thirdparty/freetype-2.3.12/src/pshinter/pshglob.h

   1 /***************************************************************************/
   2 /*                                                                         */
   3 /*  pshglob.h                                                              */
   4 /*                                                                         */
   5 /*    PostScript hinter global hinting management.                         */
   6 /*                                                                         */
   7 /*  Copyright 2001, 2002, 2003 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 __PSHGLOB_H__
  20 #define __PSHGLOB_H__
  21
  22
  23 #include FT_FREETYPE_H
  24 #include FT_INTERNAL_POSTSCRIPT_HINTS_H
  25
  26
  27 FT_BEGIN_HEADER
  28
  29
  30   /*************************************************************************/
  31   /*************************************************************************/
  32   /*****                                                               *****/
  33   /*****                    GLOBAL HINTS INTERNALS                     *****/
  34   /*****                                                               *****/
  35   /*************************************************************************/
  36   /*************************************************************************/
  37
  38
  39   /*************************************************************************/
  40   /*                                                                       */
  41   /* @constant:                                                            */
  42   /*    PS_GLOBALS_MAX_BLUE_ZONES                                          */
  43   /*                                                                       */
  44   /* @description:                                                         */
  45   /*    The maximum number of blue zones in a font global hints structure. */
  46   /*    See @PS_Globals_BluesRec.                                          */
  47   /*                                                                       */
  48 #define PS_GLOBALS_MAX_BLUE_ZONES  16
  49
  50
  51   /*************************************************************************/
  52   /*                                                                       */
  53   /* @constant:                                                            */
  54   /*    PS_GLOBALS_MAX_STD_WIDTHS                                          */
  55   /*                                                                       */
  56   /* @description:                                                         */
  57   /*    The maximum number of standard and snap widths in either the       */
  58   /*    horizontal or vertical direction.  See @PS_Globals_WidthsRec.      */
  59   /*                                                                       */
  60 #define PS_GLOBALS_MAX_STD_WIDTHS  16
  61
  62
  63   /* standard and snap width */
  64   typedef struct  PSH_WidthRec_
  65   {
  66     FT_Int  org;
  67     FT_Pos  cur;
  68     FT_Pos  fit;
  69
  70   } PSH_WidthRec, *PSH_Width;
  71
  72
  73   /* standard and snap widths table */
  74   typedef struct  PSH_WidthsRec_
  75   {
  76     FT_UInt       count;
  77     PSH_WidthRec  widths[PS_GLOBALS_MAX_STD_WIDTHS];
  78
  79   } PSH_WidthsRec, *PSH_Widths;
  80
  81
  82   typedef struct  PSH_DimensionRec_
  83   {
  84     PSH_WidthsRec  stdw;
  85     FT_Fixed       scale_mult;
  86     FT_Fixed       scale_delta;
  87
  88   } PSH_DimensionRec, *PSH_Dimension;
  89
  90
  91   /* blue zone descriptor */
  92   typedef struct  PSH_Blue_ZoneRec_
  93   {
  94     FT_Int  org_ref;
  95     FT_Int  org_delta;
  96     FT_Int  org_top;
  97     FT_Int  org_bottom;
  98
  99     FT_Pos  cur_ref;
 100     FT_Pos  cur_delta;
 101     FT_Pos  cur_bottom;
 102     FT_Pos  cur_top;
 103
 104   } PSH_Blue_ZoneRec, *PSH_Blue_Zone;
 105
 106
 107   typedef struct  PSH_Blue_TableRec_
 108   {
 109     FT_UInt           count;
 110     PSH_Blue_ZoneRec  zones[PS_GLOBALS_MAX_BLUE_ZONES];
 111
 112   } PSH_Blue_TableRec, *PSH_Blue_Table;
 113
 114
 115   /* blue zones table */
 116   typedef struct  PSH_BluesRec_
 117   {
 118     PSH_Blue_TableRec  normal_top;
 119     PSH_Blue_TableRec  normal_bottom;
 120     PSH_Blue_TableRec  family_top;
 121     PSH_Blue_TableRec  family_bottom;
 122
 123     FT_Fixed           blue_scale;
 124     FT_Int             blue_shift;
 125     FT_Int             blue_threshold;
 126     FT_Int             blue_fuzz;
 127     FT_Bool            no_overshoots;
 128
 129   } PSH_BluesRec, *PSH_Blues;
 130
 131
 132   /* font globals.                                         */
 133   /* dimension 0 => X coordinates + vertical hints/stems   */
 134   /* dimension 1 => Y coordinates + horizontal hints/stems */
 135   typedef struct  PSH_GlobalsRec_
 136   {
 137     FT_Memory         memory;
 138     PSH_DimensionRec  dimension[2];
 139     PSH_BluesRec      blues;
 140
 141   } PSH_GlobalsRec;
 142
 143
 144 #define PSH_BLUE_ALIGN_NONE  0
 145 #define PSH_BLUE_ALIGN_TOP   1
 146 #define PSH_BLUE_ALIGN_BOT   2
 147
 148
 149   typedef struct  PSH_AlignmentRec_
 150   {
 151     int     align;
 152     FT_Pos  align_top;
 153     FT_Pos  align_bot;
 154
 155   } PSH_AlignmentRec, *PSH_Alignment;
 156
 157
 158   FT_LOCAL( void )
 159   psh_globals_funcs_init( PSH_Globals_FuncsRec*  funcs );
 160
 161
 162 #if 0
 163   /* snap a stem width to fitter coordinates.  `org_width' is in font */
 164   /* units.  The result is in device pixels (26.6 format).            */
 165   FT_LOCAL( FT_Pos )
 166   psh_dimension_snap_width( PSH_Dimension  dimension,
 167                             FT_Int         org_width );
 168 #endif
 169
 170   FT_LOCAL( FT_Error )
 171   psh_globals_set_scale( PSH_Globals  globals,
 172                          FT_Fixed     x_scale,
 173                          FT_Fixed     y_scale,
 174                          FT_Fixed     x_delta,
 175                          FT_Fixed     y_delta );
 176
 177   /* snap a stem to one or two blue zones */
 178   FT_LOCAL( void )
 179   psh_blues_snap_stem( PSH_Blues      blues,
 180                        FT_Int         stem_top,
 181                        FT_Int         stem_bot,
 182                        PSH_Alignment  alignment );
 183   /* */
 184
 185 #ifdef DEBUG_HINTER
 186   extern PSH_Globals  ps_debug_globals;
 187 #endif
 188
 189
 190 FT_END_HEADER
 191
 192
 193 #endif /* __PSHGLOB_H__ */
 194
 195
 196 /* END */