extension/SDL2_ttf-2.0.14/external/freetype-2.4.12/include/freetype/ftbbox.h

   1 /***************************************************************************/
   2 /*                                                                         */
   3 /*  ftbbox.h                                                               */
   4 /*                                                                         */
   5 /*    FreeType exact bbox computation (specification).                     */
   6 /*                                                                         */
   7 /*  Copyright 1996-2001, 2003, 2007, 2011 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 #ifdef FREETYPE_H
  38 #error "freetype.h of FreeType 1 has been loaded!"
  39 #error "Please fix the directory search order for header files"
  40 #error "so that freetype.h of FreeType 2 is found first."
  41 #endif
  42
  43
  44 FT_BEGIN_HEADER
  45
  46
  47   /*************************************************************************/
  48   /*                                                                       */
  49   /* <Section>                                                             */
  50   /*    outline_processing                                                 */
  51   /*                                                                       */
  52   /*************************************************************************/
  53
  54
  55   /*************************************************************************/
  56   /*                                                                       */
  57   /* <Function>                                                            */
  58   /*    FT_Outline_Get_BBox                                                */
  59   /*                                                                       */
  60   /* <Description>                                                         */
  61   /*    Compute the exact bounding box of an outline.  This is slower      */
  62   /*    than computing the control box.  However, it uses an advanced      */
  63   /*    algorithm which returns _very_ quickly when the two boxes          */
  64   /*    coincide.  Otherwise, the outline Bézier arcs are traversed to     */
  65   /*    extract their extrema.                                             */
  66   /*                                                                       */
  67   /* <Input>                                                               */
  68   /*    outline :: A pointer to the source outline.                        */
  69   /*                                                                       */
  70   /* <Output>                                                              */
  71   /*    abbox   :: The outline's exact bounding box.                       */
  72   /*                                                                       */
  73   /* <Return>                                                              */
  74   /*    FreeType error code.  0~means success.                             */
  75   /*                                                                       */
  76   /* <Note>                                                                */
  77   /*    If the font is tricky and the glyph has been loaded with           */
  78   /*    @FT_LOAD_NO_SCALE, the resulting BBox is meaningless.  To get      */
  79   /*    reasonable values for the BBox it is necessary to load the glyph   */
  80   /*    at a large ppem value (so that the hinting instructions can        */
  81   /*    properly shift and scale the subglyphs), then extracting the BBox  */
  82   /*    which can be eventually converted back to font units.              */
  83   /*                                                                       */
  84   FT_EXPORT( FT_Error )
  85   FT_Outline_Get_BBox( FT_Outline*  outline,
  86                        FT_BBox     *abbox );
  87
  88
  89   /* */
  90
  91
  92 FT_END_HEADER
  93
  94 #endif /* __FTBBOX_H__ */
  95
  96
  97 /* END */
  98
  99
 100 /* Local Variables: */
 101 /* coding: utf-8    */
 102 /* End:             */