freetype2/src/autofit/afmodule.c

/***************************************************************************/
/*                                                                         */
/*  afmodule.c                                                             */
/*                                                                         */
/*    Auto-fitter module implementation (body).                            */
/*                                                                         */
/*  Copyright 2003-2006, 2009, 2011-2012 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 "afmodule.h"
#include "afloader.h"
#include "afpic.h"

#ifdef FT_DEBUG_AUTOFIT
  int    _af_debug_disable_horz_hints;
  int    _af_debug_disable_vert_hints;
  int    _af_debug_disable_blue_hints;
  void*  _af_debug_hints;
#endif

#include FT_INTERNAL_OBJECTS_H
#include FT_INTERNAL_DEBUG_H
#include FT_AUTOHINTER_H
#include FT_SERVICE_PROPERTIES_H


  /*************************************************************************/
  /*                                                                       */
  /* The macro FT_COMPONENT is used in trace mode.  It is an implicit      */
  /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log  */
  /* messages during execution.                                            */
  /*                                                                       */
#undef  FT_COMPONENT
#define FT_COMPONENT  trace_afmodule


  FT_Error
  af_property_set( FT_Library   library,
                   const char*  property_name,
                   const void*  value )
  {
    FT_UNUSED( library );
    FT_UNUSED( value );

    FT_TRACE0(( "af_property_get: missing property `%s'\n",
                property_name ));
    return FT_Err_Missing_Property;
  }


  FT_Error
  af_property_get( FT_Library   library,
                   const char*  property_name,
                   void*        value )
  {
    FT_Error  error = FT_Err_Ok;

    FT_UNUSED( library );


    if ( !ft_strcmp( property_name, "glyph-to-script-map" ) )
    {
      FT_Prop_GlyphToScriptMap*  prop = (FT_Prop_GlyphToScriptMap*)value;
      AF_FaceGlobals             globals;


      if ( !prop->face )
        return FT_Err_Invalid_Argument;

      globals = (AF_FaceGlobals)prop->face->autohint.data;
      if ( !globals )
      {
        /* trigger computation of the global script data */
        /* in case it hasn't been done yet               */
        error = af_face_globals_new( prop->face, &globals );
        if ( !error )
        {
          prop->face->autohint.data =
            (FT_Pointer)globals;
          prop->face->autohint.finalizer =
            (FT_Generic_Finalizer)af_face_globals_free;
        }
      }

      if ( !error )
        prop->map = globals->glyph_scripts;

      return error;
    }

    FT_TRACE0(( "af_property_get: missing property `%s'\n",
                property_name ));
    return FT_Err_Missing_Property;
  }


  FT_DEFINE_SERVICE_PROPERTIESREC(
    af_service_properties,
    (FT_Properties_SetFunc)af_property_set,
    (FT_Properties_GetFunc)af_property_get )


  FT_DEFINE_SERVICEDESCREC1(
    af_services,
    FT_SERVICE_ID_PROPERTIES, &AF_SERVICE_PROPERTIES_GET )


  FT_CALLBACK_DEF( FT_Module_Interface )
  af_get_interface( FT_Module    module,
                    const char*  module_interface )
  {
    /* AF_SERVICES_GET derefers `library' in PIC mode */
#ifdef FT_CONFIG_OPTION_PIC
    FT_Library  library;


    if ( !module )
      return NULL;
    library = module->library;
    if ( !library )
      return NULL;
#else
    FT_UNUSED( module );
#endif

    return ft_service_list_lookup( AF_SERVICES_GET, module_interface );
  }


  /*
   *  This is the `extended' FT_Module structure which holds the
   *  autofitter's global data (in `loader').  Right before hinting a glyph,
   *  the data specific to the glyph's face (blue zones, stem widths, etc.)
   *  are `swapped in' in function `af_loader_reset'.
   */

  typedef struct  AF_ModuleRec_
  {
    FT_ModuleRec  root;
    AF_LoaderRec  loader[1];

  } AF_ModuleRec, *AF_Module;


  FT_CALLBACK_DEF( FT_Error )
  af_autofitter_init( AF_Module  module )
  {
    return af_loader_init( module->loader, module->root.library->memory );
  }


  FT_CALLBACK_DEF( void )
  af_autofitter_done( AF_Module  module )
  {
    af_loader_done( module->loader );
  }


  FT_CALLBACK_DEF( FT_Error )
  af_autofitter_load_glyph( AF_Module     module,
                            FT_GlyphSlot  slot,
                            FT_Size       size,
                            FT_UInt       glyph_index,
                            FT_Int32      load_flags )
  {
    FT_UNUSED( size );

    return af_loader_load_glyph( module->loader, slot->face,
                                 glyph_index, load_flags );
  }


  FT_DEFINE_AUTOHINTER_INTERFACE(
    af_autofitter_interface,
    NULL,                                                    /* reset_face */
    NULL,                                              /* get_global_hints */
    NULL,                                             /* done_global_hints */
    (FT_AutoHinter_GlyphLoadFunc)af_autofitter_load_glyph )  /* load_glyph */


  FT_DEFINE_MODULE(
    autofit_module_class,

    FT_MODULE_HINTER,
    sizeof ( AF_ModuleRec ),

    "autofitter",
    0x10000L,   /* version 1.0 of the autofitter  */
    0x20000L,   /* requires FreeType 2.0 or above */

    (const void*)&AF_INTERFACE_GET,

    (FT_Module_Constructor)af_autofitter_init,
    (FT_Module_Destructor) af_autofitter_done,
    (FT_Module_Requester)  af_get_interface )


/* END */