misc/libfreetype/src/base/ftinit.c
author unc0rr
Wed, 10 Oct 2012 00:40:00 +0400
changeset 7738 abcc7012de0b
parent 5172 88f2e05288ba
permissions -rw-r--r--
Please pas2c
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/***************************************************************************/
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/*                                                                         */
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/*  ftinit.c                                                               */
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/*                                                                         */
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/*    FreeType initialization layer (body).                                */
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/*                                                                         */
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/*  Copyright 1996-2001, 2002, 2005, 2007, 2009 by                         */
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/*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
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/*                                                                         */
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/*  This file is part of the FreeType project, and may only be used,       */
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/*  modified, and distributed under the terms of the FreeType project      */
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/*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */
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/*  this file you indicate that you have read the license and              */
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/*  understand and accept it fully.                                        */
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/*                                                                         */
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/***************************************************************************/
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  /*************************************************************************/
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  /*                                                                       */
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  /*  The purpose of this file is to implement the following two           */
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  /*  functions:                                                           */
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  /*                                                                       */
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  /*  FT_Add_Default_Modules():                                            */
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  /*     This function is used to add the set of default modules to a      */
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  /*     fresh new library object.  The set is taken from the header file  */
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  /*     `freetype/config/ftmodule.h'.  See the document `FreeType 2.0     */
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  /*     Build System' for more information.                               */
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  /*                                                                       */
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  /*  FT_Init_FreeType():                                                  */
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  /*     This function creates a system object for the current platform,   */
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  /*     builds a library out of it, then calls FT_Default_Drivers().      */
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  /*                                                                       */
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  /*  Note that even if FT_Init_FreeType() uses the implementation of the  */
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  /*  system object defined at build time, client applications are still   */
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  /*  able to provide their own `ftsystem.c'.                              */
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  /*                                                                       */
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  /*************************************************************************/
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#include <ft2build.h>
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#include FT_CONFIG_CONFIG_H
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#include FT_INTERNAL_OBJECTS_H
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#include FT_INTERNAL_DEBUG_H
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#include FT_MODULE_H
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#include "basepic.h"
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  /*************************************************************************/
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  /*                                                                       */
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  /* The macro FT_COMPONENT is used in trace mode.  It is an implicit      */
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  /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log  */
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  /* messages during execution.                                            */
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  /*                                                                       */
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#undef  FT_COMPONENT
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#define FT_COMPONENT  trace_init
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#ifndef FT_CONFIG_OPTION_PIC
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#undef  FT_USE_MODULE
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#ifdef __cplusplus
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#define FT_USE_MODULE( type, x )  extern "C" const type  x;
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#else
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#define FT_USE_MODULE( type, x )  extern const type  x;
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#endif
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#include FT_CONFIG_MODULES_H
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#undef  FT_USE_MODULE
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#define FT_USE_MODULE( type, x )  (const FT_Module_Class*)&(x),
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  static
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  const FT_Module_Class*  const ft_default_modules[] =
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  {
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#include FT_CONFIG_MODULES_H
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    0
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  };
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#else /* FT_CONFIG_OPTION_PIC */
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#ifdef __cplusplus
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#define FT_EXTERNC  extern "C"
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#else
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#define FT_EXTERNC  extern
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#endif
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  /* declare the module's class creation/destruction functions */
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#undef  FT_USE_MODULE
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#define FT_USE_MODULE( type, x )  \
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  FT_EXTERNC FT_Error FT_Create_Class_##x( FT_Library library, FT_Module_Class** output_class ); \
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  FT_EXTERNC void     FT_Destroy_Class_##x( FT_Library library, FT_Module_Class*  clazz );
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#include FT_CONFIG_MODULES_H
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  /* count all module classes */
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#undef  FT_USE_MODULE
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#define FT_USE_MODULE( type, x )  MODULE_CLASS_##x,
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  enum
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  {
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#include FT_CONFIG_MODULES_H
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    FT_NUM_MODULE_CLASSES
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  };
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  /* destroy all module classes */  
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#undef  FT_USE_MODULE
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#define FT_USE_MODULE( type, x )  \
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  if ( classes[i] ) { FT_Destroy_Class_##x(library, classes[i]); } \
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  i++;                                                             \
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  FT_BASE_DEF( void )
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  ft_destroy_default_module_classes( FT_Library  library )
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  {
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    FT_Module_Class** classes;
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    FT_Memory         memory;
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    FT_UInt           i;
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    BasePIC*          pic_container = (BasePIC*)library->pic_container.base;
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    if ( !pic_container->default_module_classes )
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      return;
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    memory = library->memory;
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    classes = pic_container->default_module_classes;
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    i = 0;
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#include FT_CONFIG_MODULES_H
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    FT_FREE( classes );
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    pic_container->default_module_classes = 0;
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  }
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  /* initialize all module classes and the pointer table */
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#undef  FT_USE_MODULE
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#define FT_USE_MODULE( type, x )                \
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  error = FT_Create_Class_##x(library, &clazz); \
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  if (error) goto Exit;                         \
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  classes[i++] = clazz;
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  FT_BASE_DEF( FT_Error )
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  ft_create_default_module_classes( FT_Library  library )
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  {
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    FT_Error          error;
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    FT_Memory         memory;
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    FT_Module_Class** classes;
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    FT_Module_Class*  clazz;
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    FT_UInt           i;
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    BasePIC*          pic_container = (BasePIC*)library->pic_container.base;
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    memory = library->memory;  
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    pic_container->default_module_classes = 0;
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    if ( FT_ALLOC(classes, sizeof(FT_Module_Class*) * (FT_NUM_MODULE_CLASSES + 1) ) )
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      return error;
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    /* initialize all pointers to 0, especially the last one */
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    for (i = 0; i < FT_NUM_MODULE_CLASSES; i++)
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      classes[i] = 0;
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    classes[FT_NUM_MODULE_CLASSES] = 0;
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    i = 0;
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#include FT_CONFIG_MODULES_H
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Exit:    
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    if (error) ft_destroy_default_module_classes( library );
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    else pic_container->default_module_classes = classes;
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    return error;    
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  }
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#endif /* FT_CONFIG_OPTION_PIC */
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  /* documentation is in ftmodapi.h */
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  FT_EXPORT_DEF( void )
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  FT_Add_Default_Modules( FT_Library  library )
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  {
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    FT_Error                       error;
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    const FT_Module_Class* const*  cur;
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    /* test for valid `library' delayed to FT_Add_Module() */
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    cur = FT_DEFAULT_MODULES_GET;
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    while ( *cur )
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    {
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      error = FT_Add_Module( library, *cur );
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      /* notify errors, but don't stop */
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      if ( error )
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        FT_TRACE0(( "FT_Add_Default_Module:"
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                    " Cannot install `%s', error = 0x%x\n",
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                    (*cur)->module_name, error ));
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      cur++;
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    }
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  }
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  /* documentation is in freetype.h */
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  FT_EXPORT_DEF( FT_Error )
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  FT_Init_FreeType( FT_Library  *alibrary )
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  {
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    FT_Error   error;
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    FT_Memory  memory;
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    /* First of all, allocate a new system object -- this function is part */
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    /* of the system-specific component, i.e. `ftsystem.c'.                */
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    memory = FT_New_Memory();
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    if ( !memory )
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    {
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      FT_ERROR(( "FT_Init_FreeType: cannot find memory manager\n" ));
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      return FT_Err_Unimplemented_Feature;
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    }
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    /* build a library out of it, then fill it with the set of */
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    /* default drivers.                                        */
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    error = FT_New_Library( memory, alibrary );
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    if ( error )
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      FT_Done_Memory( memory );
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    else
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      FT_Add_Default_Modules( *alibrary );
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    return error;
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  }
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  /* documentation is in freetype.h */
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  FT_EXPORT_DEF( FT_Error )
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  FT_Done_FreeType( FT_Library  library )
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  {
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    if ( library )
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    {
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      FT_Memory  memory = library->memory;
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      /* Discard the library object */
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      FT_Done_Library( library );
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      /* discard memory manager */
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      FT_Done_Memory( memory );
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    }
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    return FT_Err_Ok;
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  }
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/* END */