1 /***************************************************************************/ 2 /* */ 3 /* t42drivr.c */ 4 /* */ 5 /* High-level Type 42 driver interface (body). */ 6 /* */ 7 /* Copyright 2002-2015 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_FONT_FORMAT_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, /* get_name */ 94 (FT_GlyphDict_NameIndexFunc)t42_get_name_index /* 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 /* 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, /* ps_get_font_info */ 165 (PS_GetFontExtraFunc) t42_ps_get_font_extra, /* ps_get_font_extra */ 166 (PS_HasGlyphNamesFunc) t42_ps_has_glyph_names, /* ps_has_glyph_names */ 167 (PS_GetFontPrivateFunc)t42_ps_get_font_private, /* ps_get_font_private */ 168 /* not implemented */ 169 (PS_GetFontValueFunc) NULL /* ps_get_font_value */ 170 }; 171 172 173 /* 174 * 175 * SERVICE LIST 176 * 177 */ 178 179 static const FT_ServiceDescRec t42_services[] = 180 { 181 { FT_SERVICE_ID_GLYPH_DICT, &t42_service_glyph_dict }, 182 { FT_SERVICE_ID_POSTSCRIPT_FONT_NAME, &t42_service_ps_font_name }, 183 { FT_SERVICE_ID_POSTSCRIPT_INFO, &t42_service_ps_info }, 184 { FT_SERVICE_ID_FONT_FORMAT, FT_FONT_FORMAT_TYPE_42 }, 185 { NULL, NULL } 186 }; 187 188 189 FT_CALLBACK_DEF( FT_Module_Interface ) 190 T42_Get_Interface( FT_Module module, 191 const FT_String* t42_interface ) 192 { 193 FT_UNUSED( module ); 194 195 return ft_service_list_lookup( t42_services, t42_interface ); 196 } 197 198 199 const FT_Driver_ClassRec t42_driver_class = 200 { 201 { 202 FT_MODULE_FONT_DRIVER | 203 FT_MODULE_DRIVER_SCALABLE | 204 #ifdef TT_USE_BYTECODE_INTERPRETER 205 FT_MODULE_DRIVER_HAS_HINTER, 206 #else 207 0, 208 #endif 209 210 sizeof ( T42_DriverRec ), 211 212 "type42", 213 0x10000L, 214 0x20000L, 215 216 0, /* module-specific interface */ 217 218 T42_Driver_Init, /* FT_Module_Constructor module_init */ 219 T42_Driver_Done, /* FT_Module_Destructor module_done */ 220 T42_Get_Interface, /* FT_Module_Requester get_interface */ 221 }, 222 223 sizeof ( T42_FaceRec ), 224 sizeof ( T42_SizeRec ), 225 sizeof ( T42_GlyphSlotRec ), 226 227 T42_Face_Init, /* FT_Face_InitFunc init_face */ 228 T42_Face_Done, /* FT_Face_DoneFunc done_face */ 229 T42_Size_Init, /* FT_Size_InitFunc init_size */ 230 T42_Size_Done, /* FT_Size_DoneFunc done_size */ 231 T42_GlyphSlot_Init, /* FT_Slot_InitFunc init_slot */ 232 T42_GlyphSlot_Done, /* FT_Slot_DoneFunc done_slot */ 233 234 T42_GlyphSlot_Load, /* FT_Slot_LoadFunc load_glyph */ 235 236 0, /* FT_Face_GetKerningFunc get_kerning */ 237 0, /* FT_Face_AttachFunc attach_file */ 238 0, /* FT_Face_GetAdvancesFunc get_advances */ 239 240 T42_Size_Request, /* FT_Size_RequestFunc request_size */ 241 T42_Size_Select /* FT_Size_SelectFunc select_size */ 242 }; 243 244 245 /* END */ 246
