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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_Render_Mode hint_mode );
- FT_END_HEADER
- #endif /* __PSHALGO2_H__ */
- /* END */
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