/***************************************************************************/ | |
/* */ | |
/* afcjk.h */ | |
/* */ | |
/* Auto-fitter hinting routines for CJK writing system (specification). */ | |
/* */ | |
/* Copyright 2006-2015 by */ | |
/* David Turner, Robert Wilhelm, and Werner Lemberg. */ | |
/* */ | |
/* This file is part of the FreeType project, and may only be used, */ | |
/* modified, and distributed under the terms of the FreeType project */ | |
/* license, LICENSE.TXT. By continuing to use, modify, or distribute */ | |
/* this file you indicate that you have read the license and */ | |
/* understand and accept it fully. */ | |
/* */ | |
/***************************************************************************/ | |
#ifndef __AFCJK_H__ | |
#define __AFCJK_H__ | |
#include "afhints.h" | |
#include "aflatin.h" | |
FT_BEGIN_HEADER | |
/* the CJK-specific writing system */ | |
AF_DECLARE_WRITING_SYSTEM_CLASS( af_cjk_writing_system_class ) | |
/*************************************************************************/ | |
/*************************************************************************/ | |
/***** *****/ | |
/***** C J K G L O B A L M E T R I C S *****/ | |
/***** *****/ | |
/*************************************************************************/ | |
/*************************************************************************/ | |
/* | |
* CJK glyphs tend to fill the square. So we have both vertical and | |
* horizontal blue zones. But some glyphs have flat bounding strokes that | |
* leave some space between neighbour glyphs. | |
*/ | |
#define AF_CJK_IS_TOP_BLUE( b ) \ | |
( (b)->properties & AF_BLUE_PROPERTY_CJK_TOP ) | |
#define AF_CJK_IS_HORIZ_BLUE( b ) \ | |
( (b)->properties & AF_BLUE_PROPERTY_CJK_HORIZ ) | |
#define AF_CJK_IS_RIGHT_BLUE AF_CJK_IS_TOP_BLUE | |
#define AF_CJK_MAX_WIDTHS 16 | |
#define AF_CJK_BLUE_ACTIVE ( 1U << 0 ) /* zone height is <= 3/4px */ | |
#define AF_CJK_BLUE_TOP ( 1U << 1 ) /* result of AF_CJK_IS_TOP_BLUE */ | |
#define AF_CJK_BLUE_ADJUSTMENT ( 1U << 2 ) /* used for scale adjustment */ | |
/* optimization */ | |
typedef struct AF_CJKBlueRec_ | |
{ | |
AF_WidthRec ref; | |
AF_WidthRec shoot; /* undershoot */ | |
FT_UInt flags; | |
} AF_CJKBlueRec, *AF_CJKBlue; | |
typedef struct AF_CJKAxisRec_ | |
{ | |
FT_Fixed scale; | |
FT_Pos delta; | |
FT_UInt width_count; /* number of used widths */ | |
AF_WidthRec widths[AF_CJK_MAX_WIDTHS]; /* widths array */ | |
FT_Pos edge_distance_threshold; /* used for creating edges */ | |
FT_Pos standard_width; /* the default stem thickness */ | |
FT_Bool extra_light; /* is standard width very light? */ | |
/* used for horizontal metrics too for CJK */ | |
FT_Bool control_overshoot; | |
FT_UInt blue_count; | |
AF_CJKBlueRec blues[AF_BLUE_STRINGSET_MAX]; | |
FT_Fixed org_scale; | |
FT_Pos org_delta; | |
} AF_CJKAxisRec, *AF_CJKAxis; | |
typedef struct AF_CJKMetricsRec_ | |
{ | |
AF_StyleMetricsRec root; | |
FT_UInt units_per_em; | |
AF_CJKAxisRec axis[AF_DIMENSION_MAX]; | |
} AF_CJKMetricsRec, *AF_CJKMetrics; | |
#ifdef AF_CONFIG_OPTION_CJK | |
FT_LOCAL( FT_Error ) | |
af_cjk_metrics_init( AF_CJKMetrics metrics, | |
FT_Face face ); | |
FT_LOCAL( void ) | |
af_cjk_metrics_scale( AF_CJKMetrics metrics, | |
AF_Scaler scaler ); | |
FT_LOCAL( FT_Error ) | |
af_cjk_hints_init( AF_GlyphHints hints, | |
AF_CJKMetrics metrics ); | |
FT_LOCAL( FT_Error ) | |
af_cjk_hints_apply( FT_UInt glyph_index, | |
AF_GlyphHints hints, | |
FT_Outline* outline, | |
AF_CJKMetrics metrics ); | |
/* shared; called from afindic.c */ | |
FT_LOCAL( void ) | |
af_cjk_metrics_check_digits( AF_CJKMetrics metrics, | |
FT_Face face ); | |
FT_LOCAL( void ) | |
af_cjk_metrics_init_widths( AF_CJKMetrics metrics, | |
FT_Face face ); | |
#endif /* AF_CONFIG_OPTION_CJK */ | |
/* */ | |
FT_END_HEADER | |
#endif /* __AFCJK_H__ */ | |
/* END */ |