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  • Committer: Grevutiu Gabriel
  • Date: 2017-06-13 08:43:17 UTC
  • Revision ID: gabriel1984sibiu@gmail.com-20170613084317-ek0zqe0u9g3ocvi8
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src/3rdparty/freetype/include/freetype/ftglyph.h
 
1
/***************************************************************************/
 
2
/*                                                                         */
 
3
/*  ftglyph.h                                                              */
 
4
/*                                                                         */
 
5
/*    FreeType convenience functions to handle glyphs (specification).     */
 
6
/*                                                                         */
 
7
/*  Copyright 1996-2015 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
  /*************************************************************************/
 
20
  /*                                                                       */
 
21
  /* This file contains the definition of several convenience functions    */
 
22
  /* that can be used by client applications to easily retrieve glyph      */
 
23
  /* bitmaps and outlines from a given face.                               */
 
24
  /*                                                                       */
 
25
  /* These functions should be optional if you are writing a font server   */
 
26
  /* or text layout engine on top of FreeType.  However, they are pretty   */
 
27
  /* handy for many other simple uses of the library.                      */
 
28
  /*                                                                       */
 
29
  /*************************************************************************/
 
30
 
 
31
 
 
32
#ifndef __FTGLYPH_H__
 
33
#define __FTGLYPH_H__
 
34
 
 
35
 
 
36
#include <ft2build.h>
 
37
#include FT_FREETYPE_H
 
38
 
 
39
#ifdef FREETYPE_H
 
40
#error "freetype.h of FreeType 1 has been loaded!"
 
41
#error "Please fix the directory search order for header files"
 
42
#error "so that freetype.h of FreeType 2 is found first."
 
43
#endif
 
44
 
 
45
 
 
46
FT_BEGIN_HEADER
 
47
 
 
48
 
 
49
  /*************************************************************************/
 
50
  /*                                                                       */
 
51
  /* <Section>                                                             */
 
52
  /*    glyph_management                                                   */
 
53
  /*                                                                       */
 
54
  /* <Title>                                                               */
 
55
  /*    Glyph Management                                                   */
 
56
  /*                                                                       */
 
57
  /* <Abstract>                                                            */
 
58
  /*    Generic interface to manage individual glyph data.                 */
 
59
  /*                                                                       */
 
60
  /* <Description>                                                         */
 
61
  /*    This section contains definitions used to manage glyph data        */
 
62
  /*    through generic FT_Glyph objects.  Each of them can contain a      */
 
63
  /*    bitmap, a vector outline, or even images in other formats.         */
 
64
  /*                                                                       */
 
65
  /*************************************************************************/
 
66
 
 
67
 
 
68
  /* forward declaration to a private type */
 
69
  typedef struct FT_Glyph_Class_  FT_Glyph_Class;
 
70
 
 
71
 
 
72
  /*************************************************************************/
 
73
  /*                                                                       */
 
74
  /* <Type>                                                                */
 
75
  /*    FT_Glyph                                                           */
 
76
  /*                                                                       */
 
77
  /* <Description>                                                         */
 
78
  /*    Handle to an object used to model generic glyph images.  It is a   */
 
79
  /*    pointer to the @FT_GlyphRec structure and can contain a glyph      */
 
80
  /*    bitmap or pointer.                                                 */
 
81
  /*                                                                       */
 
82
  /* <Note>                                                                */
 
83
  /*    Glyph objects are not owned by the library.  You must thus release */
 
84
  /*    them manually (through @FT_Done_Glyph) _before_ calling            */
 
85
  /*    @FT_Done_FreeType.                                                 */
 
86
  /*                                                                       */
 
87
  typedef struct FT_GlyphRec_*  FT_Glyph;
 
88
 
 
89
 
 
90
  /*************************************************************************/
 
91
  /*                                                                       */
 
92
  /* <Struct>                                                              */
 
93
  /*    FT_GlyphRec                                                        */
 
94
  /*                                                                       */
 
95
  /* <Description>                                                         */
 
96
  /*    The root glyph structure contains a given glyph image plus its     */
 
97
  /*    advance width in 16.16 fixed-point format.                         */
 
98
  /*                                                                       */
 
99
  /* <Fields>                                                              */
 
100
  /*    library :: A handle to the FreeType library object.                */
 
101
  /*                                                                       */
 
102
  /*    clazz   :: A pointer to the glyph's class.  Private.               */
 
103
  /*                                                                       */
 
104
  /*    format  :: The format of the glyph's image.                        */
 
105
  /*                                                                       */
 
106
  /*    advance :: A 16.16 vector that gives the glyph's advance width.    */
 
107
  /*                                                                       */
 
108
  typedef struct  FT_GlyphRec_
 
109
  {
 
110
    FT_Library             library;
 
111
    const FT_Glyph_Class*  clazz;
 
112
    FT_Glyph_Format        format;
 
113
    FT_Vector              advance;
 
114
 
 
115
  } FT_GlyphRec;
 
116
 
 
117
 
 
118
  /*************************************************************************/
 
119
  /*                                                                       */
 
120
  /* <Type>                                                                */
 
121
  /*    FT_BitmapGlyph                                                     */
 
122
  /*                                                                       */
 
123
  /* <Description>                                                         */
 
124
  /*    A handle to an object used to model a bitmap glyph image.  This is */
 
125
  /*    a sub-class of @FT_Glyph, and a pointer to @FT_BitmapGlyphRec.     */
 
126
  /*                                                                       */
 
127
  typedef struct FT_BitmapGlyphRec_*  FT_BitmapGlyph;
 
128
 
 
129
 
 
130
  /*************************************************************************/
 
131
  /*                                                                       */
 
132
  /* <Struct>                                                              */
 
133
  /*    FT_BitmapGlyphRec                                                  */
 
134
  /*                                                                       */
 
135
  /* <Description>                                                         */
 
136
  /*    A structure used for bitmap glyph images.  This really is a        */
 
137
  /*    `sub-class' of @FT_GlyphRec.                                       */
 
138
  /*                                                                       */
 
139
  /* <Fields>                                                              */
 
140
  /*    root   :: The root @FT_Glyph fields.                               */
 
141
  /*                                                                       */
 
142
  /*    left   :: The left-side bearing, i.e., the horizontal distance     */
 
143
  /*              from the current pen position to the left border of the  */
 
144
  /*              glyph bitmap.                                            */
 
145
  /*                                                                       */
 
146
  /*    top    :: The top-side bearing, i.e., the vertical distance from   */
 
147
  /*              the current pen position to the top border of the glyph  */
 
148
  /*              bitmap.  This distance is positive for upwards~y!        */
 
149
  /*                                                                       */
 
150
  /*    bitmap :: A descriptor for the bitmap.                             */
 
151
  /*                                                                       */
 
152
  /* <Note>                                                                */
 
153
  /*    You can typecast an @FT_Glyph to @FT_BitmapGlyph if you have       */
 
154
  /*    `glyph->format == FT_GLYPH_FORMAT_BITMAP'.  This lets you access   */
 
155
  /*    the bitmap's contents easily.                                      */
 
156
  /*                                                                       */
 
157
  /*    The corresponding pixel buffer is always owned by @FT_BitmapGlyph  */
 
158
  /*    and is thus created and destroyed with it.                         */
 
159
  /*                                                                       */
 
160
  typedef struct  FT_BitmapGlyphRec_
 
161
  {
 
162
    FT_GlyphRec  root;
 
163
    FT_Int       left;
 
164
    FT_Int       top;
 
165
    FT_Bitmap    bitmap;
 
166
 
 
167
  } FT_BitmapGlyphRec;
 
168
 
 
169
 
 
170
  /*************************************************************************/
 
171
  /*                                                                       */
 
172
  /* <Type>                                                                */
 
173
  /*    FT_OutlineGlyph                                                    */
 
174
  /*                                                                       */
 
175
  /* <Description>                                                         */
 
176
  /*    A handle to an object used to model an outline glyph image.  This  */
 
177
  /*    is a sub-class of @FT_Glyph, and a pointer to @FT_OutlineGlyphRec. */
 
178
  /*                                                                       */
 
179
  typedef struct FT_OutlineGlyphRec_*  FT_OutlineGlyph;
 
180
 
 
181
 
 
182
  /*************************************************************************/
 
183
  /*                                                                       */
 
184
  /* <Struct>                                                              */
 
185
  /*    FT_OutlineGlyphRec                                                 */
 
186
  /*                                                                       */
 
187
  /* <Description>                                                         */
 
188
  /*    A structure used for outline (vectorial) glyph images.  This       */
 
189
  /*    really is a `sub-class' of @FT_GlyphRec.                           */
 
190
  /*                                                                       */
 
191
  /* <Fields>                                                              */
 
192
  /*    root    :: The root @FT_Glyph fields.                              */
 
193
  /*                                                                       */
 
194
  /*    outline :: A descriptor for the outline.                           */
 
195
  /*                                                                       */
 
196
  /* <Note>                                                                */
 
197
  /*    You can typecast an @FT_Glyph to @FT_OutlineGlyph if you have      */
 
198
  /*    `glyph->format == FT_GLYPH_FORMAT_OUTLINE'.  This lets you access  */
 
199
  /*    the outline's content easily.                                      */
 
200
  /*                                                                       */
 
201
  /*    As the outline is extracted from a glyph slot, its coordinates are */
 
202
  /*    expressed normally in 26.6 pixels, unless the flag                 */
 
203
  /*    @FT_LOAD_NO_SCALE was used in @FT_Load_Glyph() or @FT_Load_Char(). */
 
204
  /*                                                                       */
 
205
  /*    The outline's tables are always owned by the object and are        */
 
206
  /*    destroyed with it.                                                 */
 
207
  /*                                                                       */
 
208
  typedef struct  FT_OutlineGlyphRec_
 
209
  {
 
210
    FT_GlyphRec  root;
 
211
    FT_Outline   outline;
 
212
 
 
213
  } FT_OutlineGlyphRec;
 
214
 
 
215
 
 
216
  /*************************************************************************/
 
217
  /*                                                                       */
 
218
  /* <Function>                                                            */
 
219
  /*    FT_Get_Glyph                                                       */
 
220
  /*                                                                       */
 
221
  /* <Description>                                                         */
 
222
  /*    A function used to extract a glyph image from a slot.  Note that   */
 
223
  /*    the created @FT_Glyph object must be released with @FT_Done_Glyph. */
 
224
  /*                                                                       */
 
225
  /* <Input>                                                               */
 
226
  /*    slot   :: A handle to the source glyph slot.                       */
 
227
  /*                                                                       */
 
228
  /* <Output>                                                              */
 
229
  /*    aglyph :: A handle to the glyph object.                            */
 
230
  /*                                                                       */
 
231
  /* <Return>                                                              */
 
232
  /*    FreeType error code.  0~means success.                             */
 
233
  /*                                                                       */
 
234
  FT_EXPORT( FT_Error )
 
235
  FT_Get_Glyph( FT_GlyphSlot  slot,
 
236
                FT_Glyph     *aglyph );
 
237
 
 
238
 
 
239
  /*************************************************************************/
 
240
  /*                                                                       */
 
241
  /* <Function>                                                            */
 
242
  /*    FT_Glyph_Copy                                                      */
 
243
  /*                                                                       */
 
244
  /* <Description>                                                         */
 
245
  /*    A function used to copy a glyph image.  Note that the created      */
 
246
  /*    @FT_Glyph object must be released with @FT_Done_Glyph.             */
 
247
  /*                                                                       */
 
248
  /* <Input>                                                               */
 
249
  /*    source :: A handle to the source glyph object.                     */
 
250
  /*                                                                       */
 
251
  /* <Output>                                                              */
 
252
  /*    target :: A handle to the target glyph object.  0~in case of       */
 
253
  /*              error.                                                   */
 
254
  /*                                                                       */
 
255
  /* <Return>                                                              */
 
256
  /*    FreeType error code.  0~means success.                             */
 
257
  /*                                                                       */
 
258
  FT_EXPORT( FT_Error )
 
259
  FT_Glyph_Copy( FT_Glyph   source,
 
260
                 FT_Glyph  *target );
 
261
 
 
262
 
 
263
  /*************************************************************************/
 
264
  /*                                                                       */
 
265
  /* <Function>                                                            */
 
266
  /*    FT_Glyph_Transform                                                 */
 
267
  /*                                                                       */
 
268
  /* <Description>                                                         */
 
269
  /*    Transform a glyph image if its format is scalable.                 */
 
270
  /*                                                                       */
 
271
  /* <InOut>                                                               */
 
272
  /*    glyph  :: A handle to the target glyph object.                     */
 
273
  /*                                                                       */
 
274
  /* <Input>                                                               */
 
275
  /*    matrix :: A pointer to a 2x2 matrix to apply.                      */
 
276
  /*                                                                       */
 
277
  /*    delta  :: A pointer to a 2d vector to apply.  Coordinates are      */
 
278
  /*              expressed in 1/64th of a pixel.                          */
 
279
  /*                                                                       */
 
280
  /* <Return>                                                              */
 
281
  /*    FreeType error code (if not 0, the glyph format is not scalable).  */
 
282
  /*                                                                       */
 
283
  /* <Note>                                                                */
 
284
  /*    The 2x2 transformation matrix is also applied to the glyph's       */
 
285
  /*    advance vector.                                                    */
 
286
  /*                                                                       */
 
287
  FT_EXPORT( FT_Error )
 
288
  FT_Glyph_Transform( FT_Glyph    glyph,
 
289
                      FT_Matrix*  matrix,
 
290
                      FT_Vector*  delta );
 
291
 
 
292
 
 
293
  /*************************************************************************/
 
294
  /*                                                                       */
 
295
  /* <Enum>                                                                */
 
296
  /*    FT_Glyph_BBox_Mode                                                 */
 
297
  /*                                                                       */
 
298
  /* <Description>                                                         */
 
299
  /*    The mode how the values of @FT_Glyph_Get_CBox are returned.        */
 
300
  /*                                                                       */
 
301
  /* <Values>                                                              */
 
302
  /*    FT_GLYPH_BBOX_UNSCALED ::                                          */
 
303
  /*      Return unscaled font units.                                      */
 
304
  /*                                                                       */
 
305
  /*    FT_GLYPH_BBOX_SUBPIXELS ::                                         */
 
306
  /*      Return unfitted 26.6 coordinates.                                */
 
307
  /*                                                                       */
 
308
  /*    FT_GLYPH_BBOX_GRIDFIT ::                                           */
 
309
  /*      Return grid-fitted 26.6 coordinates.                             */
 
310
  /*                                                                       */
 
311
  /*    FT_GLYPH_BBOX_TRUNCATE ::                                          */
 
312
  /*      Return coordinates in integer pixels.                            */
 
313
  /*                                                                       */
 
314
  /*    FT_GLYPH_BBOX_PIXELS ::                                            */
 
315
  /*      Return grid-fitted pixel coordinates.                            */
 
316
  /*                                                                       */
 
317
  typedef enum  FT_Glyph_BBox_Mode_
 
318
  {
 
319
    FT_GLYPH_BBOX_UNSCALED  = 0,
 
320
    FT_GLYPH_BBOX_SUBPIXELS = 0,
 
321
    FT_GLYPH_BBOX_GRIDFIT   = 1,
 
322
    FT_GLYPH_BBOX_TRUNCATE  = 2,
 
323
    FT_GLYPH_BBOX_PIXELS    = 3
 
324
 
 
325
  } FT_Glyph_BBox_Mode;
 
326
 
 
327
 
 
328
  /* these constants are deprecated; use the corresponding */
 
329
  /* `FT_Glyph_BBox_Mode' values instead                   */
 
330
#define ft_glyph_bbox_unscaled   FT_GLYPH_BBOX_UNSCALED
 
331
#define ft_glyph_bbox_subpixels  FT_GLYPH_BBOX_SUBPIXELS
 
332
#define ft_glyph_bbox_gridfit    FT_GLYPH_BBOX_GRIDFIT
 
333
#define ft_glyph_bbox_truncate   FT_GLYPH_BBOX_TRUNCATE
 
334
#define ft_glyph_bbox_pixels     FT_GLYPH_BBOX_PIXELS
 
335
 
 
336
 
 
337
  /*************************************************************************/
 
338
  /*                                                                       */
 
339
  /* <Function>                                                            */
 
340
  /*    FT_Glyph_Get_CBox                                                  */
 
341
  /*                                                                       */
 
342
  /* <Description>                                                         */
 
343
  /*    Return a glyph's `control box'.  The control box encloses all the  */
 
344
  /*    outline's points, including Bézier control points.  Though it      */
 
345
  /*    coincides with the exact bounding box for most glyphs, it can be   */
 
346
  /*    slightly larger in some situations (like when rotating an outline  */
 
347
  /*    that contains Bézier outside arcs).                                */
 
348
  /*                                                                       */
 
349
  /*    Computing the control box is very fast, while getting the bounding */
 
350
  /*    box can take much more time as it needs to walk over all segments  */
 
351
  /*    and arcs in the outline.  To get the latter, you can use the       */
 
352
  /*    `ftbbox' component, which is dedicated to this single task.        */
 
353
  /*                                                                       */
 
354
  /* <Input>                                                               */
 
355
  /*    glyph :: A handle to the source glyph object.                      */
 
356
  /*                                                                       */
 
357
  /*    mode  :: The mode that indicates how to interpret the returned     */
 
358
  /*             bounding box values.                                      */
 
359
  /*                                                                       */
 
360
  /* <Output>                                                              */
 
361
  /*    acbox :: The glyph coordinate bounding box.  Coordinates are       */
 
362
  /*             expressed in 1/64th of pixels if it is grid-fitted.       */
 
363
  /*                                                                       */
 
364
  /* <Note>                                                                */
 
365
  /*    Coordinates are relative to the glyph origin, using the y~upwards  */
 
366
  /*    convention.                                                        */
 
367
  /*                                                                       */
 
368
  /*    If the glyph has been loaded with @FT_LOAD_NO_SCALE, `bbox_mode'   */
 
369
  /*    must be set to @FT_GLYPH_BBOX_UNSCALED to get unscaled font        */
 
370
  /*    units in 26.6 pixel format.  The value @FT_GLYPH_BBOX_SUBPIXELS    */
 
371
  /*    is another name for this constant.                                 */
 
372
  /*                                                                       */
 
373
  /*    If the font is tricky and the glyph has been loaded with           */
 
374
  /*    @FT_LOAD_NO_SCALE, the resulting CBox is meaningless.  To get      */
 
375
  /*    reasonable values for the CBox it is necessary to load the glyph   */
 
376
  /*    at a large ppem value (so that the hinting instructions can        */
 
377
  /*    properly shift and scale the subglyphs), then extracting the CBox, */
 
378
  /*    which can be eventually converted back to font units.              */
 
379
  /*                                                                       */
 
380
  /*    Note that the maximum coordinates are exclusive, which means that  */
 
381
  /*    one can compute the width and height of the glyph image (be it in  */
 
382
  /*    integer or 26.6 pixels) as:                                        */
 
383
  /*                                                                       */
 
384
  /*    {                                                                  */
 
385
  /*      width  = bbox.xMax - bbox.xMin;                                  */
 
386
  /*      height = bbox.yMax - bbox.yMin;                                  */
 
387
  /*    }                                                                  */
 
388
  /*                                                                       */
 
389
  /*    Note also that for 26.6 coordinates, if `bbox_mode' is set to      */
 
390
  /*    @FT_GLYPH_BBOX_GRIDFIT, the coordinates will also be grid-fitted,  */
 
391
  /*    which corresponds to:                                              */
 
392
  /*                                                                       */
 
393
  /*    {                                                                  */
 
394
  /*      bbox.xMin = FLOOR(bbox.xMin);                                    */
 
395
  /*      bbox.yMin = FLOOR(bbox.yMin);                                    */
 
396
  /*      bbox.xMax = CEILING(bbox.xMax);                                  */
 
397
  /*      bbox.yMax = CEILING(bbox.yMax);                                  */
 
398
  /*    }                                                                  */
 
399
  /*                                                                       */
 
400
  /*    To get the bbox in pixel coordinates, set `bbox_mode' to           */
 
401
  /*    @FT_GLYPH_BBOX_TRUNCATE.                                           */
 
402
  /*                                                                       */
 
403
  /*    To get the bbox in grid-fitted pixel coordinates, set `bbox_mode'  */
 
404
  /*    to @FT_GLYPH_BBOX_PIXELS.                                          */
 
405
  /*                                                                       */
 
406
  FT_EXPORT( void )
 
407
  FT_Glyph_Get_CBox( FT_Glyph  glyph,
 
408
                     FT_UInt   bbox_mode,
 
409
                     FT_BBox  *acbox );
 
410
 
 
411
 
 
412
  /*************************************************************************/
 
413
  /*                                                                       */
 
414
  /* <Function>                                                            */
 
415
  /*    FT_Glyph_To_Bitmap                                                 */
 
416
  /*                                                                       */
 
417
  /* <Description>                                                         */
 
418
  /*    Convert a given glyph object to a bitmap glyph object.             */
 
419
  /*                                                                       */
 
420
  /* <InOut>                                                               */
 
421
  /*    the_glyph   :: A pointer to a handle to the target glyph.          */
 
422
  /*                                                                       */
 
423
  /* <Input>                                                               */
 
424
  /*    render_mode :: An enumeration that describes how the data is       */
 
425
  /*                   rendered.                                           */
 
426
  /*                                                                       */
 
427
  /*    origin      :: A pointer to a vector used to translate the glyph   */
 
428
  /*                   image before rendering.  Can be~0 (if no            */
 
429
  /*                   translation).  The origin is expressed in           */
 
430
  /*                   26.6 pixels.                                        */
 
431
  /*                                                                       */
 
432
  /*    destroy     :: A boolean that indicates that the original glyph    */
 
433
  /*                   image should be destroyed by this function.  It is  */
 
434
  /*                   never destroyed in case of error.                   */
 
435
  /*                                                                       */
 
436
  /* <Return>                                                              */
 
437
  /*    FreeType error code.  0~means success.                             */
 
438
  /*                                                                       */
 
439
  /* <Note>                                                                */
 
440
  /*    This function does nothing if the glyph format isn't scalable.     */
 
441
  /*                                                                       */
 
442
  /*    The glyph image is translated with the `origin' vector before      */
 
443
  /*    rendering.                                                         */
 
444
  /*                                                                       */
 
445
  /*    The first parameter is a pointer to an @FT_Glyph handle, that will */
 
446
  /*    be _replaced_ by this function (with newly allocated data).        */
 
447
  /*    Typically, you would use (omitting error handling):                */
 
448
  /*                                                                       */
 
449
  /*                                                                       */
 
450
  /*      {                                                                */
 
451
  /*        FT_Glyph        glyph;                                         */
 
452
  /*        FT_BitmapGlyph  glyph_bitmap;                                  */
 
453
  /*                                                                       */
 
454
  /*                                                                       */
 
455
  /*        // load glyph                                                  */
 
456
  /*        error = FT_Load_Char( face, glyph_index, FT_LOAD_DEFAUT );     */
 
457
  /*                                                                       */
 
458
  /*        // extract glyph image                                         */
 
459
  /*        error = FT_Get_Glyph( face->glyph, &glyph );                   */
 
460
  /*                                                                       */
 
461
  /*        // convert to a bitmap (default render mode + destroying old)  */
 
462
  /*        if ( glyph->format != FT_GLYPH_FORMAT_BITMAP )                 */
 
463
  /*        {                                                              */
 
464
  /*          error = FT_Glyph_To_Bitmap( &glyph, FT_RENDER_MODE_NORMAL,   */
 
465
  /*                                      0, 1 );                          */
 
466
  /*          if ( error ) // `glyph' unchanged                            */
 
467
  /*            ...                                                        */
 
468
  /*        }                                                              */
 
469
  /*                                                                       */
 
470
  /*        // access bitmap content by typecasting                        */
 
471
  /*        glyph_bitmap = (FT_BitmapGlyph)glyph;                          */
 
472
  /*                                                                       */
 
473
  /*        // do funny stuff with it, like blitting/drawing               */
 
474
  /*        ...                                                            */
 
475
  /*                                                                       */
 
476
  /*        // discard glyph image (bitmap or not)                         */
 
477
  /*        FT_Done_Glyph( glyph );                                        */
 
478
  /*      }                                                                */
 
479
  /*                                                                       */
 
480
  /*                                                                       */
 
481
  /*    Here another example, again without error handling:                */
 
482
  /*                                                                       */
 
483
  /*                                                                       */
 
484
  /*      {                                                                */
 
485
  /*        FT_Glyph  glyphs[MAX_GLYPHS]                                   */
 
486
  /*                                                                       */
 
487
  /*                                                                       */
 
488
  /*        ...                                                            */
 
489
  /*                                                                       */
 
490
  /*        for ( idx = 0; i < MAX_GLYPHS; i++ )                           */
 
491
  /*          error = FT_Load_Glyph( face, idx, FT_LOAD_DEFAULT ) ||       */
 
492
  /*                  FT_Get_Glyph ( face->glyph, &glyph[idx] );           */
 
493
  /*                                                                       */
 
494
  /*        ...                                                            */
 
495
  /*                                                                       */
 
496
  /*        for ( idx = 0; i < MAX_GLYPHS; i++ )                           */
 
497
  /*        {                                                              */
 
498
  /*          FT_Glyph  bitmap = glyphs[idx];                              */
 
499
  /*                                                                       */
 
500
  /*                                                                       */
 
501
  /*          ...                                                          */
 
502
  /*                                                                       */
 
503
  /*          // after this call, `bitmap' no longer points into           */
 
504
  /*          // the `glyphs' array (and the old value isn't destroyed)    */
 
505
  /*          FT_Glyph_To_Bitmap( &bitmap, FT_RENDER_MODE_MONO, 0, 0 );    */
 
506
  /*                                                                       */
 
507
  /*          ...                                                          */
 
508
  /*                                                                       */
 
509
  /*          FT_Done_Glyph( bitmap );                                     */
 
510
  /*        }                                                              */
 
511
  /*                                                                       */
 
512
  /*        ...                                                            */
 
513
  /*                                                                       */
 
514
  /*        for ( idx = 0; i < MAX_GLYPHS; i++ )                           */
 
515
  /*          FT_Done_Glyph( glyphs[idx] );                                */
 
516
  /*      }                                                                */
 
517
  /*                                                                       */
 
518
  FT_EXPORT( FT_Error )
 
519
  FT_Glyph_To_Bitmap( FT_Glyph*       the_glyph,
 
520
                      FT_Render_Mode  render_mode,
 
521
                      FT_Vector*      origin,
 
522
                      FT_Bool         destroy );
 
523
 
 
524
 
 
525
  /*************************************************************************/
 
526
  /*                                                                       */
 
527
  /* <Function>                                                            */
 
528
  /*    FT_Done_Glyph                                                      */
 
529
  /*                                                                       */
 
530
  /* <Description>                                                         */
 
531
  /*    Destroy a given glyph.                                             */
 
532
  /*                                                                       */
 
533
  /* <Input>                                                               */
 
534
  /*    glyph :: A handle to the target glyph object.                      */
 
535
  /*                                                                       */
 
536
  FT_EXPORT( void )
 
537
  FT_Done_Glyph( FT_Glyph  glyph );
 
538
 
 
539
  /* */
 
540
 
 
541
 
 
542
  /* other helpful functions */
 
543
 
 
544
  /*************************************************************************/
 
545
  /*                                                                       */
 
546
  /* <Section>                                                             */
 
547
  /*    computations                                                       */
 
548
  /*                                                                       */
 
549
  /*************************************************************************/
 
550
 
 
551
 
 
552
  /*************************************************************************/
 
553
  /*                                                                       */
 
554
  /* <Function>                                                            */
 
555
  /*    FT_Matrix_Multiply                                                 */
 
556
  /*                                                                       */
 
557
  /* <Description>                                                         */
 
558
  /*    Perform the matrix operation `b = a*b'.                            */
 
559
  /*                                                                       */
 
560
  /* <Input>                                                               */
 
561
  /*    a :: A pointer to matrix `a'.                                      */
 
562
  /*                                                                       */
 
563
  /* <InOut>                                                               */
 
564
  /*    b :: A pointer to matrix `b'.                                      */
 
565
  /*                                                                       */
 
566
  /* <Note>                                                                */
 
567
  /*    The result is undefined if either `a' or `b' is zero.              */
 
568
  /*                                                                       */
 
569
  FT_EXPORT( void )
 
570
  FT_Matrix_Multiply( const FT_Matrix*  a,
 
571
                      FT_Matrix*        b );
 
572
 
 
573
 
 
574
  /*************************************************************************/
 
575
  /*                                                                       */
 
576
  /* <Function>                                                            */
 
577
  /*    FT_Matrix_Invert                                                   */
 
578
  /*                                                                       */
 
579
  /* <Description>                                                         */
 
580
  /*    Invert a 2x2 matrix.  Return an error if it can't be inverted.     */
 
581
  /*                                                                       */
 
582
  /* <InOut>                                                               */
 
583
  /*    matrix :: A pointer to the target matrix.  Remains untouched in    */
 
584
  /*              case of error.                                           */
 
585
  /*                                                                       */
 
586
  /* <Return>                                                              */
 
587
  /*    FreeType error code.  0~means success.                             */
 
588
  /*                                                                       */
 
589
  FT_EXPORT( FT_Error )
 
590
  FT_Matrix_Invert( FT_Matrix*  matrix );
 
591
 
 
592
  /* */
 
593
 
 
594
 
 
595
FT_END_HEADER
 
596
 
 
597
#endif /* __FTGLYPH_H__ */
 
598
 
 
599
 
 
600
/* END */
 
601
 
 
602
 
 
603
/* Local Variables: */
 
604
/* coding: utf-8    */
 
605
/* End:             */