ftbdf.c

下载来的一个看图软件的源代码

/***************************************************************************/
/*                                                                         */
/*  ftbdf.c                                                                */
/*                                                                         */
/*    FreeType API for accessing BDF-specific strings (body).              */
/*                                                                         */
/*  Copyright 2002, 2003 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.                                        */
/*                                                                         */
/***************************************************************************/


#include <ft2build.h>
#include FT_INTERNAL_BDF_TYPES_H
#include FT_INTERNAL_OBJECTS_H


  static FT_Bool
  test_font_type( FT_Face      face,
                  const char*  name )
  {
    if ( face && face->driver )
    {
      FT_Module  driver = (FT_Module)face->driver;


      if ( driver->clazz && driver->clazz->module_name )
      {
        if ( ft_strcmp( driver->clazz->module_name, name ) == 0 )
          return 1;
      }
    }
    return 0;
  }


  FT_EXPORT_DEF( FT_Error )
  FT_Get_BDF_Charset_ID( FT_Face       face,
                         const char*  *acharset_encoding,
                         const char*  *acharset_registry )
  {
    FT_Error     error;
    const char*  encoding = NULL;
    const char*  registry = NULL;


    error = FT_Err_Invalid_Argument;

    if ( test_font_type( face, "bdf" ) )
    {
      BDF_Public_Face  bdf_face = (BDF_Public_Face)face;


      encoding = (const char*) bdf_face->charset_encoding;
      registry = (const char*) bdf_face->charset_registry;
      error    = 0;
    }

    if ( acharset_encoding )
      *acharset_encoding = encoding;

    if ( acharset_registry )
      *acharset_registry = registry;

    return error;
  }


  FT_EXPORT( FT_Error )
  FT_Get_BDF_Property( FT_Face           face,
                       const char*       prop_name,
                       BDF_PropertyRec  *aproperty )
  {
    FT_Error  error;


    error = FT_Err_Invalid_Argument;

    aproperty->type = BDF_PROPERTY_TYPE_NONE;

    if ( face != NULL && face->driver != NULL )
    {
      FT_Driver            driver = face->driver;
      BDF_GetPropertyFunc  func;


      if ( driver->root.clazz->get_interface )
      {
        func = (BDF_GetPropertyFunc)driver->root.clazz->get_interface(
                 FT_MODULE( driver ), "get_bdf_property" );
        if ( func )
          error = func( face, prop_name, aproperty );
      }
    }

    return error;
  }


/* END */