1 Overview of changes leading to 0.9.38 2 Friday, January 23, 2015 3 ===================================== 4 5 - Fix minor out-of-bounds access in Indic shaper. 6 - Change New Tai Lue shaping engine from South-East Asian to default, 7 reflecting change in Unicode encoding model. 8 - Add hb-shape --font-size. Can take up to two numbers for separate 9 x / y size. 10 - Fix CoreText and FreeType scale issues with negative scales. 11 - Reject blobs larger than 2GB. This might break some icu-le-hb clients 12 that need security fixes. See: 13 http://www.icu-project.org/trac/ticket/11450 14 - Avoid accessing font tables during face destruction, in casce rogue 15 clients released face data already. 16 - Fix up gobject-introspection a bit. Python bindings kinda working. 17 See README.python. 18 - Misc fixes. 19 - API additions: 20 hb_ft_face_create_referenced() 21 hb_ft_font_create_referenced() 22 23 24 Overview of changes leading to 0.9.37 25 Wednesday, December 17, 2014 26 ===================================== 27 28 - Fix out-of-bounds access in Context lookup format 3. 29 - Indic: Allow ZWJ/ZWNJ before syllable modifiers. 30 31 32 Overview of changes leading to 0.9.36 33 Thursday, November 20, 2014 34 ===================================== 35 36 - First time that three months went by without a release since 37 0.9.2 was released on August 10, 2012! 38 - Fix performance bug in hb_ot_collect_glyphs(): 39 https://bugzilla.mozilla.org/show_bug.cgi?id=1090869 40 - Add basic vertical-text support to hb-ot-font. 41 - Misc build fixes. 42 43 44 Overview of changes leading to 0.9.35 45 Saturday, August 13, 2014 46 ===================================== 47 48 - Fix major shape-plan caching bug when more than one shaper were 49 provided to hb_shape_full() (as exercised by XeTeX). 50 http://www.mail-archive.com/debian-bugs-dist@lists.debian.org/msg1246370.html 51 - Fix Arabic fallback shaping regression. This was broken in 0.9.32. 52 - Major hb-coretext fixes. That backend is complete now, including 53 respecing buffer direction and language, down to vertical writing. 54 - Build fixes for Windows CE. Should build fine now. 55 - Misc fixes: 56 Use atexit() only if it's safe to call from shared library 57 https://bugs.freedesktop.org/show_bug.cgi?id=82246 58 Mandaic had errors in its Unicode Joining_Type 59 https://bugs.freedesktop.org/show_bug.cgi?id=82306 60 - API changes: 61 62 * hb_buffer_clear_contents() does not reset buffer flags now. 63 64 After 763e5466c0a03a7c27020e1e2598e488612529a7, one doesn't 65 need to set flags for different pieces of text. The flags now 66 are something the client sets up once, depending on how it 67 actually uses the buffer. As such, don't clear it in 68 clear_contents(). 69 70 I don't expect any changes to be needed to any existing client. 71 72 73 Overview of changes leading to 0.9.34 74 Saturday, August 2, 2014 75 ===================================== 76 77 - hb_feature_from_string() now accepts CSS font-feature-settings format. 78 - As a result, hb-shape / hb-view --features also accept CSS-style strings. 79 Eg, "'liga' off" is accepted now. 80 - Add old-spec Myanmar shaper: 81 https://bugs.freedesktop.org/show_bug.cgi?id=81775 82 - Don't apply 'calt' in Hangul shaper. 83 - Fix mark advance zeroing for Hebrew shaper: 84 https://bugs.freedesktop.org/show_bug.cgi?id=76767 85 - Implement Windows-1256 custom Arabic shaping. Only built on Windows, 86 and requires help from get_glyph(). Used by Firefox. 87 https://bugzilla.mozilla.org/show_bug.cgi?id=1045139 88 - Disable 'liga' in vertical text. 89 - Build fixes. 90 - API changes: 91 92 * Make HB_BUFFER_FLAG_BOT/EOT easier to use. 93 94 Previously, we expected users to provide BOT/EOT flags when the 95 text *segment* was at paragraph boundaries. This meant that for 96 clients that provide full paragraph to HarfBuzz (eg. Pango), they 97 had code like this: 98 99 hb_buffer_set_flags (hb_buffer, 100 (item_offset == 0 ? HB_BUFFER_FLAG_BOT : 0) | 101 (item_offset + item_length == paragraph_length ? 102 HB_BUFFER_FLAG_EOT : 0)); 103 104 hb_buffer_add_utf8 (hb_buffer, 105 paragraph_text, paragraph_length, 106 item_offset, item_length); 107 108 After this change such clients can simply say: 109 110 hb_buffer_set_flags (hb_buffer, 111 HB_BUFFER_FLAG_BOT | HB_BUFFER_FLAG_EOT); 112 113 hb_buffer_add_utf8 (hb_buffer, 114 paragraph_text, paragraph_length, 115 item_offset, item_length); 116 117 Ie, HarfBuzz itself checks whether the segment is at the beginning/end 118 of the paragraph. Clients that only pass item-at-a-time to HarfBuzz 119 continue not setting any flags whatsoever. 120 121 Another way to put it is: if there's pre-context text in the buffer, 122 HarfBuzz ignores the BOT flag. If there's post-context, it ignores 123 EOT flag. 124 125 126 Overview of changes leading to 0.9.33 127 Tuesday, July 22, 2014 128 ===================================== 129 130 - Turn off ARabic 'cswh' feature that was accidentally turned on. 131 - Add HB_TAG_MAX_SIGNED. 132 - Make hb_face_make_immutable() really make face immutable! 133 - Windows build fixes. 134 135 136 Overview of changes leading to 0.9.32 137 Thursday, July 17, 2014 138 ===================================== 139 140 - Apply Arabic shaping features in spec order exactly. 141 - Another fix for Mongolian free variation selectors. 142 - For non-Arabic scripts in Arabic shaper apply 'rlig' and 'calt' 143 together. 144 - Minor adjustment to U+FFFD logic. 145 - Fix hb-coretext build. 146 147 148 Overview of changes leading to 0.9.31 149 Wednesday, July 16, 2014 150 ===================================== 151 152 - Only accept valid UTF-8/16/32; we missed many cases before. 153 - Better shaping of invalid UTF-8/16/32. Falls back to 154 U+FFFD REPLACEMENT CHARACTER now. 155 - With all changes in this release, the buffer will contain fully 156 valid Unicode after hb_buffer_add_utf8/16/32 no matter how 157 broken the input is. This can be overriden though. See below. 158 - Fix Mongolian Variation Selectors for fonts without GDEF. 159 - Fix minor invalid buffer access. 160 - Accept zh-Hant and zh-Hans language tags. hb_ot_tag_to_language() 161 now uses these instead of private tags. 162 - Build fixes. 163 - New API: 164 * hb_buffer_add_codepoints(). This does what hb_buffer_add_utf32() 165 used to do, ie. no validity check on the input at all. add_utf32 166 now replaces invalid Unicode codepoints with the replacement 167 character (see below). 168 * hb_buffer_set_replacement_codepoint() 169 * hb_buffer_get_replacement_codepoint() 170 Previously, in hb_buffer_add_utf8 and hb_buffer_add_utf16, when 171 we detected broken input, we replaced that with (hb_codepoint_t)-1. 172 This has changed to use U+FFFD now, but can be changed using these 173 new API. 174 175 176 Overview of changes leading to 0.9.30 177 Wednesday, July 9, 2014 178 ===================================== 179 180 - Update to Unicode 7.0.0: 181 * New scripts Manichaean and Psalter Pahlavi are shaped using 182 Arabic shaper. 183 * All the other new scripts to through the generic shaper for 184 now. 185 - Minor Indic improvements. 186 - Fix graphite2 backend cluster mapping [crasher!] 187 - API changes: 188 * New HB_SCRIPT_* values for Unicode 7.0 scripts. 189 * New function hb_ot_layout_language_get_required_feature(). 190 - Build fixes. 191 192 193 Overview of changes leading to 0.9.29 194 Thursday, May 29, 2014 195 ===================================== 196 197 - Implement cmap in hb-ot-font.h. No variation-selectors yet. 198 - Myanmar: Allow MedialYa+Asat. 199 - Various Indic fixes: 200 * Support most characters in Extended Devanagary and Vedic 201 Unicode blocks. 202 * Allow digits and a some punctuation as consonant placeholders. 203 - Build fixes. 204 205 206 Overview of changes leading to 0.9.28 207 Monday, April 28, 2014 208 ===================================== 209 210 - Unbreak old-spec Indic shaping. (bug 76705) 211 - Fix shaping of U+17DD and U+0FC6. 212 - Add HB_NO_MERGE_CLUSTERS build option. NOT to be enabled by default 213 for shipping libraries. It's an option for further experimentation 214 right now. When we are sure how to do it properly, we will add 215 public run-time API for the functionality. 216 - Build fixes. 217 218 219 Overview of changes leading to 0.9.27 220 Tuesday, March 18, 2014 221 ===================================== 222 223 - Don't use "register" storage class specifier 224 - Wrap definition of free_langs() with HAVE_ATEXIT 225 - Add coretext_aat shaper and hb_coretext_face_create() constructor 226 - If HAVE_ICU_BUILTIN is defined, use hb-icu Unicode callbacks 227 - Add Myanmar test case from OpenType Myanmar spec 228 - Only do fallback Hebrew composition if no GPOS 'mark' available 229 - Allow bootstrapping without gtk-doc 230 - Use AM_MISSING_PROG for ragel and git 231 - Typo in ucdn's Makefile.am 232 - Improve MemoryBarrier() implementation 233 234 235 Overview of changes leading to 0.9.26 236 Thursday, January 30, 2014 237 ===================================== 238 239 - Misc fixes. 240 - Fix application of 'rtlm' feature. 241 - Automatically apply frac/numr/dnom around U+2044 FRACTION SLASH. 242 - New header: hb-ot-shape.h 243 - Uniscribe: fix scratch-buffer accounting. 244 - Reorder Tai Tham SAKOT to after tone-marks. 245 - Add Hangul shaper. 246 - New files: 247 hb-ot-shape-complex-hangul.cc 248 hb-ot-shape-complex-hebrew.cc 249 hb-ot-shape-complex-tibetan.cc 250 - Disable 'cswh' feature in Arabic shaper. 251 - Coretext: better handle surrogate pairs. 252 - Add HB_TAG_MAX and _HB_SCRIPT_MAX_VALUE. 253 254 255 Overview of changes leading to 0.9.25 256 Wednesday, December 4, 2013 257 ===================================== 258 259 - Myanmar shaper improvements. 260 - Avoid font fallback in CoreText backend. 261 - Additional OpenType language tag mappiongs. 262 - More aggressive shape-plan caching. 263 - Build with / require automake 1.13. 264 - Build with libtool 2.4.2.418 alpha to support ppc64le. 265 266 267 Overview of changes leading to 0.9.24 268 Tuesday, November 13, 2013 269 ===================================== 270 271 - Misc compiler warning fixes with clang. 272 - No functional changes. 273 274 275 Overview of changes leading to 0.9.23 276 Monday, October 28, 2013 277 ===================================== 278 279 - "Udupi HarfBuzz Hackfest", Paris, October 14..18 2013. 280 - Fix (Chain)Context recursion with non-monotone lookup positions. 281 - Misc Indic bug fixes. 282 - New Javanese / Buginese shaping, similar to Windows 8.1. 283 284 285 Overview of changes leading to 0.9.22 286 Thursday, October 3, 2013 287 ===================================== 288 289 - Fix use-after-end-of-scope in hb_language_from_string(). 290 - Fix hiding of default_ignorables if font doesn't have space glyph. 291 - Protect against out-of-range lookup indices. 292 293 - API Changes: 294 295 * Added hb_ot_layout_table_get_lookup_count() 296 297 298 Overview of changes leading to 0.9.21 299 Monday, September 16, 2013 300 ===================================== 301 302 - Rename gobject-introspection library name from harfbuzz to HarfBuzz. 303 - Remove (long disabled) hb-old and hb-icu-le test shapers. 304 - Misc gtk-doc and gobject-introspection annotations. 305 - Misc fixes. 306 - API changes: 307 308 * Add HB_SET_VALUE_INVALID 309 310 Overview of changes leading to 0.9.20 311 Thursday, August 29, 2013 312 ===================================== 313 314 General: 315 - Misc substitute_closure() fixes. 316 - Build fixes. 317 318 Documentation: 319 - gtk-doc boilerplate integrated. Docs are built now, but 320 contain no contents. By next release hopefully we have 321 some content in. Enable using --enable-gtk-doc. 322 323 GObject and Introspection: 324 - Added harfbuzz-gobject library (hb-gobject.h) that has type 325 bindings for all HarfBuzz objects and enums. Enable using 326 --with-gobject. 327 - Added gobject-introspection boilerplate. Nothing useful 328 right now. Work in progress. Gets enabled automatically if 329 --with-gobject is used. Override with --disable-introspection. 330 331 OpenType shaper: 332 - Apply 'mark' in Myanmar shaper. 333 - Don't apply 'dlig' by default. 334 335 Uniscribe shaper: 336 - Support user features. 337 - Fix loading of fonts that are also installed on the system. 338 - Fix shaping of Arabic Presentation Forms. 339 - Fix build with wide chars. 340 341 CoreText shaper: 342 - Support user features. 343 344 Source changes: 345 - hb_face_t code moved to hb-face.h / hb-face.cc. 346 - Added hb-deprecated.h. 347 348 API changes: 349 - Added HB_DISABLE_DEPRECATED. 350 - Deprecated HB_SCRIPT_CANADIAN_ABORIGINAL; replaced by 351 HB_SCRIPT_CANADIAN_SYLLABICS. 352 - Deprecated HB_BUFFER_FLAGS_DEFAULT; replaced by 353 HB_BUFFER_FLAG_DEFAULT. 354 - Deprecated HB_BUFFER_SERIALIZE_FLAGS_DEFAULT; replaced by 355 HB_BUFFER_SERIALIZE_FLAG_DEFAULT. 356 357 358 Overview of changes leading to 0.9.19 359 Tuesday, July 16, 2013 360 ===================================== 361 362 - Build fixes. 363 - Better handling of multiple variation selectors in a row. 364 - Pass on variation selector to GSUB if not consumed by cmap. 365 - Fix undefined memory access. 366 - Add Javanese config to Indic shaper. 367 - Misc bug fixes. 368 369 Overview of changes leading to 0.9.18 370 Tuesday, May 28, 2013 371 ===================================== 372 373 New build system: 374 375 - All unneeded code is all disabled by default, 376 377 - Uniscribe and CoreText shapers can be enabled with their --with options, 378 379 - icu_le and old shapers cannot be enabled for now, 380 381 - glib, freetype, and cairo will be detected automatically. 382 They can be force on/off'ed with their --with options, 383 384 - icu and graphite2 are default off, can be enabled with their --with 385 options, 386 387 Moreover, ICU support is now build into a separate library: 388 libharfbuzz-icu.so, and a new harfbuzz-icu.pc is shipped for it. 389 Distros can enable ICU now without every application on earth 390 getting linked to via libharfbuzz.so. 391 392 For distros I recommend that they make sure they are building --with-glib 393 --with-freetype --with-cairo, --with-icu, and optionally --with-graphite2; 394 And package harfbuzz and harfbuzz-icu separately. 395 396 397 Overview of changes leading to 0.9.17 398 Monday, May 20, 2013 399 ===================================== 400 401 - Build fixes. 402 - Fix bug in hb_set_get_min(). 403 - Fix regression with Arabic mark positioning / width-zeroing. 404 405 Overview of changes leading to 0.9.16 406 Friday, April 19, 2013 407 ===================================== 408 409 - Major speedup in OpenType lookup processing. With the Amiri 410 Arabic font, this release is over 3x faster than previous 411 release. All scripts / languages should see this speedup. 412 413 - New --num-iterations option for hb-shape / hb-view; useful for 414 profiling. 415 416 Overview of changes leading to 0.9.15 417 Friday, April 05, 2013 418 ===================================== 419 420 - Build fixes. 421 - Fix crasher in graphite2 shaper. 422 - Fix Arabic mark width zeroing regression. 423 - Don't compose Hangul jamo into Unicode syllables. 424 425 426 Overview of changes leading to 0.9.14 427 Thursday, March 21, 2013 428 ===================================== 429 430 - Build fixes. 431 - Fix time-consuming sanitize with malicious fonts. 432 - Implement hb_buffer_deserialize_glyphs() for both json and text. 433 - Do not ignore Hangul filler characters. 434 - Indic fixes: 435 * Fix Malayalam pre-base reordering interaction with post-forms. 436 * Further adjust ZWJ handling. Should fix known regressions from 437 0.9.13. 438 439 440 Overview of changes leading to 0.9.13 441 Thursday, February 25, 2013 442 ===================================== 443 444 - Build fixes. 445 - Ngapi HarfBuzz Hackfest in London (February 2013): 446 * Fixed all known Indic bugs, 447 * New Win8-style Myanmar shaper, 448 * New South-East Asian shaper for Tai Tham, Cham, and New Tai Lue, 449 * Smartly ignore Default_Ignorable characters (joiners, etc) wheb 450 matching GSUB/GPOS lookups, 451 * Fix 'Phags-Pa U+A872 shaping, 452 * Fix partial disabling of default-on features, 453 * Allow disabling of TrueType kerning. 454 - Fix possible crasher with broken fonts with overlapping tables. 455 - Removed generated files from git again. So, one needs ragel to 456 bootstrap from the git tree. 457 458 API changes: 459 - hb_shape() and related APIs now abort if buffer direction is 460 HB_DIRECTION_INVALID. Previously, hb_shape() was calling 461 hb_buffer_guess_segment_properties() on the buffer before 462 shaping. The heuristics in that function are fragile. If the 463 user really wants the old behvaior, they can call that function 464 right before calling hb_shape() to get the old behavior. 465 - hb_blob_create_sub_blob() always creates sub-blob with 466 HB_MEMORY_MODE_READONLY. See comments for the reason. 467 468 469 Overview of changes leading to 0.9.12 470 Thursday, January 18, 2013 471 ===================================== 472 473 - Build fixes for Sun compiler. 474 - Minor bug fix. 475 476 Overview of changes leading to 0.9.11 477 Thursday, January 10, 2013 478 ===================================== 479 480 - Build fixes. 481 - Fix GPOS mark attachment with null Anchor offsets. 482 - [Indic] Fix old-spec reordering of viramas if sequence ends in one. 483 - Fix multi-threaded shaper data creation crash. 484 - Add atomic ops for Solaris. 485 486 API changes: 487 - Rename hb_buffer_clear() to hb_buffer_clear_contents(). 488 489 490 Overview of changes leading to 0.9.10 491 Thursday, January 3, 2013 492 ===================================== 493 494 - [Indic] Fixed rendering of Malayalam dot-reph 495 - Updated OT language tags. 496 - Updated graphite2 backend. 497 - Improved hb_ot_layout_get_size_params() logic. 498 - Improve hb-shape/hb-view help output. 499 - Fixed hb-set.h implementation to not crash. 500 - Fixed various issues with hb_ot_layout_collect_lookups(). 501 - Various build fixes. 502 503 New API: 504 505 hb_graphite2_face_get_gr_face() 506 hb_graphite2_font_get_gr_font() 507 hb_coretext_face_get_cg_font() 508 509 Modified API: 510 511 hb_ot_layout_get_size_params() 512 513 514 Overview of changes leading to 0.9.9 515 Wednesday, December 5, 2012 516 ==================================== 517 518 - Fix build on Windows. 519 - Minor improvements. 520 521 522 Overview of changes leading to 0.9.8 523 Tuesday, December 4, 2012 524 ==================================== 525 526 527 - Actually implement hb_shape_plan_get_shaper (). 528 - Make UCDB data tables const. 529 - Lots of internal refactoring in OTLayout tables. 530 - Flesh out hb_ot_layout_lookup_collect_glyphs(). 531 532 New API: 533 534 hb_ot_layout_collect_lookups() 535 hb_ot_layout_get_size_params() 536 537 538 Overview of changes leading to 0.9.7 539 Sunday, November 21, 2012 540 ==================================== 541 542 543 HarfBuzz "All-You-Can-Eat-Sushi" (aka Vancouver) Hackfest and follow-on fixes. 544 545 - Fix Arabic contextual joining using pre-context text. 546 - Fix Sinhala "split matra" mess. 547 - Fix Khmer shaping with broken fonts. 548 - Implement Thai "PUA" shaping for old fonts. 549 - Do NOT route Kharoshthi script through the Indic shaper. 550 - Disable fallback positioning for Indic and Thai shapers. 551 - Misc fixes. 552 553 554 hb-shape / hb-view changes: 555 556 - Add --text-before and --text-after 557 - Add --bot / --eot / --preserve-default-ignorables 558 - hb-shape --output-format=json 559 560 561 New API: 562 563 hb_buffer_clear() 564 565 hb_buffer_flags_t 566 567 HB_BUFFER_FLAGS_DEFAULT 568 HB_BUFFER_FLAG_BOT 569 HB_BUFFER_FLAG_EOT 570 HB_BUFFER_FLAG_PRESERVE_DEFAULT_IGNORABLES 571 572 hb_buffer_set_flags() 573 hb_buffer_get_flags() 574 575 HB_BUFFER_SERIALIZE_FLAGS 576 hb_buffer_serialize_glyphs() 577 hb_buffer_deserialize_glyphs() 578 hb_buffer_serialize_list_formats() 579 580 hb_set_add_range() 581 hb_set_del_range() 582 hb_set_get_population() 583 hb_set_next_range() 584 585 hb_face_[sg]et_glyph_count() 586 587 hb_segment_properties_t 588 HB_SEGMENT_PROPERTIES_DEFAULT 589 hb_segment_properties_equal() 590 hb_segment_properties_hash() 591 592 hb_buffer_set_segment_properties() 593 hb_buffer_get_segment_properties() 594 595 hb_ot_layout_glyph_class_t 596 hb_ot_layout_get_glyph_class() 597 hb_ot_layout_get_glyphs_in_class() 598 599 hb_shape_plan_t 600 hb_shape_plan_create() 601 hb_shape_plan_create_cached() 602 hb_shape_plan_get_empty() 603 hb_shape_plan_reference() 604 hb_shape_plan_destroy() 605 hb_shape_plan_set_user_data() 606 hb_shape_plan_get_user_data() 607 hb_shape_plan_execute() 608 hb_shape_plan_get_shaper() 609 610 hb_ot_shape_plan_collect_lookups() 611 612 613 API changes: 614 615 - Remove "mask" parameter from hb_buffer_add(). 616 - Rename hb_ot_layout_would_substitute_lookup() and hb_ot_layout_substitute_closure_lookup(). 617 - hb-set.h API const correction. 618 - Renamed hb_set_min/max() to hb_set_get_min/max(). 619 - Rename hb_ot_layout_feature_get_lookup_indexes() to hb_ot_layout_feature_get_lookups(). 620 - Rename hb_buffer_guess_properties() to hb_buffer_guess_segment_properties(). 621 622 623 624 Overview of changes leading to 0.9.6 625 Sunday, November 13, 2012 626 ==================================== 627 628 - Don't clear pre-context text if no new context is provided. 629 - Fix ReverseChainingSubstLookup, which was totally borked. 630 - Adjust output format of hb-shape a bit. 631 - Include config.h.in in-tree. Makes it easier for alternate build systems. 632 - Fix hb_buffer_set_length(buffer, 0) invalid memory allocation. 633 - Use ICU LayoutEngine's C API instead of C++. Avoids much headache. 634 - Drop glyphs for all of Unicode Default_Ignorable characters. 635 - Misc build fixes. 636 637 Arabic shaper: 638 - Enable 'dlig' and 'mset' features in Arabic shaper. 639 - Implement 'Phags-pa shaping, improve Mongolian. 640 641 Indic shaper: 642 - Decompose Sinhala split matras the way old HarfBuzz / Pango did. 643 - Initial support for Consonant Medials. 644 - Start adding new-style Myanmar shaping. 645 - Make reph and 'pref' logic introspect the font. 646 - Route Meetei-Mayek through the Indic shaper. 647 - Don't apply 'liga' in Indic shaper. 648 - Improve Malayalam pre-base reordering Ra interaction with Chillus. 649 650 651 652 Overview of changes leading to 0.9.5 653 Sunday, October 14, 2012 654 ==================================== 655 656 - Synthetic-GSUB Arabic fallback shaping. 657 658 - Misc Indic improvements. 659 660 - Add build system support for pthread. 661 662 - Imported UCDN for in-tree Unicode callbacks implementation. 663 664 - Context-aware Arabic joining. 665 666 - Misc other fixes. 667 668 - New API: 669 670 hb_feature_to/from-string() 671 hb_buffer_[sg]et_content_type() 672 673 674 675 Overview of changes leading to 0.9.4 676 Tuesday, Sep 03, 2012 677 ==================================== 678 679 - Indic improvements with old-spec Malayalam. 680 681 - Better fallback glyph positioning, specially with Thai / Lao marks. 682 683 - Implement dotted-circle insertion. 684 685 - Better Arabic fallback shaping / ligation. 686 687 - Added ICU LayoutEngine backend for testing. Call it by the 'icu_le' name. 688 689 - Misc fixes. 690 691 692 693 Overview of changes leading to 0.9.3 694 Friday, Aug 18, 2012 695 ==================================== 696 697 - Fixed fallback mark positioning for left-to-right text. 698 699 - Improve mark positioning for the remaining combining classes. 700 701 - Unbreak Thai and fallback Arabic shaping. 702 703 - Port Arabic shaper to shape-plan caching. 704 705 - Use new ICU normalizer functions. 706 707 708 709 Overview of changes leading to 0.9.2 710 Friday, Aug 10, 2012 711 ==================================== 712 713 - Over a thousand commits! This is the first major release of HarfBuzz. 714 715 - HarfBuzz is feature-complete now! It should be in par, or better, than 716 both Pango's shapers and old HarfBuzz / Qt shapers. 717 718 - New Indic shaper, supporting main Indic scripts, Sinhala, and Khmer. 719 720 - Improved Arabic shaper, with fallback Arabic shaping, supporting Arabic, 721 Sinhala, N'ko, Mongolian, and Mandaic. 722 723 - New Thai / Lao shaper. 724 725 - Tibetan / Hangul support in the generic shaper. 726 727 - Synthetic GDEF support for fonts without a GDEF table. 728 729 - Fallback mark positioning for fonts without a GPOS table. 730 731 - Unicode normalization shaping heuristic during glyph mapping. 732 733 - New experimental Graphite2 backend. 734 735 - New Uniscribe backend (primarily for testing). 736 737 - New CoreText backend (primarily for testing). 738 739 - Major optimization and speedup. 740 741 - Test suites and testing infrastructure (work in progress). 742 743 - Greatly improved hb-view cmdline tool. 744 745 - hb-shape cmdline tool. 746 747 - Unicode 6.1 support. 748 749 Summary of API changes: 750 751 o Changed API: 752 753 - Users are expected to only include main header files now (ie. hb.h, 754 hb-glib.h, hb-ft.h, ...) 755 756 - All struct tag names had their initial underscore removed. 757 Ie. "struct _hb_buffer_t" is "struct hb_buffer_t" now. 758 759 - All set_user_data() functions now take a "replace" boolean parameter. 760 761 - hb_buffer_create() takes zero arguments now. 762 Use hb_buffer_pre_allocate() to pre-allocate. 763 764 - hb_buffer_add_utf*() now accept -1 for length parameteres, 765 meaning "nul-terminated". 766 767 - hb_direction_t enum values changed. 768 769 - All *_from_string() APIs now take a length parameter to allow for 770 non-nul-terminated strings. A -1 length means "nul-terminated". 771 772 - Typedef for hb_language_t changed. 773 774 - hb_get_table_func_t renamed to hb_reference_table_func_t. 775 776 - hb_ot_layout_table_choose_script() 777 778 - Various renames in hb-unicode.h. 779 780 o New API: 781 782 - hb_buffer_guess_properties() 783 Automatically called by hb_shape(). 784 785 - hb_buffer_normalize_glyphs() 786 787 - hb_tag_from_string() 788 789 - hb-coretext.h 790 791 - hb-uniscribe.h 792 793 - hb_face_reference_blob() 794 - hb_face_[sg]et_index() 795 - hb_face_set_upem() 796 797 - hb_font_get_glyph_name_func_t 798 hb_font_get_glyph_from_name_func_t 799 hb_font_funcs_set_glyph_name_func() 800 hb_font_funcs_set_glyph_from_name_func() 801 hb_font_get_glyph_name() 802 hb_font_get_glyph_from_name() 803 hb_font_glyph_to_string() 804 hb_font_glyph_from_string() 805 806 - hb_font_set_funcs_data() 807 808 - hb_ft_font_set_funcs() 809 - hb_ft_font_get_face() 810 811 - hb-gobject.h (work in progress) 812 813 - hb_ot_shape_glyphs_closure() 814 hb_ot_layout_substitute_closure_lookup() 815 816 - hb-set.h 817 818 - hb_shape_full() 819 820 - hb_unicode_combining_class_t 821 822 - hb_unicode_compose_func_t 823 hb_unicode_decompose_func_t 824 hb_unicode_decompose_compatibility_func_t 825 hb_unicode_funcs_set_compose_func() 826 hb_unicode_funcs_set_decompose_func() 827 hb_unicode_funcs_set_decompose_compatibility_func() 828 hb_unicode_compose() 829 hb_unicode_decompose() 830 hb_unicode_decompose_compatibility() 831 832 o Removed API: 833 834 - hb_ft_get_font_funcs() 835 836 - hb_ot_layout_substitute_start() 837 hb_ot_layout_substitute_lookup() 838 hb_ot_layout_substitute_finish() 839 hb_ot_layout_position_start() 840 hb_ot_layout_position_lookup() 841 hb_ot_layout_position_finish() 842 843 844 845 Overview of changes leading to 0.6.0 846 Friday, May 27, 2011 847 ==================================== 848 849 - Vertical text support in GPOS 850 - Almost all API entries have unit tests now, under test/ 851 - All thread-safety issues are fixed 852 853 Summary of API changes follows. 854 855 856 * Simple Types API: 857 858 o New API: 859 HB_LANGUAGE_INVALID 860 hb_language_get_default() 861 hb_direction_to_string() 862 hb_direction_from_string() 863 hb_script_get_horizontal_direction() 864 HB_UNTAG() 865 866 o Renamed API: 867 hb_category_t renamed to hb_unicode_general_category_t 868 869 o Changed API: 870 hb_language_t is a typed pointers now 871 872 o Removed API: 873 HB_TAG_STR() 874 875 876 * Use ISO 15924 tags for hb_script_t: 877 878 o New API: 879 hb_script_from_iso15924_tag() 880 hb_script_to_iso15924_tag() 881 hb_script_from_string() 882 883 o Changed API: 884 HB_SCRIPT_* enum members changed value. 885 886 887 * Buffer API streamlined: 888 889 o New API: 890 hb_buffer_reset() 891 hb_buffer_set_length() 892 hb_buffer_allocation_successful() 893 894 o Renamed API: 895 hb_buffer_ensure() renamed to hb_buffer_pre_allocate() 896 hb_buffer_add_glyph() renamed to hb_buffer_add() 897 898 o Removed API: 899 hb_buffer_clear() 900 hb_buffer_clear_positions() 901 902 o Changed API: 903 hb_buffer_get_glyph_infos() takes an out length parameter now 904 hb_buffer_get_glyph_positions() takes an out length parameter now 905 906 907 * Blob API streamlined: 908 909 o New API: 910 hb_blob_get_data() 911 hb_blob_get_data_writable() 912 913 o Renamed API: 914 hb_blob_create_empty() renamed to hb_blob_get_empty() 915 916 o Removed API: 917 hb_blob_lock() 918 hb_blob_unlock() 919 hb_blob_is_writable() 920 hb_blob_try_writable() 921 922 o Changed API: 923 hb_blob_create() takes user_data before destroy now 924 925 926 * Unicode functions API: 927 928 o Unicode function vectors can subclass other unicode function vectors now. 929 Unimplemented callbacks in the subclass automatically chainup to the parent. 930 931 o All hb_unicode_funcs_t callbacks take a user_data now. Their setters 932 take a user_data and its respective destroy callback. 933 934 o New API: 935 hb_unicode_funcs_get_empty() 936 hb_unicode_funcs_get_default() 937 hb_unicode_funcs_get_parent() 938 939 o Changed API: 940 hb_unicode_funcs_create() now takes a parent_funcs. 941 942 o Removed func getter functions: 943 hb_unicode_funcs_get_mirroring_func() 944 hb_unicode_funcs_get_general_category_func() 945 hb_unicode_funcs_get_script_func() 946 hb_unicode_funcs_get_combining_class_func() 947 hb_unicode_funcs_get_eastasian_width_func() 948 949 950 * Face API: 951 952 o Renamed API: 953 hb_face_get_table() renamed to hb_face_reference_table() 954 hb_face_create_for_data() renamed to hb_face_create() 955 956 o Changed API: 957 hb_face_create_for_tables() takes user_data before destroy now 958 hb_face_reference_table() returns empty blob instead of NULL 959 hb_get_table_func_t accepts the face as first parameter now 960 961 * Font API: 962 963 o Fonts can subclass other fonts now. Unimplemented callbacks in the 964 subclass automatically chainup to the parent. When chaining up, 965 scale is adjusted if the parent font has a different scale. 966 967 o All hb_font_funcs_t callbacks take a user_data now. Their setters 968 take a user_data and its respective destroy callback. 969 970 o New API: 971 hb_font_get_parent() 972 hb_font_funcs_get_empty() 973 hb_font_create_sub_font() 974 975 o Removed API: 976 hb_font_funcs_copy() 977 hb_font_unset_funcs() 978 979 o Removed func getter functions: 980 hb_font_funcs_get_glyph_func() 981 hb_font_funcs_get_glyph_advance_func() 982 hb_font_funcs_get_glyph_extents_func() 983 hb_font_funcs_get_contour_point_func() 984 hb_font_funcs_get_kerning_func() 985 986 o Changed API: 987 hb_font_create() takes a face and references it now 988 hb_font_set_funcs() takes user_data before destroy now 989 hb_font_set_scale() accepts signed integers now 990 hb_font_get_contour_point_func_t now takes glyph first, then point_index 991 hb_font_get_glyph_func_t returns a success boolean now 992 993 994 * Changed object model: 995 996 o All object types have a _get_empty() now: 997 hb_blob_get_empty() 998 hb_buffer_get_empty() 999 hb_face_get_empty() 1000 hb_font_get_empty() 1001 hb_font_funcs_get_empty() 1002 hb_unicode_funcs_get_empty() 1003 1004 o Added _set_user_data() and _get_user_data() for all object types: 1005 hb_blob_get_user_data() 1006 hb_blob_set_user_data() 1007 hb_buffer_get_user_data() 1008 hb_buffer_set_user_data() 1009 hb_face_get_user_data() 1010 hb_face_set_user_data() 1011 hb_font_funcs_get_user_data() 1012 hb_font_funcs_set_user_data() 1013 hb_font_get_user_data() 1014 hb_font_set_user_data() 1015 hb_unicode_funcs_get_user_data() 1016 hb_unicode_funcs_set_user_data() 1017 1018 o Removed the _get_reference_count() from all object types: 1019 hb_blob_get_reference_count() 1020 hb_buffer_get_reference_count() 1021 hb_face_get_reference_count() 1022 hb_font_funcs_get_reference_count() 1023 hb_font_get_reference_count() 1024 hb_unicode_funcs_get_reference_count() 1025 1026 o Added _make_immutable() and _is_immutable() for all object types except for buffer: 1027 hb_blob_make_immutable() 1028 hb_blob_is_immutable() 1029 hb_face_make_immutable() 1030 hb_face_is_immutable() 1031 1032 1033 * Changed API for vertical text support 1034 1035 o The following callbacks where removed: 1036 hb_font_get_glyph_advance_func_t 1037 hb_font_get_kerning_func_t 1038 1039 o The following new callbacks added instead: 1040 hb_font_get_glyph_h_advance_func_t 1041 hb_font_get_glyph_v_advance_func_t 1042 hb_font_get_glyph_h_origin_func_t 1043 hb_font_get_glyph_v_origin_func_t 1044 hb_font_get_glyph_h_kerning_func_t 1045 hb_font_get_glyph_v_kerning_func_t 1046 1047 o The following API removed as such: 1048 hb_font_funcs_set_glyph_advance_func() 1049 hb_font_funcs_set_kerning_func() 1050 hb_font_get_glyph_advance() 1051 hb_font_get_kerning() 1052 1053 o New API added instead: 1054 hb_font_funcs_set_glyph_h_advance_func() 1055 hb_font_funcs_set_glyph_v_advance_func() 1056 hb_font_funcs_set_glyph_h_origin_func() 1057 hb_font_funcs_set_glyph_v_origin_func() 1058 hb_font_funcs_set_glyph_h_kerning_func() 1059 hb_font_funcs_set_glyph_v_kerning_func() 1060 hb_font_get_glyph_h_advance() 1061 hb_font_get_glyph_v_advance() 1062 hb_font_get_glyph_h_origin() 1063 hb_font_get_glyph_v_origin() 1064 hb_font_get_glyph_h_kerning() 1065 hb_font_get_glyph_v_kerning() 1066 1067 o The following higher-leve API added for convenience: 1068 hb_font_get_glyph_advance_for_direction() 1069 hb_font_get_glyph_origin_for_direction() 1070 hb_font_add_glyph_origin_for_direction() 1071 hb_font_subtract_glyph_origin_for_direction() 1072 hb_font_get_glyph_kerning_for_direction() 1073 hb_font_get_glyph_extents_for_origin() 1074 hb_font_get_glyph_contour_point_for_origin() 1075 1076 1077 * OpenType Layout API: 1078 1079 o New API: 1080 hb_ot_layout_position_start() 1081 hb_ot_layout_substitute_start() 1082 hb_ot_layout_substitute_finish() 1083 1084 1085 * Glue code: 1086 1087 o New API: 1088 hb_glib_script_to_script() 1089 hb_glib_script_from_script() 1090 hb_icu_script_to_script() 1091 hb_icu_script_from_script() 1092 1093 1094 * Version API added: 1095 1096 o New API: 1097 HB_VERSION_MAJOR 1098 HB_VERSION_MINOR 1099 HB_VERSION_MICRO 1100 HB_VERSION_STRING 1101 HB_VERSION_CHECK() 1102 hb_version() 1103 hb_version_string() 1104 hb_version_check() 1105 1106 1107
