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ftbbox.h

ftbbox.h 4.2 KB
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  1. /***************************************************************************/
    2. 

  2. /*                                                                         */
    3. 

  3. /*  ftbbox.h                                                               */
    4. 

  4. /*                                                                         */
    5. 

  5. /*    FreeType exact bbox computation (specification).                     */
    6. 

  6. /*                                                                         */
    7. 

  7. /*  Copyright 1996-2001 by                                                 */
    8. 

  8. /*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
    9. 

  9. /*                                                                         */
    10. 

  10. /*  This file is part of the FreeType project, and may only be used,       */
    11. 

  11. /*  modified, and distributed under the terms of the FreeType project      */
    12. 

  12. /*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */
    13. 

  13. /*  this file you indicate that you have read the license and              */
    14. 

  14. /*  understand and accept it fully.                                        */
    15. 

  15. /*                                                                         */
    16. 

  16. /***************************************************************************/
    17. 

  17. 

  18. 

  19.   /*************************************************************************/
    20. 

  20.   /*                                                                       */
    21. 

  21.   /* This component has a _single_ role: to compute exact outline bounding */
    22. 

  22.   /* boxes.                                                                */
    23. 

  23.   /*                                                                       */
    24. 

  24.   /* It is separated from the rest of the engine for various technical     */
    25. 

  25.   /* reasons.  It may well be integrated in `ftoutln' later.               */
    26. 

  26.   /*                                                                       */
    27. 

  27.   /*************************************************************************/
    28. 

  28. 

  29. 

  30. #ifndef __FTBBOX_H__
    31. 

  31. #define __FTBBOX_H__
    32. 

  32. 

  33. 

  34. #include <ft2build.h>
    35. 

  35. #include FT_FREETYPE_H
    36. 

  36. 

  37. 

  38. FT_BEGIN_HEADER
    39. 

  39. 

  40. 

  41.   /*************************************************************************/
    42. 

  42.   /*                                                                       */
    43. 

  43.   /* <Section>                                                             */
    44. 

  44.   /*    outline_processing                                                 */
    45. 

  45.   /*                                                                       */
    46. 

  46.   /*************************************************************************/
    47. 

  47. 

  48. 

  49.   /*************************************************************************/
    50. 

  50.   /*                                                                       */
    51. 

  51.   /* <Function>                                                            */
    52. 

  52.   /*    FT_Outline_Get_BBox                                                */
    53. 

  53.   /*                                                                       */
    54. 

  54.   /* <Description>                                                         */
    55. 

  55.   /*    Computes the exact bounding box of an outline.  This is slower     */
    56. 

  56.   /*    than computing the control box.  However, it uses an advanced      */
    57. 

  57.   /*    algorithm which returns _very_ quickly when the two boxes          */
    58. 

  58.   /*    coincide.  Otherwise, the outline Bezier arcs are walked over to   */
    59. 

  59.   /*    extract their extrema.                                             */
    60. 

  60.   /*                                                                       */
    61. 

  61.   /* <Input>                                                               */
    62. 

  62.   /*    outline :: A pointer to the source outline.                        */
    63. 

  63.   /*                                                                       */
    64. 

  64.   /* <Output>                                                              */
    65. 

  65.   /*    abbox   :: The outline's exact bounding box.                       */
    66. 

  66.   /*                                                                       */
    67. 

  67.   /* <Return>                                                              */
    68. 

  68.   /*    FreeType error code.  0 means success.                             */
    69. 

  69.   /*                                                                       */
    70. 

  70.   FT_EXPORT( FT_Error )
    71. 

  71.   FT_Outline_Get_BBox( FT_Outline*  outline,
    72. 

  72.                        FT_BBox     *abbox );
    73. 

  73. 

  74. 

  75.   /* */
    76. 

  76. 

  77. 

  78. FT_END_HEADER
    79. 

  79. 

  80. #endif /* __FTBBOX_H__ */
    81. 

  81. 

  82. 

  83. /* END */
    84.