summaryrefslogtreecommitdiff
path: root/Build/source/libs/harfbuzz/harfbuzz-0.9.12/src/hb-uniscribe.cc
blob: 2f01c28778f89da66fc2c76c9fa6a80c9203ebe9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
/*
 * Copyright © 2011,2012  Google, Inc.
 *
 *  This is part of HarfBuzz, a text shaping library.
 *
 * Permission is hereby granted, without written agreement and without
 * license or royalty fees, to use, copy, modify, and distribute this
 * software and its documentation for any purpose, provided that the
 * above copyright notice and the following two paragraphs appear in
 * all copies of this software.
 *
 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 *
 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
 *
 * Google Author(s): Behdad Esfahbod
 */

#define _WIN32_WINNT 0x0600
#define WIN32_LEAN_AND_MEAN

#define HB_SHAPER uniscribe
#include "hb-shaper-impl-private.hh"

#include <windows.h>
#include <usp10.h>

#include "hb-uniscribe.h"

#include "hb-ot-name-table.hh"
#include "hb-ot-tag.h"


#ifndef HB_DEBUG_UNISCRIBE
#define HB_DEBUG_UNISCRIBE (HB_DEBUG+0)
#endif


/*
DWORD GetFontData(
  __in   HDC hdc,
  __in   DWORD dwTable,
  __in   DWORD dwOffset,
  __out  LPVOID lpvBuffer,
  __in   DWORD cbData
);
*/


HB_SHAPER_DATA_ENSURE_DECLARE(uniscribe, face)
HB_SHAPER_DATA_ENSURE_DECLARE(uniscribe, font)


/*
 * shaper face data
 */

struct hb_uniscribe_shaper_face_data_t {
  HANDLE fh;
};

hb_uniscribe_shaper_face_data_t *
_hb_uniscribe_shaper_face_data_create (hb_face_t *face)
{
  hb_uniscribe_shaper_face_data_t *data = (hb_uniscribe_shaper_face_data_t *) calloc (1, sizeof (hb_uniscribe_shaper_face_data_t));
  if (unlikely (!data))
    return NULL;

  hb_blob_t *blob = hb_face_reference_blob (face);
  unsigned int blob_length;
  const char *blob_data = hb_blob_get_data (blob, &blob_length);
  if (unlikely (!blob_length))
    DEBUG_MSG (UNISCRIBE, face, "Face has empty blob");

  DWORD num_fonts_installed;
  data->fh = AddFontMemResourceEx ((void *) blob_data, blob_length, 0, &num_fonts_installed);
  hb_blob_destroy (blob);
  if (unlikely (!data->fh)) {
    DEBUG_MSG (UNISCRIBE, face, "Face AddFontMemResourceEx() failed");
    free (data);
    return NULL;
  }

  return data;
}

void
_hb_uniscribe_shaper_face_data_destroy (hb_uniscribe_shaper_face_data_t *data)
{
  RemoveFontMemResourceEx (data->fh);
  free (data);
}


/*
 * shaper font data
 */

struct hb_uniscribe_shaper_font_data_t {
  HDC hdc;
  LOGFONTW log_font;
  HFONT hfont;
  SCRIPT_CACHE script_cache;
};

static bool
populate_log_font (LOGFONTW  *lf,
		   hb_font_t *font)
{
  memset (lf, 0, sizeof (*lf));
  lf->lfHeight = -font->y_scale;
  lf->lfCharSet = DEFAULT_CHARSET;

  hb_blob_t *blob = OT::Sanitizer<OT::name>::sanitize (hb_face_reference_table (font->face, HB_TAG ('n','a','m','e')));
  const OT::name *name_table = OT::Sanitizer<OT::name>::lock_instance (blob);
  unsigned int len = name_table->get_name (3, 1, 0x409, 4,
					   lf->lfFaceName,
					   sizeof (lf->lfFaceName[0]) * LF_FACESIZE)
					  / sizeof (lf->lfFaceName[0]);
  hb_blob_destroy (blob);

  if (unlikely (!len)) {
    DEBUG_MSG (UNISCRIBE, NULL, "Didn't find English name table entry");
    return false;
  }
  if (unlikely (len >= LF_FACESIZE)) {
    DEBUG_MSG (UNISCRIBE, NULL, "Font name too long");
    return false;
  }

  for (unsigned int i = 0; i < len; i++)
    lf->lfFaceName[i] = hb_be_uint16 (lf->lfFaceName[i]);
  lf->lfFaceName[len] = 0;

  return true;
}

hb_uniscribe_shaper_font_data_t *
_hb_uniscribe_shaper_font_data_create (hb_font_t *font)
{
  if (unlikely (!hb_uniscribe_shaper_face_data_ensure (font->face))) return NULL;

  hb_uniscribe_shaper_font_data_t *data = (hb_uniscribe_shaper_font_data_t *) calloc (1, sizeof (hb_uniscribe_shaper_font_data_t));
  if (unlikely (!data))
    return NULL;

  data->hdc = GetDC (NULL);

  if (unlikely (!populate_log_font (&data->log_font, font))) {
    DEBUG_MSG (UNISCRIBE, font, "Font populate_log_font() failed");
    _hb_uniscribe_shaper_font_data_destroy (data);
    return NULL;
  }

  data->hfont = CreateFontIndirectW (&data->log_font);
  if (unlikely (!data->hfont)) {
    DEBUG_MSG (UNISCRIBE, font, "Font CreateFontIndirectW() failed");
    _hb_uniscribe_shaper_font_data_destroy (data);
     return NULL;
  }

  if (!SelectObject (data->hdc, data->hfont)) {
    DEBUG_MSG (UNISCRIBE, font, "Font SelectObject() failed");
    _hb_uniscribe_shaper_font_data_destroy (data);
     return NULL;
  }

  return data;
}

void
_hb_uniscribe_shaper_font_data_destroy (hb_uniscribe_shaper_font_data_t *data)
{
  if (data->hdc)
    ReleaseDC (NULL, data->hdc);
  if (data->hfont)
    DeleteObject (data->hfont);
  if (data->script_cache)
    ScriptFreeCache (&data->script_cache);
  free (data);
}

LOGFONTW *
hb_uniscribe_font_get_logfontw (hb_font_t *font)
{
  if (unlikely (!hb_uniscribe_shaper_font_data_ensure (font))) return NULL;
  hb_uniscribe_shaper_font_data_t *font_data =  HB_SHAPER_DATA_GET (font);
  return &font_data->log_font;
}

HFONT
hb_uniscribe_font_get_hfont (hb_font_t *font)
{
  if (unlikely (!hb_uniscribe_shaper_font_data_ensure (font))) return NULL;
  hb_uniscribe_shaper_font_data_t *font_data =  HB_SHAPER_DATA_GET (font);
  return font_data->hfont;
}


/*
 * shaper shape_plan data
 */

struct hb_uniscribe_shaper_shape_plan_data_t {};

hb_uniscribe_shaper_shape_plan_data_t *
_hb_uniscribe_shaper_shape_plan_data_create (hb_shape_plan_t    *shape_plan HB_UNUSED,
					     const hb_feature_t *user_features HB_UNUSED,
					     unsigned int        num_user_features HB_UNUSED)
{
  return (hb_uniscribe_shaper_shape_plan_data_t *) HB_SHAPER_DATA_SUCCEEDED;
}

void
_hb_uniscribe_shaper_shape_plan_data_destroy (hb_uniscribe_shaper_shape_plan_data_t *data HB_UNUSED)
{
}


/*
 * shaper
 */


hb_bool_t
_hb_uniscribe_shape (hb_shape_plan_t    *shape_plan,
		     hb_font_t          *font,
		     hb_buffer_t        *buffer,
		     const hb_feature_t *features,
		     unsigned int        num_features)
{
  hb_face_t *face = font->face;
  hb_uniscribe_shaper_face_data_t *face_data = HB_SHAPER_DATA_GET (face);
  hb_uniscribe_shaper_font_data_t *font_data = HB_SHAPER_DATA_GET (font);

#define FAIL(...) \
  HB_STMT_START { \
    DEBUG_MSG (UNISCRIBE, NULL, __VA_ARGS__); \
    return false; \
  } HB_STMT_END;

  HRESULT hr;

retry:

  unsigned int scratch_size;
  char *scratch = (char *) buffer->get_scratch_buffer (&scratch_size);

  /* Allocate char buffers; they all fit */

#define ALLOCATE_ARRAY(Type, name, len) \
  Type *name = (Type *) scratch; \
  scratch += (len) * sizeof ((name)[0]); \
  scratch_size -= (len) * sizeof ((name)[0]);

#define utf16_index() var1.u32

  WCHAR *pchars = (WCHAR *) scratch;
  unsigned int chars_len = 0;
  for (unsigned int i = 0; i < buffer->len; i++) {
    hb_codepoint_t c = buffer->info[i].codepoint;
    buffer->info[i].utf16_index() = chars_len;
    if (likely (c < 0x10000))
      pchars[chars_len++] = c;
    else if (unlikely (c >= 0x110000))
      pchars[chars_len++] = 0xFFFD;
    else {
      pchars[chars_len++] = 0xD800 + ((c - 0x10000) >> 10);
      pchars[chars_len++] = 0xDC00 + ((c - 0x10000) & ((1 << 10) - 1));
    }
  }

  ALLOCATE_ARRAY (WCHAR, wchars, chars_len);
  ALLOCATE_ARRAY (WORD, log_clusters, chars_len);
  ALLOCATE_ARRAY (SCRIPT_CHARPROP, char_props, chars_len);

  /* On Windows, we don't care about alignment...*/
  unsigned int glyphs_size = scratch_size / (sizeof (WORD) +
					     sizeof (SCRIPT_GLYPHPROP) +
					     sizeof (int) +
					     sizeof (GOFFSET) +
					     sizeof (uint32_t));

  ALLOCATE_ARRAY (WORD, glyphs, glyphs_size);
  ALLOCATE_ARRAY (SCRIPT_GLYPHPROP, glyph_props, glyphs_size);
  ALLOCATE_ARRAY (int, advances, glyphs_size);
  ALLOCATE_ARRAY (GOFFSET, offsets, glyphs_size);
  ALLOCATE_ARRAY (uint32_t, vis_clusters, glyphs_size);

#undef ALLOCATE_ARRAY

#define MAX_ITEMS 256

  SCRIPT_ITEM items[MAX_ITEMS + 1];
  SCRIPT_CONTROL bidi_control = {0};
  SCRIPT_STATE bidi_state = {0};
  ULONG script_tags[MAX_ITEMS];
  int item_count;

  /* MinGW32 doesn't define fMergeNeutralItems, so we bruteforce */
  //bidi_control.fMergeNeutralItems = true;
  *(uint32_t*)&bidi_control |= 1<<24;

  bidi_state.uBidiLevel = HB_DIRECTION_IS_FORWARD (buffer->props.direction) ? 0 : 1;
  bidi_state.fOverrideDirection = 1;

  hr = ScriptItemizeOpenType (wchars,
			      chars_len,
			      MAX_ITEMS,
			      &bidi_control,
			      &bidi_state,
			      items,
			      script_tags,
			      &item_count);
  if (unlikely (FAILED (hr)))
    FAIL ("ScriptItemizeOpenType() failed: 0x%08xL", hr);

#undef MAX_ITEMS

  int *range_char_counts = NULL;
  TEXTRANGE_PROPERTIES **range_properties = NULL;
  int range_count = 0;
  if (num_features) {
    /* TODO setup ranges */
  }

  OPENTYPE_TAG language_tag = hb_uint32_swap (hb_ot_tag_from_language (buffer->props.language));

  unsigned int glyphs_offset = 0;
  unsigned int glyphs_len;
  bool backward = HB_DIRECTION_IS_BACKWARD (buffer->props.direction);
  for (unsigned int j = 0; j < item_count; j++)
  {
    unsigned int i = backward ? item_count - 1 - j : j;
    unsigned int chars_offset = items[i].iCharPos;
    unsigned int item_chars_len = items[i + 1].iCharPos - chars_offset;

  retry_shape:
    hr = ScriptShapeOpenType (font_data->hdc,
			      &font_data->script_cache,
			      &items[i].a,
			      script_tags[i],
			      language_tag,
			      range_char_counts,
			      range_properties,
			      range_count,
			      wchars + chars_offset,
			      item_chars_len,
			      glyphs_size - glyphs_offset,
			      /* out */
			      log_clusters + chars_offset,
			      char_props + chars_offset,
			      glyphs + glyphs_offset,
			      glyph_props + glyphs_offset,
			      (int *) &glyphs_len);

    if (unlikely (items[i].a.fNoGlyphIndex))
      FAIL ("ScriptShapeOpenType() set fNoGlyphIndex");
    if (unlikely (hr == E_OUTOFMEMORY))
    {
      buffer->ensure (buffer->allocated * 2);
      if (buffer->in_error)
	FAIL ("Buffer resize failed");
      goto retry;
    }
    if (unlikely (hr == USP_E_SCRIPT_NOT_IN_FONT))
    {
      if (items[i].a.eScript == SCRIPT_UNDEFINED)
	FAIL ("ScriptShapeOpenType() failed: Font doesn't support script");
      items[i].a.eScript = SCRIPT_UNDEFINED;
      goto retry_shape;
    }
    if (unlikely (FAILED (hr)))
    {
      FAIL ("ScriptShapeOpenType() failed: 0x%08xL", hr);
    }

    for (unsigned int j = chars_offset; j < chars_offset + item_chars_len; j++)
      log_clusters[j] += glyphs_offset;

    hr = ScriptPlaceOpenType (font_data->hdc,
			      &font_data->script_cache,
			      &items[i].a,
			      script_tags[i],
			      language_tag,
			      range_char_counts,
			      range_properties,
			      range_count,
			      wchars + chars_offset,
			      log_clusters + chars_offset,
			      char_props + chars_offset,
			      item_chars_len,
			      glyphs + glyphs_offset,
			      glyph_props + glyphs_offset,
			      glyphs_len,
			      /* out */
			      advances + glyphs_offset,
			      offsets + glyphs_offset,
			      NULL);
    if (unlikely (FAILED (hr)))
      FAIL ("ScriptPlaceOpenType() failed: 0x%08xL", hr);

    glyphs_offset += glyphs_len;
  }
  glyphs_len = glyphs_offset;

  /* Ok, we've got everything we need, now compose output buffer,
   * very, *very*, carefully! */

  /* Calculate visual-clusters.  That's what we ship. */
  for (unsigned int i = 0; i < glyphs_len; i++)
    vis_clusters[i] = -1;
  for (unsigned int i = 0; i < buffer->len; i++) {
    uint32_t *p = &vis_clusters[log_clusters[buffer->info[i].utf16_index()]];
    *p = MIN (*p, buffer->info[i].cluster);
  }
  if (!backward) {
    for (unsigned int i = 1; i < glyphs_len; i++)
      if (vis_clusters[i] == -1)
	vis_clusters[i] = vis_clusters[i - 1];
  } else {
    for (int i = glyphs_len - 2; i >= 0; i--)
      if (vis_clusters[i] == -1)
	vis_clusters[i] = vis_clusters[i + 1];
  }

#undef utf16_index

  buffer->ensure (glyphs_len);
  if (buffer->in_error)
    FAIL ("Buffer in error");

#undef FAIL

  /* Set glyph infos */
  buffer->len = 0;
  for (unsigned int i = 0; i < glyphs_len; i++)
  {
    hb_glyph_info_t *info = &buffer->info[buffer->len++];

    info->codepoint = glyphs[i];
    info->cluster = vis_clusters[i];

    /* The rest is crap.  Let's store position info there for now. */
    info->mask = advances[i];
    info->var1.u32 = offsets[i].du;
    info->var2.u32 = offsets[i].dv;
  }

  /* Set glyph positions */
  buffer->clear_positions ();
  for (unsigned int i = 0; i < glyphs_len; i++)
  {
    hb_glyph_info_t *info = &buffer->info[i];
    hb_glyph_position_t *pos = &buffer->pos[i];

    /* TODO vertical */
    pos->x_advance = info->mask;
    pos->x_offset = info->var1.u32;
    pos->y_offset = info->var2.u32;
  }

  /* Wow, done! */
  return true;
}