apdf/freetype2/type42/t42drivr.c

   1 /***************************************************************************/
   2 /*                                                                         */
   3 /*  t42drivr.c                                                             */
   4 /*                                                                         */
   5 /*    High-level Type 42 driver interface (body).                          */
   6 /*                                                                         */
   7 /*  Copyright 2002 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) The sfnts array is expected to be ASCII, not binary.               */
  28   /* 4) As for Type1 fonts, CDevProc is not supported.                     */
  29   /* 5) The Metrics dictionary is not supported.                           */
  30   /* 6) 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
  45 #undef  FT_COMPONENT
  46 #define FT_COMPONENT  trace_t42
  47
  48
  49   static FT_Error
  50   t42_get_glyph_name( T42_Face    face,
  51                       FT_UInt     glyph_index,
  52                       FT_Pointer  buffer,
  53                       FT_UInt     buffer_max )
  54   {
  55     FT_String*  gname;
  56
  57
  58     gname = face->type1.glyph_names[glyph_index];
  59
  60     if ( buffer_max > 0 )
  61     {
  62       FT_UInt  len = (FT_UInt)( ft_strlen( gname ) );
  63
  64
  65       if ( len >= buffer_max )
  66         len = buffer_max - 1;
  67
  68       FT_MEM_COPY( buffer, gname, len );
  69       ((FT_Byte*)buffer)[len] = 0;
  70     }
  71
  72     return T42_Err_Ok;
  73   }
  74
  75
  76   static const char*
  77   t42_get_ps_name( T42_Face  face )
  78   {
  79     return (const char*)face->type1.font_name;
  80   }
  81
  82
  83   static FT_UInt
  84   t42_get_name_index( T42_Face    face,
  85                       FT_String*  glyph_name )
  86   {
  87     FT_Int      i;
  88     FT_String*  gname;
  89
  90
  91     for ( i = 0; i < face->type1.num_glyphs; i++ )
  92     {
  93       gname = face->type1.glyph_names[i];
  94
  95       if ( !ft_strcmp( glyph_name, gname ) )
  96         return ft_atoi( (const char *)face->type1.charstrings[i] );
  97     }
  98
  99     return 0;
 100   }
 101
 102
 103   static FT_Module_Interface
 104   T42_Get_Interface( FT_Driver         driver,
 105                      const FT_String*  t42_interface )
 106   {
 107     FT_UNUSED( driver );
 108
 109     /* Any additional interface are defined here */
 110     if (ft_strcmp( (const char*)t42_interface, "glyph_name" ) == 0 )
 111       return (FT_Module_Interface)t42_get_glyph_name;
 112
 113     if ( ft_strcmp( (const char*)t42_interface, "name_index" ) == 0 )
 114       return (FT_Module_Interface)t42_get_name_index;
 115
 116     if ( ft_strcmp( (const char*)t42_interface, "postscript_name" ) == 0 )
 117       return (FT_Module_Interface)t42_get_ps_name;
 118
 119     return 0;
 120   }
 121
 122
 123   const FT_Driver_ClassRec  t42_driver_class =
 124   {
 125     {
 126       ft_module_font_driver      |
 127       ft_module_driver_scalable  |
 128 #ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER
 129       ft_module_driver_has_hinter,
 130 #else
 131       0,
 132 #endif
 133
 134       sizeof ( T42_DriverRec ),
 135
 136       "type42",
 137       0x10000L,
 138       0x20000L,
 139
 140       0,    /* format interface */
 141
 142       (FT_Module_Constructor)T42_Driver_Init,
 143       (FT_Module_Destructor) T42_Driver_Done,
 144       (FT_Module_Requester)  T42_Get_Interface,
 145     },
 146
 147     sizeof ( T42_FaceRec ),
 148     sizeof ( T42_SizeRec ),
 149     sizeof ( T42_GlyphSlotRec ),
 150
 151     (FT_Face_InitFunc)        T42_Face_Init,
 152     (FT_Face_DoneFunc)        T42_Face_Done,
 153     (FT_Size_InitFunc)        T42_Size_Init,
 154     (FT_Size_DoneFunc)        T42_Size_Done,
 155     (FT_Slot_InitFunc)        T42_GlyphSlot_Init,
 156     (FT_Slot_DoneFunc)        T42_GlyphSlot_Done,
 157
 158     (FT_Size_ResetPointsFunc) T42_Size_SetChars,
 159     (FT_Size_ResetPixelsFunc) T42_Size_SetPixels,
 160     (FT_Slot_LoadFunc)        T42_GlyphSlot_Load,
 161     (FT_CharMap_CharIndexFunc)T42_CMap_CharIndex,
 162
 163     (FT_Face_GetKerningFunc)  0,
 164     (FT_Face_AttachFunc)      0,
 165
 166     (FT_Face_GetAdvancesFunc) 0,
 167
 168     (FT_CharMap_CharNextFunc) T42_CMap_CharNext,
 169   };
 170
 171
 172 /* END */