// $Id: gblend.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 blend code ///////////////////////////////////////////////////////////////////////////////////////////////// // // GBlend.h // ///////////////////////////////////////////////////////////////////////////////////////////////// /************************************************************************************************ void Define( PPOINT Src0Points, First source path PBYTE Src0Types, UINT32 Src0Length, PPOINT Src1Points, Second source path PBYTE Src1Types, UINT32 Src1Length, BOOL Flag, Set for 1 to 1 blending UINT32 pFlatness, Flatness PUINT32 Buffer, Workspace UINT32 BufferLength Workspace length ) ; This call should be made once in order to set up a blend. It will blend one subpath to one other subpath. Each subpath is treated as though it is unclosed. Paths are expected to be in the form of a single subpath. ClosePath options are ignored. Workspace required is 4 bytes per path element per path. Note that currently (04/11/94) there is a lack of error handling. Paths should be in the correct format. ///////////////////////////////////////////////////////////////////////////////////////////////// UINT32 Blend( double pRatio, Blend ratio of 1st path to 2nd path PPOINT DstPoints, Destination path PBYTE DstTypes, UINT32 DstLength Maximum length of destination path. ) ; This call actually performs a blend. It should be called once for each required value of pRatio. ************************************************************************************************/ class GBlend { public: void Define( PPOINT Src0Points, PBYTE Src0Types, UINT32 Src0Length, PPOINT Src1Points, PBYTE Src1Types, UINT32 Src1Length, BOOL Flag, UINT32 pFlatness, PUINT32 Buffer, UINT32 BufferLength ) ; UINT32 Blend( double pRatio, PPOINT DstPoints, PBYTE DstTypes, INT32 DstLength ) ; private: BOOL Is1to1 ; UINT32 Flatness ; INT32 Ratio ; PPOINT S0Points ; PBYTE S0Types ; UINT32 S0Length ; PUINT32 LengthPtr0 ; PUINT32 EndLengthPtr0 ; PPOINT S1Points ; PBYTE S1Types ; UINT32 S1Length ; PUINT32 LengthPtr1 ; PUINT32 EndLengthPtr1 ; PPOINT OPoints ; PBYTE OTypes ; size_t OLength ; PPOINT IPoints0 ; PBYTE ITypes0 ; UINT32 ILength0 ; PPOINT IPoints1 ; PBYTE ITypes1 ; UINT32 ILength1 ; PUINT32 LPtr0 ; BYTE Type0 ; UINT32 Length0 ; INT32 Match0 ; UINT32 Total0 ; PUINT32 LPtr1 ; BYTE Type1 ; UINT32 Length1 ; INT32 Match1 ; UINT32 Total1 ; POINT P00,P01,P02,P03 ; POINT P10,P11,P12,P13 ; POINT L1,L2,M,R1,R2 ; BOOL CalcPathLengths( PPOINT Points, PBYTE Types, UINT32 Length, PUINT32 Buffer, UINT32 BufferLength, PUINT32 &BufferEnd ) ; BOOL BlendNtoN() ; BOOL BlendMtoN() ; BOOL Blend1to1() ; BOOL BlendPoint( BYTE Type, POINT P0, POINT P1 ) ; BOOL BlendCurve( POINT P01,POINT P02,POINT P03, POINT P11,POINT P12,POINT P13 ) ; void Match ( PUINT32 Ptr, PUINT32 EndPtr, UINT32 Length, INT32 &Match, UINT32 &Total ) ; void MatchLast( PUINT32 Ptr, PUINT32 EndPtr, UINT32 Length, INT32 &Match, UINT32 &Total ) ; void ReadPath0() ; void ReadPathStart0() ; void ReadPath1() ; void ReadPathStart1() ; void Split( POINT P0,POINT P1,POINT P2,POINT P3, INT32 N,UINT32 D ) ; INT32 BezierLength( POINT P0, POINT P1, POINT P2, POINT P3 ) ; INT32 FlattenSplit( POINT P0, POINT P1, POINT P2, POINT P3 ) ; } ; /////////////////////////////////////////////////////////////////////////////////////////////////