/***************************************************************************//*                                                                         *//*  ahoptim.h                                                              *//*                                                                         *//*    FreeType auto hinting outline optimization (declaration).            *//*                                                                         *//*  Copyright 2000-2001 Catharon Productions Inc.                          *//*  Author: David Turner                                                   *//*                                                                         *//*  This file is part of the Catharon Typography Project and shall only    *//*  be used, modified, and distributed under the terms of the Catharon     *//*  Open Source License that should come with this file under the name     *//*  `CatharonLicense.txt'.  By continuing to use, modify, or distribute    *//*  this file you indicate that you have read the license and              *//*  understand and accept it fully.                                        *//*                                                                         *//*  Note that this license is compatible with the FreeType license.        *//*                                                                         *//***************************************************************************/  #ifndef __AHOPTIM_H__#define __AHOPTIM_H__  #include <ft2build.h>#include "ahtypes.h"  FT_BEGIN_HEADER    /* the maximal number of stem configurations to record */  /* during optimization                                 */#define AH_MAX_CONFIGS  8    typedef struct  AH_Stem_  {    FT_Pos   pos;       /* current position        */    FT_Pos   velocity;  /* current velocity        */    FT_Pos   force;     /* sum of current forces   */    FT_Pos   width;     /* normalized width        */     FT_Pos   min_pos;   /* minimum grid position */    FT_Pos   max_pos;   /* maximum grid position */     AH_Edge  edge1;     /* left/bottom edge */    AH_Edge  edge2;     /* right/top edge   */     FT_Pos   opos;      /* original position */    FT_Pos   owidth;    /* original width    */     FT_Pos   min_coord; /* minimum coordinate */    FT_Pos   max_coord; /* maximum coordinate */   } AH_Stem;    /* A spring between two stems */  typedef struct  AH_Spring_  {    AH_Stem*  stem1;    AH_Stem*  stem2;    FT_Pos    owidth;   /* original width  */    FT_Pos    tension;  /* current tension */   } AH_Spring;    /* A configuration records the position of each stem at a given time  */  /* as well as the associated distortion                               */  typedef struct AH_Configuration_  {    FT_Pos*  positions;    FT_Long  distortion;   } AH_Configuration;    typedef struct  AH_Optimizer_  {    FT_Memory         memory;    AH_Outline        outline;     FT_Int            num_hstems;    AH_Stem*          horz_stems;     FT_Int            num_vstems;    AH_Stem*          vert_stems;     FT_Int            num_hsprings;    FT_Int            num_vsprings;    AH_Spring*        horz_springs;    AH_Spring*        vert_springs;     FT_Int            num_configs;    AH_Configuration  configs[AH_MAX_CONFIGS];    FT_Pos*           positions;     /* during each pass, use these instead */    FT_Int            num_stems;    AH_Stem*          stems;     FT_Int            num_springs;    AH_Spring*        springs;    FT_Bool           vertical;     FT_Fixed          tension_scale;    FT_Pos            tension_threshold;   } AH_Optimizer;    /* loads the outline into the optimizer */  int  AH_Optimizer_Init( AH_Optimizer*  optimizer,                     AH_Outline     outline,                     FT_Memory      memory );    /* compute optimal outline */  void  AH_Optimizer_Compute( AH_Optimizer*  optimizer );    /* release the optimization data */  void  AH_Optimizer_Done( AH_Optimizer*  optimizer );  FT_END_HEADER #endif /* __AHOPTIM_H__ */  /* END */