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Diffstat (limited to 'libfreetype/pshalgo2.h')
| -rw-r--r-- | libfreetype/pshalgo2.h | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/libfreetype/pshalgo2.h b/libfreetype/pshalgo2.h new file mode 100644 index 00000000..405d34b5 --- /dev/null +++ b/libfreetype/pshalgo2.h @@ -0,0 +1,203 @@ +/***************************************************************************/ +/* */ +/* 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 */ |