lib/3rdparty/freetype/src/pfr/pfrdrivr.c

   1 /***************************************************************************/
   2 /*                                                                         */
   3 /*  pfrdrivr.c                                                             */
   4 /*                                                                         */
   5 /*    FreeType PFR driver interface (body).                                */
   6 /*                                                                         */
   7 /*  Copyright 2002, 2003, 2004, 2006, 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
  19 #include <ft2build.h>
  20 #include FT_INTERNAL_DEBUG_H
  21 #include FT_INTERNAL_STREAM_H
  22 #include FT_SERVICE_PFR_H
  23 #include FT_SERVICE_XFREE86_NAME_H
  24 #include "pfrdrivr.h"
  25 #include "pfrobjs.h"
  26
  27 #include "pfrerror.h"
  28
  29
  30   FT_CALLBACK_DEF( FT_Error )
  31   pfr_get_kerning( FT_Face     pfrface,     /* PFR_Face */
  32                    FT_UInt     left,
  33                    FT_UInt     right,
  34                    FT_Vector  *avector )
  35   {
  36     PFR_Face     face = (PFR_Face)pfrface;
  37     PFR_PhyFont  phys = &face->phy_font;
  38
  39
  40     pfr_face_get_kerning( pfrface, left, right, avector );
  41
  42     /* convert from metrics to outline units when necessary */
  43     if ( phys->outline_resolution != phys->metrics_resolution )
  44     {
  45       if ( avector->x != 0 )
  46         avector->x = FT_MulDiv( avector->x, phys->outline_resolution,
  47                                             phys->metrics_resolution );
  48
  49       if ( avector->y != 0 )
  50         avector->y = FT_MulDiv( avector->x, phys->outline_resolution,
  51                                             phys->metrics_resolution );
  52     }
  53
  54     return PFR_Err_Ok;
  55   }
  56
  57
  58  /*
  59   *  PFR METRICS SERVICE
  60   *
  61   */
  62
  63   FT_CALLBACK_DEF( FT_Error )
  64   pfr_get_advance( FT_Face   pfrface,       /* PFR_Face */
  65                    FT_UInt   gindex,
  66                    FT_Pos   *anadvance )
  67   {
  68     PFR_Face  face  = (PFR_Face)pfrface;
  69     FT_Error  error = PFR_Err_Invalid_Argument;
  70
  71
  72     *anadvance = 0;
  73
  74     if ( !gindex )
  75       goto Exit;
  76
  77     gindex--;
  78
  79     if ( face )
  80     {
  81       PFR_PhyFont  phys = &face->phy_font;
  82
  83
  84       if ( gindex < phys->num_chars )
  85       {
  86         *anadvance = phys->chars[gindex].advance;
  87         error = 0;
  88       }
  89     }
  90
  91   Exit:
  92     return error;
  93   }
  94
  95
  96   FT_CALLBACK_DEF( FT_Error )
  97   pfr_get_metrics( FT_Face    pfrface,      /* PFR_Face */
  98                    FT_UInt   *anoutline_resolution,
  99                    FT_UInt   *ametrics_resolution,
 100                    FT_Fixed  *ametrics_x_scale,
 101                    FT_Fixed  *ametrics_y_scale )
 102   {
 103     PFR_Face     face = (PFR_Face)pfrface;
 104     PFR_PhyFont  phys = &face->phy_font;
 105     FT_Fixed     x_scale, y_scale;
 106     FT_Size      size = face->root.size;
 107
 108
 109     if ( anoutline_resolution )
 110       *anoutline_resolution = phys->outline_resolution;
 111
 112     if ( ametrics_resolution )
 113       *ametrics_resolution = phys->metrics_resolution;
 114
 115     x_scale = 0x10000L;
 116     y_scale = 0x10000L;
 117
 118     if ( size )
 119     {
 120       x_scale = FT_DivFix( size->metrics.x_ppem << 6,
 121                            phys->metrics_resolution );
 122
 123       y_scale = FT_DivFix( size->metrics.y_ppem << 6,
 124                            phys->metrics_resolution );
 125     }
 126
 127     if ( ametrics_x_scale )
 128       *ametrics_x_scale = x_scale;
 129
 130     if ( ametrics_y_scale )
 131       *ametrics_y_scale = y_scale;
 132
 133     return PFR_Err_Ok;
 134   }
 135
 136
 137   FT_CALLBACK_TABLE_DEF
 138   const FT_Service_PfrMetricsRec  pfr_metrics_service_rec =
 139   {
 140     pfr_get_metrics,
 141     pfr_face_get_kerning,
 142     pfr_get_advance
 143   };
 144
 145
 146  /*
 147   *  SERVICE LIST
 148   *
 149   */
 150
 151   static const FT_ServiceDescRec  pfr_services[] =
 152   {
 153     { FT_SERVICE_ID_PFR_METRICS, &pfr_metrics_service_rec },
 154     { FT_SERVICE_ID_XF86_NAME,   FT_XF86_FORMAT_PFR },
 155     { NULL, NULL }
 156   };
 157
 158
 159   FT_CALLBACK_DEF( FT_Module_Interface )
 160   pfr_get_service( FT_Module         module,
 161                    const FT_String*  service_id )
 162   {
 163     FT_UNUSED( module );
 164
 165     return ft_service_list_lookup( pfr_services, service_id );
 166   }
 167
 168
 169   FT_CALLBACK_TABLE_DEF
 170   const FT_Driver_ClassRec  pfr_driver_class =
 171   {
 172     {
 173       FT_MODULE_FONT_DRIVER     |
 174       FT_MODULE_DRIVER_SCALABLE,
 175
 176       sizeof( FT_DriverRec ),
 177
 178       "pfr",
 179       0x10000L,
 180       0x20000L,
 181
 182       NULL,
 183
 184       0,
 185       0,
 186       pfr_get_service
 187     },
 188
 189     sizeof( PFR_FaceRec ),
 190     sizeof( PFR_SizeRec ),
 191     sizeof( PFR_SlotRec ),
 192
 193     pfr_face_init,
 194     pfr_face_done,
 195     0,                  /* FT_Size_InitFunc */
 196     0,                  /* FT_Size_DoneFunc */
 197     pfr_slot_init,
 198     pfr_slot_done,
 199
 200 #ifdef FT_CONFIG_OPTION_OLD_INTERNALS
 201     ft_stub_set_char_sizes,
 202     ft_stub_set_pixel_sizes,
 203 #endif
 204     pfr_slot_load,
 205
 206     pfr_get_kerning,
 207     0,                  /* FT_Face_AttachFunc      */
 208     0,                   /* FT_Face_GetAdvancesFunc */
 209     0,                  /* FT_Size_RequestFunc */
 210     0,                  /* FT_Size_SelectFunc  */
 211   };
 212
 213
 214 /* END */