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| 4349 | Serge | 1 | /***************************************************************************/ |
| 2 | /* */ |
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| 3 | /* afcjk.h */ |
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| 4 | /* */ |
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| 5 | /* Auto-fitter hinting routines for CJK script (specification). */ |
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| 6 | /* */ |
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| 7 | /* Copyright 2006, 2007, 2011, 2012 by */ |
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| 8 | /* David Turner, Robert Wilhelm, and Werner Lemberg. */ |
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| 9 | /* */ |
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| 10 | /* This file is part of the FreeType project, and may only be used, */ |
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| 11 | /* modified, and distributed under the terms of the FreeType project */ |
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| 12 | /* license, LICENSE.TXT. By continuing to use, modify, or distribute */ |
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| 13 | /* this file you indicate that you have read the license and */ |
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| 14 | /* understand and accept it fully. */ |
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| 15 | /* */ |
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| 16 | /***************************************************************************/ |
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| 17 | |||
| 18 | |||
| 19 | #ifndef __AFCJK_H__ |
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| 20 | #define __AFCJK_H__ |
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| 21 | |||
| 22 | #include "afhints.h" |
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| 23 | #include "aflatin.h" |
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| 24 | |||
| 25 | |||
| 26 | FT_BEGIN_HEADER |
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| 27 | |||
| 28 | |||
| 29 | /* the CJK-specific script class */ |
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| 30 | |||
| 31 | AF_DECLARE_SCRIPT_CLASS( af_cjk_script_class ) |
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| 32 | |||
| 33 | /* CJK (global) metrics management */ |
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| 34 | |||
| 35 | /* |
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| 36 | * CJK glyphs tend to fill the square. So we have both vertical and |
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| 37 | * horizontal blue zones. But some glyphs have flat bounding strokes that |
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| 38 | * leave some space between neighbour glyphs. |
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| 39 | */ |
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| 40 | enum |
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| 41 | { |
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| 42 | AF_CJK_BLUE_TOP, |
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| 43 | AF_CJK_BLUE_BOTTOM, |
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| 44 | AF_CJK_BLUE_LEFT, |
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| 45 | AF_CJK_BLUE_RIGHT, |
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| 46 | |||
| 47 | AF_CJK_BLUE_MAX |
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| 48 | }; |
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| 49 | |||
| 50 | |||
| 51 | #define AF_CJK_MAX_WIDTHS 16 |
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| 52 | #define AF_CJK_MAX_BLUES AF_CJK_BLUE_MAX |
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| 53 | |||
| 54 | |||
| 55 | enum |
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| 56 | { |
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| 57 | AF_CJK_BLUE_ACTIVE = 1 << 0, |
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| 58 | AF_CJK_BLUE_IS_TOP = 1 << 1, |
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| 59 | AF_CJK_BLUE_IS_RIGHT = 1 << 2, |
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| 60 | AF_CJK_BLUE_ADJUSTMENT = 1 << 3, /* used for scale adjustment */ |
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| 61 | /* optimization */ |
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| 62 | AF_CJK_BLUE_FLAG_MAX |
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| 63 | }; |
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| 64 | |||
| 65 | |||
| 66 | typedef struct AF_CJKBlueRec_ |
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| 67 | { |
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| 68 | AF_WidthRec ref; |
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| 69 | AF_WidthRec shoot; /* undershoot */ |
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| 70 | FT_UInt flags; |
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| 71 | |||
| 72 | } AF_CJKBlueRec, *AF_CJKBlue; |
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| 73 | |||
| 74 | |||
| 75 | typedef struct AF_CJKAxisRec_ |
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| 76 | { |
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| 77 | FT_Fixed scale; |
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| 78 | FT_Pos delta; |
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| 79 | |||
| 80 | FT_UInt width_count; |
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| 81 | AF_WidthRec widths[AF_CJK_MAX_WIDTHS]; |
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| 82 | FT_Pos edge_distance_threshold; |
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| 83 | FT_Pos standard_width; |
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| 84 | FT_Bool extra_light; |
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| 85 | |||
| 86 | /* used for horizontal metrics too for CJK */ |
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| 87 | FT_Bool control_overshoot; |
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| 88 | FT_UInt blue_count; |
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| 89 | AF_CJKBlueRec blues[AF_CJK_BLUE_MAX]; |
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| 90 | |||
| 91 | FT_Fixed org_scale; |
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| 92 | FT_Pos org_delta; |
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| 93 | |||
| 94 | } AF_CJKAxisRec, *AF_CJKAxis; |
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| 95 | |||
| 96 | |||
| 97 | typedef struct AF_CJKMetricsRec_ |
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| 98 | { |
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| 99 | AF_ScriptMetricsRec root; |
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| 100 | FT_UInt units_per_em; |
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| 101 | AF_CJKAxisRec axis[AF_DIMENSION_MAX]; |
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| 102 | |||
| 103 | } AF_CJKMetricsRec, *AF_CJKMetrics; |
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| 104 | |||
| 105 | |||
| 106 | #ifdef AF_CONFIG_OPTION_CJK |
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| 107 | FT_LOCAL( FT_Error ) |
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| 108 | af_cjk_metrics_init( AF_CJKMetrics metrics, |
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| 109 | FT_Face face ); |
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| 110 | |||
| 111 | FT_LOCAL( void ) |
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| 112 | af_cjk_metrics_scale( AF_CJKMetrics metrics, |
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| 113 | AF_Scaler scaler ); |
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| 114 | |||
| 115 | FT_LOCAL( FT_Error ) |
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| 116 | af_cjk_hints_init( AF_GlyphHints hints, |
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| 117 | AF_CJKMetrics metrics ); |
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| 118 | |||
| 119 | FT_LOCAL( FT_Error ) |
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| 120 | af_cjk_hints_apply( AF_GlyphHints hints, |
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| 121 | FT_Outline* outline, |
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| 122 | AF_CJKMetrics metrics ); |
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| 123 | |||
| 124 | /* shared; called from afindic.c */ |
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| 125 | FT_LOCAL( void ) |
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| 126 | af_cjk_metrics_check_digits( AF_CJKMetrics metrics, |
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| 127 | FT_Face face ); |
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| 128 | |||
| 129 | FT_LOCAL( void ) |
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| 130 | af_cjk_metrics_init_widths( AF_CJKMetrics metrics, |
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| 131 | FT_Face face ); |
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| 132 | #endif /* AF_CONFIG_OPTION_CJK */ |
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| 133 | |||
| 134 | |||
| 135 | /* */ |
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| 136 | |||
| 137 | FT_END_HEADER |
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| 138 | |||
| 139 | #endif /* __AFCJK_H__ */ |
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| 140 | |||
| 141 | |||
| 142 | /* END */ |