1 /***************************************************************************/ 2 /* */ 3 /* afglobal.h */ 4 /* */ 5 /* Auto-fitter routines to compute global hinting values */ 6 /* (specification). */ 7 /* */ 8 /* Copyright 2003-2018 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 "afshaper.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, H, ss ) \ 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 hb_buffer_t* hb_buf; /* for feature comparison */ 114 #endif 115 116 /* per-face auto-hinter properties */ 117 FT_UInt increase_x_height; 118 119 AF_StyleMetrics metrics[AF_STYLE_MAX]; 120 121 /* Compute darkening amount once per size. Use this to check whether */ 122 /* darken_{x,y} needs to be recomputed. */ 123 FT_UShort stem_darkening_for_ppem; 124 /* Copy from e.g. AF_LatinMetrics.axis[AF_DIMENSION_HORZ] */ 125 /* to compute the darkening amount. */ 126 FT_Pos standard_vertical_width; 127 /* Copy from e.g. AF_LatinMetrics.axis[AF_DIMENSION_VERT] */ 128 /* to compute the darkening amount. */ 129 FT_Pos standard_horizontal_width; 130 /* The actual amount to darken a glyph along the X axis. */ 131 FT_Pos darken_x; 132 /* The actual amount to darken a glyph along the Y axis. */ 133 FT_Pos darken_y; 134 /* Amount to scale down by to keep emboldened points */ 135 /* on the Y-axis in pre-computed blue zones. */ 136 FT_Fixed scale_down_factor; 137 AF_Module module; /* to access global properties */ 138 139 } AF_FaceGlobalsRec; 140 141 142 /* 143 * model the global hints data for a given face, decomposed into 144 * style-specific items 145 */ 146 147 FT_LOCAL( FT_Error ) 148 af_face_globals_new( FT_Face face, 149 AF_FaceGlobals *aglobals, 150 AF_Module module ); 151 152 FT_LOCAL( FT_Error ) 153 af_face_globals_get_metrics( AF_FaceGlobals globals, 154 FT_UInt gindex, 155 FT_UInt options, 156 AF_StyleMetrics *ametrics ); 157 158 FT_LOCAL( void ) 159 af_face_globals_free( AF_FaceGlobals globals ); 160 161 FT_LOCAL_DEF( FT_Bool ) 162 af_face_globals_is_digit( AF_FaceGlobals globals, 163 FT_UInt gindex ); 164 165 /* */ 166 167 168 FT_END_HEADER 169 170 #endif /* AFGLOBAL_H_ */ 171 172 173 /* END */ 174
