| #ifndef __AFTYPES_H__ |
| #define __AFTYPES_H__ |
| |
| #include <ft2build.h> |
| #include FT_FREETYPE_H |
| #include FT_OUTLINE_H |
| #include FT_INTERNAL_OBJECTS_H |
| #include FT_INTERNAL_DEBUG_H |
| |
| FT_BEGIN_HEADER |
| |
| /**************************************************************************/ |
| /**************************************************************************/ |
| /***** *****/ |
| /***** D E B U G G I N G *****/ |
| /***** *****/ |
| /**************************************************************************/ |
| /**************************************************************************/ |
| |
| #define xxAF_DEBUG |
| |
| #ifdef AF_DEBUG |
| |
| # include <stdio.h> |
| # define AF_LOG( x ) printf x |
| |
| #else |
| |
| # define AF_LOG( x ) do ; while ( 0 ) /* nothing */ |
| |
| #endif /* AF_DEBUG */ |
| |
| /**************************************************************************/ |
| /**************************************************************************/ |
| /***** *****/ |
| /***** U T I L I T Y *****/ |
| /***** *****/ |
| /**************************************************************************/ |
| /**************************************************************************/ |
| |
| typedef struct AF_WidthRec_ |
| { |
| FT_Pos org; /* original position/width in font units */ |
| FT_Pos cur; /* current/scaled position/width in device sub-pixels */ |
| FT_Pos fit; /* current/fitted position/width in device sub-pixels */ |
| |
| } AF_WidthRec, *AF_Width; |
| |
| |
| FT_LOCAL( void ) |
| af_sort_pos( FT_UInt count, |
| FT_Pos* table ); |
| |
| FT_LOCAL( void ) |
| af_sort_widths( FT_UInt count, |
| AF_Width widths ); |
| |
| |
| /**************************************************************************/ |
| /**************************************************************************/ |
| /***** *****/ |
| /***** A N G L E T Y P E S *****/ |
| /***** *****/ |
| /**************************************************************************/ |
| /**************************************************************************/ |
| |
| /* |
| * Angle type. The auto-fitter doesn't need a very high angular accuracy, |
| * and this allows us to speed up some computations considerably with a |
| * light Cordic algorithm (see afangles.c) |
| * |
| */ |
| |
| typedef FT_Int AF_Angle; |
| |
| #define AF_ANGLE_PI 128 |
| #define AF_ANGLE_2PI (AF_ANGLE_PI*2) |
| #define AF_ANGLE_PI2 (AF_ANGLE_PI/2) |
| #define AF_ANGLE_PI4 (AF_ANGLE_PI/4) |
| |
| /* |
| * compute the angle of a given 2-D vector |
| * |
| */ |
| FT_LOCAL( AF_Angle ) |
| af_angle_atan( FT_Pos dx, |
| FT_Pos dy ); |
| |
| |
| /* |
| * computes "angle2 - angle1", the result is always within |
| * the range [ -AF_ANGLE_PI .. AF_ANGLE_PI-1 ] |
| * |
| */ |
| FT_LOCAL( AF_Angle ) |
| af_angle_diff( AF_Angle angle1, |
| AF_Angle angle2 ); |
| |
| |
| /**************************************************************************/ |
| /**************************************************************************/ |
| /***** *****/ |
| /***** O U T L I N E S *****/ |
| /***** *****/ |
| /**************************************************************************/ |
| /**************************************************************************/ |
| |
| /* opaque handle to glyph-specific hints. see "afhints.h" for more |
| * details |
| */ |
| typedef struct AF_GlyphHintsRec_* AF_GlyphHints; |
| |
| /* this structure is used to model an input glyph outline to |
| * the auto-hinter. The latter will set the "hints" field |
| * depending on the glyph's script |
| */ |
| typedef struct AF_OutlineRec_ |
| { |
| FT_Face face; |
| FT_Outline outline; |
| FT_UInt outline_resolution; |
| |
| FT_Int advance; |
| FT_UInt metrics_resolution; |
| |
| AF_GlyphHints hints; |
| |
| } AF_OutlineRec; |
| |
| |
| /**************************************************************************/ |
| /**************************************************************************/ |
| /***** *****/ |
| /***** S C A L E R S *****/ |
| /***** *****/ |
| /**************************************************************************/ |
| /**************************************************************************/ |
| |
| /* |
| * A scaler models the target pixel device that will receive the |
| * auto-hinted glyph image |
| * |
| */ |
| |
| typedef enum |
| { |
| AF_SCALER_FLAG_NO_HORIZONTAL = 1, /* disable horizontal hinting */ |
| AF_SCALER_FLAG_NO_VERTICAL = 2, /* disable vertical hinting */ |
| AF_SCALER_FLAG_NO_ADVANCE = 4 /* disable advance hinting */ |
| |
| } AF_ScalerFlags; |
| |
| |
| typedef struct AF_ScalerRec_ |
| { |
| FT_Face face; /* source font face */ |
| FT_Fixed x_scale; /* from font units to 1/64th device pixels */ |
| FT_Fixed y_scale; /* from font units to 1/64th device pixels */ |
| FT_Pos x_delta; /* in 1/64th device pixels */ |
| FT_Pos y_delta; /* in 1/64th device pixels */ |
| FT_Render_Mode render_mode; /* monochrome, anti-aliased, LCD, etc.. */ |
| FT_UInt32 flags; /* additionnal control flags, see above */ |
| |
| } AF_ScalerRec, *AF_Scaler; |
| |
| |
| |
| /**************************************************************************/ |
| /**************************************************************************/ |
| /***** *****/ |
| /***** S C R I P T S *****/ |
| /***** *****/ |
| /**************************************************************************/ |
| /**************************************************************************/ |
| |
| /* |
| * the list of know scripts. Each different script correspond to the |
| * following information: |
| * |
| * - a set of Unicode ranges to test weither the face supports the |
| * script |
| * |
| * - a specific global analyzer that will compute global metrics |
| * specific to the script. |
| * |
| * - a specific glyph analyzer that will compute segments and |
| * edges for each glyph covered by the script |
| * |
| * - a specific grid-fitting algorithm that will distort the |
| * scaled glyph outline according to the results of the glyph |
| * analyzer |
| * |
| * note that a given analyzer and/or grid-fitting algorithm can be |
| * used by more than one script |
| */ |
| typedef enum |
| { |
| AF_SCRIPT_NONE = 0, |
| AF_SCRIPT_LATIN = 1, |
| /* add new scripts here. don't forget to update the list in "afglobal.c" */ |
| |
| AF_SCRIPT_MAX /* do not remove */ |
| |
| } AF_Script; |
| |
| |
| |
| typedef struct AF_ScriptClassRec_ const* AF_ScriptClass; |
| |
| typedef struct AF_ScriptMetricsRec_ |
| { |
| AF_ScriptClass clazz; |
| AF_ScalerRec scaler; |
| |
| } AF_ScriptMetricsRec, *AF_ScriptMetrics; |
| |
| |
| /* this function parses a FT_Face to compute global metrics for |
| * a specific script |
| */ |
| typedef FT_Error (*AF_Script_InitMetricsFunc)( AF_ScriptMetrics metrics, |
| FT_Face face ); |
| |
| typedef void (*AF_Script_ScaleMetricsFunc)( AF_ScriptMetrics metrics, |
| AF_Scaler scaler ); |
| |
| typedef void (*AF_Script_DoneMetricsFunc)( AF_ScriptMetrics metrics ); |
| |
| |
| typedef FT_Error (*AF_Script_InitHintsFunc)( AF_GlyphHints hints, |
| FT_Outline* outline, |
| AF_ScriptMetrics metrics ); |
| |
| typedef void (*AF_Script_ApplyHintsFunc)( AF_GlyphHints hints, |
| FT_Outline* outline, |
| AF_ScriptMetrics metrics ); |
| |
| |
| typedef struct AF_Script_UniRangeRec_ |
| { |
| FT_UInt32 first; |
| FT_UInt32 last; |
| |
| } AF_Script_UniRangeRec; |
| |
| typedef const AF_Script_UniRangeRec * AF_Script_UniRange; |
| |
| typedef struct AF_ScriptClassRec_ |
| { |
| AF_Script script; |
| AF_Script_UniRange script_uni_ranges; /* last must be { 0, 0 } */ |
| |
| FT_UInt script_metrics_size; |
| AF_Script_InitMetricsFunc script_metrics_init; |
| AF_Script_ScaleMetricsFunc script_metrics_scale; |
| AF_Script_DoneMetricsFunc script_metrics_done; |
| |
| AF_Script_InitHintsFunc script_hints_init; |
| AF_Script_ApplyHintsFunc script_hints_apply; |
| |
| } AF_ScriptClassRec; |
| |
| |
| /* */ |
| |
| FT_END_HEADER |
| |
| #endif /* __AFTYPES_H__ */ |
