thirdparty/freetype-2.3.12/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 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;
  28
  29
  30     FT_FACE_LOOKUP_SERVICE( face, service, PFR_METRICS );
  31
  32     return service;
  33   }
  34
  35
  36   /* documentation is in ftpfr.h */
  37
  38   FT_EXPORT_DEF( FT_Error )
  39   FT_Get_PFR_Metrics( FT_Face    face,
  40                       FT_UInt   *aoutline_resolution,
  41                       FT_UInt   *ametrics_resolution,
  42                       FT_Fixed  *ametrics_x_scale,
  43                       FT_Fixed  *ametrics_y_scale )
  44   {
  45     FT_Error               error = FT_Err_Ok;
  46     FT_Service_PfrMetrics  service;
  47
  48
  49     if ( !face )
  50       return FT_Err_Invalid_Argument;
  51
  52     service = ft_pfr_check( face );
  53     if ( service )
  54     {
  55       error = service->get_metrics( face,
  56                                     aoutline_resolution,
  57                                     ametrics_resolution,
  58                                     ametrics_x_scale,
  59                                     ametrics_y_scale );
  60     }
  61     else
  62     {
  63       FT_Fixed  x_scale, y_scale;
  64
  65
  66       /* this is not a PFR font */
  67       if ( aoutline_resolution )
  68         *aoutline_resolution = face->units_per_EM;
  69
  70       if ( ametrics_resolution )
  71         *ametrics_resolution = face->units_per_EM;
  72
  73       x_scale = y_scale = 0x10000L;
  74       if ( face->size )
  75       {
  76         x_scale = face->size->metrics.x_scale;
  77         y_scale = face->size->metrics.y_scale;
  78       }
  79
  80       if ( ametrics_x_scale )
  81         *ametrics_x_scale = x_scale;
  82
  83       if ( ametrics_y_scale )
  84         *ametrics_y_scale = y_scale;
  85
  86       error = FT_Err_Unknown_File_Format;
  87     }
  88
  89     return error;
  90   }
  91
  92
  93   /* documentation is in ftpfr.h */
  94
  95   FT_EXPORT_DEF( FT_Error )
  96   FT_Get_PFR_Kerning( FT_Face     face,
  97                       FT_UInt     left,
  98                       FT_UInt     right,
  99                       FT_Vector  *avector )
 100   {
 101     FT_Error               error;
 102     FT_Service_PfrMetrics  service;
 103
 104
 105     if ( !face )
 106       return FT_Err_Invalid_Argument;
 107
 108     service = ft_pfr_check( face );
 109     if ( service )
 110       error = service->get_kerning( face, left, right, avector );
 111     else
 112       error = FT_Get_Kerning( face, left, right,
 113                               FT_KERNING_UNSCALED, avector );
 114
 115     return error;
 116   }
 117
 118
 119   /* documentation is in ftpfr.h */
 120
 121   FT_EXPORT_DEF( FT_Error )
 122   FT_Get_PFR_Advance( FT_Face   face,
 123                       FT_UInt   gindex,
 124                       FT_Pos   *aadvance )
 125   {
 126     FT_Error               error;
 127     FT_Service_PfrMetrics  service;
 128
 129
 130     service = ft_pfr_check( face );
 131     if ( service )
 132     {
 133       error = service->get_advance( face, gindex, aadvance );
 134     }
 135     else
 136       /* XXX: TODO: PROVIDE ADVANCE-LOADING METHOD TO ALL FONT DRIVERS */
 137       error = FT_Err_Invalid_Argument;
 138
 139     return error;
 140   }
 141
 142
 143 /* END */