third_party/harfbuzz-ng/src/hb-uniscribe.cc

   1 /*
   2  * Copyright © 2011,2012  Google, Inc.
   3  *
   4  *  This is part of HarfBuzz, a text shaping library.
   5  *
   6  * Permission is hereby granted, without written agreement and without
   7  * license or royalty fees, to use, copy, modify, and distribute this
   8  * software and its documentation for any purpose, provided that the
   9  * above copyright notice and the following two paragraphs appear in
  10  * all copies of this software.
  11  *
  12  * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
  13  * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
  14  * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
  15  * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
  16  * DAMAGE.
  17  *
  18  * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
  19  * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
  20  * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
  21  * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
  22  * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
  23  *
  24  * Google Author(s): Behdad Esfahbod
  25  */
  26
  27 #define _WIN32_WINNT 0x0600
  28 #define WIN32_LEAN_AND_MEAN
  29
  30 #define HB_SHAPER uniscribe
  31 #include "hb-shaper-impl-private.hh"
  32
  33 #include <windows.h>
  34 #include <usp10.h>
  35
  36 #include "hb-uniscribe.h"
  37
  38 #include "hb-ot-name-table.hh"
  39 #include "hb-ot-tag.h"
  40
  41
  42 #ifndef HB_DEBUG_UNISCRIBE
  43 #define HB_DEBUG_UNISCRIBE (HB_DEBUG+0)
  44 #endif
  45
  46
  47 /*
  48 DWORD GetFontData(
  49   __in   HDC hdc,
  50   __in   DWORD dwTable,
  51   __in   DWORD dwOffset,
  52   __out  LPVOID lpvBuffer,
  53   __in   DWORD cbData
  54 );
  55 */
  56
  57
  58 HB_SHAPER_DATA_ENSURE_DECLARE(uniscribe, face)
  59 HB_SHAPER_DATA_ENSURE_DECLARE(uniscribe, font)
  60
  61
  62 /*
  63  * shaper face data
  64  */
  65
  66 struct hb_uniscribe_shaper_face_data_t {
  67   HANDLE fh;
  68 };
  69
  70 hb_uniscribe_shaper_face_data_t *
  71 _hb_uniscribe_shaper_face_data_create (hb_face_t *face)
  72 {
  73   hb_uniscribe_shaper_face_data_t *data = (hb_uniscribe_shaper_face_data_t *) calloc (1, sizeof (hb_uniscribe_shaper_face_data_t));
  74   if (unlikely (!data))
  75     return NULL;
  76
  77   hb_blob_t *blob = hb_face_reference_blob (face);
  78   unsigned int blob_length;
  79   const char *blob_data = hb_blob_get_data (blob, &blob_length);
  80   if (unlikely (!blob_length))
  81     DEBUG_MSG (UNISCRIBE, face, "Face has empty blob");
  82
  83   DWORD num_fonts_installed;
  84   data->fh = AddFontMemResourceEx ((void *) blob_data, blob_length, 0, &num_fonts_installed);
  85   hb_blob_destroy (blob);
  86   if (unlikely (!data->fh)) {
  87     DEBUG_MSG (UNISCRIBE, face, "Face AddFontMemResourceEx() failed");
  88     free (data);
  89     return NULL;
  90   }
  91
  92   return data;
  93 }
  94
  95 void
  96 _hb_uniscribe_shaper_face_data_destroy (hb_uniscribe_shaper_face_data_t *data)
  97 {
  98   RemoveFontMemResourceEx (data->fh);
  99   free (data);
 100 }
 101
 102
 103 /*
 104  * shaper font data
 105  */
 106
 107 struct hb_uniscribe_shaper_font_data_t {
 108   HDC hdc;
 109   LOGFONTW log_font;
 110   HFONT hfont;
 111   SCRIPT_CACHE script_cache;
 112 };
 113
 114 static bool
 115 populate_log_font (LOGFONTW  *lf,
 116                    hb_font_t *font)
 117 {
 118   memset (lf, 0, sizeof (*lf));
 119   lf->lfHeight = -font->y_scale;
 120   lf->lfCharSet = DEFAULT_CHARSET;
 121
 122   hb_blob_t *blob = OT::Sanitizer<OT::name>::sanitize (hb_face_reference_table (font->face, HB_TAG ('n','a','m','e')));
 123   const OT::name *name_table = OT::Sanitizer<OT::name>::lock_instance (blob);
 124   unsigned int len = name_table->get_name (3, 1, 0x409, 4,
 125                                            lf->lfFaceName,
 126                                            sizeof (lf->lfFaceName[0]) * LF_FACESIZE)
 127                                           / sizeof (lf->lfFaceName[0]);
 128   hb_blob_destroy (blob);
 129
 130   if (unlikely (!len)) {
 131     DEBUG_MSG (UNISCRIBE, NULL, "Didn't find English name table entry");
 132     return false;
 133   }
 134   if (unlikely (len >= LF_FACESIZE)) {
 135     DEBUG_MSG (UNISCRIBE, NULL, "Font name too long");
 136     return false;
 137   }
 138
 139   for (unsigned int i = 0; i < len; i++)
 140     lf->lfFaceName[i] = hb_be_uint16 (lf->lfFaceName[i]);
 141   lf->lfFaceName[len] = 0;
 142
 143   return true;
 144 }
 145
 146 hb_uniscribe_shaper_font_data_t *
 147 _hb_uniscribe_shaper_font_data_create (hb_font_t *font)
 148 {
 149   if (unlikely (!hb_uniscribe_shaper_face_data_ensure (font->face))) return NULL;
 150
 151   hb_uniscribe_shaper_font_data_t *data = (hb_uniscribe_shaper_font_data_t *) calloc (1, sizeof (hb_uniscribe_shaper_font_data_t));
 152   if (unlikely (!data))
 153     return NULL;
 154
 155   data->hdc = GetDC (NULL);
 156
 157   if (unlikely (!populate_log_font (&data->log_font, font))) {
 158     DEBUG_MSG (UNISCRIBE, font, "Font populate_log_font() failed");
 159     _hb_uniscribe_shaper_font_data_destroy (data);
 160     return NULL;
 161   }
 162
 163   data->hfont = CreateFontIndirectW (&data->log_font);
 164   if (unlikely (!data->hfont)) {
 165     DEBUG_MSG (UNISCRIBE, font, "Font CreateFontIndirectW() failed");
 166     _hb_uniscribe_shaper_font_data_destroy (data);
 167      return NULL;
 168   }
 169
 170   if (!SelectObject (data->hdc, data->hfont)) {
 171     DEBUG_MSG (UNISCRIBE, font, "Font SelectObject() failed");
 172     _hb_uniscribe_shaper_font_data_destroy (data);
 173      return NULL;
 174   }
 175
 176   return data;
 177 }
 178
 179 void
 180 _hb_uniscribe_shaper_font_data_destroy (hb_uniscribe_shaper_font_data_t *data)
 181 {
 182   if (data->hdc)
 183     ReleaseDC (NULL, data->hdc);
 184   if (data->hfont)
 185     DeleteObject (data->hfont);
 186   if (data->script_cache)
 187     ScriptFreeCache (&data->script_cache);
 188   free (data);
 189 }
 190
 191 LOGFONTW *
 192 hb_uniscribe_font_get_logfontw (hb_font_t *font)
 193 {
 194   if (unlikely (!hb_uniscribe_shaper_font_data_ensure (font))) return NULL;
 195   hb_uniscribe_shaper_font_data_t *font_data =  HB_SHAPER_DATA_GET (font);
 196   return &font_data->log_font;
 197 }
 198
 199 HFONT
 200 hb_uniscribe_font_get_hfont (hb_font_t *font)
 201 {
 202   if (unlikely (!hb_uniscribe_shaper_font_data_ensure (font))) return NULL;
 203   hb_uniscribe_shaper_font_data_t *font_data =  HB_SHAPER_DATA_GET (font);
 204   return font_data->hfont;
 205 }
 206
 207
 208 /*
 209  * shaper shape_plan data
 210  */
 211
 212 struct hb_uniscribe_shaper_shape_plan_data_t {};
 213
 214 hb_uniscribe_shaper_shape_plan_data_t *
 215 _hb_uniscribe_shaper_shape_plan_data_create (hb_shape_plan_t    *shape_plan HB_UNUSED,
 216                                              const hb_feature_t *user_features HB_UNUSED,
 217                                              unsigned int        num_user_features HB_UNUSED)
 218 {
 219   return (hb_uniscribe_shaper_shape_plan_data_t *) HB_SHAPER_DATA_SUCCEEDED;
 220 }
 221
 222 void
 223 _hb_uniscribe_shaper_shape_plan_data_destroy (hb_uniscribe_shaper_shape_plan_data_t *data HB_UNUSED)
 224 {
 225 }
 226
 227
 228 /*
 229  * shaper
 230  */
 231
 232
 233 hb_bool_t
 234 _hb_uniscribe_shape (hb_shape_plan_t    *shape_plan,
 235                      hb_font_t          *font,
 236                      hb_buffer_t        *buffer,
 237                      const hb_feature_t *features,
 238                      unsigned int        num_features)
 239 {
 240   hb_face_t *face = font->face;
 241   hb_uniscribe_shaper_face_data_t *face_data = HB_SHAPER_DATA_GET (face);
 242   hb_uniscribe_shaper_font_data_t *font_data = HB_SHAPER_DATA_GET (font);
 243
 244 #define FAIL(...) \
 245   HB_STMT_START { \
 246     DEBUG_MSG (UNISCRIBE, NULL, __VA_ARGS__); \
 247     return false; \
 248   } HB_STMT_END;
 249
 250   HRESULT hr;
 251
 252 retry:
 253
 254   unsigned int scratch_size;
 255   char *scratch = (char *) buffer->get_scratch_buffer (&scratch_size);
 256
 257   /* Allocate char buffers; they all fit */
 258
 259 #define ALLOCATE_ARRAY(Type, name, len) \
 260   Type *name = (Type *) scratch; \
 261   scratch += (len) * sizeof ((name)[0]); \
 262   scratch_size -= (len) * sizeof ((name)[0]);
 263
 264 #define utf16_index() var1.u32
 265
 266   WCHAR *pchars = (WCHAR *) scratch;
 267   unsigned int chars_len = 0;
 268   for (unsigned int i = 0; i < buffer->len; i++) {
 269     hb_codepoint_t c = buffer->info[i].codepoint;
 270     buffer->info[i].utf16_index() = chars_len;
 271     if (likely (c < 0x10000))
 272       pchars[chars_len++] = c;
 273     else if (unlikely (c >= 0x110000))
 274       pchars[chars_len++] = 0xFFFD;
 275     else {
 276       pchars[chars_len++] = 0xD800 + ((c - 0x10000) >> 10);
 277       pchars[chars_len++] = 0xDC00 + ((c - 0x10000) & ((1 << 10) - 1));
 278     }
 279   }
 280
 281   ALLOCATE_ARRAY (WCHAR, wchars, chars_len);
 282   ALLOCATE_ARRAY (WORD, log_clusters, chars_len);
 283   ALLOCATE_ARRAY (SCRIPT_CHARPROP, char_props, chars_len);
 284
 285   /* On Windows, we don't care about alignment...*/
 286   unsigned int glyphs_size = scratch_size / (sizeof (WORD) +
 287                                              sizeof (SCRIPT_GLYPHPROP) +
 288                                              sizeof (int) +
 289                                              sizeof (GOFFSET) +
 290                                              sizeof (uint32_t));
 291
 292   ALLOCATE_ARRAY (WORD, glyphs, glyphs_size);
 293   ALLOCATE_ARRAY (SCRIPT_GLYPHPROP, glyph_props, glyphs_size);
 294   ALLOCATE_ARRAY (int, advances, glyphs_size);
 295   ALLOCATE_ARRAY (GOFFSET, offsets, glyphs_size);
 296   ALLOCATE_ARRAY (uint32_t, vis_clusters, glyphs_size);
 297
 298 #undef ALLOCATE_ARRAY
 299
 300 #define MAX_ITEMS 256
 301
 302   SCRIPT_ITEM items[MAX_ITEMS + 1];
 303   SCRIPT_CONTROL bidi_control = {0};
 304   SCRIPT_STATE bidi_state = {0};
 305   ULONG script_tags[MAX_ITEMS];
 306   int item_count;
 307
 308   /* MinGW32 doesn't define fMergeNeutralItems, so we bruteforce */
 309   //bidi_control.fMergeNeutralItems = true;
 310   *(uint32_t*)&bidi_control |= 1<<24;
 311
 312   bidi_state.uBidiLevel = HB_DIRECTION_IS_FORWARD (buffer->props.direction) ? 0 : 1;
 313   bidi_state.fOverrideDirection = 1;
 314
 315   hr = ScriptItemizeOpenType (wchars,
 316                               chars_len,
 317                               MAX_ITEMS,
 318                               &bidi_control,
 319                               &bidi_state,
 320                               items,
 321                               script_tags,
 322                               &item_count);
 323   if (unlikely (FAILED (hr)))
 324     FAIL ("ScriptItemizeOpenType() failed: 0x%08xL", hr);
 325
 326 #undef MAX_ITEMS
 327
 328   int *range_char_counts = NULL;
 329   TEXTRANGE_PROPERTIES **range_properties = NULL;
 330   int range_count = 0;
 331   if (num_features) {
 332     /* TODO setup ranges */
 333   }
 334
 335   OPENTYPE_TAG language_tag = hb_uint32_swap (hb_ot_tag_from_language (buffer->props.language));
 336
 337   unsigned int glyphs_offset = 0;
 338   unsigned int glyphs_len;
 339   bool backward = HB_DIRECTION_IS_BACKWARD (buffer->props.direction);
 340   for (unsigned int j = 0; j < item_count; j++)
 341   {
 342     unsigned int i = backward ? item_count - 1 - j : j;
 343     unsigned int chars_offset = items[i].iCharPos;
 344     unsigned int item_chars_len = items[i + 1].iCharPos - chars_offset;
 345
 346   retry_shape:
 347     hr = ScriptShapeOpenType (font_data->hdc,
 348                               &font_data->script_cache,
 349                               &items[i].a,
 350                               script_tags[i],
 351                               language_tag,
 352                               range_char_counts,
 353                               range_properties,
 354                               range_count,
 355                               wchars + chars_offset,
 356                               item_chars_len,
 357                               glyphs_size - glyphs_offset,
 358                               /* out */
 359                               log_clusters + chars_offset,
 360                               char_props + chars_offset,
 361                               glyphs + glyphs_offset,
 362                               glyph_props + glyphs_offset,
 363                               (int *) &glyphs_len);
 364
 365     if (unlikely (items[i].a.fNoGlyphIndex))
 366       FAIL ("ScriptShapeOpenType() set fNoGlyphIndex");
 367     if (unlikely (hr == E_OUTOFMEMORY))
 368     {
 369       buffer->ensure (buffer->allocated * 2);
 370       if (buffer->in_error)
 371         FAIL ("Buffer resize failed");
 372       goto retry;
 373     }
 374     if (unlikely (hr == USP_E_SCRIPT_NOT_IN_FONT))
 375     {
 376       if (items[i].a.eScript == SCRIPT_UNDEFINED)
 377         FAIL ("ScriptShapeOpenType() failed: Font doesn't support script");
 378       items[i].a.eScript = SCRIPT_UNDEFINED;
 379       goto retry_shape;
 380     }
 381     if (unlikely (FAILED (hr)))
 382     {
 383       FAIL ("ScriptShapeOpenType() failed: 0x%08xL", hr);
 384     }
 385
 386     for (unsigned int j = chars_offset; j < chars_offset + item_chars_len; j++)
 387       log_clusters[j] += glyphs_offset;
 388
 389     hr = ScriptPlaceOpenType (font_data->hdc,
 390                               &font_data->script_cache,
 391                               &items[i].a,
 392                               script_tags[i],
 393                               language_tag,
 394                               range_char_counts,
 395                               range_properties,
 396                               range_count,
 397                               wchars + chars_offset,
 398                               log_clusters + chars_offset,
 399                               char_props + chars_offset,
 400                               item_chars_len,
 401                               glyphs + glyphs_offset,
 402                               glyph_props + glyphs_offset,
 403                               glyphs_len,
 404                               /* out */
 405                               advances + glyphs_offset,
 406                               offsets + glyphs_offset,
 407                               NULL);
 408     if (unlikely (FAILED (hr)))
 409       FAIL ("ScriptPlaceOpenType() failed: 0x%08xL", hr);
 410
 411     glyphs_offset += glyphs_len;
 412   }
 413   glyphs_len = glyphs_offset;
 414
 415   /* Ok, we've got everything we need, now compose output buffer,
 416    * very, *very*, carefully! */
 417
 418   /* Calculate visual-clusters.  That's what we ship. */
 419   for (unsigned int i = 0; i < glyphs_len; i++)
 420     vis_clusters[i] = -1;
 421   for (unsigned int i = 0; i < buffer->len; i++) {
 422     uint32_t *p = &vis_clusters[log_clusters[buffer->info[i].utf16_index()]];
 423     *p = MIN (*p, buffer->info[i].cluster);
 424   }
 425   if (!backward) {
 426     for (unsigned int i = 1; i < glyphs_len; i++)
 427       if (vis_clusters[i] == -1)
 428         vis_clusters[i] = vis_clusters[i - 1];
 429   } else {
 430     for (int i = glyphs_len - 2; i >= 0; i--)
 431       if (vis_clusters[i] == -1)
 432         vis_clusters[i] = vis_clusters[i + 1];
 433   }
 434
 435 #undef utf16_index
 436
 437   buffer->ensure (glyphs_len);
 438   if (buffer->in_error)
 439     FAIL ("Buffer in error");
 440
 441 #undef FAIL
 442
 443   /* Set glyph infos */
 444   buffer->len = 0;
 445   for (unsigned int i = 0; i < glyphs_len; i++)
 446   {
 447     hb_glyph_info_t *info = &buffer->info[buffer->len++];
 448
 449     info->codepoint = glyphs[i];
 450     info->cluster = vis_clusters[i];
 451
 452     /* The rest is crap.  Let's store position info there for now. */
 453     info->mask = advances[i];
 454     info->var1.u32 = offsets[i].du;
 455     info->var2.u32 = offsets[i].dv;
 456   }
 457
 458   /* Set glyph positions */
 459   buffer->clear_positions ();
 460   for (unsigned int i = 0; i < glyphs_len; i++)
 461   {
 462     hb_glyph_info_t *info = &buffer->info[i];
 463     hb_glyph_position_t *pos = &buffer->pos[i];
 464
 465     /* TODO vertical */
 466     pos->x_advance = info->mask;
 467     pos->x_offset = info->var1.u32;
 468     pos->y_offset = info->var2.u32;
 469   }
 470
 471   /* Wow, done! */
 472   return true;
 473 }
 474
 475