ref: 03011c6462105cfd4cc2a1008780f21f30d42c11
dir: /src/autohint/ahoptim.h/
/***************************************************************************/ /* */ /* 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 */