src/type42/t42drivr.c

   1 /***************************************************************************/
   2 /*                                                                         */
   3 /*  t42drivr.c                                                             */
   4 /*                                                                         */
   5 /*    High-level Type 42 driver interface (body).                          */
   6 /*                                                                         */
   7 /*  Copyright 2002-2004, 2006, 2007, 2009, 2011, 2013 by                   */
   8 /*  Roberto Alameda.                                                       */
   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   /*************************************************************************/
  20   /*                                                                       */
  21   /* This driver implements Type42 fonts as described in the               */
  22   /* Technical Note #5012 from Adobe, with these limitations:              */
  23   /*                                                                       */
  24   /* 1) CID Fonts are not currently supported.                             */
  25   /* 2) Incremental fonts making use of the GlyphDirectory keyword         */
  26   /*    will be loaded, but the rendering will be using the TrueType       */
  27   /*    tables.                                                            */
  28   /* 3) As for Type1 fonts, CDevProc is not supported.                     */
  29   /* 4) The Metrics dictionary is not supported.                           */
  30   /* 5) AFM metrics are not supported.                                     */
  31   /*                                                                       */
  32   /* In other words, this driver supports Type42 fonts derived from        */
  33   /* TrueType fonts in a non-CID manner, as done by usual conversion       */
  34   /* programs.                                                             */
  35   /*                                                                       */
  36   /*************************************************************************/
  37
  38
  39 #include "t42drivr.h"
  40 #include "t42objs.h"
  41 #include "t42error.h"
  42 #include FT_INTERNAL_DEBUG_H
  43
  44 #include FT_SERVICE_XFREE86_NAME_H
  45 #include FT_SERVICE_GLYPH_DICT_H
  46 #include FT_SERVICE_POSTSCRIPT_NAME_H
  47 #include FT_SERVICE_POSTSCRIPT_INFO_H
  48
  49 #undef  FT_COMPONENT
  50 #define FT_COMPONENT  trace_t42
  51
  52
  53   /*
  54    *
  55    *  GLYPH DICT SERVICE
  56    *
  57    */
  58
  59   static FT_Error
  60   t42_get_glyph_name( T42_Face    face,
  61                       FT_UInt     glyph_index,
  62                       FT_Pointer  buffer,
  63                       FT_UInt     buffer_max )
  64   {
  65     FT_STRCPYN( buffer, face->type1.glyph_names[glyph_index], buffer_max );
  66
  67     return FT_Err_Ok;
  68   }
  69
  70
  71   static FT_UInt
  72   t42_get_name_index( T42_Face    face,
  73                       FT_String*  glyph_name )
  74   {
  75     FT_Int  i;
  76
  77
  78     for ( i = 0; i < face->type1.num_glyphs; i++ )
  79     {
  80       FT_String*  gname = face->type1.glyph_names[i];
  81
  82
  83       if ( glyph_name[0] == gname[0] && !ft_strcmp( glyph_name, gname ) )
  84         return (FT_UInt)ft_atol( (const char *)face->type1.charstrings[i] );
  85     }
  86
  87     return 0;
  88   }
  89
  90
  91   static const FT_Service_GlyphDictRec  t42_service_glyph_dict =
  92   {
  93     (FT_GlyphDict_GetNameFunc)  t42_get_glyph_name,
  94     (FT_GlyphDict_NameIndexFunc)t42_get_name_index
  95   };
  96
  97
  98   /*
  99    *
 100    *  POSTSCRIPT NAME SERVICE
 101    *
 102    */
 103
 104   static const char*
 105   t42_get_ps_font_name( T42_Face  face )
 106   {
 107     return (const char*)face->type1.font_name;
 108   }
 109
 110
 111   static const FT_Service_PsFontNameRec  t42_service_ps_font_name =
 112   {
 113     (FT_PsName_GetFunc)t42_get_ps_font_name
 114   };
 115
 116
 117   /*
 118    *
 119    *  POSTSCRIPT INFO SERVICE
 120    *
 121    */
 122
 123   static FT_Error
 124   t42_ps_get_font_info( FT_Face          face,
 125                         PS_FontInfoRec*  afont_info )
 126   {
 127     *afont_info = ((T42_Face)face)->type1.font_info;
 128
 129     return FT_Err_Ok;
 130   }
 131
 132
 133   static FT_Error
 134   t42_ps_get_font_extra( FT_Face           face,
 135                          PS_FontExtraRec*  afont_extra )
 136   {
 137     *afont_extra = ((T42_Face)face)->type1.font_extra;
 138
 139     return FT_Err_Ok;
 140   }
 141
 142
 143   static FT_Int
 144   t42_ps_has_glyph_names( FT_Face  face )
 145   {
 146     FT_UNUSED( face );
 147
 148     return 1;
 149   }
 150
 151
 152   static FT_Error
 153   t42_ps_get_font_private( FT_Face         face,
 154                            PS_PrivateRec*  afont_private )
 155   {
 156     *afont_private = ((T42_Face)face)->type1.private_dict;
 157
 158     return FT_Err_Ok;
 159   }
 160
 161
 162   static const FT_Service_PsInfoRec  t42_service_ps_info =
 163   {
 164     (PS_GetFontInfoFunc)   t42_ps_get_font_info,
 165     (PS_GetFontExtraFunc)  t42_ps_get_font_extra,
 166     (PS_HasGlyphNamesFunc) t42_ps_has_glyph_names,
 167     (PS_GetFontPrivateFunc)t42_ps_get_font_private,
 168     (PS_GetFontValueFunc)  NULL             /* not implemented */
 169   };
 170
 171
 172   /*
 173    *
 174    *  SERVICE LIST
 175    *
 176    */
 177
 178   static const FT_ServiceDescRec  t42_services[] =
 179   {
 180     { FT_SERVICE_ID_GLYPH_DICT,           &t42_service_glyph_dict },
 181     { FT_SERVICE_ID_POSTSCRIPT_FONT_NAME, &t42_service_ps_font_name },
 182     { FT_SERVICE_ID_POSTSCRIPT_INFO,      &t42_service_ps_info },
 183     { FT_SERVICE_ID_XF86_NAME,            FT_XF86_FORMAT_TYPE_42 },
 184     { NULL, NULL }
 185   };
 186
 187
 188   FT_CALLBACK_DEF( FT_Module_Interface )
 189   T42_Get_Interface( FT_Module         module,
 190                      const FT_String*  t42_interface )
 191   {
 192     FT_UNUSED( module );
 193
 194     return ft_service_list_lookup( t42_services, t42_interface );
 195   }
 196
 197
 198   const FT_Driver_ClassRec  t42_driver_class =
 199   {
 200     {
 201       FT_MODULE_FONT_DRIVER       |
 202       FT_MODULE_DRIVER_SCALABLE   |
 203 #ifdef TT_USE_BYTECODE_INTERPRETER
 204       FT_MODULE_DRIVER_HAS_HINTER,
 205 #else
 206       0,
 207 #endif
 208
 209       sizeof ( T42_DriverRec ),
 210
 211       "type42",
 212       0x10000L,
 213       0x20000L,
 214
 215       0,    /* format interface */
 216
 217       T42_Driver_Init,
 218       T42_Driver_Done,
 219       T42_Get_Interface,
 220     },
 221
 222     sizeof ( T42_FaceRec ),
 223     sizeof ( T42_SizeRec ),
 224     sizeof ( T42_GlyphSlotRec ),
 225
 226     T42_Face_Init,
 227     T42_Face_Done,
 228     T42_Size_Init,
 229     T42_Size_Done,
 230     T42_GlyphSlot_Init,
 231     T42_GlyphSlot_Done,
 232
 233     T42_GlyphSlot_Load,
 234
 235     0,                 /* FT_Face_GetKerningFunc  */
 236     0,                 /* FT_Face_AttachFunc      */
 237
 238     0,                 /* FT_Face_GetAdvancesFunc */
 239     T42_Size_Request,
 240     T42_Size_Select
 241   };
 242
 243
 244 /* END */