XFA: merge patch from CL 817753002
[pdfium.git] / core / src / fxge / fx_freetype / fxft2.5.01 / src / pshinter / pshglob.h
1 /***************************************************************************/
2 /*                                                                         */
3 /*  pshglob.h                                                              */
4 /*                                                                         */
5 /*    PostScript hinter global hinting management.                         */
6 /*                                                                         */
7 /*  Copyright 2001, 2002, 2003 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 __PSHGLOB_H__
20 #define __PSHGLOB_H__
21
22
23 #include "../../include/freetype/freetype.h"
24 #include "../../include/freetype/internal/pshints.h"
25
26
27 FT_BEGIN_HEADER
28
29
30   /*************************************************************************/
31   /*************************************************************************/
32   /*****                                                               *****/
33   /*****                    GLOBAL HINTS INTERNALS                     *****/
34   /*****                                                               *****/
35   /*************************************************************************/
36   /*************************************************************************/
37
38
39   /*************************************************************************/
40   /*                                                                       */
41   /* @constant:                                                            */
42   /*    PS_GLOBALS_MAX_BLUE_ZONES                                          */
43   /*                                                                       */
44   /* @description:                                                         */
45   /*    The maximum number of blue zones in a font global hints structure. */
46   /*    See @PS_Globals_BluesRec.                                          */
47   /*                                                                       */
48 #define PS_GLOBALS_MAX_BLUE_ZONES  16
49
50
51   /*************************************************************************/
52   /*                                                                       */
53   /* @constant:                                                            */
54   /*    PS_GLOBALS_MAX_STD_WIDTHS                                          */
55   /*                                                                       */
56   /* @description:                                                         */
57   /*    The maximum number of standard and snap widths in either the       */
58   /*    horizontal or vertical direction.  See @PS_Globals_WidthsRec.      */
59   /*                                                                       */
60 #define PS_GLOBALS_MAX_STD_WIDTHS  16
61
62
63   /* standard and snap width */
64   typedef struct  PSH_WidthRec_
65   {
66     FT_Int  org;
67     FT_Pos  cur;
68     FT_Pos  fit;
69
70   } PSH_WidthRec, *PSH_Width;
71
72
73   /* standard and snap widths table */
74   typedef struct  PSH_WidthsRec_
75   {
76     FT_UInt       count;
77     PSH_WidthRec  widths[PS_GLOBALS_MAX_STD_WIDTHS];
78
79   } PSH_WidthsRec, *PSH_Widths;
80
81
82   typedef struct  PSH_DimensionRec_
83   {
84     PSH_WidthsRec  stdw;
85     FT_Fixed       scale_mult;
86     FT_Fixed       scale_delta;
87
88   } PSH_DimensionRec, *PSH_Dimension;
89
90
91   /* blue zone descriptor */
92   typedef struct  PSH_Blue_ZoneRec_
93   {
94     FT_Int  org_ref;
95     FT_Int  org_delta;
96     FT_Int  org_top;
97     FT_Int  org_bottom;
98
99     FT_Pos  cur_ref;
100     FT_Pos  cur_delta;
101     FT_Pos  cur_bottom;
102     FT_Pos  cur_top;
103
104   } PSH_Blue_ZoneRec, *PSH_Blue_Zone;
105
106
107   typedef struct  PSH_Blue_TableRec_
108   {
109     FT_UInt           count;
110     PSH_Blue_ZoneRec  zones[PS_GLOBALS_MAX_BLUE_ZONES];
111
112   } PSH_Blue_TableRec, *PSH_Blue_Table;
113
114
115   /* blue zones table */
116   typedef struct  PSH_BluesRec_
117   {
118     PSH_Blue_TableRec  normal_top;
119     PSH_Blue_TableRec  normal_bottom;
120     PSH_Blue_TableRec  family_top;
121     PSH_Blue_TableRec  family_bottom;
122
123     FT_Fixed           blue_scale;
124     FT_Int             blue_shift;
125     FT_Int             blue_threshold;
126     FT_Int             blue_fuzz;
127     FT_Bool            no_overshoots;
128
129   } PSH_BluesRec, *PSH_Blues;
130
131
132   /* font globals.                                         */
133   /* dimension 0 => X coordinates + vertical hints/stems   */
134   /* dimension 1 => Y coordinates + horizontal hints/stems */
135   typedef struct  PSH_GlobalsRec_
136   {
137     FT_Memory         memory;
138     PSH_DimensionRec  dimension[2];
139     PSH_BluesRec      blues;
140
141   } PSH_GlobalsRec;
142
143
144 #define PSH_BLUE_ALIGN_NONE  0
145 #define PSH_BLUE_ALIGN_TOP   1
146 #define PSH_BLUE_ALIGN_BOT   2
147
148
149   typedef struct  PSH_AlignmentRec_
150   {
151     int     align;
152     FT_Pos  align_top;
153     FT_Pos  align_bot;
154
155   } PSH_AlignmentRec, *PSH_Alignment;
156
157
158   FT_LOCAL( void )
159   psh_globals_funcs_init( PSH_Globals_FuncsRec*  funcs );
160
161
162 #if 0
163   /* snap a stem width to fitter coordinates.  `org_width' is in font */
164   /* units.  The result is in device pixels (26.6 format).            */
165   FT_LOCAL( FT_Pos )
166   psh_dimension_snap_width( PSH_Dimension  dimension,
167                             FT_Int         org_width );
168 #endif
169
170   FT_LOCAL( FT_Error )
171   psh_globals_set_scale( PSH_Globals  globals,
172                          FT_Fixed     x_scale,
173                          FT_Fixed     y_scale,
174                          FT_Fixed     x_delta,
175                          FT_Fixed     y_delta );
176
177   /* snap a stem to one or two blue zones */
178   FT_LOCAL( void )
179   psh_blues_snap_stem( PSH_Blues      blues,
180                        FT_Int         stem_top,
181                        FT_Int         stem_bot,
182                        PSH_Alignment  alignment );
183   /* */
184
185 #ifdef DEBUG_HINTER
186   extern PSH_Globals  ps_debug_globals;
187 #endif
188
189
190 FT_END_HEADER
191
192
193 #endif /* __PSHGLOB_H__ */
194
195
196 /* END */