ReactOS  0.4.13-dev-982-g9853eab
ftgloadr.c
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1 /***************************************************************************/
2 /* */
3 /* ftgloadr.c */
4 /* */
5 /* The FreeType glyph loader (body). */
6 /* */
7 /* Copyright 2002-2018 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 #include <ft2build.h>
20 #include FT_INTERNAL_DEBUG_H
21 #include FT_INTERNAL_GLYPH_LOADER_H
22 #include FT_INTERNAL_MEMORY_H
23 #include FT_INTERNAL_OBJECTS_H
24 
25 #undef FT_COMPONENT
26 #define FT_COMPONENT trace_gloader
27 
28 
29  /*************************************************************************/
30  /*************************************************************************/
31  /*************************************************************************/
32  /***** *****/
33  /***** *****/
34  /***** G L Y P H L O A D E R *****/
35  /***** *****/
36  /***** *****/
37  /*************************************************************************/
38  /*************************************************************************/
39  /*************************************************************************/
40 
41  /*************************************************************************/
42  /* */
43  /* The glyph loader is a simple object which is used to load a set of */
44  /* glyphs easily. It is critical for the correct loading of composites. */
45  /* */
46  /* Ideally, one can see it as a stack of abstract `glyph' objects. */
47  /* */
48  /* loader.base Is really the bottom of the stack. It describes a */
49  /* single glyph image made of the juxtaposition of */
50  /* several glyphs (those `in the stack'). */
51  /* */
52  /* loader.current Describes the top of the stack, on which a new */
53  /* glyph can be loaded. */
54  /* */
55  /* Rewind Clears the stack. */
56  /* Prepare Set up `loader.current' for addition of a new glyph */
57  /* image. */
58  /* Add Add the `current' glyph image to the `base' one, */
59  /* and prepare for another one. */
60  /* */
61  /* The glyph loader is now a base object. Each driver used to */
62  /* re-implement it in one way or the other, which wasted code and */
63  /* energy. */
64  /* */
65  /*************************************************************************/
66 
67 
68  /* create a new glyph loader */
71  FT_GlyphLoader *aloader )
72  {
73  FT_GlyphLoader loader = NULL;
75 
76 
77  if ( !FT_NEW( loader ) )
78  {
79  loader->memory = memory;
80  *aloader = loader;
81  }
82  return error;
83  }
84 
85 
86  /* rewind the glyph loader - reset counters to 0 */
87  FT_BASE_DEF( void )
89  {
90  FT_GlyphLoad base = &loader->base;
91  FT_GlyphLoad current = &loader->current;
92 
93 
94  base->outline.n_points = 0;
95  base->outline.n_contours = 0;
96  base->num_subglyphs = 0;
97 
98  *current = *base;
99  }
100 
101 
102  /* reset the glyph loader, frees all allocated tables */
103  /* and starts from zero */
104  FT_BASE_DEF( void )
106  {
107  FT_Memory memory = loader->memory;
108 
109 
110  FT_FREE( loader->base.outline.points );
111  FT_FREE( loader->base.outline.tags );
112  FT_FREE( loader->base.outline.contours );
113  FT_FREE( loader->base.extra_points );
114  FT_FREE( loader->base.subglyphs );
115 
116  loader->base.extra_points2 = NULL;
117 
118  loader->max_points = 0;
119  loader->max_contours = 0;
120  loader->max_subglyphs = 0;
121 
122  FT_GlyphLoader_Rewind( loader );
123  }
124 
125 
126  /* delete a glyph loader */
127  FT_BASE_DEF( void )
129  {
130  if ( loader )
131  {
132  FT_Memory memory = loader->memory;
133 
134 
135  FT_GlyphLoader_Reset( loader );
136  FT_FREE( loader );
137  }
138  }
139 
140 
141  /* re-adjust the `current' outline fields */
142  static void
144  {
145  FT_Outline* base = &loader->base.outline;
146  FT_Outline* current = &loader->current.outline;
147 
148 
149  current->points = base->points + base->n_points;
150  current->tags = base->tags + base->n_points;
151  current->contours = base->contours + base->n_contours;
152 
153  /* handle extra points table - if any */
154  if ( loader->use_extra )
155  {
156  loader->current.extra_points = loader->base.extra_points +
157  base->n_points;
158 
159  loader->current.extra_points2 = loader->base.extra_points2 +
160  base->n_points;
161  }
162  }
163 
164 
167  {
168  FT_Error error;
169  FT_Memory memory = loader->memory;
170 
171 
172  if ( !FT_NEW_ARRAY( loader->base.extra_points, 2 * loader->max_points ) )
173  {
174  loader->use_extra = 1;
175  loader->base.extra_points2 = loader->base.extra_points +
176  loader->max_points;
177 
179  }
180  return error;
181  }
182 
183 
184  /* re-adjust the `current' subglyphs field */
185  static void
187  {
188  FT_GlyphLoad base = &loader->base;
189  FT_GlyphLoad current = &loader->current;
190 
191 
192  current->subglyphs = base->subglyphs + base->num_subglyphs;
193  }
194 
195 
196  /* Ensure that we can add `n_points' and `n_contours' to our glyph. */
197  /* This function reallocates its outline tables if necessary. Note that */
198  /* it DOESN'T change the number of points within the loader! */
199  /* */
202  FT_UInt n_points,
203  FT_UInt n_contours )
204  {
205  FT_Memory memory = loader->memory;
207  FT_Outline* base = &loader->base.outline;
208  FT_Outline* current = &loader->current.outline;
209  FT_Bool adjust = 0;
210 
211  FT_UInt new_max, old_max;
212 
213 
214  /* check points & tags */
215  new_max = (FT_UInt)base->n_points + (FT_UInt)current->n_points +
216  n_points;
217  old_max = loader->max_points;
218 
219  if ( new_max > old_max )
220  {
221  new_max = FT_PAD_CEIL( new_max, 8 );
222 
223  if ( new_max > FT_OUTLINE_POINTS_MAX )
224  return FT_THROW( Array_Too_Large );
225 
226  if ( FT_RENEW_ARRAY( base->points, old_max, new_max ) ||
227  FT_RENEW_ARRAY( base->tags, old_max, new_max ) )
228  goto Exit;
229 
230  if ( loader->use_extra )
231  {
232  if ( FT_RENEW_ARRAY( loader->base.extra_points,
233  old_max * 2, new_max * 2 ) )
234  goto Exit;
235 
236  FT_ARRAY_MOVE( loader->base.extra_points + new_max,
237  loader->base.extra_points + old_max,
238  old_max );
239 
240  loader->base.extra_points2 = loader->base.extra_points + new_max;
241  }
242 
243  adjust = 1;
244  loader->max_points = new_max;
245  }
246 
247  /* check contours */
248  old_max = loader->max_contours;
249  new_max = (FT_UInt)base->n_contours + (FT_UInt)current->n_contours +
250  n_contours;
251  if ( new_max > old_max )
252  {
253  new_max = FT_PAD_CEIL( new_max, 4 );
254 
255  if ( new_max > FT_OUTLINE_CONTOURS_MAX )
256  return FT_THROW( Array_Too_Large );
257 
258  if ( FT_RENEW_ARRAY( base->contours, old_max, new_max ) )
259  goto Exit;
260 
261  adjust = 1;
262  loader->max_contours = new_max;
263  }
264 
265  if ( adjust )
267 
268  Exit:
269  if ( error )
270  FT_GlyphLoader_Reset( loader );
271 
272  return error;
273  }
274 
275 
276  /* Ensure that we can add `n_subglyphs' to our glyph. this function */
277  /* reallocates its subglyphs table if necessary. Note that it DOES */
278  /* NOT change the number of subglyphs within the loader! */
279  /* */
282  FT_UInt n_subs )
283  {
284  FT_Memory memory = loader->memory;
286  FT_UInt new_max, old_max;
287 
288  FT_GlyphLoad base = &loader->base;
289  FT_GlyphLoad current = &loader->current;
290 
291 
292  new_max = base->num_subglyphs + current->num_subglyphs + n_subs;
293  old_max = loader->max_subglyphs;
294  if ( new_max > old_max )
295  {
296  new_max = FT_PAD_CEIL( new_max, 2 );
297  if ( FT_RENEW_ARRAY( base->subglyphs, old_max, new_max ) )
298  goto Exit;
299 
300  loader->max_subglyphs = new_max;
301 
303  }
304 
305  Exit:
306  return error;
307  }
308 
309 
310  /* prepare loader for the addition of a new glyph on top of the base one */
311  FT_BASE_DEF( void )
313  {
314  FT_GlyphLoad current = &loader->current;
315 
316 
317  current->outline.n_points = 0;
318  current->outline.n_contours = 0;
319  current->num_subglyphs = 0;
320 
321  FT_GlyphLoader_Adjust_Points ( loader );
323  }
324 
325 
326  /* add current glyph to the base image -- and prepare for another */
327  FT_BASE_DEF( void )
329  {
332 
333  FT_Int n_curr_contours;
334  FT_Int n_base_points;
335  FT_Int n;
336 
337 
338  if ( !loader )
339  return;
340 
341  base = &loader->base;
342  current = &loader->current;
343 
344  n_curr_contours = current->outline.n_contours;
345  n_base_points = base->outline.n_points;
346 
347  base->outline.n_points =
348  (short)( base->outline.n_points + current->outline.n_points );
349  base->outline.n_contours =
350  (short)( base->outline.n_contours + current->outline.n_contours );
351 
352  base->num_subglyphs += current->num_subglyphs;
353 
354  /* adjust contours count in newest outline */
355  for ( n = 0; n < n_curr_contours; n++ )
356  current->outline.contours[n] =
357  (short)( current->outline.contours[n] + n_base_points );
358 
359  /* prepare for another new glyph image */
360  FT_GlyphLoader_Prepare( loader );
361  }
362 
363 
367  {
368  FT_Error error;
369  FT_UInt num_points = (FT_UInt)source->base.outline.n_points;
370  FT_UInt num_contours = (FT_UInt)source->base.outline.n_contours;
371 
372 
373  error = FT_GlyphLoader_CheckPoints( target, num_points, num_contours );
374  if ( !error )
375  {
376  FT_Outline* out = &target->base.outline;
377  FT_Outline* in = &source->base.outline;
378 
379 
380  FT_ARRAY_COPY( out->points, in->points,
381  num_points );
382  FT_ARRAY_COPY( out->tags, in->tags,
383  num_points );
384  FT_ARRAY_COPY( out->contours, in->contours,
385  num_contours );
386 
387  /* do we need to copy the extra points? */
388  if ( target->use_extra && source->use_extra )
389  {
390  FT_ARRAY_COPY( target->base.extra_points, source->base.extra_points,
391  num_points );
392  FT_ARRAY_COPY( target->base.extra_points2, source->base.extra_points2,
393  num_points );
394  }
395 
396  out->n_points = (short)num_points;
397  out->n_contours = (short)num_contours;
398 
400  }
401 
402  return error;
403  }
404 
405 
406 /* END */
FT_GlyphLoader_CopyPoints(FT_GlyphLoader target, FT_GlyphLoader source)
Definition: ftgloadr.c:365
int FT_Error
Definition: fttypes.h:300
#define error(str)
Definition: mkdosfs.c:1605
signed int FT_Int
Definition: fttypes.h:220
#define FT_ARRAY_COPY(dest, source, count)
Definition: ftmemory.h:244
FT_Vector * extra_points
Definition: ftgloadr.h:53
GLdouble n
Definition: glext.h:7729
FT_Memory memory
Definition: ftgloadr.h:63
return FT_Err_Ok
Definition: ftbbox.c:511
static char memory[1024 *256]
Definition: process.c:116
FT_GlyphLoadRec base
Definition: ftgloadr.h:69
FT_BEGIN_HEADER typedef unsigned char FT_Bool
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unsigned short(__cdecl typeof(TIFFCurrentDirectory))(struct tiff *)
Definition: typeof.h:93
#define FT_PAD_CEIL(x, n)
Definition: ftobjs.h:90
FT_Outline outline
Definition: ftgloadr.h:52
#define FT_THROW(e)
Definition: ftdebug.h:213
GLuint base
Definition: 3dtext.c:35
FT_GlyphLoader_Rewind(FT_GlyphLoader loader)
Definition: ftgloadr.c:88
#define FT_OUTLINE_POINTS_MAX
Definition: ftimage.h:352
FT_GlyphLoader_Reset(FT_GlyphLoader loader)
Definition: ftgloadr.c:105
FT_Vector * extra_points2
Definition: ftgloadr.h:54
smooth NULL
Definition: ftsmooth.c:416
#define FT_FREE(ptr)
Definition: ftmemory.h:329
FT_GlyphLoader_Done(FT_GlyphLoader loader)
Definition: ftgloadr.c:128
#define FT_ARRAY_MOVE(dest, source, count)
Definition: ftmemory.h:249
static void Exit(void)
Definition: sock.c:1331
FT_GlyphLoader_CheckPoints(FT_GlyphLoader loader, FT_UInt n_points, FT_UInt n_contours)
Definition: ftgloadr.c:201
LONGLONG base
Definition: pdh_main.c:175
static FILE * out
Definition: regtests2xml.c:44
#define FT_RENEW_ARRAY(ptr, curcnt, newcnt)
Definition: ftmemory.h:336
FT_GlyphLoader_Add(FT_GlyphLoader loader)
Definition: ftgloadr.c:328
FT_GlyphLoadRec current
Definition: ftgloadr.h:70
typedefFT_BEGIN_HEADER struct FT_MemoryRec_ * FT_Memory
Definition: ftsystem.h:66
#define FT_NEW_ARRAY(ptr, count)
Definition: ftmemory.h:333
static void FT_GlyphLoader_Adjust_Points(FT_GlyphLoader loader)
Definition: ftgloadr.c:143
GLuint in
Definition: glext.h:9616
unsigned int FT_UInt
Definition: fttypes.h:231
#define FT_BASE_DEF(x)
Definition: ftconfig.h:419
FT_GlyphLoader_New(FT_Memory memory, FT_GlyphLoader *aloader)
Definition: ftgloadr.c:70
GLenum target
Definition: glext.h:7315
#define FT_NEW(ptr)
Definition: ftmemory.h:331
FT_GlyphLoader_CheckSubGlyphs(FT_GlyphLoader loader, FT_UInt n_subs)
Definition: ftgloadr.c:281
FT_GlyphLoader_CreateExtra(FT_GlyphLoader loader)
Definition: ftgloadr.c:166
FT_Bool use_extra
Definition: ftgloadr.h:67
static void FT_GlyphLoader_Adjust_Subglyphs(FT_GlyphLoader loader)
Definition: ftgloadr.c:186
FT_GlyphLoader_Prepare(FT_GlyphLoader loader)
Definition: ftgloadr.c:312
struct task_struct * current
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#define FT_OUTLINE_CONTOURS_MAX
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