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/* 48DWORD 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 58HB_SHAPER_DATA_ENSURE_DECLARE(uniscribe, face) 59HB_SHAPER_DATA_ENSURE_DECLARE(uniscribe, font) 60 61 62/* 63 * shaper face data 64 */ 65 66struct hb_uniscribe_shaper_face_data_t { 67 HANDLE fh; 68}; 69 70hb_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 95void 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 107struct hb_uniscribe_shaper_font_data_t { 108 HDC hdc; 109 LOGFONTW log_font; 110 HFONT hfont; 111 SCRIPT_CACHE script_cache; 112}; 113 114static bool 115populate_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 146hb_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 179void 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 191LOGFONTW * 192hb_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 199HFONT 200hb_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 212struct hb_uniscribe_shaper_shape_plan_data_t {}; 213 214hb_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 222void 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 233hb_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 252retry: 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} 474 475 476