src/third_party/freetype2/src/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 by Roberto Alameda.        */
   8 /*                                                                         */
   9 /*  This file is part of the FreeType project, and may only be used,       */
  10 /*  modified, and distributed under the terms of the FreeType project      */
  11 /*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */
  12 /*  this file you indicate that you have read the license and              */
  13 /*  understand and accept it fully.                                        */
  14 /*                                                                         */
  15 /***************************************************************************/
  16
  17
  18   /*************************************************************************/
  19   /*                                                                       */
  20   /* This driver implements Type42 fonts as described in the               */
  21   /* Technical Note #5012 from Adobe, with these limitations:              */
  22   /*                                                                       */
  23   /* 1) CID Fonts are not currently supported.                             */
  24   /* 2) Incremental fonts making use of the GlyphDirectory keyword         */
  25   /*    will be loaded, but the rendering will be using the TrueType       */
  26   /*    tables.                                                            */
  27   /* 3) As for Type1 fonts, CDevProc is not supported.                     */
  28   /* 4) The Metrics dictionary is not supported.                           */
  29   /* 5) AFM metrics are not supported.                                     */
  30   /*                                                                       */
  31   /* In other words, this driver supports Type42 fonts derived from        */
  32   /* TrueType fonts in a non-CID manner, as done by usual conversion       */
  33   /* programs.                                                             */
  34   /*                                                                       */
  35   /*************************************************************************/
  36
  37
  38 #include "t42drivr.h"
  39 #include "t42objs.h"
  40 #include "t42error.h"
  41 #include FT_INTERNAL_DEBUG_H
  42
  43 #include FT_SERVICE_XFREE86_NAME_H
  44 #include FT_SERVICE_GLYPH_DICT_H
  45 #include FT_SERVICE_POSTSCRIPT_NAME_H
  46 #include FT_SERVICE_POSTSCRIPT_INFO_H
  47
  48 #undef  FT_COMPONENT
  49 #define FT_COMPONENT  trace_t42
  50
  51
  52   /*
  53    *
  54    *  GLYPH DICT SERVICE
  55    *
  56    */
  57
  58   static FT_Error
  59   t42_get_glyph_name( T42_Face    face,
  60                       FT_UInt     glyph_index,
  61                       FT_Pointer  buffer,
  62                       FT_UInt     buffer_max )
  63   {
  64     FT_STRCPYN( buffer, face->type1.glyph_names[glyph_index], buffer_max );
  65
  66     return T42_Err_Ok;
  67   }
  68
  69
  70   static FT_UInt
  71   t42_get_name_index( T42_Face    face,
  72                       FT_String*  glyph_name )
  73   {
  74     FT_Int      i;
  75     FT_String*  gname;
  76
  77
  78     for ( i = 0; i < face->type1.num_glyphs; i++ )
  79     {
  80       gname = face->type1.glyph_names[i];
  81
  82       if ( glyph_name[0] == gname[0] && !ft_strcmp( glyph_name, gname ) )
  83         return (FT_UInt)ft_atol( (const char *)face->type1.charstrings[i] );
  84     }
  85
  86     return 0;
  87   }
  88
  89
  90   static const FT_Service_GlyphDictRec  t42_service_glyph_dict =
  91   {
  92     (FT_GlyphDict_GetNameFunc)  t42_get_glyph_name,
  93     (FT_GlyphDict_NameIndexFunc)t42_get_name_index
  94   };
  95
  96
  97   /*
  98    *
  99    *  POSTSCRIPT NAME SERVICE
 100    *
 101    */
 102
 103   static const char*
 104   t42_get_ps_font_name( T42_Face  face )
 105   {
 106     return (const char*)face->type1.font_name;
 107   }
 108
 109
 110   static const FT_Service_PsFontNameRec  t42_service_ps_font_name =
 111   {
 112     (FT_PsName_GetFunc)t42_get_ps_font_name
 113   };
 114
 115
 116   /*
 117    *
 118    *  POSTSCRIPT INFO SERVICE
 119    *
 120    */
 121
 122   static FT_Error
 123   t42_ps_get_font_info( FT_Face          face,
 124                         PS_FontInfoRec*  afont_info )
 125   {
 126     *afont_info = ((T42_Face)face)->type1.font_info;
 127
 128     return T42_Err_Ok;
 129   }
 130
 131
 132   static FT_Error
 133   t42_ps_get_font_extra( FT_Face           face,
 134                          PS_FontExtraRec*  afont_extra )
 135   {
 136     *afont_extra = ((T42_Face)face)->type1.font_extra;
 137
 138     return T42_Err_Ok;
 139   }
 140
 141
 142   static FT_Int
 143   t42_ps_has_glyph_names( FT_Face  face )
 144   {
 145     FT_UNUSED( face );
 146
 147     return 1;
 148   }
 149
 150
 151   static FT_Error
 152   t42_ps_get_font_private( FT_Face         face,
 153                            PS_PrivateRec*  afont_private )
 154   {
 155     *afont_private = ((T42_Face)face)->type1.private_dict;
 156
 157     return T42_Err_Ok;
 158   }
 159
 160
 161   static const FT_Service_PsInfoRec  t42_service_ps_info =
 162   {
 163     (PS_GetFontInfoFunc)   t42_ps_get_font_info,
 164     (PS_GetFontExtraFunc)  t42_ps_get_font_extra,
 165     (PS_HasGlyphNamesFunc) t42_ps_has_glyph_names,
 166     (PS_GetFontPrivateFunc)t42_ps_get_font_private,
 167     (PS_GetFontValueFunc)  NULL             /* not implemented */
 168   };
 169
 170
 171   /*
 172    *
 173    *  SERVICE LIST
 174    *
 175    */
 176
 177   static const FT_ServiceDescRec  t42_services[] =
 178   {
 179     { FT_SERVICE_ID_GLYPH_DICT,           &t42_service_glyph_dict },
 180     { FT_SERVICE_ID_POSTSCRIPT_FONT_NAME, &t42_service_ps_font_name },
 181     { FT_SERVICE_ID_POSTSCRIPT_INFO,      &t42_service_ps_info },
 182     { FT_SERVICE_ID_XF86_NAME,            FT_XF86_FORMAT_TYPE_42 },
 183     { NULL, NULL }
 184   };
 185
 186
 187   static FT_Module_Interface
 188   T42_Get_Interface( FT_Driver         driver,
 189                      const FT_String*  t42_interface )
 190   {
 191     FT_UNUSED( driver );
 192
 193     return ft_service_list_lookup( t42_services, t42_interface );
 194   }
 195
 196
 197   const FT_Driver_ClassRec  t42_driver_class =
 198   {
 199     {
 200       FT_MODULE_FONT_DRIVER       |
 201       FT_MODULE_DRIVER_SCALABLE   |
 202 #ifdef TT_USE_BYTECODE_INTERPRETER
 203       FT_MODULE_DRIVER_HAS_HINTER,
 204 #else
 205       0,
 206 #endif
 207
 208       sizeof ( T42_DriverRec ),
 209
 210       "type42",
 211       0x10000L,
 212       0x20000L,
 213
 214       0,    /* format interface */
 215
 216       (FT_Module_Constructor)T42_Driver_Init,
 217       (FT_Module_Destructor) T42_Driver_Done,
 218       (FT_Module_Requester)  T42_Get_Interface,
 219     },
 220
 221     sizeof ( T42_FaceRec ),
 222     sizeof ( T42_SizeRec ),
 223     sizeof ( T42_GlyphSlotRec ),
 224
 225     (FT_Face_InitFunc)        T42_Face_Init,
 226     (FT_Face_DoneFunc)        T42_Face_Done,
 227     (FT_Size_InitFunc)        T42_Size_Init,
 228     (FT_Size_DoneFunc)        T42_Size_Done,
 229     (FT_Slot_InitFunc)        T42_GlyphSlot_Init,
 230     (FT_Slot_DoneFunc)        T42_GlyphSlot_Done,
 231
 232 #ifdef FT_CONFIG_OPTION_OLD_INTERNALS
 233     ft_stub_set_char_sizes,
 234     ft_stub_set_pixel_sizes,
 235 #endif
 236     (FT_Slot_LoadFunc)        T42_GlyphSlot_Load,
 237
 238     (FT_Face_GetKerningFunc)  0,
 239     (FT_Face_AttachFunc)      0,
 240
 241     (FT_Face_GetAdvancesFunc) 0,
 242     (FT_Size_RequestFunc)     T42_Size_Request,
 243     (FT_Size_SelectFunc)      T42_Size_Select
 244   };
 245
 246
 247 /* END */