apdf/freetype2/pshinter/pshalgo1.h

   1 /***************************************************************************/
   2 /*                                                                         */
   3 /*  pshalgo1.h                                                             */
   4 /*                                                                         */
   5 /*    PostScript hinting algorithm 1 (specification).                      */
   6 /*                                                                         */
   7 /*  Copyright 2001 by                                                      */
   8 /*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
   9 /*                                                                         */
  10 /*  This file is part of the FreeType project, and may only be used,       */
  11 /*  modified, and distributed under the terms of the FreeType project      */
  12 /*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */
  13 /*  this file you indicate that you have read the license and              */
  14 /*  understand and accept it fully.                                        */
  15 /*                                                                         */
  16 /***************************************************************************/
  17
  18
  19 #ifndef __PSHALGO1_H__
  20 #define __PSHALGO1_H__
  21
  22 #include "pshrec.h"
  23
  24 FT_BEGIN_HEADER
  25
  26   typedef struct PSH1_HintRec_*  PSH1_Hint;
  27
  28   typedef enum
  29   {
  30     PSH1_HINT_FLAG_GHOST  = PS_HINT_FLAG_GHOST,
  31     PSH1_HINT_FLAG_BOTTOM = PS_HINT_FLAG_BOTTOM,
  32     PSH1_HINT_FLAG_ACTIVE = 4
  33
  34   } PSH1_Hint_Flags;
  35
  36 #define psh1_hint_is_active( x )                          \
  37           ( ( (x)->flags & PSH1_HINT_FLAG_ACTIVE ) != 0 )
  38 #define psh1_hint_is_ghost( x )                          \
  39           ( ( (x)->flags & PSH1_HINT_FLAG_GHOST ) != 0 )
  40
  41 #define psh1_hint_activate( x )    (x)->flags |= PSH1_HINT_FLAG_ACTIVE
  42 #define psh1_hint_deactivate( x )  (x)->flags &= ~PSH1_HINT_FLAG_ACTIVE
  43
  44   typedef struct  PSH1_HintRec_
  45   {
  46     FT_Int     org_pos;
  47     FT_Int     org_len;
  48     FT_Pos     cur_pos;
  49     FT_Pos     cur_len;
  50
  51     FT_UInt    flags;
  52
  53     PSH1_Hint  parent;
  54     FT_Int     order;
  55
  56   } PSH1_HintRec;
  57
  58
  59   /* this is an interpolation zone used for strong points;  */
  60   /* weak points are interpolated according to their strong */
  61   /* neighbours                                             */
  62   typedef struct  PSH1_ZoneRec_
  63   {
  64     FT_Fixed  scale;
  65     FT_Fixed  delta;
  66     FT_Pos    min;
  67     FT_Pos    max;
  68
  69   } PSH1_ZoneRec, *PSH1_Zone;
  70
  71
  72   typedef struct  PSH1_Hint_TableRec_
  73   {
  74     FT_UInt        max_hints;
  75     FT_UInt        num_hints;
  76     PSH1_Hint      hints;
  77     PSH1_Hint*     sort;
  78     PSH1_Hint*     sort_global;
  79     FT_UInt        num_zones;
  80     PSH1_Zone      zones;
  81     PSH1_Zone      zone;
  82     PS_Mask_Table  hint_masks;
  83     PS_Mask_Table  counter_masks;
  84
  85   } PSH1_Hint_TableRec, *PSH1_Hint_Table;
  86
  87
  88   extern FT_Error
  89   ps1_hints_apply( PS_Hints     ps_hints,
  90                    FT_Outline*  outline,
  91                    PSH_Globals  globals );
  92
  93
  94 #ifdef DEBUG_HINTER
  95   extern  PSH1_Hint_Table  ps1_debug_hint_table;
  96
  97   typedef void
  98   (*PSH1_HintFunc)( PSH1_Hint  hint,
  99                     FT_Bool    vertical );
 100
 101   extern PSH1_HintFunc  ps1_debug_hint_func;
 102 #endif
 103
 104 FT_END_HEADER
 105
 106 #endif /* __PSHALGO1_H__ */
 107
 108
 109 /* END */