code:
/***************************************************************************/
/*                                                                         */
/*  ftpfr.h                                                                */
/*                                                                         */
/*    FreeType API for accessing PFR-specific data (specification only).   */
/*                                                                         */
/*  Copyright 2002-2017 by                                                 */
/*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
/*                                                                         */
/*  This file is part of the FreeType project, and may only be used,       */
/*  modified, and distributed under the terms of the FreeType project      */
/*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */
/*  this file you indicate that you have read the license and              */
/*  understand and accept it fully.                                        */
/*                                                                         */
/***************************************************************************/

#ifndef FTPFR_H_
#define FTPFR_H_

#include <ft2build.h>
#include FT_FREETYPE_H

#ifdef FREETYPE_H
#error "freetype.h of FreeType 1 has been loaded!"
#error "Please fix the directory search order for header files"
#error "so that freetype.h of FreeType 2 is found first."
#endif

FT_BEGIN_HEADER

  /*************************************************************************/
  /*                                                                       */
  /* <Section>                                                             */
  /*    pfr_fonts                                                          */
  /*                                                                       */
  /* <Title>                                                               */
  /*    PFR Fonts                                                          */
  /*                                                                       */
  /* <Abstract>                                                            */
  /*    PFR/TrueDoc specific API.                                          */
  /*                                                                       */
  /* <Description>                                                         */
  /*    This section contains the declaration of PFR-specific functions.   */
  /*                                                                       */
  /*************************************************************************/

 /**********************************************************************
  *
  * @function:
  *    FT_Get_PFR_Metrics
  *
  * @description:
  *    Return the outline and metrics resolutions of a given PFR face.
  *
  * @input:
  *    face :: Handle to the input face.  It can be a non-PFR face.
  *
  * @output:
  *    aoutline_resolution ::
  *      Outline resolution.  This is equivalent to `face->units_per_EM'
  *      for non-PFR fonts.  Optional (parameter can be NULL).
  *
  *    ametrics_resolution ::
  *      Metrics resolution.  This is equivalent to `outline_resolution'
  *      for non-PFR fonts.  Optional (parameter can be NULL).
  *
  *    ametrics_x_scale ::
  *      A 16.16 fixed-point number used to scale distance expressed
  *      in metrics units to device sub-pixels.  This is equivalent to
  *      `face->size->x_scale', but for metrics only.  Optional (parameter
  *      can be NULL).
  *
  *    ametrics_y_scale ::
  *      Same as `ametrics_x_scale' but for the vertical direction.
  *      optional (parameter can be NULL).
  *
  * @return:
  *    FreeType error code.  0~means success.
  *
  * @note:
  *   If the input face is not a PFR, this function will return an error.
  *   However, in all cases, it will return valid values.
  */
  FT_EXPORT( FT_Error )
  FT_Get_PFR_Metrics( FT_Face    face,
                      FT_UInt   *aoutline_resolution,
                      FT_UInt   *ametrics_resolution,
                      FT_Fixed  *ametrics_x_scale,
                      FT_Fixed  *ametrics_y_scale );

 /**********************************************************************
  *
  * @function:
  *    FT_Get_PFR_Kerning
  *
  * @description:
  *    Return the kerning pair corresponding to two glyphs in a PFR face.
  *    The distance is expressed in metrics units, unlike the result of
  *    @FT_Get_Kerning.
  *
  * @input:
  *    face  :: A handle to the input face.
  *
  *    left  :: Index of the left glyph.
  *
  *    right :: Index of the right glyph.
  *
  * @output:
  *    avector :: A kerning vector.
  *
  * @return:
  *    FreeType error code.  0~means success.
  *
  * @note:
  *    This function always return distances in original PFR metrics
  *    units.  This is unlike @FT_Get_Kerning with the @FT_KERNING_UNSCALED
  *    mode, which always returns distances converted to outline units.
  *
  *    You can use the value of the `x_scale' and `y_scale' parameters
  *    returned by @FT_Get_PFR_Metrics to scale these to device sub-pixels.
  */
  FT_EXPORT( FT_Error )
  FT_Get_PFR_Kerning( FT_Face     face,
                      FT_UInt     left,
                      FT_UInt     right,
                      FT_Vector  *avector );

 /**********************************************************************
  *
  * @function:
  *    FT_Get_PFR_Advance
  *
  * @description:
  *    Return a given glyph advance, expressed in original metrics units,
  *    from a PFR font.
  *
  * @input:
  *    face   :: A handle to the input face.
  *
  *    gindex :: The glyph index.
  *
  * @output:
  *    aadvance :: The glyph advance in metrics units.
  *
  * @return:
  *    FreeType error code.  0~means success.
  *
  * @note:
  *    You can use the `x_scale' or `y_scale' results of @FT_Get_PFR_Metrics
  *    to convert the advance to device sub-pixels (i.e., 1/64th of pixels).
  */
  FT_EXPORT( FT_Error )
  FT_Get_PFR_Advance( FT_Face   face,
                      FT_UInt   gindex,
                      FT_Pos   *aadvance );

  /* */

FT_END_HEADER

#endif /* FTPFR_H_ */

/* END */


code:
/***************************************************************************/
/*                                                                         */
/*  ftrender.h                                                             */
/*                                                                         */
/*    FreeType renderer modules public interface (specification).          */
/*                                                                         */
/*  Copyright 1996-2017 by                                                 */
/*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
/*                                                                         */
/*  This file is part of the FreeType project, and may only be used,       */
/*  modified, and distributed under the terms of the FreeType project      */
/*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */
/*  this file you indicate that you have read the license and              */
/*  understand and accept it fully.                                        */
/*                                                                         */
/***************************************************************************/

#ifndef FTRENDER_H_
#define FTRENDER_H_

#include <ft2build.h>
#include FT_MODULE_H
#include FT_GLYPH_H

FT_BEGIN_HEADER

  /*************************************************************************/
  /*                                                                       */
  /* <Section>                                                             */
  /*    module_management                                                  */
  /*                                                                       */
  /*************************************************************************/

  /* create a new glyph object */
  typedef FT_Error
  (*FT_Glyph_InitFunc)( FT_Glyph      glyph,
                        FT_GlyphSlot  slot );

  /* destroys a given glyph object */
  typedef void
  (*FT_Glyph_DoneFunc)( FT_Glyph  glyph );

  typedef void
  (*FT_Glyph_TransformFunc)( FT_Glyph          glyph,
                             const FT_Matrix*  matrix,
                             const FT_Vector*  delta );

  typedef void
  (*FT_Glyph_GetBBoxFunc)( FT_Glyph  glyph,
                           FT_BBox*  abbox );

  typedef FT_Error
  (*FT_Glyph_CopyFunc)( FT_Glyph   source,
                        FT_Glyph   target );

  typedef FT_Error
  (*FT_Glyph_PrepareFunc)( FT_Glyph      glyph,
                           FT_GlyphSlot  slot );

/* deprecated */
#define FT_Glyph_Init_Func       FT_Glyph_InitFunc
#define FT_Glyph_Done_Func       FT_Glyph_DoneFunc
#define FT_Glyph_Transform_Func  FT_Glyph_TransformFunc
#define FT_Glyph_BBox_Func       FT_Glyph_GetBBoxFunc
#define FT_Glyph_Copy_Func       FT_Glyph_CopyFunc
#define FT_Glyph_Prepare_Func    FT_Glyph_PrepareFunc

  struct  FT_Glyph_Class_
  {
    FT_Long                 glyph_size;
    FT_Glyph_Format         glyph_format;

    FT_Glyph_InitFunc       glyph_init;
    FT_Glyph_DoneFunc       glyph_done;
    FT_Glyph_CopyFunc       glyph_copy;
    FT_Glyph_TransformFunc  glyph_transform;
    FT_Glyph_GetBBoxFunc    glyph_bbox;
    FT_Glyph_PrepareFunc    glyph_prepare;
  };

  typedef FT_Error
  (*FT_Renderer_RenderFunc)( FT_Renderer       renderer,
                             FT_GlyphSlot      slot,
                             FT_UInt           mode,
                             const FT_Vector*  origin );

  typedef FT_Error
  (*FT_Renderer_TransformFunc)( FT_Renderer       renderer,
                                FT_GlyphSlot      slot,
                                const FT_Matrix*  matrix,
                                const FT_Vector*  delta );

  typedef void
  (*FT_Renderer_GetCBoxFunc)( FT_Renderer   renderer,
                              FT_GlyphSlot  slot,
                              FT_BBox*      cbox );

  typedef FT_Error
  (*FT_Renderer_SetModeFunc)( FT_Renderer  renderer,
                              FT_ULong     mode_tag,
                              FT_Pointer   mode_ptr );

/* deprecated identifiers */
#define FTRenderer_render  FT_Renderer_RenderFunc
#define FTRenderer_transform  FT_Renderer_TransformFunc
#define FTRenderer_getCBox  FT_Renderer_GetCBoxFunc
#define FTRenderer_setMode  FT_Renderer_SetModeFunc

  /*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    FT_Renderer_Class                                                  */
  /*                                                                       */
  /* <Description>                                                         */
  /*    The renderer module class descriptor.                              */
  /*                                                                       */
  /* <Fields>                                                              */
  /*    root            :: The root @FT_Module_Class fields.               */
  /*                                                                       */
  /*    glyph_format    :: The glyph image format this renderer handles.   */
  /*                                                                       */
  /*    render_glyph    :: A method used to render the image that is in a  */
  /*                       given glyph slot into a bitmap.                 */
  /*                                                                       */
  /*    transform_glyph :: A method used to transform the image that is in */
  /*                       a given glyph slot.                             */
  /*                                                                       */
  /*    get_glyph_cbox  :: A method used to access the glyph's cbox.       */
  /*                                                                       */
  /*    set_mode        :: A method used to pass additional parameters.    */
  /*                                                                       */
  /*    raster_class    :: For @FT_GLYPH_FORMAT_OUTLINE renderers only.    */
  /*                       This is a pointer to its raster's class.        */
  /*                                                                       */
  typedef struct  FT_Renderer_Class_
  {
    FT_Module_Class            root;

    FT_Glyph_Format            glyph_format;

    FT_Renderer_RenderFunc     render_glyph;
    FT_Renderer_TransformFunc  transform_glyph;
    FT_Renderer_GetCBoxFunc    get_glyph_cbox;
    FT_Renderer_SetModeFunc    set_mode;

    FT_Raster_Funcs*           raster_class;

  } FT_Renderer_Class;

  /*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_Get_Renderer                                                    */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Retrieve the current renderer for a given glyph format.            */
  /*                                                                       */
  /* <Input>                                                               */
  /*    library :: A handle to the library object.                         */
  /*                                                                       */
  /*    format  :: The glyph format.                                       */
  /*                                                                       */
  /* <Return>                                                              */
  /*    A renderer handle.  0~if none found.                               */
  /*                                                                       */
  /* <Note>                                                                */
  /*    An error will be returned if a module already exists by that name, */
  /*    or if the module requires a version of FreeType that is too great. */
  /*                                                                       */
  /*    To add a new renderer, simply use @FT_Add_Module.  To retrieve a   */
  /*    renderer by its name, use @FT_Get_Module.                          */
  /*                                                                       */
  FT_EXPORT( FT_Renderer )
  FT_Get_Renderer( FT_Library       library,
                   FT_Glyph_Format  format );

  /*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_Set_Renderer                                                    */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Set the current renderer to use, and set additional mode.          */
  /*                                                                       */
  /* <InOut>                                                               */
  /*    library    :: A handle to the library object.                      */
  /*                                                                       */
  /* <Input>                                                               */
  /*    renderer   :: A handle to the renderer object.                     */
  /*                                                                       */
  /*    num_params :: The number of additional parameters.                 */
  /*                                                                       */
  /*    parameters :: Additional parameters.                               */
  /*                                                                       */
  /* <Return>                                                              */
  /*    FreeType error code.  0~means success.                             */
  /*                                                                       */
  /* <Note>                                                                */
  /*    In case of success, the renderer will be used to convert glyph     */
  /*    images in the renderer's known format into bitmaps.                */
  /*                                                                       */
  /*    This doesn't change the current renderer for other formats.        */
  /*                                                                       */
  /*    Currently, no FreeType renderer module uses `parameters'; you      */
  /*    should thus always pass NULL as the value.                         */
  /*                                                                       */
  FT_EXPORT( FT_Error )
  FT_Set_Renderer( FT_Library     library,
                   FT_Renderer    renderer,
                   FT_UInt        num_params,
                   FT_Parameter*  parameters );

  /* */

FT_END_HEADER

#endif /* FTRENDER_H_ */

/* END */

repo_name: vaartis/netrunner

license: mit


code:
/***************************************************************************/
/*                                                                         */
/*  ftsizes.h                                                              */
/*                                                                         */
/*    FreeType size objects management (specification).                    */
/*                                                                         */
/*  Copyright 1996-2017 by                                                 */
/*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
/*                                                                         */
/*  This file is part of the FreeType project, and may only be used,       */
/*  modified, and distributed under the terms of the FreeType project      */
/*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */
/*  this file you indicate that you have read the license and              */
/*  understand and accept it fully.                                        */
/*                                                                         */
/***************************************************************************/

  /*************************************************************************/
  /*                                                                       */
  /* Typical application would normally not need to use these functions.   */
  /* However, they have been placed in a public API for the rare cases     */
  /* where they are needed.                                                */
  /*                                                                       */
  /*************************************************************************/

#ifndef FTSIZES_H_
#define FTSIZES_H_

#include <ft2build.h>
#include FT_FREETYPE_H

#ifdef FREETYPE_H
#error "freetype.h of FreeType 1 has been loaded!"
#error "Please fix the directory search order for header files"
#error "so that freetype.h of FreeType 2 is found first."
#endif

FT_BEGIN_HEADER

  /*************************************************************************/
  /*                                                                       */
  /* <Section>                                                             */
  /*    sizes_management                                                   */
  /*                                                                       */
  /* <Title>                                                               */
  /*    Size Management                                                    */
  /*                                                                       */
  /* <Abstract>                                                            */
  /*    Managing multiple sizes per face.                                  */
  /*                                                                       */
  /* <Description>                                                         */
  /*    When creating a new face object (e.g., with @FT_New_Face), an      */
  /*    @FT_Size object is automatically created and used to store all     */
  /*    pixel-size dependent information, available in the `face->size'    */
  /*    field.                                                             */
  /*                                                                       */
  /*    It is however possible to create more sizes for a given face,      */
  /*    mostly in order to manage several character pixel sizes of the     */
  /*    same font family and style.  See @FT_New_Size and @FT_Done_Size.   */
  /*                                                                       */
  /*    Note that @FT_Set_Pixel_Sizes and @FT_Set_Char_Size only           */
  /*    modify the contents of the current `active' size; you thus need    */
  /*    to use @FT_Activate_Size to change it.                             */
  /*                                                                       */
  /*    99% of applications won't need the functions provided here,        */
  /*    especially if they use the caching sub-system, so be cautious      */
  /*    when using these.                                                  */
  /*                                                                       */
  /*************************************************************************/

  /*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_New_Size                                                        */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Create a new size object from a given face object.                 */
  /*                                                                       */
  /* <Input>                                                               */
  /*    face :: A handle to a parent face object.                          */
  /*                                                                       */
  /* <Output>                                                              */
  /*    asize :: A handle to a new size object.                            */
  /*                                                                       */
  /* <Return>                                                              */
  /*    FreeType error code.  0~means success.                             */
  /*                                                                       */
  /* <Note>                                                                */
  /*    You need to call @FT_Activate_Size in order to select the new size */
  /*    for upcoming calls to @FT_Set_Pixel_Sizes, @FT_Set_Char_Size,      */
  /*    @FT_Load_Glyph, @FT_Load_Char, etc.                                */
  /*                                                                       */
  FT_EXPORT( FT_Error )
  FT_New_Size( FT_Face   face,
               FT_Size*  size );

  /*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_Done_Size                                                       */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Discard a given size object.  Note that @FT_Done_Face              */
  /*    automatically discards all size objects allocated with             */
  /*    @FT_New_Size.                                                      */
  /*                                                                       */
  /* <Input>                                                               */
  /*    size :: A handle to a target size object.                          */
  /*                                                                       */
  /* <Return>                                                              */
  /*    FreeType error code.  0~means success.                             */
  /*                                                                       */
  FT_EXPORT( FT_Error )
  FT_Done_Size( FT_Size  size );

  /*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_Activate_Size                                                   */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Even though it is possible to create several size objects for a    */
  /*    given face (see @FT_New_Size for details), functions like          */
  /*    @FT_Load_Glyph or @FT_Load_Char only use the one that has been     */
  /*    activated last to determine the `current character pixel size'.    */
  /*                                                                       */
  /*    This function can be used to `activate' a previously created size  */
  /*    object.                                                            */
  /*                                                                       */
  /* <Input>                                                               */
  /*    size :: A handle to a target size object.                          */
  /*                                                                       */
  /* <Return>                                                              */
  /*    FreeType error code.  0~means success.                             */
  /*                                                                       */
  /* <Note>                                                                */
  /*    If `face' is the size's parent face object, this function changes  */
  /*    the value of `face->size' to the input size handle.                */
  /*                                                                       */
  FT_EXPORT( FT_Error )
  FT_Activate_Size( FT_Size  size );

  /* */

FT_END_HEADER

#endif /* FTSIZES_H_ */

/* END */


code:
/***************************************************************************/
/*                                                                         */
/*  ftsnames.h                                                             */
/*                                                                         */
/*    Simple interface to access SFNT `name' tables (which are used        */
/*    to hold font names, copyright info, notices, etc.) (specification).  */
/*                                                                         */
/*    This is _not_ used to retrieve glyph names!                          */
/*                                                                         */
/*  Copyright 1996-2017 by                                                 */
/*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
/*                                                                         */
/*  This file is part of the FreeType project, and may only be used,       */
/*  modified, and distributed under the terms of the FreeType project      */
/*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */
/*  this file you indicate that you have read the license and              */
/*  understand and accept it fully.                                        */
/*                                                                         */
/***************************************************************************/

#ifndef FTSNAMES_H_
#define FTSNAMES_H_

#include <ft2build.h>
#include FT_FREETYPE_H

#ifdef FREETYPE_H
#error "freetype.h of FreeType 1 has been loaded!"
#error "Please fix the directory search order for header files"
#error "so that freetype.h of FreeType 2 is found first."
#endif

FT_BEGIN_HEADER

  /*************************************************************************/
  /*                                                                       */
  /* <Section>                                                             */
  /*    sfnt_names                                                         */
  /*                                                                       */
  /* <Title>                                                               */
  /*    SFNT Names                                                         */
  /*                                                                       */
  /* <Abstract>                                                            */
  /*    Access the names embedded in TrueType and OpenType files.          */
  /*                                                                       */
  /* <Description>                                                         */
  /*    The TrueType and OpenType specifications allow the inclusion of    */
  /*    a special names table (`name') in font files.  This table contains */
  /*    textual (and internationalized) information regarding the font,    */
  /*    like family name, copyright, version, etc.                         */
  /*                                                                       */
  /*    The definitions below are used to access them if available.        */
  /*                                                                       */
  /*    Note that this has nothing to do with glyph names!                 */
  /*                                                                       */
  /*************************************************************************/

  /*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    FT_SfntName                                                        */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A structure used to model an SFNT `name' table entry.              */
  /*                                                                       */
  /* <Fields>                                                              */
  /*    platform_id :: The platform ID for `string'.                       */
  /*                   See @TT_PLATFORM_XXX for possible values.           */
  /*                                                                       */
  /*    encoding_id :: The encoding ID for `string'.                       */
  /*                   See @TT_APPLE_ID_XXX, @TT_MAC_ID_XXX,               */
  /*                   @TT_ISO_ID_XXX, @TT_MS_ID_XXX, and @TT_ADOBE_ID_XXX */
  /*                   for possible values.                                */
  /*                                                                       */
  /*    language_id :: The language ID for `string'.                       */
  /*                   See @TT_MAC_LANGID_XXX and @TT_MS_LANGID_XXX for    */
  /*                   possible values.                                    */
  /*                                                                       */
  /*                   Registered OpenType values for `language_id' are    */
  /*                   always smaller than 0x8000; values equal or larger  */
  /*                   than 0x8000 usually indicate a language tag string  */
  /*                   (introduced in OpenType version 1.6).  Use function */
  /*                   @FT_Get_Sfnt_LangTag with `language_id' as its      */
  /*                   argument to retrieve the associated language tag.   */
  /*                                                                       */
  /*    name_id     :: An identifier for `string'.                         */
  /*                   See @TT_NAME_ID_XXX for possible values.            */
  /*                                                                       */
  /*    string      :: The `name' string.  Note that its format differs    */
  /*                   depending on the (platform,encoding) pair, being    */
  /*                   either a string of bytes (without a terminating     */
  /*                   NULL byte) or containing UTF-16BE entities.         */
  /*                                                                       */
  /*    string_len  :: The length of `string' in bytes.                    */
  /*                                                                       */
  /* <Note>                                                                */
  /*    Please refer to the TrueType or OpenType specification for more    */
  /*    details.                                                           */
  /*                                                                       */
  typedef struct  FT_SfntName_
  {
    FT_UShort  platform_id;
    FT_UShort  encoding_id;
    FT_UShort  language_id;
    FT_UShort  name_id;

    FT_Byte*   string;      /* this string is *not* null-terminated! */
    FT_UInt    string_len;  /* in bytes                              */

  } FT_SfntName;

  /*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_Get_Sfnt_Name_Count                                             */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Retrieve the number of name strings in the SFNT `name' table.      */
  /*                                                                       */
  /* <Input>                                                               */
  /*    face :: A handle to the source face.                               */
  /*                                                                       */
  /* <Return>                                                              */
  /*    The number of strings in the `name' table.                         */
  /*                                                                       */
  FT_EXPORT( FT_UInt )
  FT_Get_Sfnt_Name_Count( FT_Face  face );

  /*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_Get_Sfnt_Name                                                   */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Retrieve a string of the SFNT `name' table for a given index.      */
  /*                                                                       */
  /* <Input>                                                               */
  /*    face  :: A handle to the source face.                              */
  /*                                                                       */
  /*    idx   :: The index of the `name' string.                           */
  /*                                                                       */
  /* <Output>                                                              */
  /*    aname :: The indexed @FT_SfntName structure.                       */
  /*                                                                       */
  /* <Return>                                                              */
  /*    FreeType error code.  0~means success.                             */
  /*                                                                       */
  /* <Note>                                                                */
  /*    The `string' array returned in the `aname' structure is not        */
  /*    null-terminated.  Note that you don't have to deallocate `string'  */
  /*    by yourself; FreeType takes care of it if you call @FT_Done_Face.  */
  /*                                                                       */
  /*    Use @FT_Get_Sfnt_Name_Count to get the total number of available   */
  /*    `name' table entries, then do a loop until you get the right       */
  /*    platform, encoding, and name ID.                                   */
  /*                                                                       */
  /*    `name' table format~1 entries can use language tags also, see      */
  /*    @FT_Get_Sfnt_LangTag.                                              */
  /*                                                                       */
  FT_EXPORT( FT_Error )
  FT_Get_Sfnt_Name( FT_Face       face,
                    FT_UInt       idx,
                    FT_SfntName  *aname );

  /*************************************************************************/
  /*                                                                       */
  /* <Struct>                                                              */
  /*    FT_SfntLangTag                                                     */
  /*                                                                       */
  /* <Description>                                                         */
  /*    A structure to model a language tag entry from an SFNT `name'      */
  /*    table.                                                             */
  /*                                                                       */
  /* <Fields>                                                              */
  /*    string      :: The language tag string, encoded in UTF-16BE        */
  /*                   (without trailing NULL bytes).                      */
  /*                                                                       */
  /*    string_len  :: The length of `string' in *bytes*.                  */
  /*                                                                       */
  /* <Note>                                                                */
  /*    Please refer to the TrueType or OpenType specification for more    */
  /*    details.                                                           */
  /*                                                                       */
  typedef struct  FT_SfntLangTag_
  {
    FT_Byte*  string;      /* this string is *not* null-terminated! */
    FT_UInt   string_len;  /* in bytes                              */

  } FT_SfntLangTag;

  /*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    FT_Get_Sfnt_LangTag                                                */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Retrieve the language tag associated with a language ID of an SFNT */
  /*    `name' table entry.                                                */
  /*                                                                       */
  /* <Input>                                                               */
  /*    face     :: A handle to the source face.                           */
  /*                                                                       */
  /*    langID   :: The language ID, as returned by @FT_Get_Sfnt_Name.     */
  /*                This is always a value larger than 0x8000.             */
  /*                                                                       */
  /* <Output>                                                              */
  /*    alangTag :: The language tag associated with the `name' table      */
  /*                entry's language ID.                                   */
  /*                                                                       */
  /* <Return>                                                              */
  /*    FreeType error code.  0~means success.                             */
  /*                                                                       */
  /* <Note>                                                                */
  /*    The `string' array returned in the `alangTag' structure is not     */
  /*    null-terminated.  Note that you don't have to deallocate `string'  */
  /*    by yourself; FreeType takes care of it if you call @FT_Done_Face.  */
  /*                                                                       */
  /*    Only `name' table format~1 supports language tags.  For format~0   */
  /*    tables, this function always returns FT_Err_Invalid_Table.  For    */
  /*    invalid format~1 language ID values, FT_Err_Invalid_Argument is    */
  /*    returned.                                                          */
  /*                                                                       */
  FT_EXPORT( FT_Error )
  FT_Get_Sfnt_LangTag( FT_Face          face,
                       FT_UInt          langID,
                       FT_SfntLangTag  *alangTag );

  /***************************************************************************
   *
   * @constant:
   *   FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_FAMILY
   *
   * @description:
   *   A tag for @FT_Parameter to make @FT_Open_Face ignore typographic
   *   family names in the `name' table (introduced in OpenType version
   *   1.4).  Use this for backward compatibility with legacy systems that
   *   have a four-faces-per-family restriction.
   *
   */
#define FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_FAMILY \
          FT_MAKE_TAG( 'i', 'g', 'p', 'f' )

  /* this constant is deprecated */
#define FT_PARAM_TAG_IGNORE_PREFERRED_FAMILY \
          FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_FAMILY

  /***************************************************************************
   *
   * @constant:
   *   FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_SUBFAMILY
   *
   * @description:
   *   A tag for @FT_Parameter to make @FT_Open_Face ignore typographic
   *   subfamily names in the `name' table (introduced in OpenType version
   *   1.4).  Use this for backward compatibility with legacy systems that
   *   have a four-faces-per-family restriction.
   *
   */
#define FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_SUBFAMILY \
          FT_MAKE_TAG( 'i', 'g', 'p', 's' )

  /* this constant is deprecated */
#define FT_PARAM_TAG_IGNORE_PREFERRED_SUBFAMILY \
          FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_SUBFAMILY

  /* */

FT_END_HEADER

#endif /* FTSNAMES_H_ */

/* END */


code:
/***************************************************************************/
/*                                                                         */
/*  ftstroke.h                                                             */
/*                                                                         */
/*    FreeType path stroker (specification).                               */
/*                                                                         */
/*  Copyright 2002-2017 by                                                 */
/*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
/*                                                                         */
/*  This file is part of the FreeType project, and may only be used,       */
/*  modified, and distributed under the terms of the FreeType project      */
/*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */
/*  this file you indicate that you have read the license and              */
/*  understand and accept it fully.                                        */
/*                                                                         */
/***************************************************************************/

#ifndef FTSTROKE_H_
#define FTSTROKE_H_

#include <ft2build.h>
#include FT_OUTLINE_H
#include FT_GLYPH_H

FT_BEGIN_HEADER

 /************************************************************************
  *
  * @section:
  *    glyph_stroker
  *
  * @title:
  *    Glyph Stroker
  *
  * @abstract:
  *    Generating bordered and stroked glyphs.
  *
  * @description:
  *    This component generates stroked outlines of a given vectorial
  *    glyph.  It also allows you to retrieve the `outside' and/or the
  *    `inside' borders of the stroke.
  *
  *    This can be useful to generate `bordered' glyph, i.e., glyphs
  *    displayed with a coloured (and anti-aliased) border around their
  *    shape.
  *
  * @order:
  *    FT_Stroker
  *
  *    FT_Stroker_LineJoin
  *    FT_Stroker_LineCap
  *    FT_StrokerBorder
  *
  *    FT_Outline_GetInsideBorder
  *    FT_Outline_GetOutsideBorder
  *
  *    FT_Glyph_Stroke
  *    FT_Glyph_StrokeBorder
  *
  *    FT_Stroker_New
  *    FT_Stroker_Set
  *    FT_Stroker_Rewind
  *    FT_Stroker_ParseOutline
  *    FT_Stroker_Done
  *
  *    FT_Stroker_BeginSubPath
  *    FT_Stroker_EndSubPath
  *
  *    FT_Stroker_LineTo
  *    FT_Stroker_ConicTo
  *    FT_Stroker_CubicTo
  *
  *    FT_Stroker_GetBorderCounts
  *    FT_Stroker_ExportBorder
  *    FT_Stroker_GetCounts
  *    FT_Stroker_Export
  *
  */

 /**************************************************************
  *
  * @type:
  *   FT_Stroker
  *
  * @description:
  *   Opaque handle to a path stroker object.
  */
  typedef struct FT_StrokerRec_*  FT_Stroker;

  /**************************************************************
   *
   * @enum:
   *   FT_Stroker_LineJoin
   *
   * @description:
   *   These values determine how two joining lines are rendered
   *   in a stroker.
   *
   * @values:
   *   FT_STROKER_LINEJOIN_ROUND ::
   *     Used to render rounded line joins.  Circular arcs are used
   *     to join two lines smoothly.
   *
   *   FT_STROKER_LINEJOIN_BEVEL ::
   *     Used to render beveled line joins.  The outer corner of
   *     the joined lines is filled by enclosing the triangular
   *     region of the corner with a straight line between the
   *     outer corners of each stroke.
   *
   *   FT_STROKER_LINEJOIN_MITER_FIXED ::
   *     Used to render mitered line joins, with fixed bevels if the
   *     miter limit is exceeded.  The outer edges of the strokes
   *     for the two segments are extended until they meet at an
   *     angle.  If the segments meet at too sharp an angle (such
   *     that the miter would extend from the intersection of the
   *     segments a distance greater than the product of the miter
   *     limit value and the border radius), then a bevel join (see
   *     above) is used instead.  This prevents long spikes being
   *     created.  FT_STROKER_LINEJOIN_MITER_FIXED generates a miter
   *     line join as used in PostScript and PDF.
   *
   *   FT_STROKER_LINEJOIN_MITER_VARIABLE ::
   *   FT_STROKER_LINEJOIN_MITER ::
   *     Used to render mitered line joins, with variable bevels if
   *     the miter limit is exceeded.  The intersection of the
   *     strokes is clipped at a line perpendicular to the bisector
   *     of the angle between the strokes, at the distance from the
   *     intersection of the segments equal to the product of the
   *     miter limit value and the border radius.  This prevents
   *     long spikes being created.
   *     FT_STROKER_LINEJOIN_MITER_VARIABLE generates a mitered line
   *     join as used in XPS.  FT_STROKER_LINEJOIN_MITER is an alias
   *     for FT_STROKER_LINEJOIN_MITER_VARIABLE, retained for
   *     backward compatibility.
   */
  typedef enum  FT_Stroker_LineJoin_
  {
    FT_STROKER_LINEJOIN_ROUND          = 0,
    FT_STROKER_LINEJOIN_BEVEL          = 1,
    FT_STROKER_LINEJOIN_MITER_VARIABLE = 2,
    FT_STROKER_LINEJOIN_MITER          = FT_STROKER_LINEJOIN_MITER_VARIABLE,
    FT_STROKER_LINEJOIN_MITER_FIXED    = 3

  } FT_Stroker_LineJoin;

  /**************************************************************
   *
   * @enum:
   *   FT_Stroker_LineCap
   *
   * @description:
   *   These values determine how the end of opened sub-paths are
   *   rendered in a stroke.
   *
   * @values:
   *   FT_STROKER_LINECAP_BUTT ::
   *     The end of lines is rendered as a full stop on the last
   *     point itself.
   *
   *   FT_STROKER_LINECAP_ROUND ::
   *     The end of lines is rendered as a half-circle around the
   *     last point.
   *
   *   FT_STROKER_LINECAP_SQUARE ::
   *     The end of lines is rendered as a square around the
   *     last point.
   */
  typedef enum  FT_Stroker_LineCap_
  {
    FT_STROKER_LINECAP_BUTT = 0,
    FT_STROKER_LINECAP_ROUND,
    FT_STROKER_LINECAP_SQUARE

  } FT_Stroker_LineCap;

  /**************************************************************
   *
   * @enum:
   *   FT_StrokerBorder
   *
   * @description:
   *   These values are used to select a given stroke border
   *   in @FT_Stroker_GetBorderCounts and @FT_Stroker_ExportBorder.
   *
   * @values:
   *   FT_STROKER_BORDER_LEFT ::
   *     Select the left border, relative to the drawing direction.
   *
   *   FT_STROKER_BORDER_RIGHT ::
   *     Select the right border, relative to the drawing direction.
   *
   * @note:
   *   Applications are generally interested in the `inside' and `outside'
   *   borders.  However, there is no direct mapping between these and the
   *   `left' and `right' ones, since this really depends on the glyph's
   *   drawing orientation, which varies between font formats.
   *
   *   You can however use @FT_Outline_GetInsideBorder and
   *   @FT_Outline_GetOutsideBorder to get these.
   */
  typedef enum  FT_StrokerBorder_
  {
    FT_STROKER_BORDER_LEFT = 0,
    FT_STROKER_BORDER_RIGHT

  } FT_StrokerBorder;

  /**************************************************************
   *
   * @function:
   *   FT_Outline_GetInsideBorder
   *
   * @description:
   *   Retrieve the @FT_StrokerBorder value corresponding to the
   *   `inside' borders of a given outline.
   *
   * @input:
   *   outline ::
   *     The source outline handle.
   *
   * @return:
   *   The border index.  @FT_STROKER_BORDER_RIGHT for empty or invalid
   *   outlines.
   */
  FT_EXPORT( FT_StrokerBorder )
  FT_Outline_GetInsideBorder( FT_Outline*  outline );

  /**************************************************************
   *
   * @function:
   *   FT_Outline_GetOutsideBorder
   *
   * @description:
   *   Retrieve the @FT_StrokerBorder value corresponding to the
   *   `outside' borders of a given outline.
   *
   * @input:
   *   outline ::
   *     The source outline handle.
   *
   * @return:
   *   The border index.  @FT_STROKER_BORDER_LEFT for empty or invalid
   *   outlines.
   */
  FT_EXPORT( FT_StrokerBorder )
  FT_Outline_GetOutsideBorder( FT_Outline*  outline );

  /**************************************************************
   *
   * @function:
   *   FT_Stroker_New
   *
   * @description:
   *   Create a new stroker object.
   *
   * @input:
   *   library ::
   *     FreeType library handle.
   *
   * @output:
   *   astroker ::
   *     A new stroker object handle.  NULL in case of error.
   *
   * @return:
   *    FreeType error code.  0~means success.
   */
  FT_EXPORT( FT_Error )
  FT_Stroker_New( FT_Library   library,
                  FT_Stroker  *astroker );

  /**************************************************************
   *
   * @function:
   *   FT_Stroker_Set
   *
   * @description:
   *   Reset a stroker object's attributes.
   *
   * @input:
   *   stroker ::
   *     The target stroker handle.
   *
   *   radius ::
   *     The border radius.
   *
   *   line_cap ::
   *     The line cap style.
   *
   *   line_join ::
   *     The line join style.
   *
   *   miter_limit ::
   *     The miter limit for the FT_STROKER_LINEJOIN_MITER_FIXED and
   *     FT_STROKER_LINEJOIN_MITER_VARIABLE line join styles,
   *     expressed as 16.16 fixed-point value.
   *
   * @note:
   *   The radius is expressed in the same units as the outline
   *   coordinates.
   *
   *   This function calls @FT_Stroker_Rewind automatically.
   */
  FT_EXPORT( void )
  FT_Stroker_Set( FT_Stroker           stroker,
                  FT_Fixed             radius,
                  FT_Stroker_LineCap   line_cap,
                  FT_Stroker_LineJoin  line_join,
                  FT_Fixed             miter_limit );

  /**************************************************************
   *
   * @function:
   *   FT_Stroker_Rewind
   *
   * @description:
   *   Reset a stroker object without changing its attributes.
   *   You should call this function before beginning a new
   *   series of calls to @FT_Stroker_BeginSubPath or
   *   @FT_Stroker_EndSubPath.
   *
   * @input:
   *   stroker ::
   *     The target stroker handle.
   */
  FT_EXPORT( void )
  FT_Stroker_Rewind( FT_Stroker  stroker );

  /**************************************************************
   *
   * @function:
   *   FT_Stroker_ParseOutline
   *
   * @description:
   *   A convenience function used to parse a whole outline with
   *   the stroker.  The resulting outline(s) can be retrieved
   *   later by functions like @FT_Stroker_GetCounts and @FT_Stroker_Export.
   *
   * @input:
   *   stroker ::
   *     The target stroker handle.
   *
   *   outline ::
   *     The source outline.
   *
   *   opened ::
   *     A boolean.  If~1, the outline is treated as an open path instead
   *     of a closed one.
   *
   * @return:
   *   FreeType error code.  0~means success.
   *
   * @note:
   *   If `opened' is~0 (the default), the outline is treated as a closed
   *   path, and the stroker generates two distinct `border' outlines.
   *
   *   If `opened' is~1, the outline is processed as an open path, and the
   *   stroker generates a single `stroke' outline.
   *
   *   This function calls @FT_Stroker_Rewind automatically.
   */
  FT_EXPORT( FT_Error )
  FT_Stroker_ParseOutline( FT_Stroker   stroker,
                           FT_Outline*  outline,
                           FT_Bool      opened );

  /**************************************************************
   *
   * @function:
   *   FT_Stroker_BeginSubPath
   *
   * @description:
   *   Start a new sub-path in the stroker.
   *
   * @input:
   *   stroker ::
   *     The target stroker handle.
   *
   *   to ::
   *     A pointer to the start vector.
   *
   *   open ::
   *     A boolean.  If~1, the sub-path is treated as an open one.
   *
   * @return:
   *   FreeType error code.  0~means success.
   *
   * @note:
   *   This function is useful when you need to stroke a path that is
   *   not stored as an @FT_Outline object.
   */
  FT_EXPORT( FT_Error )
  FT_Stroker_BeginSubPath( FT_Stroker  stroker,
                           FT_Vector*  to,
                           FT_Bool     open );

  /**************************************************************
   *
   * @function:
   *   FT_Stroker_EndSubPath
   *
   * @description:
   *   Close the current sub-path in the stroker.
   *
   * @input:
   *   stroker ::
   *     The target stroker handle.
   *
   * @return:
   *   FreeType error code.  0~means success.
   *
   * @note:
   *   You should call this function after @FT_Stroker_BeginSubPath.
   *   If the subpath was not `opened', this function `draws' a
   *   single line segment to the start position when needed.
   */
  FT_EXPORT( FT_Error )
  FT_Stroker_EndSubPath( FT_Stroker  stroker );

  /**************************************************************
   *
   * @function:
   *   FT_Stroker_LineTo
   *
   * @description:
   *   `Draw' a single line segment in the stroker's current sub-path,
   *   from the last position.
   *
   * @input:
   *   stroker ::
   *     The target stroker handle.
   *
   *   to ::
   *     A pointer to the destination point.
   *
   * @return:
   *   FreeType error code.  0~means success.
   *
   * @note:
   *   You should call this function between @FT_Stroker_BeginSubPath and
   *   @FT_Stroker_EndSubPath.
   */
  FT_EXPORT( FT_Error )
  FT_Stroker_LineTo( FT_Stroker  stroker,
                     FT_Vector*  to );

  /**************************************************************
   *
   * @function:
   *   FT_Stroker_ConicTo
   *
   * @description:
   *   `Draw' a single quadratic Bézier in the stroker's current sub-path,
   *   from the last position.
   *
   * @input:
   *   stroker ::
   *     The target stroker handle.
   *
   *   control ::
   *     A pointer to a Bézier control point.
   *
   *   to ::
   *     A pointer to the destination point.
   *
   * @return:
   *   FreeType error code.  0~means success.
   *
   * @note:
   *   You should call this function between @FT_Stroker_BeginSubPath and
   *   @FT_Stroker_EndSubPath.
   */
  FT_EXPORT( FT_Error )
  FT_Stroker_ConicTo( FT_Stroker  stroker,
                      FT_Vector*  control,
                      FT_Vector*  to );

  /**************************************************************
   *
   * @function:
   *   FT_Stroker_CubicTo
   *
   * @description:
   *   `Draw' a single cubic Bézier in the stroker's current sub-path,
   *   from the last position.
   *
   * @input:
   *   stroker ::
   *     The target stroker handle.
   *
   *   control1 ::
   *     A pointer to the first Bézier control point.
   *
   *   control2 ::
   *     A pointer to second Bézier control point.
   *
   *   to ::
   *     A pointer to the destination point.
   *
   * @return:
   *   FreeType error code.  0~means success.
   *
   * @note:
   *   You should call this function between @FT_Stroker_BeginSubPath and
   *   @FT_Stroker_EndSubPath.
   */
  FT_EXPORT( FT_Error )
  FT_Stroker_CubicTo( FT_Stroker  stroker,
                      FT_Vector*  control1,
                      FT_Vector*  control2,
                      FT_Vector*  to );

  /**************************************************************
   *
   * @function:
   *   FT_Stroker_GetBorderCounts
   *
   * @description:
   *   Call this function once you have finished parsing your paths
   *   with the stroker.  It returns the number of points and
   *   contours necessary to export one of the `border' or `stroke'
   *   outlines generated by the stroker.
   *
   * @input:
   *   stroker ::
   *     The target stroker handle.
   *
   *   border ::
   *     The border index.
   *
   * @output:
   *   anum_points ::
   *     The number of points.
   *
   *   anum_contours ::
   *     The number of contours.
   *
   * @return:
   *   FreeType error code.  0~means success.
   *
   * @note:
   *   When an outline, or a sub-path, is `closed', the stroker generates
   *   two independent `border' outlines, named `left' and `right'.
   *
   *   When the outline, or a sub-path, is `opened', the stroker merges
   *   the `border' outlines with caps.  The `left' border receives all
   *   points, while the `right' border becomes empty.
   *
   *   Use the function @FT_Stroker_GetCounts instead if you want to
   *   retrieve the counts associated to both borders.
   */
  FT_EXPORT( FT_Error )
  FT_Stroker_GetBorderCounts( FT_Stroker        stroker,
                              FT_StrokerBorder  border,
                              FT_UInt          *anum_points,
                              FT_UInt          *anum_contours );

  /**************************************************************
   *
   * @function:
   *   FT_Stroker_ExportBorder
   *
   * @description:
   *   Call this function after @FT_Stroker_GetBorderCounts to
   *   export the corresponding border to your own @FT_Outline
   *   structure.
   *
   *   Note that this function appends the border points and
   *   contours to your outline, but does not try to resize its
   *   arrays.
   *
   * @input:
   *   stroker ::
   *     The target stroker handle.
   *
   *   border ::
   *     The border index.
   *
   *   outline ::
   *     The target outline handle.
   *
   * @note:
   *   Always call this function after @FT_Stroker_GetBorderCounts to
   *   get sure that there is enough room in your @FT_Outline object to
   *   receive all new data.
   *
   *   When an outline, or a sub-path, is `closed', the stroker generates
   *   two independent `border' outlines, named `left' and `right'.
   *
   *   When the outline, or a sub-path, is `opened', the stroker merges
   *   the `border' outlines with caps.  The `left' border receives all
   *   points, while the `right' border becomes empty.
   *
   *   Use the function @FT_Stroker_Export instead if you want to
   *   retrieve all borders at once.
   */
  FT_EXPORT( void )
  FT_Stroker_ExportBorder( FT_Stroker        stroker,
                           FT_StrokerBorder  border,
                           FT_Outline*       outline );

  /**************************************************************
   *
   * @function:
   *   FT_Stroker_GetCounts
   *
   * @description:
   *   Call this function once you have finished parsing your paths
   *   with the stroker.  It returns the number of points and
   *   contours necessary to export all points/borders from the stroked
   *   outline/path.
   *
   * @input:
   *   stroker ::
   *     The target stroker handle.
   *
   * @output:
   *   anum_points ::
   *     The number of points.
   *
   *   anum_contours ::
   *     The number of contours.
   *
   * @return:
   *   FreeType error code.  0~means success.
   */
  FT_EXPORT( FT_Error )
  FT_Stroker_GetCounts( FT_Stroker  stroker,
                        FT_UInt    *anum_points,
                        FT_UInt    *anum_contours );

  /**************************************************************
   *
   * @function:
   *   FT_Stroker_Export
   *
   * @description:
   *   Call this function after @FT_Stroker_GetBorderCounts to
   *   export all borders to your own @FT_Outline structure.
   *
   *   Note that this function appends the border points and
   *   contours to your outline, but does not try to resize its
   *   arrays.
   *
   * @input:
   *   stroker ::
   *     The target stroker handle.
   *
   *   outline ::
   *     The target outline handle.
   */
  FT_EXPORT( void )
  FT_Stroker_Export( FT_Stroker   stroker,
                     FT_Outline*  outline );

  /**************************************************************
   *
   * @function:
   *   FT_Stroker_Done
   *
   * @description:
   *   Destroy a stroker object.
   *
   * @input:
   *   stroker ::
   *     A stroker handle.  Can be NULL.
   */
  FT_EXPORT( void )
  FT_Stroker_Done( FT_Stroker  stroker );

  /**************************************************************
   *
   * @function:
   *   FT_Glyph_Stroke
   *
   * @description:
   *   Stroke a given outline glyph object with a given stroker.
   *
   * @inout:
   *   pglyph ::
   *     Source glyph handle on input, new glyph handle on output.
   *
   * @input:
   *   stroker ::
   *     A stroker handle.
   *
   *   destroy ::
   *     A Boolean.  If~1, the source glyph object is destroyed
   *     on success.
   *
   * @return:
   *    FreeType error code.  0~means success.
   *
   * @note:
   *   The source glyph is untouched in case of error.
   *
   *   Adding stroke may yield a significantly wider and taller glyph
   *   depending on how large of a radius was used to stroke the glyph.  You
   *   may need to manually adjust horizontal and vertical advance amounts
   *   to account for this added size.
   */
  FT_EXPORT( FT_Error )
  FT_Glyph_Stroke( FT_Glyph    *pglyph,
                   FT_Stroker   stroker,
                   FT_Bool      destroy );

  /**************************************************************
   *
   * @function:
   *   FT_Glyph_StrokeBorder
   *
   * @description:
   *   Stroke a given outline glyph object with a given stroker, but
   *   only return either its inside or outside border.
   *
   * @inout:
   *   pglyph ::
   *     Source glyph handle on input, new glyph handle on output.
   *
   * @input:
   *   stroker ::
   *     A stroker handle.
   *
   *   inside ::
   *     A Boolean.  If~1, return the inside border, otherwise
   *     the outside border.
   *
   *   destroy ::
   *     A Boolean.  If~1, the source glyph object is destroyed
   *     on success.
   *
   * @return:
   *    FreeType error code.  0~means success.
   *
   * @note:
   *   The source glyph is untouched in case of error.
   *
   *   Adding stroke may yield a significantly wider and taller glyph
   *   depending on how large of a radius was used to stroke the glyph.  You
   *   may need to manually adjust horizontal and vertical advance amounts
   *   to account for this added size.
   */
  FT_EXPORT( FT_Error )
  FT_Glyph_StrokeBorder( FT_Glyph    *pglyph,
                         FT_Stroker   stroker,
                         FT_Bool      inside,
                         FT_Bool      destroy );

  /* */

FT_END_HEADER

#endif /* FTSTROKE_H_ */

/* END */

/* Local Variables: */
/* coding: utf-8    */
/* End:             */


code:
/***************************************************************************/
/*                                                                         */
/*  ftsystem.h                                                             */
/*                                                                         */
/*    FreeType low-level system interface definition (specification).      */
/*                                                                         */
/*  Copyright 1996-2017 by                                                 */
/*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
/*                                                                         */
/*  This file is part of the FreeType project, and may only be used,       */
/*  modified, and distributed under the terms of the FreeType project      */
/*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */
/*  this file you indicate that you have read the license and              */
/*  understand and accept it fully.                                        */
/*                                                                         */
/***************************************************************************/

#ifndef FTSYSTEM_H_
#define FTSYSTEM_H_

#include <ft2build.h>

FT_BEGIN_HEADER

  /*************************************************************************/
  /*                                                                       */
  /* <Section>                                                             */
  /*   system_interface                                                    */
  /*                                                                       */
  /* <Title>                                                               */
  /*   System Interface                                                    */
  /*                                                                       */
  /* <Abstract>                                                            */
  /*   How FreeType manages memory and i/o.                                */
  /*                                                                       */
  /* <Description>                                                         */
  /*   This section contains various definitions related to memory         */
  /*   management and i/o access.  You need to understand this             */
  /*   information if you want to use a custom memory manager or you own   */
  /*   i/o streams.                                                        */
  /*                                                                       */
  /*************************************************************************/

  /*************************************************************************/
  /*                                                                       */
  /*                  M E M O R Y   M A N A G E M E N T                    */
  /*                                                                       */
  /*************************************************************************/

  /*************************************************************************
   *
   * @type:
   *   FT_Memory
   *
   * @description:
   *   A handle to a given memory manager object, defined with an
   *   @FT_MemoryRec structure.
   *
   */
  typedef struct FT_MemoryRec_*  FT_Memory;

  /*************************************************************************
   *
   * @functype:
   *   FT_Alloc_Func
   *
   * @description:
   *   A function used to allocate `size' bytes from `memory'.
   *
   * @input:
   *   memory ::
   *     A handle to the source memory manager.
   *
   *   size ::
   *     The size in bytes to allocate.
   *
   * @return:
   *   Address of new memory block.  0~in case of failure.
   *
   */
  typedef void*
  (*FT_Alloc_Func)( FT_Memory  memory,
                    long       size );

  /*************************************************************************
   *
   * @functype:
   *   FT_Free_Func
   *
   * @description:
   *   A function used to release a given block of memory.
   *
   * @input:
   *   memory ::
   *     A handle to the source memory manager.
   *
   *   block ::
   *     The address of the target memory block.
   *
   */
  typedef void
  (*FT_Free_Func)( FT_Memory  memory,
                   void*      block );

  /*************************************************************************
   *
   * @functype:
   *   FT_Realloc_Func
   *
   * @description:
   *   A function used to re-allocate a given block of memory.
   *
   * @input:
   *   memory ::
   *     A handle to the source memory manager.
   *
   *   cur_size ::
   *     The block's current size in bytes.
   *
   *   new_size ::
   *     The block's requested new size.
   *
   *   block ::
   *     The block's current address.
   *
   * @return:
   *   New block address.  0~in case of memory shortage.
   *
   * @note:
   *   In case of error, the old block must still be available.
   *
   */
  typedef void*
  (*FT_Realloc_Func)( FT_Memory  memory,
                      long       cur_size,
                      long       new_size,
                      void*      block );

  /*************************************************************************
   *
   * @struct:
   *   FT_MemoryRec
   *
   * @description:
   *   A structure used to describe a given memory manager to FreeType~2.
   *
   * @fields:
   *   user ::
   *     A generic typeless pointer for user data.
   *
   *   alloc ::
   *     A pointer type to an allocation function.
   *
   *   free ::
   *     A pointer type to an memory freeing function.
   *
   *   realloc ::
   *     A pointer type to a reallocation function.
   *
   */
  struct  FT_MemoryRec_
  {
    void*            user;
    FT_Alloc_Func    alloc;
    FT_Free_Func     free;
    FT_Realloc_Func  realloc;
  };

  /*************************************************************************/
  /*                                                                       */
  /*                       I / O   M A N A G E M E N T                     */
  /*                                                                       */
  /*************************************************************************/

  /*************************************************************************
   *
   * @type:
   *   FT_Stream
   *
   * @description:
   *   A handle to an input stream.
   *
   * @also:
   *   See @FT_StreamRec for the publicly accessible fields of a given
   *   stream object.
   *
   */
  typedef struct FT_StreamRec_*  FT_Stream;

  /*************************************************************************
   *
   * @struct:
   *   FT_StreamDesc
   *
   * @description:
   *   A union type used to store either a long or a pointer.  This is used
   *   to store a file descriptor or a `FILE*' in an input stream.
   *
   */
  typedef union  FT_StreamDesc_
  {
    long   value;
    void*  pointer;

  } FT_StreamDesc;

  /*************************************************************************
   *
   * @functype:
   *   FT_Stream_IoFunc
   *
   * @description:
   *   A function used to seek and read data from a given input stream.
   *
   * @input:
   *   stream ::
   *     A handle to the source stream.
   *
   *   offset ::
   *     The offset of read in stream (always from start).
   *
   *   buffer ::
   *     The address of the read buffer.
   *
   *   count ::
   *     The number of bytes to read from the stream.
   *
   * @return:
   *   The number of bytes effectively read by the stream.
   *
   * @note:
   *   This function might be called to perform a seek or skip operation
   *   with a `count' of~0.  A non-zero return value then indicates an
   *   error.
   *
   */
  typedef unsigned long
  (*FT_Stream_IoFunc)( FT_Stream       stream,
                       unsigned long   offset,
                       unsigned char*  buffer,
                       unsigned long   count );

  /*************************************************************************
   *
   * @functype:
   *   FT_Stream_CloseFunc
   *
   * @description:
   *   A function used to close a given input stream.
   *
   * @input:
   *  stream ::
   *     A handle to the target stream.
   *
   */
  typedef void
  (*FT_Stream_CloseFunc)( FT_Stream  stream );

  /*************************************************************************
   *
   * @struct:
   *   FT_StreamRec
   *
   * @description:
   *   A structure used to describe an input stream.
   *
   * @input:
   *   base ::
   *     For memory-based streams, this is the address of the first stream
   *     byte in memory.  This field should always be set to NULL for
   *     disk-based streams.
   *
   *   size ::
   *     The stream size in bytes.
   *
   *     In case of compressed streams where the size is unknown before
   *     actually doing the decompression, the value is set to 0x7FFFFFFF.
   *     (Note that this size value can occur for normal streams also; it is
   *     thus just a hint.)
   *
   *   pos ::
   *     The current position within the stream.
   *
   *   descriptor ::
   *     This field is a union that can hold an integer or a pointer.  It is
   *     used by stream implementations to store file descriptors or `FILE*'
   *     pointers.
   *
   *   pathname ::
   *     This field is completely ignored by FreeType.  However, it is often
   *     useful during debugging to use it to store the stream's filename
   *     (where available).
   *
   *   read ::
   *     The stream's input function.
   *
   *   close ::
   *     The stream's close function.
   *
   *   memory ::
   *     The memory manager to use to preload frames.  This is set
   *     internally by FreeType and shouldn't be touched by stream
   *     implementations.
   *
   *   cursor ::
   *     This field is set and used internally by FreeType when parsing
   *     frames.
   *
   *   limit ::
   *     This field is set and used internally by FreeType when parsing
   *     frames.
   *
   */
  typedef struct  FT_StreamRec_
  {
    unsigned char*       base;
    unsigned long        size;
    unsigned long        pos;

    FT_StreamDesc        descriptor;
    FT_StreamDesc        pathname;
    FT_Stream_IoFunc     read;
    FT_Stream_CloseFunc  close;

    FT_Memory            memory;
    unsigned char*       cursor;
    unsigned char*       limit;

  } FT_StreamRec;

  /* */

FT_END_HEADER

#endif /* FTSYSTEM_H_ */

/* END */


code:
/***************************************************************************/
/*                                                                         */
/*  fttrigon.h                                                             */
/*                                                                         */
/*    FreeType trigonometric functions (specification).                    */
/*                                                                         */
/*  Copyright 2001-2017 by                                                 */
/*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
/*                                                                         */
/*  This file is part of the FreeType project, and may only be used,       */
/*  modified, and distributed under the terms of the FreeType project      */
/*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */
/*  this file you indicate that you have read the license and              */
/*  understand and accept it fully.                                        */
/*                                                                         */
/***************************************************************************/

#ifndef FTTRIGON_H_
#define FTTRIGON_H_

#include FT_FREETYPE_H

#ifdef FREETYPE_H
#error "freetype.h of FreeType 1 has been loaded!"
#error "Please fix the directory search order for header files"
#error "so that freetype.h of FreeType 2 is found first."
#endif

FT_BEGIN_HEADER

  /*************************************************************************/
  /*                                                                       */
  /* <Section>                                                             */
  /*   computations                                                        */
  /*                                                                       */
  /*************************************************************************/

  /*************************************************************************
   *
   * @type:
   *   FT_Angle
   *
   * @description:
   *   This type is used to model angle values in FreeType.  Note that the
   *   angle is a 16.16 fixed-point value expressed in degrees.
   *
   */
  typedef FT_Fixed  FT_Angle;

  /*************************************************************************
   *
   * @macro:
   *   FT_ANGLE_PI
   *
   * @description:
   *   The angle pi expressed in @FT_Angle units.
   *
   */
#define FT_ANGLE_PI  ( 180L << 16 )

  /*************************************************************************
   *
   * @macro:
   *   FT_ANGLE_2PI
   *
   * @description:
   *   The angle 2*pi expressed in @FT_Angle units.
   *
   */
#define FT_ANGLE_2PI  ( FT_ANGLE_PI * 2 )

  /*************************************************************************
   *
   * @macro:
   *   FT_ANGLE_PI2
   *
   * @description:
   *   The angle pi/2 expressed in @FT_Angle units.
   *
   */
#define FT_ANGLE_PI2  ( FT_ANGLE_PI / 2 )

  /*************************************************************************
   *
   * @macro:
   *   FT_ANGLE_PI4
   *
   * @description:
   *   The angle pi/4 expressed in @FT_Angle units.
   *
   */
#define FT_ANGLE_PI4  ( FT_ANGLE_PI / 4 )

  /*************************************************************************
   *
   * @function:
   *   FT_Sin
   *
   * @description:
   *   Return the sinus of a given angle in fixed-point format.
   *
   * @input:
   *   angle ::
   *     The input angle.
   *
   * @return:
   *   The sinus value.
   *
   * @note:
   *   If you need both the sinus and cosinus for a given angle, use the
   *   function @FT_Vector_Unit.
   *
   */
  FT_EXPORT( FT_Fixed )
  FT_Sin( FT_Angle  angle );

  /*************************************************************************
   *
   * @function:
   *   FT_Cos
   *
   * @description:
   *   Return the cosinus of a given angle in fixed-point format.
   *
   * @input:
   *   angle ::
   *     The input angle.
   *
   * @return:
   *   The cosinus value.
   *
   * @note:
   *   If you need both the sinus and cosinus for a given angle, use the
   *   function @FT_Vector_Unit.
   *
   */
  FT_EXPORT( FT_Fixed )
  FT_Cos( FT_Angle  angle );

  /*************************************************************************
   *
   * @function:
   *   FT_Tan
   *
   * @description:
   *   Return the tangent of a given angle in fixed-point format.
   *
   * @input:
   *   angle ::
   *     The input angle.
   *
   * @return:
   *   The tangent value.
   *
   */
  FT_EXPORT( FT_Fixed )
  FT_Tan( FT_Angle  angle );

  /*************************************************************************
   *
   * @function:
   *   FT_Atan2
   *
   * @description:
   *   Return the arc-tangent corresponding to a given vector (x,y) in
   *   the 2d plane.
   *
   * @input:
   *   x ::
   *     The horizontal vector coordinate.
   *
   *   y ::
   *     The vertical vector coordinate.
   *
   * @return:
   *   The arc-tangent value (i.e. angle).
   *
   */
  FT_EXPORT( FT_Angle )
  FT_Atan2( FT_Fixed  x,
            FT_Fixed  y );

  /*************************************************************************
   *
   * @function:
   *   FT_Angle_Diff
   *
   * @description:
   *   Return the difference between two angles.  The result is always
   *   constrained to the ]-PI..PI] interval.
   *
   * @input:
   *   angle1 ::
   *     First angle.
   *
   *   angle2 ::
   *     Second angle.
   *
   * @return:
   *   Constrained value of `value2-value1'.
   *
   */
  FT_EXPORT( FT_Angle )
  FT_Angle_Diff( FT_Angle  angle1,
                 FT_Angle  angle2 );

  /*************************************************************************
   *
   * @function:
   *   FT_Vector_Unit
   *
   * @description:
   *   Return the unit vector corresponding to a given angle.  After the
   *   call, the value of `vec.x' will be `cos(angle)', and the value of
   *   `vec.y' will be `sin(angle)'.
   *
   *   This function is useful to retrieve both the sinus and cosinus of a
   *   given angle quickly.
   *
   * @output:
   *   vec ::
   *     The address of target vector.
   *
   * @input:
   *   angle ::
   *     The input angle.
   *
   */
  FT_EXPORT( void )
  FT_Vector_Unit( FT_Vector*  vec,
                  FT_Angle    angle );

  /*************************************************************************
   *
   * @function:
   *   FT_Vector_Rotate
   *
   * @description:
   *   Rotate a vector by a given angle.
   *
   * @inout:
   *   vec ::
   *     The address of target vector.
   *
   * @input:
   *   angle ::
   *     The input angle.
   *
   */
  FT_EXPORT( void )
  FT_Vector_Rotate( FT_Vector*  vec,
                    FT_Angle    angle );

  /*************************************************************************
   *
   * @function:
   *   FT_Vector_Length
   *
   * @description:
   *   Return the length of a given vector.
   *
   * @input:
   *   vec ::
   *     The address of target vector.
   *
   * @return:
   *   The vector length, expressed in the same units that the original
   *   vector coordinates.
   *
   */
  FT_EXPORT( FT_Fixed )
  FT_Vector_Length( FT_Vector*  vec );

  /*************************************************************************
   *
   * @function:
   *   FT_Vector_Polarize
   *
   * @description:
   *   Compute both the length and angle of a given vector.
   *
   * @input:
   *   vec ::
   *     The address of source vector.
   *
   * @output:
   *   length ::
   *     The vector length.
   *
   *   angle ::
   *     The vector angle.
   *
   */
  FT_EXPORT( void )
  FT_Vector_Polarize( FT_Vector*  vec,
                      FT_Fixed   *length,
                      FT_Angle   *angle );

  /*************************************************************************
   *
   * @function:
   *   FT_Vector_From_Polar
   *
   * @description:
   *   Compute vector coordinates from a length and angle.
   *
   * @output:
   *   vec ::
   *     The address of source vector.
   *
   * @input:
   *   length ::
   *     The vector length.
   *
   *   angle ::
   *     The vector angle.
   *
   */
  FT_EXPORT( void )
  FT_Vector_From_Polar( FT_Vector*  vec,
                        FT_Fixed    length,
                        FT_Angle    angle );

  /* */

FT_END_HEADER

#endif /* FTTRIGON_H_ */

/* END */