ref: 12ef831fc314518bff45278008a568608501a8e4
dir: /src/autofit/afcjk.h/
/**************************************************************************** * * afcjk.h * * Auto-fitter hinting routines for CJK writing system (specification). * * Copyright (C) 2006-2021 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 */