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pshalgo.h
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1 /***************************************************************************/
2 /* */
3 /* pshalgo.h */
4 /* */
5 /* PostScript hinting algorithm (specification). */
6 /* */
7 /* Copyright 2001-2018 by */
8 /* David Turner, Robert Wilhelm, and Werner Lemberg. */
9 /* */
10 /* This file is part of the FreeType project, and may only be used, */
11 /* modified, and distributed under the terms of the FreeType project */
12 /* license, LICENSE.TXT. By continuing to use, modify, or distribute */
13 /* this file you indicate that you have read the license and */
14 /* understand and accept it fully. */
15 /* */
16 /***************************************************************************/
17 
18 
19 #ifndef PSHALGO_H_
20 #define PSHALGO_H_
21 
22 
23 #include "pshrec.h"
24 #include "pshglob.h"
25 
26 
28 
29 
30  /* handle to Hint structure */
31  typedef struct PSH_HintRec_* PSH_Hint;
32 
33 
34  /* hint bit-flags */
35 #define PSH_HINT_GHOST PS_HINT_FLAG_GHOST
36 #define PSH_HINT_BOTTOM PS_HINT_FLAG_BOTTOM
37 #define PSH_HINT_ACTIVE 4U
38 #define PSH_HINT_FITTED 8U
39 
40 
41 #define psh_hint_is_active( x ) ( ( (x)->flags & PSH_HINT_ACTIVE ) != 0 )
42 #define psh_hint_is_ghost( x ) ( ( (x)->flags & PSH_HINT_GHOST ) != 0 )
43 #define psh_hint_is_fitted( x ) ( ( (x)->flags & PSH_HINT_FITTED ) != 0 )
44 
45 #define psh_hint_activate( x ) (x)->flags |= PSH_HINT_ACTIVE
46 #define psh_hint_deactivate( x ) (x)->flags &= ~PSH_HINT_ACTIVE
47 #define psh_hint_set_fitted( x ) (x)->flags |= PSH_HINT_FITTED
48 
49 
50  /* hint structure */
51  typedef struct PSH_HintRec_
52  {
60 
61  } PSH_HintRec;
62 
63 
64  /* this is an interpolation zone used for strong points; */
65  /* weak points are interpolated according to their strong */
66  /* neighbours */
67  typedef struct PSH_ZoneRec_
68  {
73 
75 
76 
77  typedef struct PSH_Hint_TableRec_
78  {
89 
91 
92 
93  typedef struct PSH_PointRec_* PSH_Point;
94  typedef struct PSH_ContourRec_* PSH_Contour;
95 
96  enum
97  {
99  PSH_DIR_UP = -1,
103  };
104 
105 #define PSH_DIR_HORIZONTAL 2
106 #define PSH_DIR_VERTICAL 1
107 
108 #define PSH_DIR_COMPARE( d1, d2 ) ( (d1) == (d2) || (d1) == -(d2) )
109 #define PSH_DIR_IS_HORIZONTAL( d ) PSH_DIR_COMPARE( d, PSH_DIR_HORIZONTAL )
110 #define PSH_DIR_IS_VERTICAL( d ) PSH_DIR_COMPARE( d, PSH_DIR_VERTICAL )
111 
112 
113  /* the following bit-flags are computed once by the glyph */
114  /* analyzer, for both dimensions */
115 #define PSH_POINT_OFF 1U /* point is off the curve */
116 #define PSH_POINT_SMOOTH 2U /* point is smooth */
117 #define PSH_POINT_INFLEX 4U /* point is inflection */
118 
119 
120 #define psh_point_is_smooth( p ) ( (p)->flags & PSH_POINT_SMOOTH )
121 #define psh_point_is_off( p ) ( (p)->flags & PSH_POINT_OFF )
122 #define psh_point_is_inflex( p ) ( (p)->flags & PSH_POINT_INFLEX )
123 
124 #define psh_point_set_smooth( p ) (p)->flags |= PSH_POINT_SMOOTH
125 #define psh_point_set_off( p ) (p)->flags |= PSH_POINT_OFF
126 #define psh_point_set_inflex( p ) (p)->flags |= PSH_POINT_INFLEX
127 
128 
129  /* the following bit-flags are re-computed for each dimension */
130 #define PSH_POINT_STRONG 16U /* point is strong */
131 #define PSH_POINT_FITTED 32U /* point is already fitted */
132 #define PSH_POINT_EXTREMUM 64U /* point is local extremum */
133 #define PSH_POINT_POSITIVE 128U /* extremum has positive contour flow */
134 #define PSH_POINT_NEGATIVE 256U /* extremum has negative contour flow */
135 #define PSH_POINT_EDGE_MIN 512U /* point is aligned to left/bottom stem edge */
136 #define PSH_POINT_EDGE_MAX 1024U /* point is aligned to top/right stem edge */
137 
138 
139 #define psh_point_is_strong( p ) ( (p)->flags2 & PSH_POINT_STRONG )
140 #define psh_point_is_fitted( p ) ( (p)->flags2 & PSH_POINT_FITTED )
141 #define psh_point_is_extremum( p ) ( (p)->flags2 & PSH_POINT_EXTREMUM )
142 #define psh_point_is_positive( p ) ( (p)->flags2 & PSH_POINT_POSITIVE )
143 #define psh_point_is_negative( p ) ( (p)->flags2 & PSH_POINT_NEGATIVE )
144 #define psh_point_is_edge_min( p ) ( (p)->flags2 & PSH_POINT_EDGE_MIN )
145 #define psh_point_is_edge_max( p ) ( (p)->flags2 & PSH_POINT_EDGE_MAX )
146 
147 #define psh_point_set_strong( p ) (p)->flags2 |= PSH_POINT_STRONG
148 #define psh_point_set_fitted( p ) (p)->flags2 |= PSH_POINT_FITTED
149 #define psh_point_set_extremum( p ) (p)->flags2 |= PSH_POINT_EXTREMUM
150 #define psh_point_set_positive( p ) (p)->flags2 |= PSH_POINT_POSITIVE
151 #define psh_point_set_negative( p ) (p)->flags2 |= PSH_POINT_NEGATIVE
152 #define psh_point_set_edge_min( p ) (p)->flags2 |= PSH_POINT_EDGE_MIN
153 #define psh_point_set_edge_max( p ) (p)->flags2 |= PSH_POINT_EDGE_MAX
154 
155 
156  typedef struct PSH_PointRec_
157  {
169 #ifdef DEBUG_HINTER
170  FT_Pos org_x;
171  FT_Pos cur_x;
172  FT_Pos org_y;
173  FT_Pos cur_y;
174  FT_UInt flags_x;
175  FT_UInt flags_y;
176 #endif
177 
178  } PSH_PointRec;
179 
180 
181  typedef struct PSH_ContourRec_
182  {
185 
186  } PSH_ContourRec;
187 
188 
189  typedef struct PSH_GlyphRec_
190  {
193 
196 
201 
205 
211 
213 
214 
215 #ifdef DEBUG_HINTER
216  extern PSH_Hint_Table ps_debug_hint_table;
217 
218  typedef void
219  (*PSH_HintFunc)( PSH_Hint hint,
220  FT_Bool vertical );
221 
222  extern PSH_HintFunc ps_debug_hint_func;
223 
224  extern PSH_Glyph ps_debug_glyph;
225 #endif
226 
227 
228  extern FT_Error
229  ps_hints_apply( PS_Hints ps_hints,
231  PSH_Globals globals,
232  FT_Render_Mode hint_mode );
233 
234 
236 
237 
238 #endif /* PSHALGO_H_ */
239 
240 
241 /* END */
PS_Mask_Table counter_masks
Definition: pshalgo.h:88
FT_Bool do_vert_snapping
Definition: pshalgo.h:209
int FT_Error
Definition: fttypes.h:300
FT_Pos min
Definition: pshalgo.h:71
FT_BEGIN_HEADER typedef signed long FT_Pos
Definition: ftimage.h:58
struct png_info_def **typedef void(__cdecl typeof(png_destroy_read_struct))(struct png_struct_def **
Definition: typeof.h:49
struct PSH_Hint_TableRec_ * PSH_Hint_Table
#define FT_END_HEADER
Definition: ftheader.h:54
PSH_Hint * sort_global
Definition: pshalgo.h:83
signed int FT_Int
Definition: fttypes.h:220
PSH_Hint * sort
Definition: pshalgo.h:82
FT_Bool vertical
Definition: pshalgo.h:202
enum FT_Render_Mode_ FT_Render_Mode
FT_UInt num_hints
Definition: pshalgo.h:80
FT_UInt num_contours
Definition: pshalgo.h:192
signed char FT_Char
Definition: fttypes.h:143
FT_Int order
Definition: pshalgo.h:59
PSH_Point next
Definition: pshalgo.h:159
struct PSH_PointRec_ PSH_PointRec
FT_UInt num_zones
Definition: pshalgo.h:84
FT_Char dir_out
Definition: pshalgo.h:164
struct PSH_ZoneRec_ PSH_ZoneRec
FT_Pos cur_len
Definition: pshalgo.h:56
PSH_Hint parent
Definition: pshalgo.h:58
FT_Int minor_dir
Definition: pshalgo.h:204
FT_UInt max_hints
Definition: pshalgo.h:79
FT_BEGIN_HEADER typedef unsigned char FT_Bool
Definition: fttypes.h:108
struct PSH_HintRec_ PSH_HintRec
struct PSH_ContourRec_ PSH_ContourRec
FT_Pos org_u
Definition: pshalgo.h:166
FT_Memory memory
Definition: pshalgo.h:197
#define FT_BEGIN_HEADER
Definition: ftheader.h:36
PSH_Hint hint
Definition: pshalgo.h:165
FT_UInt num_points
Definition: pshalgo.h:191
FT_Int org_pos
Definition: pshalgo.h:53
typedefFT_BEGIN_HEADER struct PSH_HintRec_ * PSH_Hint
Definition: pshalgo.h:31
PS_Mask_Table hint_masks
Definition: pshalgo.h:87
struct PSH_ZoneRec_ * PSH_Zone
FT_Bool do_vert_hints
Definition: pshalgo.h:207
FT_Int org_len
Definition: pshalgo.h:54
FT_UInt flags2
Definition: pshalgo.h:162
PSH_Hint hints
Definition: pshalgo.h:81
FT_Fixed scale
Definition: pshalgo.h:69
FT_Int major_dir
Definition: pshalgo.h:203
PSH_Zone zone
Definition: pshalgo.h:86
PSH_Point start
Definition: pshalgo.h:183
FT_Pos cur_pos
Definition: pshalgo.h:55
FT_Bool do_horz_snapping
Definition: pshalgo.h:208
FT_Pos max
Definition: pshalgo.h:72
FT_Error ps_hints_apply(PS_Hints ps_hints, FT_Outline *outline, PSH_Globals globals, FT_Render_Mode hint_mode)
Definition: pshalgo.c:2070
FT_Bool do_stem_adjust
Definition: pshalgo.h:210
typedefFT_BEGIN_HEADER struct FT_MemoryRec_ * FT_Memory
Definition: ftsystem.h:66
PSH_Point points
Definition: pshalgo.h:194
struct PSH_PointRec_ * PSH_Point
Definition: pshalgo.h:93
Definition: mesh.c:5329
PSH_Contour contour
Definition: pshalgo.h:160
FT_Bool do_horz_hints
Definition: pshalgo.h:206
FT_UInt count
Definition: pshalgo.h:184
signed long FT_Fixed
Definition: fttypes.h:288
PSH_Point prev
Definition: pshalgo.h:158
DWORD hint
Definition: vfdcmd.c:88
PSH_Hint_TableRec hint_tables[2]
Definition: pshalgo.h:200
unsigned int FT_UInt
Definition: fttypes.h:231
FT_Char dir_in
Definition: pshalgo.h:163
FT_UInt flags
Definition: pshalgo.h:161
PSH_Contour contours
Definition: pshalgo.h:195
struct PSH_GlyphRec_ * PSH_Glyph
PSH_ZoneRec * zones
Definition: pshalgo.h:85
PSH_Globals globals
Definition: pshalgo.h:199
FT_Fixed delta
Definition: pshalgo.h:70
FT_Outline * outline
Definition: pshalgo.h:198
struct PSH_ContourRec_ * PSH_Contour
Definition: pshalgo.h:94
FT_UInt flags
Definition: pshalgo.h:57
FT_Pos cur_u
Definition: pshalgo.h:168
struct PSH_GlyphRec_ PSH_GlyphRec
struct PSH_Hint_TableRec_ PSH_Hint_TableRec
FT_Pos org_v
Definition: pshalgo.h:167
typedefFT_BEGIN_HEADER struct PSH_GlobalsRec_ * PSH_Globals
Definition: pshints.h:41