/***************************************************************************/

/*                                                                         */

/*  pfrdrivr.c                                                             */

/*                                                                         */

/*    FreeType PFR driver interface (body).                                */

/*                                                                         */

/*  Copyright 2002, 2003, 2004, 2006, 2008, 2010 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_DEBUG_H

#include FT_INTERNAL_STREAM_H

#include FT_SERVICE_PFR_H

#include FT_SERVICE_XFREE86_NAME_H

#include "pfrdrivr.h"

#include "pfrobjs.h"

#include "pfrerror.h"

  FT_CALLBACK_DEF( FT_Error )

  pfr_get_kerning( FT_Face     pfrface,     /* PFR_Face */

                   FT_UInt     left,

                   FT_UInt     right,

                   FT_Vector  *avector )

  {

    PFR_Face     face = (PFR_Face)pfrface;

    PFR_PhyFont  phys = &face->phy_font;

    pfr_face_get_kerning( pfrface, left, right, avector );

    /* convert from metrics to outline units when necessary */

    if ( phys->outline_resolution != phys->metrics_resolution )

    {

      if ( avector->x != 0 )

        avector->x = FT_MulDiv( avector->x, phys->outline_resolution,

                                            phys->metrics_resolution );

      if ( avector->y != 0 )

        avector->y = FT_MulDiv( avector->x, phys->outline_resolution,

                                            phys->metrics_resolution );

    }

    return PFR_Err_Ok;

  }

 /*

  *  PFR METRICS SERVICE

  *

  */

  FT_CALLBACK_DEF( FT_Error )

  pfr_get_advance( FT_Face   pfrface,       /* PFR_Face */

                   FT_UInt   gindex,

                   FT_Pos   *anadvance )

  {

    PFR_Face  face  = (PFR_Face)pfrface;

    FT_Error  error = PFR_Err_Invalid_Argument;

    *anadvance = 0;

    if ( !gindex )

      goto Exit;

    gindex--;

    if ( face )

    {

      PFR_PhyFont  phys = &face->phy_font;

      if ( gindex < phys->num_chars )

      {

        *anadvance = phys->chars[gindex].advance;

        error = PFR_Err_Ok;

      }

    }

  Exit:

    return error;

  }

  FT_CALLBACK_DEF( FT_Error )

  pfr_get_metrics( FT_Face    pfrface,      /* PFR_Face */

                   FT_UInt   *anoutline_resolution,

                   FT_UInt   *ametrics_resolution,

                   FT_Fixed  *ametrics_x_scale,

                   FT_Fixed  *ametrics_y_scale )

  {

    PFR_Face     face = (PFR_Face)pfrface;

    PFR_PhyFont  phys = &face->phy_font;

    FT_Fixed     x_scale, y_scale;

    FT_Size      size = face->root.size;

    if ( anoutline_resolution )

      *anoutline_resolution = phys->outline_resolution;

    if ( ametrics_resolution )

      *ametrics_resolution = phys->metrics_resolution;

    x_scale = 0x10000L;

    y_scale = 0x10000L;

    if ( size )

    {

      x_scale = FT_DivFix( size->metrics.x_ppem << 6,

                           phys->metrics_resolution );

      y_scale = FT_DivFix( size->metrics.y_ppem << 6,

                           phys->metrics_resolution );

    }

    if ( ametrics_x_scale )

      *ametrics_x_scale = x_scale;

    if ( ametrics_y_scale )

      *ametrics_y_scale = y_scale;

    return PFR_Err_Ok;

  }

  FT_CALLBACK_TABLE_DEF

  const FT_Service_PfrMetricsRec  pfr_metrics_service_rec =

  {

    pfr_get_metrics,

    pfr_face_get_kerning,

    pfr_get_advance

  };

 /*

  *  SERVICE LIST

  *

  */

  static const FT_ServiceDescRec  pfr_services[] =

  {

    { FT_SERVICE_ID_PFR_METRICS, &pfr_metrics_service_rec },

    { FT_SERVICE_ID_XF86_NAME,   FT_XF86_FORMAT_PFR },

    { NULL, NULL }

  };

  FT_CALLBACK_DEF( FT_Module_Interface )

  pfr_get_service( FT_Module         module,

                   const FT_String*  service_id )

  {

    FT_UNUSED( module );

    return ft_service_list_lookup( pfr_services, service_id );

  }

  FT_CALLBACK_TABLE_DEF

  const FT_Driver_ClassRec  pfr_driver_class =

  {

    {

      FT_MODULE_FONT_DRIVER     |

      FT_MODULE_DRIVER_SCALABLE,

      sizeof( FT_DriverRec ),

      "pfr",

      0x10000L,

      0x20000L,

      NULL,

      0,

      0,

      pfr_get_service

    },

    sizeof( PFR_FaceRec ),

    sizeof( PFR_SizeRec ),

    sizeof( PFR_SlotRec ),

    pfr_face_init,

    pfr_face_done,

    0,                  /* FT_Size_InitFunc */

    0,                  /* FT_Size_DoneFunc */

    pfr_slot_init,

    pfr_slot_done,

#ifdef FT_CONFIG_OPTION_OLD_INTERNALS

    ft_stub_set_char_sizes,

    ft_stub_set_pixel_sizes,

#endif

    pfr_slot_load,

    pfr_get_kerning,

    0,                  /* FT_Face_AttachFunc      */

    0,                   /* FT_Face_GetAdvancesFunc */

    0,                  /* FT_Size_RequestFunc */

    0,                  /* FT_Size_SelectFunc  */

  };

/* END */