/***************************************************************************//*                                                                         *//*  pshalgo.h                                                              *//*                                                                         *//*    PostScript hinting algorithm (specification).                        *//*                                                                         *//*  Copyright 2001, 2002, 2003 by                                          *//*  David Turner, Robert Wilhelm, and Werner Lemberg.                      *//*                                                                         *//*  This file is part of the FreeType project, and may only be used,       *//*  modified, and distributed under the terms of the FreeType project      *//*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     *//*  this file you indicate that you have read the license and              *//*  understand and accept it fully.                                        *//*                                                                         *//***************************************************************************/#ifndef __PSHALGO_H__#define __PSHALGO_H__#include "pshrec.h"#include "pshglob.h"#include FT_TRIGONOMETRY_HFT_BEGIN_HEADER  /* handle to Hint structure */  typedef struct PSH_HintRec_*  PSH_Hint;  /* hint bit-flags */  typedef enum  {    PSH_HINT_GHOST  = PS_HINT_FLAG_GHOST,    PSH_HINT_BOTTOM = PS_HINT_FLAG_BOTTOM,    PSH_HINT_ACTIVE = 4,    PSH_HINT_FITTED = 8  } PSH_Hint_Flags;#define psh_hint_is_active( x )  ( ( (x)->flags & PSH_HINT_ACTIVE ) != 0 )#define psh_hint_is_ghost( x )   ( ( (x)->flags & PSH_HINT_GHOST  ) != 0 )#define psh_hint_is_fitted( x )  ( ( (x)->flags & PSH_HINT_FITTED ) != 0 )#define psh_hint_activate( x )    (x)->flags |=  PSH_HINT_ACTIVE#define psh_hint_deactivate( x )  (x)->flags &= ~PSH_HINT_ACTIVE#define psh_hint_set_fitted( x )  (x)->flags |=  PSH_HINT_FITTED  /* hint structure */  typedef struct  PSH_HintRec_  {    FT_Int    org_pos;    FT_Int    org_len;    FT_Pos    cur_pos;    FT_Pos    cur_len;    FT_UInt   flags;    PSH_Hint  parent;    FT_Int    order;  } PSH_HintRec;  /* this is an interpolation zone used for strong points;  */  /* weak points are interpolated according to their strong */  /* neighbours                                             */  typedef struct  PSH_ZoneRec_  {    FT_Fixed  scale;    FT_Fixed  delta;    FT_Pos    min;    FT_Pos    max;  } PSH_ZoneRec, *PSH_Zone;  typedef struct  PSH_Hint_TableRec_  {    FT_UInt        max_hints;    FT_UInt        num_hints;    PSH_Hint       hints;    PSH_Hint*      sort;    PSH_Hint*      sort_global;    FT_UInt        num_zones;    PSH_ZoneRec*   zones;    PSH_Zone       zone;    PS_Mask_Table  hint_masks;    PS_Mask_Table  counter_masks;  } PSH_Hint_TableRec, *PSH_Hint_Table;  typedef struct PSH_PointRec_*    PSH_Point;  typedef struct PSH_ContourRec_*  PSH_Contour;  enum  {    PSH_DIR_NONE  =  4,    PSH_DIR_UP    = -1,    PSH_DIR_DOWN  =  1,    PSH_DIR_LEFT  = -2,    PSH_DIR_RIGHT =  2  };#define PSH_DIR_HORIZONTAL  2#define PSH_DIR_VERTICAL    1#define PSH_DIR_COMPARE( d1, d2 )   ( (d1) == (d2) || (d1) == -(d2) )#define PSH_DIR_IS_HORIZONTAL( d )  PSH_DIR_COMPARE( d, PSH_DIR_HORIZONTAL )#define PSH_DIR_IS_VERTICAL( d )    PSH_DIR_COMPARE( d, PSH_DIR_VERTICAL ) /* the following bit-flags are computed once by the glyph */ /* analyzer, for both dimensions                          */  enum  {    PSH_POINT_OFF    = 1,   /* point is off the curve */    PSH_POINT_SMOOTH = 2,   /* point is smooth        */    PSH_POINT_INFLEX = 4    /* point is inflection    */  };#define psh_point_is_smooth( p )  ( (p)->flags & PSH_POINT_SMOOTH )#define psh_point_is_off( p )     ( (p)->flags & PSH_POINT_OFF    )#define psh_point_is_inflex( p )  ( (p)->flags & PSH_POINT_INFLEX )#define psh_point_set_smooth( p )  (p)->flags |= PSH_POINT_SMOOTH#define psh_point_set_off( p )     (p)->flags |= PSH_POINT_OFF#define psh_point_set_inflex( p )  (p)->flags |= PSH_POINT_INFLEX  /* the following bit-flags are re-computed for each dimension */  enum  {    PSH_POINT_STRONG   = 16,   /* point is strong                           */    PSH_POINT_FITTED   = 32,   /* point is already fitted                   */    PSH_POINT_EXTREMUM = 64,   /* point is local extremum                   */    PSH_POINT_POSITIVE = 128,  /* extremum has positive contour flow        */    PSH_POINT_NEGATIVE = 256,  /* extremum has negative contour flow        */    PSH_POINT_EDGE_MIN = 512,  /* point is aligned to left/bottom stem edge */    PSH_POINT_EDGE_MAX = 1024  /* point is aligned to top/right stem edge   */  };#define psh_point_is_strong( p )    ( (p)->flags2 & PSH_POINT_STRONG )#define psh_point_is_fitted( p )    ( (p)->flags2 & PSH_POINT_FITTED )#define psh_point_is_extremum( p )  ( (p)->flags2 & PSH_POINT_EXTREMUM )#define psh_point_is_positive( p )  ( (p)->flags2 & PSH_POINT_POSITIVE )#define psh_point_is_negative( p )  ( (p)->flags2 & PSH_POINT_NEGATIVE )#define psh_point_is_edge_min( p )  ( (p)->flags2 & PSH_POINT_EDGE_MIN )#define psh_point_is_edge_max( p )  ( (p)->flags2 & PSH_POINT_EDGE_MAX )#define psh_point_set_strong( p )    (p)->flags2 |= PSH_POINT_STRONG#define psh_point_set_fitted( p )    (p)->flags2 |= PSH_POINT_FITTED#define psh_point_set_extremum( p )  (p)->flags2 |= PSH_POINT_EXTREMUM#define psh_point_set_positive( p )  (p)->flags2 |= PSH_POINT_POSITIVE#define psh_point_set_negative( p )  (p)->flags2 |= PSH_POINT_NEGATIVE#define psh_point_set_edge_min( p )  (p)->flags2 |= PSH_POINT_EDGE_MIN#define psh_point_set_edge_max( p )  (p)->flags2 |= PSH_POINT_EDGE_MAX  typedef struct  PSH_PointRec_  {    PSH_Point    prev;    PSH_Point    next;    PSH_Contour  contour;    FT_UInt      flags;    FT_UInt      flags2;    FT_Char      dir_in;    FT_Char      dir_out;    FT_Angle     angle_in;    FT_Angle     angle_out;    PSH_Hint     hint;    FT_Pos       org_u;    FT_Pos       org_v;    FT_Pos       cur_u;#ifdef DEBUG_HINTER    FT_Pos       org_x;    FT_Pos       cur_x;    FT_Pos       org_y;    FT_Pos       cur_y;    FT_UInt      flags_x;    FT_UInt      flags_y;#endif  } PSH_PointRec;#define PSH_POINT_EQUAL_ORG( a, b )  ( (a)->org_u == (b)->org_u && \                                       (a)->org_v == (b)->org_v )#define PSH_POINT_ANGLE( a, b )  FT_Atan2( (b)->org_u - (a)->org_u,  \                                           (b)->org_v - (a)->org_v )  typedef struct  PSH_ContourRec_  {    PSH_Point  start;    FT_UInt    count;  } PSH_ContourRec;  typedef struct  PSH_GlyphRec_  {    FT_UInt            num_points;    FT_UInt            num_contours;    PSH_Point          points;    PSH_Contour        contours;    FT_Memory          memory;    FT_Outline*        outline;    PSH_Globals        globals;    PSH_Hint_TableRec  hint_tables[2];    FT_Bool            vertical;    FT_Int             major_dir;    FT_Int             minor_dir;    FT_Bool            do_horz_hints;    FT_Bool            do_vert_hints;    FT_Bool            do_horz_snapping;    FT_Bool            do_vert_snapping;    FT_Bool            do_stem_adjust;  } PSH_GlyphRec, *PSH_Glyph;#ifdef DEBUG_HINTER  extern PSH_Hint_Table  ps_debug_hint_table;  typedef void  (*PSH_HintFunc)( PSH_Hint  hint,                   FT_Bool   vertical );  extern PSH_HintFunc    ps_debug_hint_func;  extern PSH_Glyph       ps_debug_glyph;#endif  extern FT_Error  ps_hints_apply( PS_Hints        ps_hints,                  FT_Outline*     outline,                  PSH_Globals     globals,                  FT_Render_Mode  hint_mode );FT_END_HEADER#endif /* __PSHALGO_H__ *//* END */