ReactOS Development > Doxygen

00001 /***************************************************************************/
00002 /*                                                                         */
00003 /*  ftpfr.c                                                                */
00004 /*                                                                         */
00005 /*    FreeType API for accessing PFR-specific data (body).                 */
00006 /*                                                                         */
00007 /*  Copyright 2002, 2003, 2004, 2008, 2010 by                              */
00008 /*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
00009 /*                                                                         */
00010 /*  This file is part of the FreeType project, and may only be used,       */
00011 /*  modified, and distributed under the terms of the FreeType project      */
00012 /*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */
00013 /*  this file you indicate that you have read the license and              */
00014 /*  understand and accept it fully.                                        */
00015 /*                                                                         */
00016 /***************************************************************************/
00017 
00018 #include <ft2build.h>
00019 #include FT_INTERNAL_OBJECTS_H
00020 #include FT_SERVICE_PFR_H
00021 
00022 
00023   /* check the format */
00024   static FT_Service_PfrMetrics
00025   ft_pfr_check( FT_Face  face )
00026   {
00027     FT_Service_PfrMetrics  service = NULL;
00028 
00029 
00030     if ( face )
00031       FT_FACE_LOOKUP_SERVICE( face, service, PFR_METRICS );
00032 
00033     return service;
00034   }
00035 
00036 
00037   /* documentation is in ftpfr.h */
00038 
00039   FT_EXPORT_DEF( FT_Error )
00040   FT_Get_PFR_Metrics( FT_Face    face,
00041                       FT_UInt   *aoutline_resolution,
00042                       FT_UInt   *ametrics_resolution,
00043                       FT_Fixed  *ametrics_x_scale,
00044                       FT_Fixed  *ametrics_y_scale )
00045   {
00046     FT_Error               error = FT_Err_Ok;
00047     FT_Service_PfrMetrics  service;
00048 
00049 
00050     if ( !face )
00051       return FT_Err_Invalid_Argument;
00052 
00053     service = ft_pfr_check( face );
00054     if ( service )
00055     {
00056       error = service->get_metrics( face,
00057                                     aoutline_resolution,
00058                                     ametrics_resolution,
00059                                     ametrics_x_scale,
00060                                     ametrics_y_scale );
00061     }
00062     else
00063     {
00064       FT_Fixed  x_scale, y_scale;
00065 
00066 
00067       /* this is not a PFR font */
00068       if ( aoutline_resolution )
00069         *aoutline_resolution = face->units_per_EM;
00070 
00071       if ( ametrics_resolution )
00072         *ametrics_resolution = face->units_per_EM;
00073 
00074       x_scale = y_scale = 0x10000L;
00075       if ( face->size )
00076       {
00077         x_scale = face->size->metrics.x_scale;
00078         y_scale = face->size->metrics.y_scale;
00079       }
00080 
00081       if ( ametrics_x_scale )
00082         *ametrics_x_scale = x_scale;
00083 
00084       if ( ametrics_y_scale )
00085         *ametrics_y_scale = y_scale;
00086 
00087       error = FT_Err_Unknown_File_Format;
00088     }
00089 
00090     return error;
00091   }
00092 
00093 
00094   /* documentation is in ftpfr.h */
00095 
00096   FT_EXPORT_DEF( FT_Error )
00097   FT_Get_PFR_Kerning( FT_Face     face,
00098                       FT_UInt     left,
00099                       FT_UInt     right,
00100                       FT_Vector  *avector )
00101   {
00102     FT_Error               error;
00103     FT_Service_PfrMetrics  service;
00104 
00105 
00106     if ( !face )
00107       return FT_Err_Invalid_Argument;
00108 
00109     service = ft_pfr_check( face );
00110     if ( service )
00111       error = service->get_kerning( face, left, right, avector );
00112     else
00113       error = FT_Get_Kerning( face, left, right,
00114                               FT_KERNING_UNSCALED, avector );
00115 
00116     return error;
00117   }
00118 
00119 
00120   /* documentation is in ftpfr.h */
00121 
00122   FT_EXPORT_DEF( FT_Error )
00123   FT_Get_PFR_Advance( FT_Face   face,
00124                       FT_UInt   gindex,
00125                       FT_Pos   *aadvance )
00126   {
00127     FT_Error               error;
00128     FT_Service_PfrMetrics  service;
00129 
00130 
00131     service = ft_pfr_check( face );
00132     if ( service )
00133     {
00134       error = service->get_advance( face, gindex, aadvance );
00135     }
00136     else
00137       /* XXX: TODO: PROVIDE ADVANCE-LOADING METHOD TO ALL FONT DRIVERS */
00138       error = FT_Err_Invalid_Argument;
00139 
00140     return error;
00141   }
00142 
00143 
00144 /* END */
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