misc/libfreetype/src/pfr/pfrdrivr.c
author koda
Thu, 25 Jul 2013 23:16:06 +0200
changeset 9371 f3840de881bd
parent 5172 88f2e05288ba
permissions -rw-r--r--
strip out our copy of libtremor SDL2_mixer comes with a more updated, better integrated version
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/***************************************************************************/
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/*                                                                         */
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/*  pfrdrivr.c                                                             */
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/*                                                                         */
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/*    FreeType PFR driver interface (body).                                */
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/*                                                                         */
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/*  Copyright 2002, 2003, 2004, 2006, 2008, 2010 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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#include <ft2build.h>
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#include FT_INTERNAL_DEBUG_H
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#include FT_INTERNAL_STREAM_H
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#include FT_SERVICE_PFR_H
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#include FT_SERVICE_XFREE86_NAME_H
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#include "pfrdrivr.h"
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#include "pfrobjs.h"
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#include "pfrerror.h"
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  FT_CALLBACK_DEF( FT_Error )
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  pfr_get_kerning( FT_Face     pfrface,     /* PFR_Face */
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                   FT_UInt     left,
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                   FT_UInt     right,
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                   FT_Vector  *avector )
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  {
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    PFR_Face     face = (PFR_Face)pfrface;
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    PFR_PhyFont  phys = &face->phy_font;
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    pfr_face_get_kerning( pfrface, left, right, avector );
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    /* convert from metrics to outline units when necessary */
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    if ( phys->outline_resolution != phys->metrics_resolution )
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    {
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      if ( avector->x != 0 )
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        avector->x = FT_MulDiv( avector->x, phys->outline_resolution,
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                                            phys->metrics_resolution );
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      if ( avector->y != 0 )
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        avector->y = FT_MulDiv( avector->x, phys->outline_resolution,
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                                            phys->metrics_resolution );
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    }
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    return PFR_Err_Ok;
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  }
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 /*
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  *  PFR METRICS SERVICE
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  *
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  */
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  FT_CALLBACK_DEF( FT_Error )
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  pfr_get_advance( FT_Face   pfrface,       /* PFR_Face */
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                   FT_UInt   gindex,
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                   FT_Pos   *anadvance )
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  {
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    PFR_Face  face  = (PFR_Face)pfrface;
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    FT_Error  error = PFR_Err_Invalid_Argument;
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    *anadvance = 0;
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    if ( !gindex )
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      goto Exit;
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    gindex--;
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    if ( face )
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    {
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      PFR_PhyFont  phys = &face->phy_font;
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      if ( gindex < phys->num_chars )
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      {
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        *anadvance = phys->chars[gindex].advance;
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        error = PFR_Err_Ok;
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      }
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    }
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  Exit:
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    return error;
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  }
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  FT_CALLBACK_DEF( FT_Error )
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  pfr_get_metrics( FT_Face    pfrface,      /* PFR_Face */
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                   FT_UInt   *anoutline_resolution,
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                   FT_UInt   *ametrics_resolution,
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                   FT_Fixed  *ametrics_x_scale,
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                   FT_Fixed  *ametrics_y_scale )
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  {
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    PFR_Face     face = (PFR_Face)pfrface;
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    PFR_PhyFont  phys = &face->phy_font;
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    FT_Fixed     x_scale, y_scale;
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    FT_Size      size = face->root.size;
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    if ( anoutline_resolution )
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      *anoutline_resolution = phys->outline_resolution;
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    if ( ametrics_resolution )
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      *ametrics_resolution = phys->metrics_resolution;
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    x_scale = 0x10000L;
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    y_scale = 0x10000L;
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    if ( size )
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    {
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      x_scale = FT_DivFix( size->metrics.x_ppem << 6,
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                           phys->metrics_resolution );
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      y_scale = FT_DivFix( size->metrics.y_ppem << 6,
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                           phys->metrics_resolution );
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    }
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    if ( ametrics_x_scale )
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      *ametrics_x_scale = x_scale;
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    if ( ametrics_y_scale )
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      *ametrics_y_scale = y_scale;
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    return PFR_Err_Ok;
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  }
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  FT_CALLBACK_TABLE_DEF
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  const FT_Service_PfrMetricsRec  pfr_metrics_service_rec =
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  {
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    pfr_get_metrics,
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    pfr_face_get_kerning,
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    pfr_get_advance
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  };
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 /*
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  *  SERVICE LIST
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  *
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  */
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  static const FT_ServiceDescRec  pfr_services[] =
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  {
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    { FT_SERVICE_ID_PFR_METRICS, &pfr_metrics_service_rec },
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    { FT_SERVICE_ID_XF86_NAME,   FT_XF86_FORMAT_PFR },
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    { NULL, NULL }
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  };
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  FT_CALLBACK_DEF( FT_Module_Interface )
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  pfr_get_service( FT_Module         module,
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                   const FT_String*  service_id )
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  {
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    FT_UNUSED( module );
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    return ft_service_list_lookup( pfr_services, service_id );
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  }
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  FT_CALLBACK_TABLE_DEF
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  const FT_Driver_ClassRec  pfr_driver_class =
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  {
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    {
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      FT_MODULE_FONT_DRIVER     |
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      FT_MODULE_DRIVER_SCALABLE,
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      sizeof( FT_DriverRec ),
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      "pfr",
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      0x10000L,
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      0x20000L,
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      NULL,
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      0,
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      0,
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      pfr_get_service
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    },
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    sizeof( PFR_FaceRec ),
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    sizeof( PFR_SizeRec ),
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    sizeof( PFR_SlotRec ),
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    pfr_face_init,
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    pfr_face_done,
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    0,                  /* FT_Size_InitFunc */
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    0,                  /* FT_Size_DoneFunc */
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    pfr_slot_init,
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    pfr_slot_done,
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#ifdef FT_CONFIG_OPTION_OLD_INTERNALS
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    ft_stub_set_char_sizes,
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    ft_stub_set_pixel_sizes,
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#endif
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    pfr_slot_load,
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    pfr_get_kerning,
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    0,                  /* FT_Face_AttachFunc      */
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    0,                   /* FT_Face_GetAdvancesFunc */
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    0,                  /* FT_Size_RequestFunc */
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    0,                  /* FT_Size_SelectFunc  */
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  };
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/* END */