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/harfbuzz/src/hb-old/harfbuzz-gsub.h

http://github.com/brson/rust-harfbuzz
C Header | 148 lines | 75 code | 40 blank | 33 comment | 0 complexity | ed7f4fc6ef7ecc6491258f3a3dba6fce MD5 | raw file
Possible License(s): Apache-2.0, MIT
  1. /*
  2. * Copyright (C) 1998-2004 David Turner and Werner Lemberg
  3. * Copyright (C) 2006 Behdad Esfahbod
  4. *
  5. * This is part of HarfBuzz, an OpenType Layout engine library.
  6. *
  7. * Permission is hereby granted, without written agreement and without
  8. * license or royalty fees, to use, copy, modify, and distribute this
  9. * software and its documentation for any purpose, provided that the
  10. * above copyright notice and the following two paragraphs appear in
  11. * all copies of this software.
  12. *
  13. * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
  14. * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
  15. * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
  16. * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
  17. * DAMAGE.
  18. *
  19. * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
  20. * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
  21. * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
  22. * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
  23. * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
  24. */
  25. #ifndef HARFBUZZ_GSUB_H
  26. #define HARFBUZZ_GSUB_H
  27. #include "harfbuzz-gdef.h"
  28. #include "harfbuzz-buffer.h"
  29. HB_BEGIN_HEADER
  30. #ifdef HB_USE_PACKED_STRUCTS
  31. #pragma pack(push, 1)
  32. #endif
  33. /* Lookup types for glyph substitution */
  34. #define HB_GSUB_LOOKUP_SINGLE 1
  35. #define HB_GSUB_LOOKUP_MULTIPLE 2
  36. #define HB_GSUB_LOOKUP_ALTERNATE 3
  37. #define HB_GSUB_LOOKUP_LIGATURE 4
  38. #define HB_GSUB_LOOKUP_CONTEXT 5
  39. #define HB_GSUB_LOOKUP_CHAIN 6
  40. #define HB_GSUB_LOOKUP_EXTENSION 7
  41. #define HB_GSUB_LOOKUP_REVERSE_CHAIN 8
  42. /* A pointer to a function which selects the alternate glyph. `pos' is
  43. the position of the glyph with index `glyphID', `num_alternates'
  44. gives the number of alternates in the `alternates' array. `data'
  45. points to the user-defined structure specified during a call to
  46. HB_GSUB_Register_Alternate_Function(). The function must return an
  47. index into the `alternates' array. */
  48. typedef HB_UShort (*HB_AltFunction)(HB_UInt pos,
  49. HB_UShort glyphID,
  50. HB_UShort num_alternates,
  51. HB_UShort* alternates,
  52. void* data );
  53. struct HB_GSUBHeader_
  54. {
  55. HB_GDEFHeader* gdef;
  56. /* the next two fields are used for an alternate substitution callback
  57. function to select the proper alternate glyph. */
  58. void* data;
  59. HB_AltFunction altfunc;
  60. HB_UInt offset;
  61. HB_16Dot16 Version;
  62. HB_ScriptList ScriptList;
  63. HB_FeatureList FeatureList;
  64. HB_LookupList LookupList;
  65. };
  66. typedef struct HB_GSUBHeader_ HB_GSUBHeader;
  67. typedef HB_GSUBHeader* HB_GSUB;
  68. HB_Error HB_Load_GSUB_Table( HB_Stream stream,
  69. HB_GSUBHeader** gsub,
  70. HB_GDEFHeader* gdef,
  71. HB_Stream gdefStream );
  72. HB_Error HB_Done_GSUB_Table( HB_GSUBHeader* gsub );
  73. HB_Error HB_GSUB_Select_Script( HB_GSUBHeader* gsub,
  74. HB_UInt script_tag,
  75. HB_UShort* script_index );
  76. HB_Error HB_GSUB_Select_Language( HB_GSUBHeader* gsub,
  77. HB_UInt language_tag,
  78. HB_UShort script_index,
  79. HB_UShort* language_index,
  80. HB_UShort* req_feature_index );
  81. HB_Error HB_GSUB_Select_Feature( HB_GSUBHeader* gsub,
  82. HB_UInt feature_tag,
  83. HB_UShort script_index,
  84. HB_UShort language_index,
  85. HB_UShort* feature_index );
  86. HB_Error HB_GSUB_Query_Scripts( HB_GSUBHeader* gsub,
  87. HB_UInt** script_tag_list );
  88. HB_Error HB_GSUB_Query_Languages( HB_GSUBHeader* gsub,
  89. HB_UShort script_index,
  90. HB_UInt** language_tag_list );
  91. HB_Error HB_GSUB_Query_Features( HB_GSUBHeader* gsub,
  92. HB_UShort script_index,
  93. HB_UShort language_index,
  94. HB_UInt** feature_tag_list );
  95. HB_Error HB_GSUB_Add_Feature( HB_GSUBHeader* gsub,
  96. HB_UShort feature_index,
  97. HB_UInt property );
  98. HB_Error HB_GSUB_Clear_Features( HB_GSUBHeader* gsub );
  99. HB_Error HB_GSUB_Register_Alternate_Function( HB_GSUBHeader* gsub,
  100. HB_AltFunction altfunc,
  101. void* data );
  102. HB_Error HB_GSUB_Apply_String( HB_GSUBHeader* gsub,
  103. HB_Buffer buffer );
  104. #ifdef HB_USE_PACKED_STRUCTS
  105. #pragma pack(pop)
  106. #endif
  107. HB_END_HEADER
  108. #endif /* HARFBUZZ_GSUB_H */