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/***************************************************************************/
/* */
/* pshalgo2.h */
/* */
/* PostScript hinting algorithm 2 (specification). */
/* */
/* Copyright 2001 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 __PSHALGO2_H__
#define __PSHALGO2_H__
#include "pshrec.h"
#include "pshglob.h"
#include FT_TRIGONOMETRY_H
FT_BEGIN_HEADER
typedef struct PSH2_HintRec_* PSH2_Hint;
typedef enum
{
PSH2_HINT_GHOST = PS_HINT_FLAG_GHOST,
PSH2_HINT_BOTTOM = PS_HINT_FLAG_BOTTOM,
PSH2_HINT_ACTIVE = 4,
PSH2_HINT_FITTED = 8
} PSH2_Hint_Flags;
#define psh2_hint_is_active( x ) ( ( (x)->flags & PSH2_HINT_ACTIVE ) != 0 )
#define psh2_hint_is_ghost( x ) ( ( (x)->flags & PSH2_HINT_GHOST ) != 0 )
#define psh2_hint_is_fitted( x ) ( ( (x)->flags & PSH2_HINT_FITTED ) != 0 )
#define psh2_hint_activate( x ) (x)->flags |= PSH2_HINT_ACTIVE
#define psh2_hint_deactivate( x ) (x)->flags &= ~PSH2_HINT_ACTIVE
#define psh2_hint_set_fitted( x ) (x)->flags |= PSH2_HINT_FITTED
typedef struct PSH2_HintRec_
{
FT_Int org_pos;
FT_Int org_len;
FT_Pos cur_pos;
FT_Pos cur_len;
FT_UInt flags;
PSH2_Hint parent;
FT_Int order;
} PSH2_HintRec;
/* this is an interpolation zone used for strong points; */
/* weak points are interpolated according to their strong */
/* neighbours */
typedef struct PSH2_ZoneRec_
{
FT_Fixed scale;
FT_Fixed delta;
FT_Pos min;
FT_Pos max;
} PSH2_ZoneRec, *PSH2_Zone;
typedef struct PSH2_Hint_TableRec_
{
FT_UInt max_hints;
FT_UInt num_hints;
PSH2_Hint hints;
PSH2_Hint* sort;
PSH2_Hint* sort_global;
FT_UInt num_zones;
PSH2_Zone zones;
PSH2_Zone zone;
PS_Mask_Table hint_masks;
PS_Mask_Table counter_masks;
} PSH2_Hint_TableRec, *PSH2_Hint_Table;
typedef struct PSH2_PointRec_* PSH2_Point;
typedef struct PSH2_ContourRec_* PSH2_Contour;
enum
{
PSH2_DIR_NONE = 4,
PSH2_DIR_UP = 1,
PSH2_DIR_DOWN = -1,
PSH2_DIR_LEFT = -2,
PSH2_DIR_RIGHT = 2
};
enum
{
PSH2_POINT_OFF = 1, /* point is off the curve */
PSH2_POINT_STRONG = 2, /* point is strong */
PSH2_POINT_SMOOTH = 4, /* point is smooth */
PSH2_POINT_FITTED = 8 /* point is already fitted */
};
typedef struct PSH2_PointRec_
{
PSH2_Point prev;
PSH2_Point next;
PSH2_Contour contour;
FT_UInt flags;
FT_Char dir_in;
FT_Char dir_out;
FT_Angle angle_in;
FT_Angle angle_out;
PSH2_Hint hint;
FT_Pos org_u;
FT_Pos cur_u;
#ifdef DEBUG_HINTER
FT_Pos org_x;
FT_Pos cur_x;
FT_Pos org_y;
FT_Pos cur_y;
FT_UInt flags_x;
FT_UInt flags_y;
#endif
} PSH2_PointRec;
#define psh2_point_is_strong( p ) ( (p)->flags & PSH2_POINT_STRONG )
#define psh2_point_is_fitted( p ) ( (p)->flags & PSH2_POINT_FITTED )
#define psh2_point_is_smooth( p ) ( (p)->flags & PSH2_POINT_SMOOTH )
#define psh2_point_set_strong( p ) (p)->flags |= PSH2_POINT_STRONG
#define psh2_point_set_fitted( p ) (p)->flags |= PSH2_POINT_FITTED
#define psh2_point_set_smooth( p ) (p)->flags |= PSH2_POINT_SMOOTH
typedef struct PSH2_ContourRec_
{
PSH2_Point start;
FT_UInt count;
} PSH2_ContourRec;
typedef struct PSH2_GlyphRec_
{
FT_UInt num_points;
FT_UInt num_contours;
PSH2_Point points;
PSH2_Contour contours;
FT_Memory memory;
FT_Outline* outline;
PSH_Globals globals;
PSH2_Hint_TableRec hint_tables[2];
FT_Bool vertical;
FT_Int major_dir;
FT_Int minor_dir;
} PSH2_GlyphRec, *PSH2_Glyph;
#ifdef DEBUG_HINTER
extern PSH2_Hint_Table ps2_debug_hint_table;
typedef void
(*PSH2_HintFunc)( PSH2_Hint hint,
FT_Bool vertical );
extern PSH2_HintFunc ps2_debug_hint_func;
extern PSH2_Glyph ps2_debug_glyph;
#endif
extern FT_Error
ps2_hints_apply( PS_Hints ps_hints,
FT_Outline* outline,
PSH_Globals globals );
FT_END_HEADER
#endif /* __PSHALGO2_H__ */
/* END */
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