libraries/freetype-2.0.5/include/freetype/ftbbox.h

   1 /***************************************************************************/
   2 /*                                                                         */
   3 /*  ftbbox.h                                                               */
   4 /*                                                                         */
   5 /*    FreeType exact bbox computation (specification).                     */
   6 /*                                                                         */
   7 /*  Copyright 1996-2001 by                                                 */
   8 /*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
   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
  18
  19   /*************************************************************************/
  20   /*                                                                       */
  21   /* This component has a _single_ role: to compute exact outline bounding */
  22   /* boxes.                                                                */
  23   /*                                                                       */
  24   /* It is separated from the rest of the engine for various technical     */
  25   /* reasons.  It may well be integrated in `ftoutln' later.               */
  26   /*                                                                       */
  27   /*************************************************************************/
  28
  29
  30 #ifndef __FTBBOX_H__
  31 #define __FTBBOX_H__
  32
  33
  34 #include <ft2build.h>
  35 #include FT_FREETYPE_H
  36
  37
  38 FT_BEGIN_HEADER
  39
  40
  41   /*************************************************************************/
  42   /*                                                                       */
  43   /* <Section>                                                             */
  44   /*    outline_processing                                                 */
  45   /*                                                                       */
  46   /*************************************************************************/
  47
  48
  49   /*************************************************************************/
  50   /*                                                                       */
  51   /* <Function>                                                            */
  52   /*    FT_Outline_Get_BBox                                                */
  53   /*                                                                       */
  54   /* <Description>                                                         */
  55   /*    Computes the exact bounding box of an outline.  This is slower     */
  56   /*    than computing the control box.  However, it uses an advanced      */
  57   /*    algorithm which returns _very_ quickly when the two boxes          */
  58   /*    coincide.  Otherwise, the outline Bezier arcs are walked over to   */
  59   /*    extract their extrema.                                             */
  60   /*                                                                       */
  61   /* <Input>                                                               */
  62   /*    outline :: A pointer to the source outline.                        */
  63   /*                                                                       */
  64   /* <Output>                                                              */
  65   /*    abbox   :: The outline's exact bounding box.                       */
  66   /*                                                                       */
  67   /* <Return>                                                              */
  68   /*    FreeType error code.  0 means success.                             */
  69   /*                                                                       */
  70   FT_EXPORT( FT_Error )
  71   FT_Outline_Get_BBox( FT_Outline*  outline,
  72                        FT_BBox     *abbox );
  73
  74
  75   /* */
  76
  77
  78 FT_END_HEADER
  79
  80 #endif /* __FTBBOX_H__ */
  81
  82
  83 /* END */