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 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     service = ft_pfr_check( face );
  50     if ( service )
  51     {
  52       error = service->get_metrics( face,
  53                                     aoutline_resolution,
  54                                     ametrics_resolution,
  55                                     ametrics_x_scale,
  56                                     ametrics_y_scale );
  57     }
  58     else if ( face )
  59     {
  60       FT_Fixed  x_scale, y_scale;
  61
  62
  63       /* this is not a PFR font */
  64       *aoutline_resolution = face->units_per_EM;
  65       *ametrics_resolution = face->units_per_EM;
  66
  67       x_scale = y_scale = 0x10000L;
  68       if ( face->size )
  69       {
  70         x_scale = face->size->metrics.x_scale;
  71         y_scale = face->size->metrics.y_scale;
  72       }
  73       *ametrics_x_scale = x_scale;
  74       *ametrics_y_scale = y_scale;
  75     }
  76     else
  77       error = FT_Err_Invalid_Argument;
  78
  79     return error;
  80   }
  81
  82
  83   /* documentation is in ftpfr.h */
  84
  85   FT_EXPORT_DEF( FT_Error )
  86   FT_Get_PFR_Kerning( FT_Face     face,
  87                       FT_UInt     left,
  88                       FT_UInt     right,
  89                       FT_Vector  *avector )
  90   {
  91     FT_Error               error;
  92     FT_Service_PfrMetrics  service;
  93
  94
  95     service = ft_pfr_check( face );
  96     if ( service )
  97       error = service->get_kerning( face, left, right, avector );
  98     else if ( face )
  99       error = FT_Get_Kerning( face, left, right,
 100                               FT_KERNING_UNSCALED, avector );
 101     else
 102       error = FT_Err_Invalid_Argument;
 103
 104     return error;
 105   }
 106
 107
 108   /* documentation is in ftpfr.h */
 109
 110   FT_EXPORT_DEF( FT_Error )
 111   FT_Get_PFR_Advance( FT_Face   face,
 112                       FT_UInt   gindex,
 113                       FT_Pos   *aadvance )
 114   {
 115     FT_Error               error;
 116     FT_Service_PfrMetrics  service;
 117
 118
 119     service = ft_pfr_check( face );
 120     if ( service )
 121     {
 122       error = service->get_advance( face, gindex, aadvance );
 123     }
 124     else
 125       /* XXX: TODO: PROVIDE ADVANCE-LOADING METHOD TO ALL FONT DRIVERS */
 126       error = FT_Err_Invalid_Argument;
 127
 128     return error;
 129   }
 130
 131
 132 /* END */