1 /**************************************************************************** 2 * 3 * t42drivr.c 4 * 5 * High-level Type 42 driver interface (body). 6 * 7 * Copyright 2002-2018 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_strtol( (const char *)face->type1.charstrings[i], 85 NULL, 10 ); 86 } 87 88 return 0; 89 } 90 91 92 static const FT_Service_GlyphDictRec t42_service_glyph_dict = 93 { 94 (FT_GlyphDict_GetNameFunc) t42_get_glyph_name, /* get_name */ 95 (FT_GlyphDict_NameIndexFunc)t42_get_name_index /* name_index */ 96 }; 97 98 99 /* 100 * 101 * POSTSCRIPT NAME SERVICE 102 * 103 */ 104 105 static const char* 106 t42_get_ps_font_name( T42_Face face ) 107 { 108 return (const char*)face->type1.font_name; 109 } 110 111 112 static const FT_Service_PsFontNameRec t42_service_ps_font_name = 113 { 114 (FT_PsName_GetFunc)t42_get_ps_font_name /* get_ps_font_name */ 115 }; 116 117 118 /* 119 * 120 * POSTSCRIPT INFO SERVICE 121 * 122 */ 123 124 static FT_Error 125 t42_ps_get_font_info( FT_Face face, 126 PS_FontInfoRec* afont_info ) 127 { 128 *afont_info = ((T42_Face)face)->type1.font_info; 129 130 return FT_Err_Ok; 131 } 132 133 134 static FT_Error 135 t42_ps_get_font_extra( FT_Face face, 136 PS_FontExtraRec* afont_extra ) 137 { 138 *afont_extra = ((T42_Face)face)->type1.font_extra; 139 140 return FT_Err_Ok; 141 } 142 143 144 static FT_Int 145 t42_ps_has_glyph_names( FT_Face face ) 146 { 147 FT_UNUSED( face ); 148 149 return 1; 150 } 151 152 153 static FT_Error 154 t42_ps_get_font_private( FT_Face face, 155 PS_PrivateRec* afont_private ) 156 { 157 *afont_private = ((T42_Face)face)->type1.private_dict; 158 159 return FT_Err_Ok; 160 } 161 162 163 static const FT_Service_PsInfoRec t42_service_ps_info = 164 { 165 (PS_GetFontInfoFunc) t42_ps_get_font_info, /* ps_get_font_info */ 166 (PS_GetFontExtraFunc) t42_ps_get_font_extra, /* ps_get_font_extra */ 167 (PS_HasGlyphNamesFunc) t42_ps_has_glyph_names, /* ps_has_glyph_names */ 168 (PS_GetFontPrivateFunc)t42_ps_get_font_private, /* ps_get_font_private */ 169 /* not implemented */ 170 (PS_GetFontValueFunc) NULL /* ps_get_font_value */ 171 }; 172 173 174 /* 175 * 176 * SERVICE LIST 177 * 178 */ 179 180 static const FT_ServiceDescRec t42_services[] = 181 { 182 { FT_SERVICE_ID_GLYPH_DICT, &t42_service_glyph_dict }, 183 { FT_SERVICE_ID_POSTSCRIPT_FONT_NAME, &t42_service_ps_font_name }, 184 { FT_SERVICE_ID_POSTSCRIPT_INFO, &t42_service_ps_info }, 185 { FT_SERVICE_ID_FONT_FORMAT, FT_FONT_FORMAT_TYPE_42 }, 186 { NULL, NULL } 187 }; 188 189 190 FT_CALLBACK_DEF( FT_Module_Interface ) 191 T42_Get_Interface( FT_Module module, 192 const FT_String* t42_interface ) 193 { 194 FT_UNUSED( module ); 195 196 return ft_service_list_lookup( t42_services, t42_interface ); 197 } 198 199 200 const FT_Driver_ClassRec t42_driver_class = 201 { 202 { 203 FT_MODULE_FONT_DRIVER | 204 FT_MODULE_DRIVER_SCALABLE | 205 #ifdef TT_USE_BYTECODE_INTERPRETER 206 FT_MODULE_DRIVER_HAS_HINTER, 207 #else 208 0, 209 #endif 210 211 sizeof ( T42_DriverRec ), 212 213 "type42", 214 0x10000L, 215 0x20000L, 216 217 NULL, /* module-specific interface */ 218 219 T42_Driver_Init, /* FT_Module_Constructor module_init */ 220 T42_Driver_Done, /* FT_Module_Destructor module_done */ 221 T42_Get_Interface, /* FT_Module_Requester get_interface */ 222 }, 223 224 sizeof ( T42_FaceRec ), 225 sizeof ( T42_SizeRec ), 226 sizeof ( T42_GlyphSlotRec ), 227 228 T42_Face_Init, /* FT_Face_InitFunc init_face */ 229 T42_Face_Done, /* FT_Face_DoneFunc done_face */ 230 T42_Size_Init, /* FT_Size_InitFunc init_size */ 231 T42_Size_Done, /* FT_Size_DoneFunc done_size */ 232 T42_GlyphSlot_Init, /* FT_Slot_InitFunc init_slot */ 233 T42_GlyphSlot_Done, /* FT_Slot_DoneFunc done_slot */ 234 235 T42_GlyphSlot_Load, /* FT_Slot_LoadFunc load_glyph */ 236 237 NULL, /* FT_Face_GetKerningFunc get_kerning */ 238 NULL, /* FT_Face_AttachFunc attach_file */ 239 NULL, /* FT_Face_GetAdvancesFunc get_advances */ 240 241 T42_Size_Request, /* FT_Size_RequestFunc request_size */ 242 T42_Size_Select /* FT_Size_SelectFunc select_size */ 243 }; 244 245 246 /* END */ 247
