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kc3-lang/freetype/src/pshinter/pshalgo.h
Werner Lemberg
- src/pshinter/pshalgo.h
-
/***************************************************************************/ /* */ /* pshalgo.h */ /* */ /* PostScript hinting algorithm (specification). */ /* */ /* Copyright 2001, 2002, 2003, 2008 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 __PSHALGO_H__ #define __PSHALGO_H__ #include "pshrec.h" #include "pshglob.h" #include FT_TRIGONOMETRY_H FT_BEGIN_HEADER /* handle to Hint structure */ typedef struct PSH_HintRec_* PSH_Hint; /* hint bit-flags */ typedef enum PSH_Hint_Flags_ { PSH_HINT_GHOST = PS_HINT_FLAG_GHOST, PSH_HINT_BOTTOM = PS_HINT_FLAG_BOTTOM, PSH_HINT_ACTIVE = 4, PSH_HINT_FITTED = 8 } PSH_Hint_Flags; #define psh_hint_is_active( x ) ( ( (x)->flags & PSH_HINT_ACTIVE ) != 0 ) #define psh_hint_is_ghost( x ) ( ( (x)->flags & PSH_HINT_GHOST ) != 0 ) #define psh_hint_is_fitted( x ) ( ( (x)->flags & PSH_HINT_FITTED ) != 0 ) #define psh_hint_activate( x ) (x)->flags |= PSH_HINT_ACTIVE #define psh_hint_deactivate( x ) (x)->flags &= ~PSH_HINT_ACTIVE #define psh_hint_set_fitted( x ) (x)->flags |= PSH_HINT_FITTED /* hint structure */ typedef struct PSH_HintRec_ { FT_Int org_pos; FT_Int org_len; FT_Pos cur_pos; FT_Pos cur_len; FT_UInt flags; PSH_Hint parent; FT_Int order; } PSH_HintRec; /* this is an interpolation zone used for strong points; */ /* weak points are interpolated according to their strong */ /* neighbours */ typedef struct PSH_ZoneRec_ { FT_Fixed scale; FT_Fixed delta; FT_Pos min; FT_Pos max; } PSH_ZoneRec, *PSH_Zone; typedef struct PSH_Hint_TableRec_ { FT_UInt max_hints; FT_UInt num_hints; PSH_Hint hints; PSH_Hint* sort; PSH_Hint* sort_global; FT_UInt num_zones; PSH_ZoneRec* zones; PSH_Zone zone; PS_Mask_Table hint_masks; PS_Mask_Table counter_masks; } PSH_Hint_TableRec, *PSH_Hint_Table; typedef struct PSH_PointRec_* PSH_Point; typedef struct PSH_ContourRec_* PSH_Contour; enum { PSH_DIR_NONE = 4, PSH_DIR_UP = -1, PSH_DIR_DOWN = 1, PSH_DIR_LEFT = -2, PSH_DIR_RIGHT = 2 }; #define PSH_DIR_HORIZONTAL 2 #define PSH_DIR_VERTICAL 1 #define PSH_DIR_COMPARE( d1, d2 ) ( (d1) == (d2) || (d1) == -(d2) ) #define PSH_DIR_IS_HORIZONTAL( d ) PSH_DIR_COMPARE( d, PSH_DIR_HORIZONTAL ) #define PSH_DIR_IS_VERTICAL( d ) PSH_DIR_COMPARE( d, PSH_DIR_VERTICAL ) /* the following bit-flags are computed once by the glyph */ /* analyzer, for both dimensions */ enum { PSH_POINT_OFF = 1, /* point is off the curve */ PSH_POINT_SMOOTH = 2, /* point is smooth */ PSH_POINT_INFLEX = 4 /* point is inflection */ }; #define psh_point_is_smooth( p ) ( (p)->flags & PSH_POINT_SMOOTH ) #define psh_point_is_off( p ) ( (p)->flags & PSH_POINT_OFF ) #define psh_point_is_inflex( p ) ( (p)->flags & PSH_POINT_INFLEX ) #define psh_point_set_smooth( p ) (p)->flags |= PSH_POINT_SMOOTH #define psh_point_set_off( p ) (p)->flags |= PSH_POINT_OFF #define psh_point_set_inflex( p ) (p)->flags |= PSH_POINT_INFLEX /* the following bit-flags are re-computed for each dimension */ enum { PSH_POINT_STRONG = 16, /* point is strong */ PSH_POINT_FITTED = 32, /* point is already fitted */ PSH_POINT_EXTREMUM = 64, /* point is local extremum */ PSH_POINT_POSITIVE = 128, /* extremum has positive contour flow */ PSH_POINT_NEGATIVE = 256, /* extremum has negative contour flow */ PSH_POINT_EDGE_MIN = 512, /* point is aligned to left/bottom stem edge */ PSH_POINT_EDGE_MAX = 1024 /* point is aligned to top/right stem edge */ }; #define psh_point_is_strong( p ) ( (p)->flags2 & PSH_POINT_STRONG ) #define psh_point_is_fitted( p ) ( (p)->flags2 & PSH_POINT_FITTED ) #define psh_point_is_extremum( p ) ( (p)->flags2 & PSH_POINT_EXTREMUM ) #define psh_point_is_positive( p ) ( (p)->flags2 & PSH_POINT_POSITIVE ) #define psh_point_is_negative( p ) ( (p)->flags2 & PSH_POINT_NEGATIVE ) #define psh_point_is_edge_min( p ) ( (p)->flags2 & PSH_POINT_EDGE_MIN ) #define psh_point_is_edge_max( p ) ( (p)->flags2 & PSH_POINT_EDGE_MAX ) #define psh_point_set_strong( p ) (p)->flags2 |= PSH_POINT_STRONG #define psh_point_set_fitted( p ) (p)->flags2 |= PSH_POINT_FITTED #define psh_point_set_extremum( p ) (p)->flags2 |= PSH_POINT_EXTREMUM #define psh_point_set_positive( p ) (p)->flags2 |= PSH_POINT_POSITIVE #define psh_point_set_negative( p ) (p)->flags2 |= PSH_POINT_NEGATIVE #define psh_point_set_edge_min( p ) (p)->flags2 |= PSH_POINT_EDGE_MIN #define psh_point_set_edge_max( p ) (p)->flags2 |= PSH_POINT_EDGE_MAX typedef struct PSH_PointRec_ { PSH_Point prev; PSH_Point next; PSH_Contour contour; FT_UInt flags; FT_UInt flags2; FT_Char dir_in; FT_Char dir_out; FT_Angle angle_in; FT_Angle angle_out; PSH_Hint hint; FT_Pos org_u; FT_Pos org_v; 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 } PSH_PointRec; #define PSH_POINT_EQUAL_ORG( a, b ) ( (a)->org_u == (b)->org_u && \ (a)->org_v == (b)->org_v ) #define PSH_POINT_ANGLE( a, b ) FT_Atan2( (b)->org_u - (a)->org_u, \ (b)->org_v - (a)->org_v ) typedef struct PSH_ContourRec_ { PSH_Point start; FT_UInt count; } PSH_ContourRec; typedef struct PSH_GlyphRec_ { FT_UInt num_points; FT_UInt num_contours; PSH_Point points; PSH_Contour contours; FT_Memory memory; FT_Outline* outline; PSH_Globals globals; PSH_Hint_TableRec hint_tables[2]; FT_Bool vertical; FT_Int major_dir; FT_Int minor_dir; FT_Bool do_horz_hints; FT_Bool do_vert_hints; FT_Bool do_horz_snapping; FT_Bool do_vert_snapping; FT_Bool do_stem_adjust; } PSH_GlyphRec, *PSH_Glyph; #ifdef DEBUG_HINTER extern PSH_Hint_Table ps_debug_hint_table; typedef void (*PSH_HintFunc)( PSH_Hint hint, FT_Bool vertical ); extern PSH_HintFunc ps_debug_hint_func; extern PSH_Glyph ps_debug_glyph; #endif extern FT_Error ps_hints_apply( PS_Hints ps_hints, FT_Outline* outline, PSH_Globals globals, FT_Render_Mode hint_mode ); FT_END_HEADER #endif /* __PSHALGO_H__ */ /* END */