ftbzip2.h 4.2 KB

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  1. /***************************************************************************/
  2. /* */
  3. /* ftbzip2.h */
  4. /* */
  5. /* Bzip2-compressed stream support. */
  6. /* */
  7. /* Copyright 2010 by */
  8. /* Joel Klinghed. */
  9. /* */
  10. /* This file is part of the FreeType project, and may only be used, */
  11. /* modified, and distributed under the terms of the FreeType project */
  12. /* license, LICENSE.TXT. By continuing to use, modify, or distribute */
  13. /* this file you indicate that you have read the license and */
  14. /* understand and accept it fully. */
  15. /* */
  16. /***************************************************************************/
  17. #ifndef __FTBZIP2_H__
  18. #define __FTBZIP2_H__
  19. #include <ft2build.h>
  20. #include FT_FREETYPE_H
  21. #ifdef FREETYPE_H
  22. #error "freetype.h of FreeType 1 has been loaded!"
  23. #error "Please fix the directory search order for header files"
  24. #error "so that freetype.h of FreeType 2 is found first."
  25. #endif
  26. FT_BEGIN_HEADER
  27. /*************************************************************************/
  28. /* */
  29. /* <Section> */
  30. /* bzip2 */
  31. /* */
  32. /* <Title> */
  33. /* BZIP2 Streams */
  34. /* */
  35. /* <Abstract> */
  36. /* Using bzip2-compressed font files. */
  37. /* */
  38. /* <Description> */
  39. /* This section contains the declaration of Bzip2-specific functions. */
  40. /* */
  41. /*************************************************************************/
  42. /************************************************************************
  43. *
  44. * @function:
  45. * FT_Stream_OpenBzip2
  46. *
  47. * @description:
  48. * Open a new stream to parse bzip2-compressed font files. This is
  49. * mainly used to support the compressed `*.pcf.bz2' fonts that come
  50. * with XFree86.
  51. *
  52. * @input:
  53. * stream ::
  54. * The target embedding stream.
  55. *
  56. * source ::
  57. * The source stream.
  58. *
  59. * @return:
  60. * FreeType error code. 0~means success.
  61. *
  62. * @note:
  63. * The source stream must be opened _before_ calling this function.
  64. *
  65. * Calling the internal function `FT_Stream_Close' on the new stream will
  66. * *not* call `FT_Stream_Close' on the source stream. None of the stream
  67. * objects will be released to the heap.
  68. *
  69. * The stream implementation is very basic and resets the decompression
  70. * process each time seeking backwards is needed within the stream.
  71. *
  72. * In certain builds of the library, bzip2 compression recognition is
  73. * automatically handled when calling @FT_New_Face or @FT_Open_Face.
  74. * This means that if no font driver is capable of handling the raw
  75. * compressed file, the library will try to open a bzip2 compressed stream
  76. * from it and re-open the face with it.
  77. *
  78. * This function may return `FT_Err_Unimplemented_Feature' if your build
  79. * of FreeType was not compiled with bzip2 support.
  80. */
  81. FT_EXPORT( FT_Error )
  82. FT_Stream_OpenBzip2( FT_Stream stream,
  83. FT_Stream source );
  84. /* */
  85. FT_END_HEADER
  86. #endif /* __FTBZIP2_H__ */
  87. /* END */