reactos/lib/3rdparty/freetype/src/autofit/afglobal.h

   1 /***************************************************************************/
   2 /*                                                                         */
   3 /*  afglobal.h                                                             */
   4 /*                                                                         */
   5 /*    Auto-fitter routines to compute global hinting values                */
   6 /*    (specification).                                                     */
   7 /*                                                                         */
   8 /*  Copyright 2003-2015 by                                                 */
   9 /*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
  10 /*                                                                         */
  11 /*  This file is part of the FreeType project, and may only be used,       */
  12 /*  modified, and distributed under the terms of the FreeType project      */
  13 /*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */
  14 /*  this file you indicate that you have read the license and              */
  15 /*  understand and accept it fully.                                        */
  16 /*                                                                         */
  17 /***************************************************************************/
  18
  19
  20 #ifndef __AFGLOBAL_H__
  21 #define __AFGLOBAL_H__
  22
  23
  24 #include "aftypes.h"
  25 #include "afmodule.h"
  26 #include "hbshim.h"
  27
  28
  29 FT_BEGIN_HEADER
  30
  31
  32   FT_LOCAL_ARRAY( AF_WritingSystemClass )
  33   af_writing_system_classes[];
  34
  35
  36 #undef  SCRIPT
  37 #define SCRIPT( s, S, d, h, sc1, sc2, sc3 )                    \
  38           AF_DECLARE_SCRIPT_CLASS( af_ ## s ## _script_class )
  39
  40 #include "afscript.h"
  41
  42   FT_LOCAL_ARRAY( AF_ScriptClass )
  43   af_script_classes[];
  44
  45
  46 #undef  STYLE
  47 #define STYLE( s, S, d, ws, sc, ss, c )                      \
  48           AF_DECLARE_STYLE_CLASS( af_ ## s ## _style_class )
  49
  50 #include "afstyles.h"
  51
  52   FT_LOCAL_ARRAY( AF_StyleClass )
  53   af_style_classes[];
  54
  55
  56 #ifdef FT_DEBUG_LEVEL_TRACE
  57   FT_LOCAL_ARRAY( char* )
  58   af_style_names[];
  59 #endif
  60
  61
  62   /*
  63    *  Default values and flags for both autofitter globals (found in
  64    *  AF_ModuleRec) and face globals (in AF_FaceGlobalsRec).
  65    */
  66
  67   /* index of fallback style in `af_style_classes' */
  68 #ifdef AF_CONFIG_OPTION_CJK
  69 #define AF_STYLE_FALLBACK    AF_STYLE_HANI_DFLT
  70 #else
  71 #define AF_STYLE_FALLBACK    AF_STYLE_NONE_DFLT
  72 #endif
  73   /* default script for OpenType; ignored if HarfBuzz isn't used */
  74 #define AF_SCRIPT_DEFAULT    AF_SCRIPT_LATN
  75
  76   /* a bit mask for AF_DIGIT and AF_NONBASE */
  77 #define AF_STYLE_MASK        0x3FFF
  78   /* an uncovered glyph      */
  79 #define AF_STYLE_UNASSIGNED  AF_STYLE_MASK
  80
  81   /* if this flag is set, we have an ASCII digit   */
  82 #define AF_DIGIT             0x8000U
  83   /* if this flag is set, we have a non-base character */
  84 #define AF_NONBASE           0x4000U
  85
  86   /* `increase-x-height' property */
  87 #define AF_PROP_INCREASE_X_HEIGHT_MIN  6
  88 #define AF_PROP_INCREASE_X_HEIGHT_MAX  0
  89
  90
  91   /************************************************************************/
  92   /************************************************************************/
  93   /*****                                                              *****/
  94   /*****                  F A C E   G L O B A L S                     *****/
  95   /*****                                                              *****/
  96   /************************************************************************/
  97   /************************************************************************/
  98
  99
 100   /*
 101    *  Note that glyph_styles[] maps each glyph to an index into the
 102    *  `af_style_classes' array.
 103    *
 104    */
 105   typedef struct  AF_FaceGlobalsRec_
 106   {
 107     FT_Face          face;
 108     FT_Long          glyph_count;    /* same as face->num_glyphs */
 109     FT_UShort*       glyph_styles;
 110
 111 #ifdef FT_CONFIG_OPTION_USE_HARFBUZZ
 112     hb_font_t*       hb_font;
 113 #endif
 114
 115     /* per-face auto-hinter properties */
 116     FT_UInt          increase_x_height;
 117
 118     AF_StyleMetrics  metrics[AF_STYLE_MAX];
 119
 120     /* Compute darkening amount once per size.  Use this to check whether */
 121     /* darken_{x,y} needs to be recomputed.                               */
 122     FT_UShort        stem_darkening_for_ppem;
 123     /* Copy from e.g. AF_LatinMetrics.axis[AF_DIMENSION_HORZ] */
 124     /* to compute the darkening amount.                       */
 125     FT_Pos           standard_vertical_width;
 126     /* Copy from e.g. AF_LatinMetrics.axis[AF_DIMENSION_VERT] */
 127     /* to compute the darkening amount.                       */
 128     FT_Pos           standard_horizontal_width;
 129     /* The actual amount to darken a glyph along the X axis. */
 130     FT_Pos           darken_x;
 131     /* The actual amount to darken a glyph along the Y axis. */
 132     FT_Pos           darken_y;
 133     /* Amount to scale down by to keep emboldened points */
 134     /* on the Y-axis in pre-computed blue zones.         */
 135     FT_Fixed         scale_down_factor;
 136     AF_Module        module;         /* to access global properties */
 137
 138   } AF_FaceGlobalsRec;
 139
 140
 141   /*
 142    *  model the global hints data for a given face, decomposed into
 143    *  style-specific items
 144    */
 145
 146   FT_LOCAL( FT_Error )
 147   af_face_globals_new( FT_Face          face,
 148                        AF_FaceGlobals  *aglobals,
 149                        AF_Module        module );
 150
 151   FT_LOCAL( FT_Error )
 152   af_face_globals_get_metrics( AF_FaceGlobals    globals,
 153                                FT_UInt           gindex,
 154                                FT_UInt           options,
 155                                AF_StyleMetrics  *ametrics );
 156
 157   FT_LOCAL( void )
 158   af_face_globals_free( AF_FaceGlobals  globals );
 159
 160   FT_LOCAL_DEF( FT_Bool )
 161   af_face_globals_is_digit( AF_FaceGlobals  globals,
 162                             FT_UInt         gindex );
 163
 164   /* */
 165
 166
 167 FT_END_HEADER
 168
 169 #endif /* __AFGLOBAL_H__ */
 170
 171
 172 /* END */