diff options
Diffstat (limited to 'src/autofit/afcjk.h')
| -rw-r--r-- | src/autofit/afcjk.h | 104 |
1 files changed, 94 insertions, 10 deletions
diff --git a/src/autofit/afcjk.h b/src/autofit/afcjk.h index 0b20d4a..8416c0d 100644 --- a/src/autofit/afcjk.h +++ b/src/autofit/afcjk.h @@ -4,7 +4,7 @@ /* */ /* Auto-fitter hinting routines for CJK script (specification). */ /* */ -/* Copyright 2006, 2007 by */ +/* Copyright 2006, 2007, 2011 by */ /* David Turner, Robert Wilhelm, and Werner Lemberg. */ /* */ /* This file is part of the FreeType project, and may only be used, */ @@ -20,6 +20,7 @@ #define __AFCJK_H__ #include "afhints.h" +#include "aflatin.h" FT_BEGIN_HEADER @@ -29,23 +30,106 @@ FT_BEGIN_HEADER AF_DECLARE_SCRIPT_CLASS(af_cjk_script_class) + /* CJK (global) metrics management */ + + /* + * 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. + */ + enum + { + AF_CJK_BLUE_TOP, + AF_CJK_BLUE_BOTTOM, + AF_CJK_BLUE_LEFT, + AF_CJK_BLUE_RIGHT, + + AF_CJK_BLUE_MAX + }; + + +#define AF_CJK_MAX_WIDTHS 16 +#define AF_CJK_MAX_BLUES AF_CJK_BLUE_MAX + + + enum + { + AF_CJK_BLUE_ACTIVE = 1 << 0, + AF_CJK_BLUE_IS_TOP = 1 << 1, + AF_CJK_BLUE_IS_RIGHT = 1 << 2, + AF_CJK_BLUE_ADJUSTMENT = 1 << 3, /* used for scale adjustment */ + /* optimization */ + AF_CJK_BLUE_FLAG_MAX + }; + + + 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; + AF_WidthRec widths[AF_CJK_MAX_WIDTHS]; + FT_Pos edge_distance_threshold; + FT_Pos standard_width; + FT_Bool extra_light; + + /* used for horizontal metrics too for CJK */ + FT_Bool control_overshoot; + FT_UInt blue_count; + AF_CJKBlueRec blues[AF_CJK_BLUE_MAX]; + + FT_Fixed org_scale; + FT_Pos org_delta; + + } AF_CJKAxisRec, *AF_CJKAxis; + + + typedef struct AF_CJKMetricsRec_ + { + AF_ScriptMetricsRec root; + FT_UInt units_per_em; + AF_CJKAxisRec axis[AF_DIMENSION_MAX]; + + } AF_CJKMetricsRec, *AF_CJKMetrics; + FT_LOCAL( FT_Error ) - af_cjk_metrics_init( AF_LatinMetrics metrics, - FT_Face face ); + af_cjk_metrics_init( AF_CJKMetrics metrics, + FT_Face face ); FT_LOCAL( void ) - af_cjk_metrics_scale( AF_LatinMetrics metrics, - AF_Scaler scaler ); + af_cjk_metrics_scale( AF_CJKMetrics metrics, + AF_Scaler scaler ); FT_LOCAL( FT_Error ) - af_cjk_hints_init( AF_GlyphHints hints, - AF_LatinMetrics metrics ); + af_cjk_hints_init( AF_GlyphHints hints, + AF_CJKMetrics metrics ); FT_LOCAL( FT_Error ) - af_cjk_hints_apply( AF_GlyphHints hints, - FT_Outline* outline, - AF_LatinMetrics metrics ); + af_cjk_hints_apply( 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, + FT_ULong charcode ); + /* */ |