lib/3rdparty/freetype/src/base/ftpfr.c

   1 /***************************************************************************/
   2 /*                                                                         */
   3 /*  ftpfr.c                                                                */
   4 /*                                                                         */
   5 /*    FreeType API for accessing PFR-specific data (body).                 */
   6 /*                                                                         */
   7 /*  Copyright 2002, 2003, 2004, 2008, 2010 by                              */
   8 /*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
   9 /*                                                                         */
  10 /*  This file is part of the FreeType project, and may only be used,       */
  11 /*  modified, and distributed under the terms of the FreeType project      */
  12 /*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */
  13 /*  this file you indicate that you have read the license and              */
  14 /*  understand and accept it fully.                                        */
  15 /*                                                                         */
  16 /***************************************************************************/
  17
  18 #include <ft2build.h>
  19 #include FT_INTERNAL_OBJECTS_H
  20 #include FT_SERVICE_PFR_H
  21
  22
  23   /* check the format */
  24   static FT_Service_PfrMetrics
  25   ft_pfr_check( FT_Face  face )
  26   {
  27     FT_Service_PfrMetrics  service = NULL;
  28
  29
  30     if ( face )
  31       FT_FACE_LOOKUP_SERVICE( face, service, PFR_METRICS );
  32
  33     return service;
  34   }
  35
  36
  37   /* documentation is in ftpfr.h */
  38
  39   FT_EXPORT_DEF( FT_Error )
  40   FT_Get_PFR_Metrics( FT_Face    face,
  41                       FT_UInt   *aoutline_resolution,
  42                       FT_UInt   *ametrics_resolution,
  43                       FT_Fixed  *ametrics_x_scale,
  44                       FT_Fixed  *ametrics_y_scale )
  45   {
  46     FT_Error               error = FT_Err_Ok;
  47     FT_Service_PfrMetrics  service;
  48
  49
  50     if ( !face )
  51       return FT_Err_Invalid_Argument;
  52
  53     service = ft_pfr_check( face );
  54     if ( service )
  55     {
  56       error = service->get_metrics( face,
  57                                     aoutline_resolution,
  58                                     ametrics_resolution,
  59                                     ametrics_x_scale,
  60                                     ametrics_y_scale );
  61     }
  62     else
  63     {
  64       FT_Fixed  x_scale, y_scale;
  65
  66
  67       /* this is not a PFR font */
  68       if ( aoutline_resolution )
  69         *aoutline_resolution = face->units_per_EM;
  70
  71       if ( ametrics_resolution )
  72         *ametrics_resolution = face->units_per_EM;
  73
  74       x_scale = y_scale = 0x10000L;
  75       if ( face->size )
  76       {
  77         x_scale = face->size->metrics.x_scale;
  78         y_scale = face->size->metrics.y_scale;
  79       }
  80
  81       if ( ametrics_x_scale )
  82         *ametrics_x_scale = x_scale;
  83
  84       if ( ametrics_y_scale )
  85         *ametrics_y_scale = y_scale;
  86
  87       error = FT_Err_Unknown_File_Format;
  88     }
  89
  90     return error;
  91   }
  92
  93
  94   /* documentation is in ftpfr.h */
  95
  96   FT_EXPORT_DEF( FT_Error )
  97   FT_Get_PFR_Kerning( FT_Face     face,
  98                       FT_UInt     left,
  99                       FT_UInt     right,
 100                       FT_Vector  *avector )
 101   {
 102     FT_Error               error;
 103     FT_Service_PfrMetrics  service;
 104
 105
 106     if ( !face )
 107       return FT_Err_Invalid_Argument;
 108
 109     service = ft_pfr_check( face );
 110     if ( service )
 111       error = service->get_kerning( face, left, right, avector );
 112     else
 113       error = FT_Get_Kerning( face, left, right,
 114                               FT_KERNING_UNSCALED, avector );
 115
 116     return error;
 117   }
 118
 119
 120   /* documentation is in ftpfr.h */
 121
 122   FT_EXPORT_DEF( FT_Error )
 123   FT_Get_PFR_Advance( FT_Face   face,
 124                       FT_UInt   gindex,
 125                       FT_Pos   *aadvance )
 126   {
 127     FT_Error               error;
 128     FT_Service_PfrMetrics  service;
 129
 130
 131     service = ft_pfr_check( face );
 132     if ( service )
 133     {
 134       error = service->get_advance( face, gindex, aadvance );
 135     }
 136     else
 137       /* XXX: TODO: PROVIDE ADVANCE-LOADING METHOD TO ALL FONT DRIVERS */
 138       error = FT_Err_Invalid_Argument;
 139
 140     return error;
 141   }
 142
 143
 144 /* END */