Group Ltd, Gaddesden Place, Hemel Hempstead, HP2 6EX, UK. http://www.xara.com/ =================================XARAHEADEREND============================ */ // Gavin's path clipping code ///////////////////////////////////////////////////////////////////////////////////////////////// // // GClipS.h // ///////////////////////////////////////////////////////////////////////////////////////////////// const UINT32 CLIPPING_STYLE = 0x0007 ; const UINT32 CLIPPING_SOURCE_WINDING = 0x0010 ; const UINT32 CLIPPING_CLIP_WINDING = 0x0020 ; const UINT32 CLIPPING_IS_STROKED = 0x0040 ; const UINT32 CLIPPING_IS_CLOSED = 0x0080 ; const UINT32 EDGE_CLIP = 0x0001 ; const UINT32 EDGE_REVERSED = 0x0002 ; const UINT32 EDGE_CURVED = 0x0004 ; const UINT32 EDGE_STROKED = 0x0008 ; ///////////////////////////////////////////////////////////////////////////////////////////////// struct Curve { POINT P0 ; POINT P1 ; POINT P2 ; POINT P3 ; } ; struct Edge { Edge *LK ; // Link Edge *RLK ; // Reverse link - only used to initially sort the edges double DX ; // Slope = (XE-XS)/(YE-YE) INT32 XS,YS ; // Start point INT32 XE,YE ; // End point INT32 XI,YI ; // Intersection point UINT32 FF ; // Flags Curve *ID ; // Pointer to curve data - used as curve ID. UINT32 TS ; // Start t parameter UINT32 TE ; // End t parameter } ; struct LineEdge { Edge *LK ; Edge *RLK ; double DX ; INT32 XS,YS ; INT32 XE,YE ; INT32 XI,YI ; UINT32 FF ; } ; struct CurveEdge { Edge *LK ; Edge *RLK ; double DX ; INT32 XS,YS ; INT32 XE,YE ; INT32 XI,YI ; UINT32 FF ; Curve *ID ; UINT32 TS ; UINT32 TE ; } ; struct Strip { Strip *FSLK ; // [L]in[K] to next strip, [F]orward sorted by [S]tart value. Strip *RELK ; // [L]in[K] to next strip, [R]everse sorted by [E]nd value. INT32 YS,YE ; union { struct { INT32 XSL,XEL ; union { double DXL ; __int64 FGL ; // -infinity if curve, +infinity if strip is invalid } ; UINT32 TSL,TEL ; INT32 XSR,XER ; union { double DXR ; __int64 FGR ; // -infinity if curve } ; UINT32 TSR,TER ; Curve *IDL,*IDR ; } ; struct { Strip *FELK ; // [L]in[K] to next strip, [F]orward sorted by [E]nd value. Strip *RSLK ; // [L]in[K] to next strip, [R]everse sorted by [S]tart value. INT32 XS,XE ; union { double DX ; __int64 FG ; } ; UINT32 TS,TE ; Curve *ID ; } ; } ; } ; struct FilledStrip { Strip *FSLK ; // [L]in[K] to next strip, [F]orward sorted by [S]tart value. Strip *RELK ; // [L]in[K] to next strip, [R]everse sorted by [E]nd value. INT32 YS,YE ; INT32 XSL,XEL ; union { double DXL ; __int64 FGL ; // -infinity if curve, +infinity if strip is invalid } ; UINT32 TSL,TEL ; INT32 XSR,XER ; union { double DXR ; __int64 FGR ; // -infinity if curve } ; UINT32 TSR,TER ; Curve *IDL,*IDR ; } ; struct LineStrip { Strip *FSLK ; // [L]in[K] to next strip, [F]orward sorted by [S]tart value. Strip *RELK ; // [L]in[K] to next strip, [R]everse sorted by [E]nd value. INT32 YS,YE ; Strip *FELK ; // [L]in[K] to next strip, [F]orward sorted by [E]nd value. Strip *RSLK ; // [L]in[K] to next strip, [R]everse sorted by [S]tart value. INT32 XS,XE ; union { double DX ; __int64 FG ; } ; UINT32 TS,TE ; Curve *ID ; } ; ///////////////////////////////////////////////////////////////////////////////////////////////// inline bool IsMove ( CONST BYTE Type ) { return (Type & PT_MOVETO)==PT_MOVETO ; } inline bool IsLine ( CONST BYTE Type ) { return (Type & PT_MOVETO)==PT_LINETO ; } inline bool IsCurve( CONST BYTE Type ) { return (Type & PT_MOVETO)==PT_BEZIERTO ; } inline bool IsntMove ( CONST BYTE Type ) { return (Type & PT_MOVETO)!=PT_MOVETO ; } inline bool IsntLine ( CONST BYTE Type ) { return (Type & PT_MOVETO)!=PT_LINETO ; } inline bool IsntCurve( CONST BYTE Type ) { return (Type & PT_MOVETO)!=PT_BEZIERTO ; } ///////////////////////////////////////////////////////////////////////////////////////////////// #pragma warning( disable : 4800 ) inline bool IsSourceWinding( UINT32 Flags ) { return Flags & CLIPPING_SOURCE_WINDING ; } inline bool IsClipWinding ( UINT32 Flags ) { return Flags & CLIPPING_CLIP_WINDING ; } inline bool IsPathStroked ( UINT32 Flags ) { return Flags & CLIPPING_IS_STROKED ; } inline bool IsPathClosed ( UINT32 Flags ) { return Flags & CLIPPING_IS_CLOSED ; } #pragma warning( default : 4800 ) ///////////////////////////////////////////////////////////////////////////////////////////////// inline UINT32 LO( CONST UINT32 l ) { return l & 0x0000ffff ; } inline UINT32 HI( CONST UINT32 l ) { return l & 0xffff0000 ; } /////////////////////////////////////////////////////////////////////////////////////////////////