docs/reference/ft2-outline_processing.html

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  97             FreeType-2.13.2 API Reference
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 100         <div class="md-header__topic" data-md-component="header-topic">
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 103               Outline Processing
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 169     FreeType-2.13.2 API Reference
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 183         TOC
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 198         Index
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 224           General Remarks
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 227
 228
 229
 230
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 232     <li class="md-nav__item">
 233       <a href="ft2-preamble.html" class="md-nav__link">
 234         Preamble
 235       </a>
 236     </li>
 237
 238
 239
 240
 241
 242
 243
 244     <li class="md-nav__item">
 245       <a href="ft2-header_inclusion.html" class="md-nav__link">
 246         FreeType's header inclusion scheme
 247       </a>
 248     </li>
 249
 250
 251
 252
 253
 254
 255
 256     <li class="md-nav__item">
 257       <a href="ft2-user_allocation.html" class="md-nav__link">
 258         User allocation
 259       </a>
 260     </li>
 261
 262
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 264         </ul>
 265       </nav>
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 282
 283       <label class="md-nav__link" for="__nav_4">
 284         Core API
 285         <span class="md-nav__icon md-icon"></span>
 286       </label>
 287       <nav class="md-nav" aria-label="Core API" data-md-level="1">
 288         <label class="md-nav__title" for="__nav_4">
 289           <span class="md-nav__icon md-icon"></span>
 290           Core API
 291         </label>
 292         <ul class="md-nav__list" data-md-scrollfix>
 293
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 299       <a href="ft2-basic_types.html" class="md-nav__link">
 300         Basic Data Types
 301       </a>
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 311       <a href="ft2-library_setup.html" class="md-nav__link">
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 323       <a href="ft2-face_creation.html" class="md-nav__link">
 324         Face Creation
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 326     </li>
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 335       <a href="ft2-font_testing_macros.html" class="md-nav__link">
 336         Font Testing Macros
 337       </a>
 338     </li>
 339
 340
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 342
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 346     <li class="md-nav__item">
 347       <a href="ft2-sizing_and_scaling.html" class="md-nav__link">
 348         Sizing and Scaling
 349       </a>
 350     </li>
 351
 352
 353
 354
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 357
 358     <li class="md-nav__item">
 359       <a href="ft2-glyph_retrieval.html" class="md-nav__link">
 360         Glyph Retrieval
 361       </a>
 362     </li>
 363
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 370     <li class="md-nav__item">
 371       <a href="ft2-character_mapping.html" class="md-nav__link">
 372         Character Mapping
 373       </a>
 374     </li>
 375
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 382     <li class="md-nav__item">
 383       <a href="ft2-information_retrieval.html" class="md-nav__link">
 384         Information Retrieval
 385       </a>
 386     </li>
 387
 388
 389
 390
 391
 392
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 394     <li class="md-nav__item">
 395       <a href="ft2-other_api_data.html" class="md-nav__link">
 396         Other API Data
 397       </a>
 398     </li>
 399
 400
 401
 402         </ul>
 403       </nav>
 404     </li>
 405
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 420
 421       <label class="md-nav__link" for="__nav_5">
 422         Extended API
 423         <span class="md-nav__icon md-icon"></span>
 424       </label>
 425       <nav class="md-nav" aria-label="Extended API" data-md-level="1">
 426         <label class="md-nav__title" for="__nav_5">
 427           <span class="md-nav__icon md-icon"></span>
 428           Extended API
 429         </label>
 430         <ul class="md-nav__list" data-md-scrollfix>
 431
 432
 433
 434
 435
 436     <li class="md-nav__item">
 437       <a href="ft2-glyph_variants.html" class="md-nav__link">
 438         Unicode Variation Sequences
 439       </a>
 440     </li>
 441
 442
 443
 444
 445
 446
 447
 448     <li class="md-nav__item">
 449       <a href="ft2-color_management.html" class="md-nav__link">
 450         Glyph Color Management
 451       </a>
 452     </li>
 453
 454
 455
 456
 457
 458
 459
 460     <li class="md-nav__item">
 461       <a href="ft2-layer_management.html" class="md-nav__link">
 462         Glyph Layer Management
 463       </a>
 464     </li>
 465
 466
 467
 468
 469
 470
 471
 472     <li class="md-nav__item">
 473       <a href="ft2-glyph_management.html" class="md-nav__link">
 474         Glyph Management
 475       </a>
 476     </li>
 477
 478
 479
 480
 481
 482
 483
 484     <li class="md-nav__item">
 485       <a href="ft2-mac_specific.html" class="md-nav__link">
 486         Mac Specific Interface
 487       </a>
 488     </li>
 489
 490
 491
 492
 493
 494
 495
 496     <li class="md-nav__item">
 497       <a href="ft2-sizes_management.html" class="md-nav__link">
 498         Size Management
 499       </a>
 500     </li>
 501
 502
 503
 504
 505
 506
 507
 508     <li class="md-nav__item">
 509       <a href="ft2-header_file_macros.html" class="md-nav__link">
 510         Header File Macros
 511       </a>
 512     </li>
 513
 514
 515
 516         </ul>
 517       </nav>
 518     </li>
 519
 520
 521
 522
 523
 524
 525
 526
 527
 528
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 530     <li class="md-nav__item md-nav__item--nested">
 531
 532
 533         <input class="md-nav__toggle md-toggle" data-md-toggle="__nav_6" type="checkbox" id="__nav_6" >
 534
 535       <label class="md-nav__link" for="__nav_6">
 536         Format-Specific API
 537         <span class="md-nav__icon md-icon"></span>
 538       </label>
 539       <nav class="md-nav" aria-label="Format-Specific API" data-md-level="1">
 540         <label class="md-nav__title" for="__nav_6">
 541           <span class="md-nav__icon md-icon"></span>
 542           Format-Specific API
 543         </label>
 544         <ul class="md-nav__list" data-md-scrollfix>
 545
 546
 547
 548
 549
 550     <li class="md-nav__item">
 551       <a href="ft2-multiple_masters.html" class="md-nav__link">
 552         Multiple Masters
 553       </a>
 554     </li>
 555
 556
 557
 558
 559
 560
 561
 562     <li class="md-nav__item">
 563       <a href="ft2-truetype_tables.html" class="md-nav__link">
 564         TrueType Tables
 565       </a>
 566     </li>
 567
 568
 569
 570
 571
 572
 573
 574     <li class="md-nav__item">
 575       <a href="ft2-type1_tables.html" class="md-nav__link">
 576         Type 1 Tables
 577       </a>
 578     </li>
 579
 580
 581
 582
 583
 584
 585
 586     <li class="md-nav__item">
 587       <a href="ft2-sfnt_names.html" class="md-nav__link">
 588         SFNT Names
 589       </a>
 590     </li>
 591
 592
 593
 594
 595
 596
 597
 598     <li class="md-nav__item">
 599       <a href="ft2-bdf_fonts.html" class="md-nav__link">
 600         BDF and PCF Files
 601       </a>
 602     </li>
 603
 604
 605
 606
 607
 608
 609
 610     <li class="md-nav__item">
 611       <a href="ft2-cid_fonts.html" class="md-nav__link">
 612         CID Fonts
 613       </a>
 614     </li>
 615
 616
 617
 618
 619
 620
 621
 622     <li class="md-nav__item">
 623       <a href="ft2-pfr_fonts.html" class="md-nav__link">
 624         PFR Fonts
 625       </a>
 626     </li>
 627
 628
 629
 630
 631
 632
 633
 634     <li class="md-nav__item">
 635       <a href="ft2-winfnt_fonts.html" class="md-nav__link">
 636         Window FNT Files
 637       </a>
 638     </li>
 639
 640
 641
 642
 643
 644
 645
 646     <li class="md-nav__item">
 647       <a href="ft2-svg_fonts.html" class="md-nav__link">
 648         OpenType SVG Fonts
 649       </a>
 650     </li>
 651
 652
 653
 654
 655
 656
 657
 658     <li class="md-nav__item">
 659       <a href="ft2-font_formats.html" class="md-nav__link">
 660         Font Formats
 661       </a>
 662     </li>
 663
 664
 665
 666
 667
 668
 669
 670     <li class="md-nav__item">
 671       <a href="ft2-gasp_table.html" class="md-nav__link">
 672         Gasp Table
 673       </a>
 674     </li>
 675
 676
 677
 678         </ul>
 679       </nav>
 680     </li>
 681
 682
 683
 684
 685
 686
 687
 688
 689
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 693
 694
 695         <input class="md-nav__toggle md-toggle" data-md-toggle="__nav_7" type="checkbox" id="__nav_7" >
 696
 697       <label class="md-nav__link" for="__nav_7">
 698         Controlling FreeType Modules
 699         <span class="md-nav__icon md-icon"></span>
 700       </label>
 701       <nav class="md-nav" aria-label="Controlling FreeType Modules" data-md-level="1">
 702         <label class="md-nav__title" for="__nav_7">
 703           <span class="md-nav__icon md-icon"></span>
 704           Controlling FreeType Modules
 705         </label>
 706         <ul class="md-nav__list" data-md-scrollfix>
 707
 708
 709
 710
 711
 712     <li class="md-nav__item">
 713       <a href="ft2-auto_hinter.html" class="md-nav__link">
 714         The auto-hinter
 715       </a>
 716     </li>
 717
 718
 719
 720
 721
 722
 723
 724     <li class="md-nav__item">
 725       <a href="ft2-cff_driver.html" class="md-nav__link">
 726         The CFF driver
 727       </a>
 728     </li>
 729
 730
 731
 732
 733
 734
 735
 736     <li class="md-nav__item">
 737       <a href="ft2-t1_cid_driver.html" class="md-nav__link">
 738         The Type 1 and CID drivers
 739       </a>
 740     </li>
 741
 742
 743
 744
 745
 746
 747
 748     <li class="md-nav__item">
 749       <a href="ft2-tt_driver.html" class="md-nav__link">
 750         The TrueType driver
 751       </a>
 752     </li>
 753
 754
 755
 756
 757
 758
 759
 760     <li class="md-nav__item">
 761       <a href="ft2-pcf_driver.html" class="md-nav__link">
 762         The PCF driver
 763       </a>
 764     </li>
 765
 766
 767
 768
 769
 770
 771
 772     <li class="md-nav__item">
 773       <a href="ft2-ot_svg_driver.html" class="md-nav__link">
 774         The SVG driver
 775       </a>
 776     </li>
 777
 778
 779
 780
 781
 782
 783
 784     <li class="md-nav__item">
 785       <a href="ft2-properties.html" class="md-nav__link">
 786         Driver properties
 787       </a>
 788     </li>
 789
 790
 791
 792
 793
 794
 795
 796     <li class="md-nav__item">
 797       <a href="ft2-parameter_tags.html" class="md-nav__link">
 798         Parameter Tags
 799       </a>
 800     </li>
 801
 802
 803
 804
 805
 806
 807
 808     <li class="md-nav__item">
 809       <a href="ft2-lcd_rendering.html" class="md-nav__link">
 810         Subpixel Rendering
 811       </a>
 812     </li>
 813
 814
 815
 816         </ul>
 817       </nav>
 818     </li>
 819
 820
 821
 822
 823
 824
 825
 826
 827
 828
 829
 830     <li class="md-nav__item md-nav__item--nested">
 831
 832
 833         <input class="md-nav__toggle md-toggle" data-md-toggle="__nav_8" type="checkbox" id="__nav_8" >
 834
 835       <label class="md-nav__link" for="__nav_8">
 836         Cache Sub-System
 837         <span class="md-nav__icon md-icon"></span>
 838       </label>
 839       <nav class="md-nav" aria-label="Cache Sub-System" data-md-level="1">
 840         <label class="md-nav__title" for="__nav_8">
 841           <span class="md-nav__icon md-icon"></span>
 842           Cache Sub-System
 843         </label>
 844         <ul class="md-nav__list" data-md-scrollfix>
 845
 846
 847
 848
 849
 850     <li class="md-nav__item">
 851       <a href="ft2-cache_subsystem.html" class="md-nav__link">
 852         Cache Sub-System
 853       </a>
 854     </li>
 855
 856
 857
 858         </ul>
 859       </nav>
 860     </li>
 861
 862
 863
 864
 865
 866
 867
 868
 869
 870
 871
 872
 873
 874     <li class="md-nav__item md-nav__item--active md-nav__item--nested">
 875
 876
 877         <input class="md-nav__toggle md-toggle" data-md-toggle="__nav_9" type="checkbox" id="__nav_9" checked>
 878
 879       <label class="md-nav__link" for="__nav_9">
 880         Support API
 881         <span class="md-nav__icon md-icon"></span>
 882       </label>
 883       <nav class="md-nav" aria-label="Support API" data-md-level="1">
 884         <label class="md-nav__title" for="__nav_9">
 885           <span class="md-nav__icon md-icon"></span>
 886           Support API
 887         </label>
 888         <ul class="md-nav__list" data-md-scrollfix>
 889
 890
 891
 892
 893
 894     <li class="md-nav__item">
 895       <a href="ft2-computations.html" class="md-nav__link">
 896         Computations
 897       </a>
 898     </li>
 899
 900
 901
 902
 903
 904
 905
 906     <li class="md-nav__item">
 907       <a href="ft2-list_processing.html" class="md-nav__link">
 908         List Processing
 909       </a>
 910     </li>
 911
 912
 913
 914
 915
 916
 917
 918
 919
 920     <li class="md-nav__item md-nav__item--active">
 921
 922       <input class="md-nav__toggle md-toggle" data-md-toggle="toc" type="checkbox" id="__toc">
 923
 924
 925
 926
 927
 928         <label class="md-nav__link md-nav__link--active" for="__toc">
 929           Outline Processing
 930           <span class="md-nav__icon md-icon"></span>
 931         </label>
 932
 933       <a href="ft2-outline_processing.html" class="md-nav__link md-nav__link--active">
 934         Outline Processing
 935       </a>
 936
 937
 938 <nav class="md-nav md-nav--secondary" aria-label="Table of contents">
 939
 940
 941
 942
 943
 944
 945     <label class="md-nav__title" for="__toc">
 946       <span class="md-nav__icon md-icon"></span>
 947       Table of contents
 948     </label>
 949     <ul class="md-nav__list" data-md-component="toc" data-md-scrollfix>
 950
 951         <li class="md-nav__item">
 952   <a href="#synopsis" class="md-nav__link">
 953     Synopsis
 954   </a>
 955
 956 </li>
 957
 958         <li class="md-nav__item">
 959   <a href="#ft_outline" class="md-nav__link">
 960     FT_Outline
 961   </a>
 962
 963 </li>
 964
 965         <li class="md-nav__item">
 966   <a href="#ft_outline_new" class="md-nav__link">
 967     FT_Outline_New
 968   </a>
 969
 970 </li>
 971
 972         <li class="md-nav__item">
 973   <a href="#ft_outline_done" class="md-nav__link">
 974     FT_Outline_Done
 975   </a>
 976
 977 </li>
 978
 979         <li class="md-nav__item">
 980   <a href="#ft_outline_copy" class="md-nav__link">
 981     FT_Outline_Copy
 982   </a>
 983
 984 </li>
 985
 986         <li class="md-nav__item">
 987   <a href="#ft_outline_translate" class="md-nav__link">
 988     FT_Outline_Translate
 989   </a>
 990
 991 </li>
 992
 993         <li class="md-nav__item">
 994   <a href="#ft_outline_transform" class="md-nav__link">
 995     FT_Outline_Transform
 996   </a>
 997
 998 </li>
 999
1000         <li class="md-nav__item">
1001   <a href="#ft_outline_embolden" class="md-nav__link">
1002     FT_Outline_Embolden
1003   </a>
1004
1005 </li>
1006
1007         <li class="md-nav__item">
1008   <a href="#ft_outline_emboldenxy" class="md-nav__link">
1009     FT_Outline_EmboldenXY
1010   </a>
1011
1012 </li>
1013
1014         <li class="md-nav__item">
1015   <a href="#ft_outline_reverse" class="md-nav__link">
1016     FT_Outline_Reverse
1017   </a>
1018
1019 </li>
1020
1021         <li class="md-nav__item">
1022   <a href="#ft_outline_check" class="md-nav__link">
1023     FT_Outline_Check
1024   </a>
1025
1026 </li>
1027
1028         <li class="md-nav__item">
1029   <a href="#ft_outline_get_cbox" class="md-nav__link">
1030     FT_Outline_Get_CBox
1031   </a>
1032
1033 </li>
1034
1035         <li class="md-nav__item">
1036   <a href="#ft_outline_get_bbox" class="md-nav__link">
1037     FT_Outline_Get_BBox
1038   </a>
1039
1040 </li>
1041
1042         <li class="md-nav__item">
1043   <a href="#ft_outline_get_bitmap" class="md-nav__link">
1044     FT_Outline_Get_Bitmap
1045   </a>
1046
1047 </li>
1048
1049         <li class="md-nav__item">
1050   <a href="#ft_outline_render" class="md-nav__link">
1051     FT_Outline_Render
1052   </a>
1053
1054 </li>
1055
1056         <li class="md-nav__item">
1057   <a href="#ft_outline_decompose" class="md-nav__link">
1058     FT_Outline_Decompose
1059   </a>
1060
1061 </li>
1062
1063         <li class="md-nav__item">
1064   <a href="#ft_outline_funcs" class="md-nav__link">
1065     FT_Outline_Funcs
1066   </a>
1067
1068 </li>
1069
1070         <li class="md-nav__item">
1071   <a href="#ft_outline_movetofunc" class="md-nav__link">
1072     FT_Outline_MoveToFunc
1073   </a>
1074
1075 </li>
1076
1077         <li class="md-nav__item">
1078   <a href="#ft_outline_linetofunc" class="md-nav__link">
1079     FT_Outline_LineToFunc
1080   </a>
1081
1082 </li>
1083
1084         <li class="md-nav__item">
1085   <a href="#ft_outline_conictofunc" class="md-nav__link">
1086     FT_Outline_ConicToFunc
1087   </a>
1088
1089 </li>
1090
1091         <li class="md-nav__item">
1092   <a href="#ft_outline_cubictofunc" class="md-nav__link">
1093     FT_Outline_CubicToFunc
1094   </a>
1095
1096 </li>
1097
1098         <li class="md-nav__item">
1099   <a href="#ft_orientation" class="md-nav__link">
1100     FT_Orientation
1101   </a>
1102
1103 </li>
1104
1105         <li class="md-nav__item">
1106   <a href="#ft_outline_get_orientation" class="md-nav__link">
1107     FT_Outline_Get_Orientation
1108   </a>
1109
1110 </li>
1111
1112         <li class="md-nav__item">
1113   <a href="#ft_outline_xxx" class="md-nav__link">
1114     FT_OUTLINE_XXX
1115   </a>
1116
1117 </li>
1118
1119     </ul>
1120
1121 </nav>
1122
1123     </li>
1124
1125
1126
1127
1128
1129
1130
1131     <li class="md-nav__item">
1132       <a href="ft2-quick_advance.html" class="md-nav__link">
1133         Quick retrieval of advance values
1134       </a>
1135     </li>
1136
1137
1138
1139
1140
1141
1142
1143     <li class="md-nav__item">
1144       <a href="ft2-bitmap_handling.html" class="md-nav__link">
1145         Bitmap Handling
1146       </a>
1147     </li>
1148
1149
1150
1151
1152
1153
1154
1155     <li class="md-nav__item">
1156       <a href="ft2-raster.html" class="md-nav__link">
1157         Scanline Converter
1158       </a>
1159     </li>
1160
1161
1162
1163
1164
1165
1166
1167     <li class="md-nav__item">
1168       <a href="ft2-glyph_stroker.html" class="md-nav__link">
1169         Glyph Stroker
1170       </a>
1171     </li>
1172
1173
1174
1175
1176
1177
1178
1179     <li class="md-nav__item">
1180       <a href="ft2-system_interface.html" class="md-nav__link">
1181         System Interface
1182       </a>
1183     </li>
1184
1185
1186
1187
1188
1189
1190
1191     <li class="md-nav__item">
1192       <a href="ft2-module_management.html" class="md-nav__link">
1193         Module Management
1194       </a>
1195     </li>
1196
1197
1198
1199
1200
1201
1202
1203     <li class="md-nav__item">
1204       <a href="ft2-gzip.html" class="md-nav__link">
1205         GZIP Streams
1206       </a>
1207     </li>
1208
1209
1210
1211
1212
1213
1214
1215     <li class="md-nav__item">
1216       <a href="ft2-lzw.html" class="md-nav__link">
1217         LZW Streams
1218       </a>
1219     </li>
1220
1221
1222
1223
1224
1225
1226
1227     <li class="md-nav__item">
1228       <a href="ft2-bzip2.html" class="md-nav__link">
1229         BZIP2 Streams
1230       </a>
1231     </li>
1232
1233
1234
1235
1236
1237
1238
1239     <li class="md-nav__item">
1240       <a href="ft2-debugging_apis.html" class="md-nav__link">
1241         External Debugging APIs
1242       </a>
1243     </li>
1244
1245
1246
1247         </ul>
1248       </nav>
1249     </li>
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261     <li class="md-nav__item md-nav__item--nested">
1262
1263
1264         <input class="md-nav__toggle md-toggle" data-md-toggle="__nav_10" type="checkbox" id="__nav_10" >
1265
1266       <label class="md-nav__link" for="__nav_10">
1267         Error Codes
1268         <span class="md-nav__icon md-icon"></span>
1269       </label>
1270       <nav class="md-nav" aria-label="Error Codes" data-md-level="1">
1271         <label class="md-nav__title" for="__nav_10">
1272           <span class="md-nav__icon md-icon"></span>
1273           Error Codes
1274         </label>
1275         <ul class="md-nav__list" data-md-scrollfix>
1276
1277
1278
1279
1280
1281     <li class="md-nav__item">
1282       <a href="ft2-error_enumerations.html" class="md-nav__link">
1283         Error Enumerations
1284       </a>
1285     </li>
1286
1287
1288
1289
1290
1291
1292
1293     <li class="md-nav__item">
1294       <a href="ft2-error_code_values.html" class="md-nav__link">
1295         Error Code Values
1296       </a>
1297     </li>
1298
1299
1300
1301         </ul>
1302       </nav>
1303     </li>
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315     <li class="md-nav__item md-nav__item--nested">
1316
1317
1318         <input class="md-nav__toggle md-toggle" data-md-toggle="__nav_11" type="checkbox" id="__nav_11" >
1319
1320       <label class="md-nav__link" for="__nav_11">
1321         Miscellaneous
1322         <span class="md-nav__icon md-icon"></span>
1323       </label>
1324       <nav class="md-nav" aria-label="Miscellaneous" data-md-level="1">
1325         <label class="md-nav__title" for="__nav_11">
1326           <span class="md-nav__icon md-icon"></span>
1327           Miscellaneous
1328         </label>
1329         <ul class="md-nav__list" data-md-scrollfix>
1330
1331
1332
1333
1334
1335     <li class="md-nav__item">
1336       <a href="ft2-gx_validation.html" class="md-nav__link">
1337         TrueTypeGX/AAT Validation
1338       </a>
1339     </li>
1340
1341
1342
1343
1344
1345
1346
1347     <li class="md-nav__item">
1348       <a href="ft2-incremental.html" class="md-nav__link">
1349         Incremental Loading
1350       </a>
1351     </li>
1352
1353
1354
1355
1356
1357
1358
1359     <li class="md-nav__item">
1360       <a href="ft2-truetype_engine.html" class="md-nav__link">
1361         The TrueType Engine
1362       </a>
1363     </li>
1364
1365
1366
1367
1368
1369
1370
1371     <li class="md-nav__item">
1372       <a href="ft2-ot_validation.html" class="md-nav__link">
1373         OpenType Validation
1374       </a>
1375     </li>
1376
1377
1378
1379         </ul>
1380       </nav>
1381     </li>
1382
1383
1384
1385   </ul>
1386 </nav>
1387                   </div>
1388                 </div>
1389               </div>
1390
1391
1392
1393               <div class="md-sidebar md-sidebar--secondary" data-md-component="sidebar" data-md-type="toc" >
1394                 <div class="md-sidebar__scrollwrap">
1395                   <div class="md-sidebar__inner">
1396
1397 <nav class="md-nav md-nav--secondary" aria-label="Table of contents">
1398
1399
1400
1401
1402
1403
1404     <label class="md-nav__title" for="__toc">
1405       <span class="md-nav__icon md-icon"></span>
1406       Table of contents
1407     </label>
1408     <ul class="md-nav__list" data-md-component="toc" data-md-scrollfix>
1409
1410         <li class="md-nav__item">
1411   <a href="#synopsis" class="md-nav__link">
1412     Synopsis
1413   </a>
1414
1415 </li>
1416
1417         <li class="md-nav__item">
1418   <a href="#ft_outline" class="md-nav__link">
1419     FT_Outline
1420   </a>
1421
1422 </li>
1423
1424         <li class="md-nav__item">
1425   <a href="#ft_outline_new" class="md-nav__link">
1426     FT_Outline_New
1427   </a>
1428
1429 </li>
1430
1431         <li class="md-nav__item">
1432   <a href="#ft_outline_done" class="md-nav__link">
1433     FT_Outline_Done
1434   </a>
1435
1436 </li>
1437
1438         <li class="md-nav__item">
1439   <a href="#ft_outline_copy" class="md-nav__link">
1440     FT_Outline_Copy
1441   </a>
1442
1443 </li>
1444
1445         <li class="md-nav__item">
1446   <a href="#ft_outline_translate" class="md-nav__link">
1447     FT_Outline_Translate
1448   </a>
1449
1450 </li>
1451
1452         <li class="md-nav__item">
1453   <a href="#ft_outline_transform" class="md-nav__link">
1454     FT_Outline_Transform
1455   </a>
1456
1457 </li>
1458
1459         <li class="md-nav__item">
1460   <a href="#ft_outline_embolden" class="md-nav__link">
1461     FT_Outline_Embolden
1462   </a>
1463
1464 </li>
1465
1466         <li class="md-nav__item">
1467   <a href="#ft_outline_emboldenxy" class="md-nav__link">
1468     FT_Outline_EmboldenXY
1469   </a>
1470
1471 </li>
1472
1473         <li class="md-nav__item">
1474   <a href="#ft_outline_reverse" class="md-nav__link">
1475     FT_Outline_Reverse
1476   </a>
1477
1478 </li>
1479
1480         <li class="md-nav__item">
1481   <a href="#ft_outline_check" class="md-nav__link">
1482     FT_Outline_Check
1483   </a>
1484
1485 </li>
1486
1487         <li class="md-nav__item">
1488   <a href="#ft_outline_get_cbox" class="md-nav__link">
1489     FT_Outline_Get_CBox
1490   </a>
1491
1492 </li>
1493
1494         <li class="md-nav__item">
1495   <a href="#ft_outline_get_bbox" class="md-nav__link">
1496     FT_Outline_Get_BBox
1497   </a>
1498
1499 </li>
1500
1501         <li class="md-nav__item">
1502   <a href="#ft_outline_get_bitmap" class="md-nav__link">
1503     FT_Outline_Get_Bitmap
1504   </a>
1505
1506 </li>
1507
1508         <li class="md-nav__item">
1509   <a href="#ft_outline_render" class="md-nav__link">
1510     FT_Outline_Render
1511   </a>
1512
1513 </li>
1514
1515         <li class="md-nav__item">
1516   <a href="#ft_outline_decompose" class="md-nav__link">
1517     FT_Outline_Decompose
1518   </a>
1519
1520 </li>
1521
1522         <li class="md-nav__item">
1523   <a href="#ft_outline_funcs" class="md-nav__link">
1524     FT_Outline_Funcs
1525   </a>
1526
1527 </li>
1528
1529         <li class="md-nav__item">
1530   <a href="#ft_outline_movetofunc" class="md-nav__link">
1531     FT_Outline_MoveToFunc
1532   </a>
1533
1534 </li>
1535
1536         <li class="md-nav__item">
1537   <a href="#ft_outline_linetofunc" class="md-nav__link">
1538     FT_Outline_LineToFunc
1539   </a>
1540
1541 </li>
1542
1543         <li class="md-nav__item">
1544   <a href="#ft_outline_conictofunc" class="md-nav__link">
1545     FT_Outline_ConicToFunc
1546   </a>
1547
1548 </li>
1549
1550         <li class="md-nav__item">
1551   <a href="#ft_outline_cubictofunc" class="md-nav__link">
1552     FT_Outline_CubicToFunc
1553   </a>
1554
1555 </li>
1556
1557         <li class="md-nav__item">
1558   <a href="#ft_orientation" class="md-nav__link">
1559     FT_Orientation
1560   </a>
1561
1562 </li>
1563
1564         <li class="md-nav__item">
1565   <a href="#ft_outline_get_orientation" class="md-nav__link">
1566     FT_Outline_Get_Orientation
1567   </a>
1568
1569 </li>
1570
1571         <li class="md-nav__item">
1572   <a href="#ft_outline_xxx" class="md-nav__link">
1573     FT_OUTLINE_XXX
1574   </a>
1575
1576 </li>
1577
1578     </ul>
1579
1580 </nav>
1581                   </div>
1582                 </div>
1583               </div>
1584
1585
1586           <div class="md-content" data-md-component="content">
1587             <article class="md-content__inner md-typeset">
1588
1589
1590
1591                 <p><a href="https://www.freetype.org">FreeType</a> &raquo; <a href="../">Docs</a> &raquo; <a href="index.html#support-api">Support API</a> &raquo; Outline Processing</p>
1592 <hr />
1593 <h1 id="outline-processing">Outline Processing<a class="headerlink" href="#outline-processing" title="Permanent link">&para;</a></h1>
1594 <h2 id="synopsis">Synopsis<a class="headerlink" href="#synopsis" title="Permanent link">&para;</a></h2>
1595 <p>This section contains routines used to create and destroy scalable glyph images known as &lsquo;outlines&rsquo;. These can also be measured, transformed, and converted into bitmaps and pixmaps.</p>
1596 <h2 id="ft_outline">FT_Outline<a class="headerlink" href="#ft_outline" title="Permanent link">&para;</a></h2>
1597 <p>Defined in FT_IMAGE_H (freetype/ftimage.h).</p>
1598 <div class = "codehilite"><pre><code>  <span class="keyword">typedef</span> <span class="keyword">struct</span>  FT_Outline_
1599   {
1600     <span class="keyword">short</span>       n_contours;      /* number of contours in glyph        */
1601     <span class="keyword">short</span>       n_points;        /* number of points in the glyph      */
1602
1603     <a href="ft2-basic_types.html#ft_vector">FT_Vector</a>*  points;          /* the outline's points               */
1604     <span class="keyword">char</span>*       tags;            /* the points flags                   */
1605     <span class="keyword">short</span>*      contours;        /* the contour end points             */
1606
1607     <span class="keyword">int</span>         flags;           /* outline masks                      */
1608
1609   } <b>FT_Outline</b>;
1610 </code></pre></div>
1611
1612 <p>This structure is used to describe an outline to the scan-line converter.</p>
1613 <h4>fields</h4>
1614 <table class="fields">
1615 <tr><td class="val" id="n_contours">n_contours</td><td class="desc">
1616 <p>The number of contours in the outline.</p>
1617 </td></tr>
1618 <tr><td class="val" id="n_points">n_points</td><td class="desc">
1619 <p>The number of points in the outline.</p>
1620 </td></tr>
1621 <tr><td class="val" id="points">points</td><td class="desc">
1622 <p>A pointer to an array of <code>n_points</code> <code><a href="ft2-basic_types.html#ft_vector">FT_Vector</a></code> elements, giving the outline's point coordinates.</p>
1623 </td></tr>
1624 <tr><td class="val" id="tags">tags</td><td class="desc">
1625 <p>A pointer to an array of <code>n_points</code> chars, giving each outline point's type.</p>
1626 <p>If bit&nbsp;0 is unset, the point is &lsquo;off&rsquo; the curve, i.e., a Bezier control point, while it is &lsquo;on&rsquo; if set.</p>
1627 <p>Bit&nbsp;1 is meaningful for &lsquo;off&rsquo; points only. If set, it indicates a third-order Bezier arc control point; and a second-order control point if unset.</p>
1628 <p>If bit&nbsp;2 is set, bits 5-7 contain the drop-out mode (as defined in the OpenType specification; the value is the same as the argument to the &lsquo;SCANMODE&rsquo; instruction).</p>
1629 <p>Bits 3 and&nbsp;4 are reserved for internal purposes.</p>
1630 </td></tr>
1631 <tr><td class="val" id="contours">contours</td><td class="desc">
1632 <p>An array of <code>n_contours</code> shorts, giving the end point of each contour within the outline. For example, the first contour is defined by the points &lsquo;0&rsquo; to <code>contours[0]</code>, the second one is defined by the points <code>contours[0]+1</code> to <code>contours[1]</code>, etc.</p>
1633 </td></tr>
1634 <tr><td class="val" id="flags">flags</td><td class="desc">
1635 <p>A set of bit flags used to characterize the outline and give hints to the scan-converter and hinter on how to convert/grid-fit it. See <code><a href="ft2-outline_processing.html#ft_outline_xxx">FT_OUTLINE_XXX</a></code>.</p>
1636 </td></tr>
1637 </table>
1638
1639 <h4>note</h4>
1640
1641 <p>The B/W rasterizer only checks bit&nbsp;2 in the <code>tags</code> array for the first point of each contour. The drop-out mode as given with <code><a href="ft2-outline_processing.html#ft_outline_xxx">FT_OUTLINE_IGNORE_DROPOUTS</a></code>, <code><a href="ft2-outline_processing.html#ft_outline_xxx">FT_OUTLINE_SMART_DROPOUTS</a></code>, and <code><a href="ft2-outline_processing.html#ft_outline_xxx">FT_OUTLINE_INCLUDE_STUBS</a></code> in <code>flags</code> is then overridden.</p>
1642 <hr>
1643
1644 <h2 id="ft_outline_new">FT_Outline_New<a class="headerlink" href="#ft_outline_new" title="Permanent link">&para;</a></h2>
1645 <p>Defined in FT_OUTLINE_H (freetype/ftoutln.h).</p>
1646 <div class = "codehilite"><pre><code>  FT_EXPORT( <a href="ft2-basic_types.html#ft_error">FT_Error</a> )
1647   <b>FT_Outline_New</b>( <a href="ft2-library_setup.html#ft_library">FT_Library</a>   library,
1648                   <a href="ft2-basic_types.html#ft_uint">FT_UInt</a>      numPoints,
1649                   <a href="ft2-basic_types.html#ft_int">FT_Int</a>       numContours,
1650                   <a href="ft2-outline_processing.html#ft_outline">FT_Outline</a>  *anoutline );
1651 </code></pre></div>
1652
1653 <p>Create a new outline of a given size.</p>
1654 <h4>input</h4>
1655 <table class="fields">
1656 <tr><td class="val" id="library">library</td><td class="desc">
1657 <p>A handle to the library object from where the outline is allocated. Note however that the new outline will <strong>not</strong> necessarily be <strong>freed</strong>, when destroying the library, by <code><a href="ft2-library_setup.html#ft_done_freetype">FT_Done_FreeType</a></code>.</p>
1658 </td></tr>
1659 <tr><td class="val" id="numpoints">numPoints</td><td class="desc">
1660 <p>The maximum number of points within the outline. Must be smaller than or equal to 0xFFFF (65535).</p>
1661 </td></tr>
1662 <tr><td class="val" id="numcontours">numContours</td><td class="desc">
1663 <p>The maximum number of contours within the outline. This value must be in the range 0 to <code>numPoints</code>.</p>
1664 </td></tr>
1665 </table>
1666
1667 <h4>output</h4>
1668 <table class="fields">
1669 <tr><td class="val" id="anoutline">anoutline</td><td class="desc">
1670 <p>A handle to the new outline.</p>
1671 </td></tr>
1672 </table>
1673
1674 <h4>return</h4>
1675
1676 <p>FreeType error code. 0&nbsp;means success.</p>
1677 <h4>note</h4>
1678
1679 <p>The reason why this function takes a <code>library</code> parameter is simply to use the library's memory allocator.</p>
1680 <hr>
1681
1682 <h2 id="ft_outline_done">FT_Outline_Done<a class="headerlink" href="#ft_outline_done" title="Permanent link">&para;</a></h2>
1683 <p>Defined in FT_OUTLINE_H (freetype/ftoutln.h).</p>
1684 <div class = "codehilite"><pre><code>  FT_EXPORT( <a href="ft2-basic_types.html#ft_error">FT_Error</a> )
1685   <b>FT_Outline_Done</b>( <a href="ft2-library_setup.html#ft_library">FT_Library</a>   library,
1686                    <a href="ft2-outline_processing.html#ft_outline">FT_Outline</a>*  outline );
1687 </code></pre></div>
1688
1689 <p>Destroy an outline created with <code><a href="ft2-outline_processing.html#ft_outline_new">FT_Outline_New</a></code>.</p>
1690 <h4>input</h4>
1691 <table class="fields">
1692 <tr><td class="val" id="library">library</td><td class="desc">
1693 <p>A handle of the library object used to allocate the outline.</p>
1694 </td></tr>
1695 <tr><td class="val" id="outline">outline</td><td class="desc">
1696 <p>A pointer to the outline object to be discarded.</p>
1697 </td></tr>
1698 </table>
1699
1700 <h4>return</h4>
1701
1702 <p>FreeType error code. 0&nbsp;means success.</p>
1703 <h4>note</h4>
1704
1705 <p>If the outline's &lsquo;owner&rsquo; field is not set, only the outline descriptor will be released.</p>
1706 <hr>
1707
1708 <h2 id="ft_outline_copy">FT_Outline_Copy<a class="headerlink" href="#ft_outline_copy" title="Permanent link">&para;</a></h2>
1709 <p>Defined in FT_OUTLINE_H (freetype/ftoutln.h).</p>
1710 <div class = "codehilite"><pre><code>  FT_EXPORT( <a href="ft2-basic_types.html#ft_error">FT_Error</a> )
1711   <b>FT_Outline_Copy</b>( <span class="keyword">const</span> <a href="ft2-outline_processing.html#ft_outline">FT_Outline</a>*  source,
1712                    <a href="ft2-outline_processing.html#ft_outline">FT_Outline</a>        *target );
1713 </code></pre></div>
1714
1715 <p>Copy an outline into another one. Both objects must have the same sizes (number of points &amp; number of contours) when this function is called.</p>
1716 <h4>input</h4>
1717 <table class="fields">
1718 <tr><td class="val" id="source">source</td><td class="desc">
1719 <p>A handle to the source outline.</p>
1720 </td></tr>
1721 </table>
1722
1723 <h4>output</h4>
1724 <table class="fields">
1725 <tr><td class="val" id="target">target</td><td class="desc">
1726 <p>A handle to the target outline.</p>
1727 </td></tr>
1728 </table>
1729
1730 <h4>return</h4>
1731
1732 <p>FreeType error code. 0&nbsp;means success.</p>
1733 <hr>
1734
1735 <h2 id="ft_outline_translate">FT_Outline_Translate<a class="headerlink" href="#ft_outline_translate" title="Permanent link">&para;</a></h2>
1736 <p>Defined in FT_OUTLINE_H (freetype/ftoutln.h).</p>
1737 <div class = "codehilite"><pre><code>  FT_EXPORT( <span class="keyword">void</span> )
1738   <b>FT_Outline_Translate</b>( <span class="keyword">const</span> <a href="ft2-outline_processing.html#ft_outline">FT_Outline</a>*  outline,
1739                         <a href="ft2-basic_types.html#ft_pos">FT_Pos</a>             xOffset,
1740                         <a href="ft2-basic_types.html#ft_pos">FT_Pos</a>             yOffset );
1741 </code></pre></div>
1742
1743 <p>Apply a simple translation to the points of an outline.</p>
1744 <h4>inout</h4>
1745 <table class="fields">
1746 <tr><td class="val" id="outline">outline</td><td class="desc">
1747 <p>A pointer to the target outline descriptor.</p>
1748 </td></tr>
1749 </table>
1750
1751 <h4>input</h4>
1752 <table class="fields">
1753 <tr><td class="val" id="xoffset">xOffset</td><td class="desc">
1754 <p>The horizontal offset.</p>
1755 </td></tr>
1756 <tr><td class="val" id="yoffset">yOffset</td><td class="desc">
1757 <p>The vertical offset.</p>
1758 </td></tr>
1759 </table>
1760
1761 <hr>
1762
1763 <h2 id="ft_outline_transform">FT_Outline_Transform<a class="headerlink" href="#ft_outline_transform" title="Permanent link">&para;</a></h2>
1764 <p>Defined in FT_OUTLINE_H (freetype/ftoutln.h).</p>
1765 <div class = "codehilite"><pre><code>  FT_EXPORT( <span class="keyword">void</span> )
1766   <b>FT_Outline_Transform</b>( <span class="keyword">const</span> <a href="ft2-outline_processing.html#ft_outline">FT_Outline</a>*  outline,
1767                         <span class="keyword">const</span> <a href="ft2-basic_types.html#ft_matrix">FT_Matrix</a>*   matrix );
1768 </code></pre></div>
1769
1770 <p>Apply a simple 2x2 matrix to all of an outline's points. Useful for applying rotations, slanting, flipping, etc.</p>
1771 <h4>inout</h4>
1772 <table class="fields">
1773 <tr><td class="val" id="outline">outline</td><td class="desc">
1774 <p>A pointer to the target outline descriptor.</p>
1775 </td></tr>
1776 </table>
1777
1778 <h4>input</h4>
1779 <table class="fields">
1780 <tr><td class="val" id="matrix">matrix</td><td class="desc">
1781 <p>A pointer to the transformation matrix.</p>
1782 </td></tr>
1783 </table>
1784
1785 <h4>note</h4>
1786
1787 <p>You can use <code><a href="ft2-outline_processing.html#ft_outline_translate">FT_Outline_Translate</a></code> if you need to translate the outline's points.</p>
1788 <hr>
1789
1790 <h2 id="ft_outline_embolden">FT_Outline_Embolden<a class="headerlink" href="#ft_outline_embolden" title="Permanent link">&para;</a></h2>
1791 <p>Defined in FT_OUTLINE_H (freetype/ftoutln.h).</p>
1792 <div class = "codehilite"><pre><code>  FT_EXPORT( <a href="ft2-basic_types.html#ft_error">FT_Error</a> )
1793   <b>FT_Outline_Embolden</b>( <a href="ft2-outline_processing.html#ft_outline">FT_Outline</a>*  outline,
1794                        <a href="ft2-basic_types.html#ft_pos">FT_Pos</a>       strength );
1795 </code></pre></div>
1796
1797 <p>Embolden an outline. The new outline will be at most 4&nbsp;times <code>strength</code> pixels wider and higher. You may think of the left and bottom borders as unchanged.</p>
1798 <p>Negative <code>strength</code> values to reduce the outline thickness are possible also.</p>
1799 <h4>inout</h4>
1800 <table class="fields">
1801 <tr><td class="val" id="outline">outline</td><td class="desc">
1802 <p>A handle to the target outline.</p>
1803 </td></tr>
1804 </table>
1805
1806 <h4>input</h4>
1807 <table class="fields">
1808 <tr><td class="val" id="strength">strength</td><td class="desc">
1809 <p>How strong the glyph is emboldened. Expressed in 26.6 pixel format.</p>
1810 </td></tr>
1811 </table>
1812
1813 <h4>return</h4>
1814
1815 <p>FreeType error code. 0&nbsp;means success.</p>
1816 <h4>note</h4>
1817
1818 <p>The used algorithm to increase or decrease the thickness of the glyph doesn't change the number of points; this means that certain situations like acute angles or intersections are sometimes handled incorrectly.</p>
1819 <p>If you need &lsquo;better&rsquo; metrics values you should call <code><a href="ft2-outline_processing.html#ft_outline_get_cbox">FT_Outline_Get_CBox</a></code> or <code><a href="ft2-outline_processing.html#ft_outline_get_bbox">FT_Outline_Get_BBox</a></code>.</p>
1820 <p>To get meaningful results, font scaling values must be set with functions like <code><a href="ft2-sizing_and_scaling.html#ft_set_char_size">FT_Set_Char_Size</a></code> before calling FT_Render_Glyph.</p>
1821 <h4>example</h4>
1822 <div class="highlight"><pre><span></span><code>  FT_Load_Glyph( face, index, FT_LOAD_DEFAULT );
1823
1824   if ( face-&gt;glyph-&gt;format == FT_GLYPH_FORMAT_OUTLINE )
1825     FT_Outline_Embolden( &amp;face-&gt;glyph-&gt;outline, strength );
1826 </code></pre></div>
1827 <hr>
1828
1829 <h2 id="ft_outline_emboldenxy">FT_Outline_EmboldenXY<a class="headerlink" href="#ft_outline_emboldenxy" title="Permanent link">&para;</a></h2>
1830 <p>Defined in FT_OUTLINE_H (freetype/ftoutln.h).</p>
1831 <div class = "codehilite"><pre><code>  FT_EXPORT( <a href="ft2-basic_types.html#ft_error">FT_Error</a> )
1832   <b>FT_Outline_EmboldenXY</b>( <a href="ft2-outline_processing.html#ft_outline">FT_Outline</a>*  outline,
1833                          <a href="ft2-basic_types.html#ft_pos">FT_Pos</a>       xstrength,
1834                          <a href="ft2-basic_types.html#ft_pos">FT_Pos</a>       ystrength );
1835 </code></pre></div>
1836
1837 <p>Embolden an outline. The new outline will be <code>xstrength</code> pixels wider and <code>ystrength</code> pixels higher. Otherwise, it is similar to <code><a href="ft2-outline_processing.html#ft_outline_embolden">FT_Outline_Embolden</a></code>, which uses the same strength in both directions.</p>
1838 <h4>since</h4>
1839
1840 <p>2.4.10</p>
1841 <hr>
1842
1843 <h2 id="ft_outline_reverse">FT_Outline_Reverse<a class="headerlink" href="#ft_outline_reverse" title="Permanent link">&para;</a></h2>
1844 <p>Defined in FT_OUTLINE_H (freetype/ftoutln.h).</p>
1845 <div class = "codehilite"><pre><code>  FT_EXPORT( <span class="keyword">void</span> )
1846   <b>FT_Outline_Reverse</b>( <a href="ft2-outline_processing.html#ft_outline">FT_Outline</a>*  outline );
1847 </code></pre></div>
1848
1849 <p>Reverse the drawing direction of an outline. This is used to ensure consistent fill conventions for mirrored glyphs.</p>
1850 <h4>inout</h4>
1851 <table class="fields">
1852 <tr><td class="val" id="outline">outline</td><td class="desc">
1853 <p>A pointer to the target outline descriptor.</p>
1854 </td></tr>
1855 </table>
1856
1857 <h4>note</h4>
1858
1859 <p>This function toggles the bit flag <code><a href="ft2-outline_processing.html#ft_outline_xxx">FT_OUTLINE_REVERSE_FILL</a></code> in the outline's <code>flags</code> field.</p>
1860 <p>It shouldn't be used by a normal client application, unless it knows what it is doing.</p>
1861 <hr>
1862
1863 <h2 id="ft_outline_check">FT_Outline_Check<a class="headerlink" href="#ft_outline_check" title="Permanent link">&para;</a></h2>
1864 <p>Defined in FT_OUTLINE_H (freetype/ftoutln.h).</p>
1865 <div class = "codehilite"><pre><code>  FT_EXPORT( <a href="ft2-basic_types.html#ft_error">FT_Error</a> )
1866   <b>FT_Outline_Check</b>( <a href="ft2-outline_processing.html#ft_outline">FT_Outline</a>*  outline );
1867 </code></pre></div>
1868
1869 <p>Check the contents of an outline descriptor.</p>
1870 <h4>input</h4>
1871 <table class="fields">
1872 <tr><td class="val" id="outline">outline</td><td class="desc">
1873 <p>A handle to a source outline.</p>
1874 </td></tr>
1875 </table>
1876
1877 <h4>return</h4>
1878
1879 <p>FreeType error code. 0&nbsp;means success.</p>
1880 <h4>note</h4>
1881
1882 <p>An empty outline, or an outline with a single point only is also valid.</p>
1883 <hr>
1884
1885 <h2 id="ft_outline_get_cbox">FT_Outline_Get_CBox<a class="headerlink" href="#ft_outline_get_cbox" title="Permanent link">&para;</a></h2>
1886 <p>Defined in FT_OUTLINE_H (freetype/ftoutln.h).</p>
1887 <div class = "codehilite"><pre><code>  FT_EXPORT( <span class="keyword">void</span> )
1888   <b>FT_Outline_Get_CBox</b>( <span class="keyword">const</span> <a href="ft2-outline_processing.html#ft_outline">FT_Outline</a>*  outline,
1889                        <a href="ft2-basic_types.html#ft_bbox">FT_BBox</a>           *acbox );
1890 </code></pre></div>
1891
1892 <p>Return an outline's &lsquo;control box&rsquo;. The control box encloses all the outline's points, including Bezier control points. Though it coincides with the exact bounding box for most glyphs, it can be slightly larger in some situations (like when rotating an outline that contains Bezier outside arcs).</p>
1893 <p>Computing the control box is very fast, while getting the bounding box can take much more time as it needs to walk over all segments and arcs in the outline. To get the latter, you can use the &lsquo;ftbbox&rsquo; component, which is dedicated to this single task.</p>
1894 <h4>input</h4>
1895 <table class="fields">
1896 <tr><td class="val" id="outline">outline</td><td class="desc">
1897 <p>A pointer to the source outline descriptor.</p>
1898 </td></tr>
1899 </table>
1900
1901 <h4>output</h4>
1902 <table class="fields">
1903 <tr><td class="val" id="acbox">acbox</td><td class="desc">
1904 <p>The outline's control box.</p>
1905 </td></tr>
1906 </table>
1907
1908 <h4>note</h4>
1909
1910 <p>See <code><a href="ft2-glyph_management.html#ft_glyph_get_cbox">FT_Glyph_Get_CBox</a></code> for a discussion of tricky fonts.</p>
1911 <hr>
1912
1913 <h2 id="ft_outline_get_bbox">FT_Outline_Get_BBox<a class="headerlink" href="#ft_outline_get_bbox" title="Permanent link">&para;</a></h2>
1914 <p>Defined in FT_BBOX_H (freetype/ftbbox.h).</p>
1915 <div class = "codehilite"><pre><code>  FT_EXPORT( <a href="ft2-basic_types.html#ft_error">FT_Error</a> )
1916   <b>FT_Outline_Get_BBox</b>( <a href="ft2-outline_processing.html#ft_outline">FT_Outline</a>*  outline,
1917                        <a href="ft2-basic_types.html#ft_bbox">FT_BBox</a>     *abbox );
1918 </code></pre></div>
1919
1920 <p>Compute the exact bounding box of an outline. This is slower than computing the control box. However, it uses an advanced algorithm that returns <em>very</em> quickly when the two boxes coincide. Otherwise, the outline Bezier arcs are traversed to extract their extrema.</p>
1921 <h4>input</h4>
1922 <table class="fields">
1923 <tr><td class="val" id="outline">outline</td><td class="desc">
1924 <p>A pointer to the source outline.</p>
1925 </td></tr>
1926 </table>
1927
1928 <h4>output</h4>
1929 <table class="fields">
1930 <tr><td class="val" id="abbox">abbox</td><td class="desc">
1931 <p>The outline's exact bounding box.</p>
1932 </td></tr>
1933 </table>
1934
1935 <h4>return</h4>
1936
1937 <p>FreeType error code. 0&nbsp;means success.</p>
1938 <h4>note</h4>
1939
1940 <p>If the font is tricky and the glyph has been loaded with <code><a href="ft2-glyph_retrieval.html#ft_load_xxx">FT_LOAD_NO_SCALE</a></code>, the resulting BBox is meaningless. To get reasonable values for the BBox it is necessary to load the glyph at a large ppem value (so that the hinting instructions can properly shift and scale the subglyphs), then extracting the BBox, which can be eventually converted back to font units.</p>
1941 <hr>
1942
1943 <h2 id="ft_outline_get_bitmap">FT_Outline_Get_Bitmap<a class="headerlink" href="#ft_outline_get_bitmap" title="Permanent link">&para;</a></h2>
1944 <p>Defined in FT_OUTLINE_H (freetype/ftoutln.h).</p>
1945 <div class = "codehilite"><pre><code>  FT_EXPORT( <a href="ft2-basic_types.html#ft_error">FT_Error</a> )
1946   <b>FT_Outline_Get_Bitmap</b>( <a href="ft2-library_setup.html#ft_library">FT_Library</a>        library,
1947                          <a href="ft2-outline_processing.html#ft_outline">FT_Outline</a>*       outline,
1948                          <span class="keyword">const</span> <a href="ft2-basic_types.html#ft_bitmap">FT_Bitmap</a>  *abitmap );
1949 </code></pre></div>
1950
1951 <p>Render an outline within a bitmap. The outline's image is simply OR-ed to the target bitmap.</p>
1952 <h4>input</h4>
1953 <table class="fields">
1954 <tr><td class="val" id="library">library</td><td class="desc">
1955 <p>A handle to a FreeType library object.</p>
1956 </td></tr>
1957 <tr><td class="val" id="outline">outline</td><td class="desc">
1958 <p>A pointer to the source outline descriptor.</p>
1959 </td></tr>
1960 </table>
1961
1962 <h4>inout</h4>
1963 <table class="fields">
1964 <tr><td class="val" id="abitmap">abitmap</td><td class="desc">
1965 <p>A pointer to the target bitmap descriptor.</p>
1966 </td></tr>
1967 </table>
1968
1969 <h4>return</h4>
1970
1971 <p>FreeType error code. 0&nbsp;means success.</p>
1972 <h4>note</h4>
1973
1974 <p>This function does <strong>not create</strong> the bitmap, it only renders an outline image within the one you pass to it! Consequently, the various fields in <code>abitmap</code> should be set accordingly.</p>
1975 <p>It will use the raster corresponding to the default glyph format.</p>
1976 <p>The value of the <code>num_grays</code> field in <code>abitmap</code> is ignored. If you select the gray-level rasterizer, and you want less than 256 gray levels, you have to use <code><a href="ft2-outline_processing.html#ft_outline_render">FT_Outline_Render</a></code> directly.</p>
1977 <hr>
1978
1979 <h2 id="ft_outline_render">FT_Outline_Render<a class="headerlink" href="#ft_outline_render" title="Permanent link">&para;</a></h2>
1980 <p>Defined in FT_OUTLINE_H (freetype/ftoutln.h).</p>
1981 <div class = "codehilite"><pre><code>  FT_EXPORT( <a href="ft2-basic_types.html#ft_error">FT_Error</a> )
1982   <b>FT_Outline_Render</b>( <a href="ft2-library_setup.html#ft_library">FT_Library</a>         library,
1983                      <a href="ft2-outline_processing.html#ft_outline">FT_Outline</a>*        outline,
1984                      <a href="ft2-raster.html#ft_raster_params">FT_Raster_Params</a>*  params );
1985 </code></pre></div>
1986
1987 <p>Render an outline within a bitmap using the current scan-convert.</p>
1988 <h4>input</h4>
1989 <table class="fields">
1990 <tr><td class="val" id="library">library</td><td class="desc">
1991 <p>A handle to a FreeType library object.</p>
1992 </td></tr>
1993 <tr><td class="val" id="outline">outline</td><td class="desc">
1994 <p>A pointer to the source outline descriptor.</p>
1995 </td></tr>
1996 </table>
1997
1998 <h4>inout</h4>
1999 <table class="fields">
2000 <tr><td class="val" id="params">params</td><td class="desc">
2001 <p>A pointer to an <code><a href="ft2-raster.html#ft_raster_params">FT_Raster_Params</a></code> structure used to describe the rendering operation.</p>
2002 </td></tr>
2003 </table>
2004
2005 <h4>return</h4>
2006
2007 <p>FreeType error code. 0&nbsp;means success.</p>
2008 <h4>note</h4>
2009
2010 <p>This advanced function uses <code><a href="ft2-raster.html#ft_raster_params">FT_Raster_Params</a></code> as an argument. The field <code>params.source</code> will be set to <code>outline</code> before the scan converter is called, which means that the value you give to it is actually ignored. Either <code>params.target</code> must point to preallocated bitmap, or <code><a href="ft2-raster.html#ft_raster_flag_xxx">FT_RASTER_FLAG_DIRECT</a></code> must be set in <code>params.flags</code> allowing FreeType rasterizer to be used for direct composition, translucency, etc. See <code><a href="ft2-raster.html#ft_raster_params">FT_Raster_Params</a></code> for more details.</p>
2011 <hr>
2012
2013 <h2 id="ft_outline_decompose">FT_Outline_Decompose<a class="headerlink" href="#ft_outline_decompose" title="Permanent link">&para;</a></h2>
2014 <p>Defined in FT_OUTLINE_H (freetype/ftoutln.h).</p>
2015 <div class = "codehilite"><pre><code>  FT_EXPORT( <a href="ft2-basic_types.html#ft_error">FT_Error</a> )
2016   <b>FT_Outline_Decompose</b>( <a href="ft2-outline_processing.html#ft_outline">FT_Outline</a>*              outline,
2017                         <span class="keyword">const</span> <a href="ft2-outline_processing.html#ft_outline_funcs">FT_Outline_Funcs</a>*  func_interface,
2018                         <span class="keyword">void</span>*                    user );
2019 </code></pre></div>
2020
2021 <p>Walk over an outline's structure to decompose it into individual segments and Bezier arcs. This function also emits &lsquo;move to&rsquo; operations to indicate the start of new contours in the outline.</p>
2022 <h4>input</h4>
2023 <table class="fields">
2024 <tr><td class="val" id="outline">outline</td><td class="desc">
2025 <p>A pointer to the source target.</p>
2026 </td></tr>
2027 <tr><td class="val" id="func_interface">func_interface</td><td class="desc">
2028 <p>A table of &lsquo;emitters&rsquo;, i.e., function pointers called during decomposition to indicate path operations.</p>
2029 </td></tr>
2030 </table>
2031
2032 <h4>inout</h4>
2033 <table class="fields">
2034 <tr><td class="val" id="user">user</td><td class="desc">
2035 <p>A typeless pointer that is passed to each emitter during the decomposition. It can be used to store the state during the decomposition.</p>
2036 </td></tr>
2037 </table>
2038
2039 <h4>return</h4>
2040
2041 <p>FreeType error code. 0&nbsp;means success.</p>
2042 <h4>note</h4>
2043
2044 <p>Degenerate contours, segments, and Bezier arcs may be reported. In most cases, it is best to filter these out before using the outline for stroking or other path modification purposes (which may cause degenerate segments to become non-degenrate and visible, like when stroke caps are used or the path is otherwise outset). Some glyph outlines may contain deliberate degenerate single points for mark attachement.</p>
2045 <p>Similarly, the function returns success for an empty outline also (doing nothing, that is, not calling any emitter); if necessary, you should filter this out, too.</p>
2046 <hr>
2047
2048 <h2 id="ft_outline_funcs">FT_Outline_Funcs<a class="headerlink" href="#ft_outline_funcs" title="Permanent link">&para;</a></h2>
2049 <p>Defined in FT_IMAGE_H (freetype/ftimage.h).</p>
2050 <div class = "codehilite"><pre><code>  <span class="keyword">typedef</span> <span class="keyword">struct</span>  FT_Outline_Funcs_
2051   {
2052     <a href="ft2-outline_processing.html#ft_outline_movetofunc">FT_Outline_MoveToFunc</a>   move_to;
2053     <a href="ft2-outline_processing.html#ft_outline_linetofunc">FT_Outline_LineToFunc</a>   line_to;
2054     <a href="ft2-outline_processing.html#ft_outline_conictofunc">FT_Outline_ConicToFunc</a>  conic_to;
2055     <a href="ft2-outline_processing.html#ft_outline_cubictofunc">FT_Outline_CubicToFunc</a>  cubic_to;
2056
2057     <span class="keyword">int</span>                     shift;
2058     <a href="ft2-basic_types.html#ft_pos">FT_Pos</a>                  delta;
2059
2060   } <b>FT_Outline_Funcs</b>;
2061 </code></pre></div>
2062
2063 <p>A structure to hold various function pointers used during outline decomposition in order to emit segments, conic, and cubic Beziers.</p>
2064 <h4>fields</h4>
2065 <table class="fields">
2066 <tr><td class="val" id="move_to">move_to</td><td class="desc">
2067 <p>The &lsquo;move to&rsquo; emitter.</p>
2068 </td></tr>
2069 <tr><td class="val" id="line_to">line_to</td><td class="desc">
2070 <p>The segment emitter.</p>
2071 </td></tr>
2072 <tr><td class="val" id="conic_to">conic_to</td><td class="desc">
2073 <p>The second-order Bezier arc emitter.</p>
2074 </td></tr>
2075 <tr><td class="val" id="cubic_to">cubic_to</td><td class="desc">
2076 <p>The third-order Bezier arc emitter.</p>
2077 </td></tr>
2078 <tr><td class="val" id="shift">shift</td><td class="desc">
2079 <p>The shift that is applied to coordinates before they are sent to the emitter.</p>
2080 </td></tr>
2081 <tr><td class="val" id="delta">delta</td><td class="desc">
2082 <p>The delta that is applied to coordinates before they are sent to the emitter, but after the shift.</p>
2083 </td></tr>
2084 </table>
2085
2086 <h4>note</h4>
2087
2088 <p>The point coordinates sent to the emitters are the transformed version of the original coordinates (this is important for high accuracy during scan-conversion). The transformation is simple:
2089 <div class="highlight"><pre><span></span><code>  x&#39; = (x &lt;&lt; shift) - delta
2090   y&#39; = (y &lt;&lt; shift) - delta
2091 </code></pre></div></p>
2092 <p>Set the values of <code>shift</code> and <code>delta</code> to&nbsp;0 to get the original point coordinates.</p>
2093 <hr>
2094
2095 <h2 id="ft_outline_movetofunc">FT_Outline_MoveToFunc<a class="headerlink" href="#ft_outline_movetofunc" title="Permanent link">&para;</a></h2>
2096 <p>Defined in FT_IMAGE_H (freetype/ftimage.h).</p>
2097 <div class = "codehilite"><pre><code>  <span class="keyword">typedef</span> <span class="keyword">int</span>
2098   (*<b>FT_Outline_MoveToFunc</b>)( <span class="keyword">const</span> <a href="ft2-basic_types.html#ft_vector">FT_Vector</a>*  to,
2099                             <span class="keyword">void</span>*             user );
2100
2101 #<span class="keyword">define</span> FT_Outline_MoveTo_Func  <b>FT_Outline_MoveToFunc</b>
2102 </code></pre></div>
2103
2104 <p>A function pointer type used to describe the signature of a &lsquo;move to&rsquo; function during outline walking/decomposition.</p>
2105 <p>A &lsquo;move to&rsquo; is emitted to start a new contour in an outline.</p>
2106 <h4>input</h4>
2107 <table class="fields">
2108 <tr><td class="val" id="to">to</td><td class="desc">
2109 <p>A pointer to the target point of the &lsquo;move to&rsquo;.</p>
2110 </td></tr>
2111 <tr><td class="val" id="user">user</td><td class="desc">
2112 <p>A typeless pointer, which is passed from the caller of the decomposition function.</p>
2113 </td></tr>
2114 </table>
2115
2116 <h4>return</h4>
2117
2118 <p>Error code. 0&nbsp;means success.</p>
2119 <hr>
2120
2121 <h2 id="ft_outline_linetofunc">FT_Outline_LineToFunc<a class="headerlink" href="#ft_outline_linetofunc" title="Permanent link">&para;</a></h2>
2122 <p>Defined in FT_IMAGE_H (freetype/ftimage.h).</p>
2123 <div class = "codehilite"><pre><code>  <span class="keyword">typedef</span> <span class="keyword">int</span>
2124   (*<b>FT_Outline_LineToFunc</b>)( <span class="keyword">const</span> <a href="ft2-basic_types.html#ft_vector">FT_Vector</a>*  to,
2125                             <span class="keyword">void</span>*             user );
2126
2127 #<span class="keyword">define</span> FT_Outline_LineTo_Func  <b>FT_Outline_LineToFunc</b>
2128 </code></pre></div>
2129
2130 <p>A function pointer type used to describe the signature of a &lsquo;line to&rsquo; function during outline walking/decomposition.</p>
2131 <p>A &lsquo;line to&rsquo; is emitted to indicate a segment in the outline.</p>
2132 <h4>input</h4>
2133 <table class="fields">
2134 <tr><td class="val" id="to">to</td><td class="desc">
2135 <p>A pointer to the target point of the &lsquo;line to&rsquo;.</p>
2136 </td></tr>
2137 <tr><td class="val" id="user">user</td><td class="desc">
2138 <p>A typeless pointer, which is passed from the caller of the decomposition function.</p>
2139 </td></tr>
2140 </table>
2141
2142 <h4>return</h4>
2143
2144 <p>Error code. 0&nbsp;means success.</p>
2145 <hr>
2146
2147 <h2 id="ft_outline_conictofunc">FT_Outline_ConicToFunc<a class="headerlink" href="#ft_outline_conictofunc" title="Permanent link">&para;</a></h2>
2148 <p>Defined in FT_IMAGE_H (freetype/ftimage.h).</p>
2149 <div class = "codehilite"><pre><code>  <span class="keyword">typedef</span> <span class="keyword">int</span>
2150   (*<b>FT_Outline_ConicToFunc</b>)( <span class="keyword">const</span> <a href="ft2-basic_types.html#ft_vector">FT_Vector</a>*  control,
2151                              <span class="keyword">const</span> <a href="ft2-basic_types.html#ft_vector">FT_Vector</a>*  to,
2152                              <span class="keyword">void</span>*             user );
2153
2154 #<span class="keyword">define</span> FT_Outline_ConicTo_Func  <b>FT_Outline_ConicToFunc</b>
2155 </code></pre></div>
2156
2157 <p>A function pointer type used to describe the signature of a &lsquo;conic to&rsquo; function during outline walking or decomposition.</p>
2158 <p>A &lsquo;conic to&rsquo; is emitted to indicate a second-order Bezier arc in the outline.</p>
2159 <h4>input</h4>
2160 <table class="fields">
2161 <tr><td class="val" id="control">control</td><td class="desc">
2162 <p>An intermediate control point between the last position and the new target in <code>to</code>.</p>
2163 </td></tr>
2164 <tr><td class="val" id="to">to</td><td class="desc">
2165 <p>A pointer to the target end point of the conic arc.</p>
2166 </td></tr>
2167 <tr><td class="val" id="user">user</td><td class="desc">
2168 <p>A typeless pointer, which is passed from the caller of the decomposition function.</p>
2169 </td></tr>
2170 </table>
2171
2172 <h4>return</h4>
2173
2174 <p>Error code. 0&nbsp;means success.</p>
2175 <hr>
2176
2177 <h2 id="ft_outline_cubictofunc">FT_Outline_CubicToFunc<a class="headerlink" href="#ft_outline_cubictofunc" title="Permanent link">&para;</a></h2>
2178 <p>Defined in FT_IMAGE_H (freetype/ftimage.h).</p>
2179 <div class = "codehilite"><pre><code>  <span class="keyword">typedef</span> <span class="keyword">int</span>
2180   (*<b>FT_Outline_CubicToFunc</b>)( <span class="keyword">const</span> <a href="ft2-basic_types.html#ft_vector">FT_Vector</a>*  control1,
2181                              <span class="keyword">const</span> <a href="ft2-basic_types.html#ft_vector">FT_Vector</a>*  control2,
2182                              <span class="keyword">const</span> <a href="ft2-basic_types.html#ft_vector">FT_Vector</a>*  to,
2183                              <span class="keyword">void</span>*             user );
2184
2185 #<span class="keyword">define</span> FT_Outline_CubicTo_Func  <b>FT_Outline_CubicToFunc</b>
2186 </code></pre></div>
2187
2188 <p>A function pointer type used to describe the signature of a &lsquo;cubic to&rsquo; function during outline walking or decomposition.</p>
2189 <p>A &lsquo;cubic to&rsquo; is emitted to indicate a third-order Bezier arc.</p>
2190 <h4>input</h4>
2191 <table class="fields">
2192 <tr><td class="val" id="control1">control1</td><td class="desc">
2193 <p>A pointer to the first Bezier control point.</p>
2194 </td></tr>
2195 <tr><td class="val" id="control2">control2</td><td class="desc">
2196 <p>A pointer to the second Bezier control point.</p>
2197 </td></tr>
2198 <tr><td class="val" id="to">to</td><td class="desc">
2199 <p>A pointer to the target end point.</p>
2200 </td></tr>
2201 <tr><td class="val" id="user">user</td><td class="desc">
2202 <p>A typeless pointer, which is passed from the caller of the decomposition function.</p>
2203 </td></tr>
2204 </table>
2205
2206 <h4>return</h4>
2207
2208 <p>Error code. 0&nbsp;means success.</p>
2209 <hr>
2210
2211 <h2 id="ft_orientation">FT_Orientation<a class="headerlink" href="#ft_orientation" title="Permanent link">&para;</a></h2>
2212 <p>Defined in FT_OUTLINE_H (freetype/ftoutln.h).</p>
2213 <div class = "codehilite"><pre><code>  <span class="keyword">typedef</span> <span class="keyword">enum</span>  FT_Orientation_
2214   {
2215     <a href="ft2-outline_processing.html#ft_orientation_truetype">FT_ORIENTATION_TRUETYPE</a>   = 0,
2216     <a href="ft2-outline_processing.html#ft_orientation_postscript">FT_ORIENTATION_POSTSCRIPT</a> = 1,
2217     <a href="ft2-outline_processing.html#ft_orientation_fill_right">FT_ORIENTATION_FILL_RIGHT</a> = <a href="ft2-outline_processing.html#ft_orientation_truetype">FT_ORIENTATION_TRUETYPE</a>,
2218     <a href="ft2-outline_processing.html#ft_orientation_fill_left">FT_ORIENTATION_FILL_LEFT</a>  = <a href="ft2-outline_processing.html#ft_orientation_postscript">FT_ORIENTATION_POSTSCRIPT</a>,
2219     <a href="ft2-outline_processing.html#ft_orientation_none">FT_ORIENTATION_NONE</a>
2220
2221   } <b>FT_Orientation</b>;
2222 </code></pre></div>
2223
2224 <p>A list of values used to describe an outline's contour orientation.</p>
2225 <p>The TrueType and PostScript specifications use different conventions to determine whether outline contours should be filled or unfilled.</p>
2226 <h4>values</h4>
2227 <table class="fields">
2228 <tr><td class="val" id="ft_orientation_truetype">FT_ORIENTATION_TRUETYPE</td><td class="desc">
2229 <p>According to the TrueType specification, clockwise contours must be filled, and counter-clockwise ones must be unfilled.</p>
2230 </td></tr>
2231 <tr><td class="val" id="ft_orientation_postscript">FT_ORIENTATION_POSTSCRIPT</td><td class="desc">
2232 <p>According to the PostScript specification, counter-clockwise contours must be filled, and clockwise ones must be unfilled.</p>
2233 </td></tr>
2234 <tr><td class="val" id="ft_orientation_fill_right">FT_ORIENTATION_FILL_RIGHT</td><td class="desc">
2235 <p>This is identical to <code><a href="ft2-outline_processing.html#ft_orientation">FT_ORIENTATION_TRUETYPE</a></code>, but is used to remember that in TrueType, everything that is to the right of the drawing direction of a contour must be filled.</p>
2236 </td></tr>
2237 <tr><td class="val" id="ft_orientation_fill_left">FT_ORIENTATION_FILL_LEFT</td><td class="desc">
2238 <p>This is identical to <code><a href="ft2-outline_processing.html#ft_orientation">FT_ORIENTATION_POSTSCRIPT</a></code>, but is used to remember that in PostScript, everything that is to the left of the drawing direction of a contour must be filled.</p>
2239 </td></tr>
2240 <tr><td class="val" id="ft_orientation_none">FT_ORIENTATION_NONE</td><td class="desc">
2241 <p>The orientation cannot be determined. That is, different parts of the glyph have different orientation.</p>
2242 </td></tr>
2243 </table>
2244
2245 <hr>
2246
2247 <h2 id="ft_outline_get_orientation">FT_Outline_Get_Orientation<a class="headerlink" href="#ft_outline_get_orientation" title="Permanent link">&para;</a></h2>
2248 <p>Defined in FT_OUTLINE_H (freetype/ftoutln.h).</p>
2249 <div class = "codehilite"><pre><code>  FT_EXPORT( <a href="ft2-outline_processing.html#ft_orientation">FT_Orientation</a> )
2250   <b>FT_Outline_Get_Orientation</b>( <a href="ft2-outline_processing.html#ft_outline">FT_Outline</a>*  outline );
2251 </code></pre></div>
2252
2253 <p>This function analyzes a glyph outline and tries to compute its fill orientation (see <code><a href="ft2-outline_processing.html#ft_orientation">FT_Orientation</a></code>). This is done by integrating the total area covered by the outline. The positive integral corresponds to the clockwise orientation and <code><a href="ft2-outline_processing.html#ft_orientation">FT_ORIENTATION_POSTSCRIPT</a></code> is returned. The negative integral corresponds to the counter-clockwise orientation and <code><a href="ft2-outline_processing.html#ft_orientation">FT_ORIENTATION_TRUETYPE</a></code> is returned.</p>
2254 <p>Note that this will return <code><a href="ft2-outline_processing.html#ft_orientation">FT_ORIENTATION_TRUETYPE</a></code> for empty outlines.</p>
2255 <h4>input</h4>
2256 <table class="fields">
2257 <tr><td class="val" id="outline">outline</td><td class="desc">
2258 <p>A handle to the source outline.</p>
2259 </td></tr>
2260 </table>
2261
2262 <h4>return</h4>
2263
2264 <p>The orientation.</p>
2265 <hr>
2266
2267 <h2 id="ft_outline_xxx">FT_OUTLINE_XXX<a class="headerlink" href="#ft_outline_xxx" title="Permanent link">&para;</a></h2>
2268 <p>Defined in FT_IMAGE_H (freetype/ftimage.h).</p>
2269 <div class = "codehilite"><pre><code>#<span class="keyword">define</span> <a href="ft2-outline_processing.html#ft_outline_none">FT_OUTLINE_NONE</a>             0x0
2270 #<span class="keyword">define</span> <a href="ft2-outline_processing.html#ft_outline_owner">FT_OUTLINE_OWNER</a>            0x1
2271 #<span class="keyword">define</span> <a href="ft2-outline_processing.html#ft_outline_even_odd_fill">FT_OUTLINE_EVEN_ODD_FILL</a>    0x2
2272 #<span class="keyword">define</span> <a href="ft2-outline_processing.html#ft_outline_reverse_fill">FT_OUTLINE_REVERSE_FILL</a>     0x4
2273 #<span class="keyword">define</span> <a href="ft2-outline_processing.html#ft_outline_ignore_dropouts">FT_OUTLINE_IGNORE_DROPOUTS</a>  0x8
2274 #<span class="keyword">define</span> <a href="ft2-outline_processing.html#ft_outline_smart_dropouts">FT_OUTLINE_SMART_DROPOUTS</a>   0x10
2275 #<span class="keyword">define</span> <a href="ft2-outline_processing.html#ft_outline_include_stubs">FT_OUTLINE_INCLUDE_STUBS</a>    0x20
2276 #<span class="keyword">define</span> <a href="ft2-outline_processing.html#ft_outline_overlap">FT_OUTLINE_OVERLAP</a>          0x40
2277
2278 #<span class="keyword">define</span> <a href="ft2-outline_processing.html#ft_outline_high_precision">FT_OUTLINE_HIGH_PRECISION</a>   0x100
2279 #<span class="keyword">define</span> <a href="ft2-outline_processing.html#ft_outline_single_pass">FT_OUTLINE_SINGLE_PASS</a>      0x200
2280
2281
2282   /* these constants are deprecated; use the corresponding */
2283   /* `<b>FT_OUTLINE_XXX</b>` values instead                       */
2284 #<span class="keyword">define</span> ft_outline_none             <a href="ft2-outline_processing.html#ft_outline_none">FT_OUTLINE_NONE</a>
2285 #<span class="keyword">define</span> ft_outline_owner            <a href="ft2-outline_processing.html#ft_outline_owner">FT_OUTLINE_OWNER</a>
2286 #<span class="keyword">define</span> ft_outline_even_odd_fill    <a href="ft2-outline_processing.html#ft_outline_even_odd_fill">FT_OUTLINE_EVEN_ODD_FILL</a>
2287 #<span class="keyword">define</span> ft_outline_reverse_fill     <a href="ft2-outline_processing.html#ft_outline_reverse_fill">FT_OUTLINE_REVERSE_FILL</a>
2288 #<span class="keyword">define</span> ft_outline_ignore_dropouts  <a href="ft2-outline_processing.html#ft_outline_ignore_dropouts">FT_OUTLINE_IGNORE_DROPOUTS</a>
2289 #<span class="keyword">define</span> ft_outline_high_precision   <a href="ft2-outline_processing.html#ft_outline_high_precision">FT_OUTLINE_HIGH_PRECISION</a>
2290 #<span class="keyword">define</span> ft_outline_single_pass      <a href="ft2-outline_processing.html#ft_outline_single_pass">FT_OUTLINE_SINGLE_PASS</a>
2291 </code></pre></div>
2292
2293 <p>A list of bit-field constants used for the flags in an outline's <code>flags</code> field.</p>
2294 <h4>values</h4>
2295 <table class="fields long">
2296 <tr><td class="val" id="ft_outline_none">FT_OUTLINE_NONE</td><td class="desc">
2297 <p>Value&nbsp;0 is reserved.</p>
2298 </td></tr>
2299 <tr><td class="val" id="ft_outline_owner">FT_OUTLINE_OWNER</td><td class="desc">
2300 <p>If set, this flag indicates that the outline's field arrays (i.e., <code>points</code>, <code>flags</code>, and <code>contours</code>) are &lsquo;owned&rsquo; by the outline object, and should thus be freed when it is destroyed.</p>
2301 </td></tr>
2302 <tr><td class="val" id="ft_outline_even_odd_fill">FT_OUTLINE_EVEN_ODD_FILL</td><td class="desc">
2303 <p>By default, outlines are filled using the non-zero winding rule. If set to 1, the outline will be filled using the even-odd fill rule (only works with the smooth rasterizer).</p>
2304 </td></tr>
2305 <tr><td class="val" id="ft_outline_reverse_fill">FT_OUTLINE_REVERSE_FILL</td><td class="desc">
2306 <p>By default, outside contours of an outline are oriented in clock-wise direction, as defined in the TrueType specification. This flag is set if the outline uses the opposite direction (typically for Type&nbsp;1 fonts). This flag is ignored by the scan converter.</p>
2307 </td></tr>
2308 <tr><td class="val" id="ft_outline_ignore_dropouts">FT_OUTLINE_IGNORE_DROPOUTS</td><td class="desc">
2309 <p>By default, the scan converter will try to detect drop-outs in an outline and correct the glyph bitmap to ensure consistent shape continuity. If set, this flag hints the scan-line converter to ignore such cases. See below for more information.</p>
2310 </td></tr>
2311 <tr><td class="val" id="ft_outline_smart_dropouts">FT_OUTLINE_SMART_DROPOUTS</td><td class="desc">
2312 <p>Select smart dropout control. If unset, use simple dropout control. Ignored if <code><a href="ft2-outline_processing.html#ft_outline_xxx">FT_OUTLINE_IGNORE_DROPOUTS</a></code> is set. See below for more information.</p>
2313 </td></tr>
2314 <tr><td class="val" id="ft_outline_include_stubs">FT_OUTLINE_INCLUDE_STUBS</td><td class="desc">
2315 <p>If set, turn pixels on for &lsquo;stubs&rsquo;, otherwise exclude them. Ignored if <code><a href="ft2-outline_processing.html#ft_outline_xxx">FT_OUTLINE_IGNORE_DROPOUTS</a></code> is set. See below for more information.</p>
2316 </td></tr>
2317 <tr><td class="val" id="ft_outline_overlap">FT_OUTLINE_OVERLAP</td><td class="desc">
2318 <p>[Since 2.10.3] This flag indicates that this outline contains overlapping contours and the anti-aliased renderer should perform oversampling to mitigate possible artifacts. This flag should <em>not</em> be set for well designed glyphs without overlaps because it quadruples the rendering time.</p>
2319 </td></tr>
2320 <tr><td class="val" id="ft_outline_high_precision">FT_OUTLINE_HIGH_PRECISION</td><td class="desc">
2321 <p>This flag indicates that the scan-line converter should try to convert this outline to bitmaps with the highest possible quality. It is typically set for small character sizes. Note that this is only a hint that might be completely ignored by a given scan-converter.</p>
2322 </td></tr>
2323 <tr><td class="val" id="ft_outline_single_pass">FT_OUTLINE_SINGLE_PASS</td><td class="desc">
2324 <p>This flag is set to force a given scan-converter to only use a single pass over the outline to render a bitmap glyph image. Normally, it is set for very large character sizes. It is only a hint that might be completely ignored by a given scan-converter.</p>
2325 </td></tr>
2326 </table>
2327
2328 <h4>note</h4>
2329
2330 <p>The flags <code><a href="ft2-outline_processing.html#ft_outline_xxx">FT_OUTLINE_IGNORE_DROPOUTS</a></code>, <code><a href="ft2-outline_processing.html#ft_outline_xxx">FT_OUTLINE_SMART_DROPOUTS</a></code>, and <code><a href="ft2-outline_processing.html#ft_outline_xxx">FT_OUTLINE_INCLUDE_STUBS</a></code> are ignored by the smooth rasterizer.</p>
2331 <p>There exists a second mechanism to pass the drop-out mode to the B/W rasterizer; see the <code>tags</code> field in <code><a href="ft2-outline_processing.html#ft_outline">FT_Outline</a></code>.</p>
2332 <p>Please refer to the description of the &lsquo;SCANTYPE&rsquo; instruction in the OpenType specification (in file <code>ttinst1.doc</code>) how simple drop-outs, smart drop-outs, and stubs are defined.</p>
2333 <hr>
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2408     <script id="__config" type="application/json">{"base": ".", "features": [], "search": "assets/javascripts/workers/search.477d984a.min.js", "translations": {"clipboard.copied": "Copied to clipboard", "clipboard.copy": "Copy to clipboard", "search.config.lang": "en", "search.config.pipeline": "trimmer, stopWordFilter", "search.config.separator": "[\\s\\-]+", "search.placeholder": "Search", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.placeholder": "Type to start searching", "search.result.term.missing": "Missing", "select.version.title": "Select version"}, "version": null}</script>
2409
2410
2411       <script src="assets/javascripts/bundle.82b56eb2.min.js"></script>
2412
2413         <script src="javascripts/extra.js"></script>
2414
2415
2416   </body>
2417 </html>