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-rw-r--r--src/pshinter/pshalgo.h255
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diff --git a/src/pshinter/pshalgo.h b/src/pshinter/pshalgo.h
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--- a/src/pshinter/pshalgo.h
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-/***************************************************************************/
-/* */
-/* 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 */
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