1 /***************************************************************************/ 2 /* */ 3 /* ftinit.c */ 4 /* */ 5 /* FreeType initialization layer (body). */ 6 /* */ 7 /* Copyright 1996-2001, 2002, 2005, 2007, 2009 by */ 8 /* David Turner, Robert Wilhelm, and Werner Lemberg. */ 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 /* The purpose of this file is to implement the following two */ 21 /* functions: */ 22 /* */ 23 /* FT_Add_Default_Modules(): */ 24 /* This function is used to add the set of default modules to a */ 25 /* fresh new library object. The set is taken from the header file */ 26 /* `freetype/config/ftmodule.h'. See the document `FreeType 2.0 */ 27 /* Build System' for more information. */ 28 /* */ 29 /* FT_Init_FreeType(): */ 30 /* This function creates a system object for the current platform, */ 31 /* builds a library out of it, then calls FT_Default_Drivers(). */ 32 /* */ 33 /* Note that even if FT_Init_FreeType() uses the implementation of the */ 34 /* system object defined at build time, client applications are still */ 35 /* able to provide their own `ftsystem.c'. */ 36 /* */ 37 /*************************************************************************/ 38 39 40 #include <ft2build.h> 41 #include FT_CONFIG_CONFIG_H 42 #include FT_INTERNAL_OBJECTS_H 43 #include FT_INTERNAL_DEBUG_H 44 #include FT_MODULE_H 45 #include "basepic.h" 46 47 48 /*************************************************************************/ 49 /* */ 50 /* The macro FT_COMPONENT is used in trace mode. It is an implicit */ 51 /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */ 52 /* messages during execution. */ 53 /* */ 54 #undef FT_COMPONENT 55 #define FT_COMPONENT trace_init 56 57 #ifndef FT_CONFIG_OPTION_PIC 58 59 #undef FT_USE_MODULE 60 #ifdef __cplusplus 61 #define FT_USE_MODULE( type, x ) extern "C" const type x; 62 #else 63 #define FT_USE_MODULE( type, x ) extern const type x; 64 #endif 65 66 67 #include FT_CONFIG_MODULES_H 68 69 70 #undef FT_USE_MODULE 71 #define FT_USE_MODULE( type, x ) (const FT_Module_Class*)&(x), 72 73 static 74 const FT_Module_Class* const ft_default_modules[] = 75 { 76 #include FT_CONFIG_MODULES_H 77 0 78 }; 79 80 #else /* FT_CONFIG_OPTION_PIC */ 81 82 #ifdef __cplusplus 83 #define FT_EXTERNC extern "C" 84 #else 85 #define FT_EXTERNC extern 86 #endif 87 88 /* declare the module's class creation/destruction functions */ 89 #undef FT_USE_MODULE 90 #define FT_USE_MODULE( type, x ) \ 91 FT_EXTERNC FT_Error FT_Create_Class_##x( FT_Library library, FT_Module_Class** output_class ); \ 92 FT_EXTERNC void FT_Destroy_Class_##x( FT_Library library, FT_Module_Class* clazz ); 93 94 #include FT_CONFIG_MODULES_H 95 96 97 /* count all module classes */ 98 #undef FT_USE_MODULE 99 #define FT_USE_MODULE( type, x ) MODULE_CLASS_##x, 100 101 enum 102 { 103 #include FT_CONFIG_MODULES_H 104 FT_NUM_MODULE_CLASSES 105 }; 106 107 /* destroy all module classes */ 108 #undef FT_USE_MODULE 109 #define FT_USE_MODULE( type, x ) \ 110 if ( classes[i] ) { FT_Destroy_Class_##x(library, classes[i]); } \ 111 i++; \ 112 113 FT_BASE_DEF( void ) 114 ft_destroy_default_module_classes( FT_Library library ) 115 { 116 FT_Module_Class** classes; 117 FT_Memory memory; 118 FT_UInt i; 119 BasePIC* pic_container = (BasePIC*)library->pic_container.base; 120 121 if ( !pic_container->default_module_classes ) 122 return; 123 124 memory = library->memory; 125 classes = pic_container->default_module_classes; 126 i = 0; 127 128 #include FT_CONFIG_MODULES_H 129 130 FT_FREE( classes ); 131 pic_container->default_module_classes = 0; 132 } 133 134 /* initialize all module classes and the pointer table */ 135 #undef FT_USE_MODULE 136 #define FT_USE_MODULE( type, x ) \ 137 error = FT_Create_Class_##x(library, &clazz); \ 138 if (error) goto Exit; \ 139 classes[i++] = clazz; 140 141 FT_BASE_DEF( FT_Error ) 142 ft_create_default_module_classes( FT_Library library ) 143 { 144 FT_Error error; 145 FT_Memory memory; 146 FT_Module_Class** classes; 147 FT_Module_Class* clazz; 148 FT_UInt i; 149 BasePIC* pic_container = (BasePIC*)library->pic_container.base; 150 151 memory = library->memory; 152 pic_container->default_module_classes = 0; 153 154 if ( FT_ALLOC(classes, sizeof(FT_Module_Class*) * (FT_NUM_MODULE_CLASSES + 1) ) ) 155 return error; 156 /* initialize all pointers to 0, especially the last one */ 157 for (i = 0; i < FT_NUM_MODULE_CLASSES; i++) 158 classes[i] = 0; 159 classes[FT_NUM_MODULE_CLASSES] = 0; 160 161 i = 0; 162 163 #include FT_CONFIG_MODULES_H 164 165 Exit: 166 if (error) ft_destroy_default_module_classes( library ); 167 else pic_container->default_module_classes = classes; 168 169 return error; 170 } 171 172 173 #endif /* FT_CONFIG_OPTION_PIC */ 174 175 /* documentation is in ftmodapi.h */ 176 177 FT_EXPORT_DEF( void ) 178 FT_Add_Default_Modules( FT_Library library ) 179 { 180 FT_Error error; 181 const FT_Module_Class* const* cur; 182 183 184 /* test for valid `library' delayed to FT_Add_Module() */ 185 186 cur = FT_DEFAULT_MODULES_GET; 187 while ( *cur ) 188 { 189 error = FT_Add_Module( library, *cur ); 190 /* notify errors, but don't stop */ 191 if ( error ) 192 FT_TRACE0(( "FT_Add_Default_Module:" 193 " Cannot install `%s', error = 0x%x\n", 194 (*cur)->module_name, error )); 195 cur++; 196 } 197 } 198 199 200 /* documentation is in freetype.h */ 201 202 FT_EXPORT_DEF( FT_Error ) 203 FT_Init_FreeType( FT_Library *alibrary ) 204 { 205 FT_Error error; 206 FT_Memory memory; 207 208 209 /* First of all, allocate a new system object -- this function is part */ 210 /* of the system-specific component, i.e. `ftsystem.c'. */ 211 212 memory = FT_New_Memory(); 213 if ( !memory ) 214 { 215 FT_ERROR(( "FT_Init_FreeType: cannot find memory manager\n" )); 216 return FT_Err_Unimplemented_Feature; 217 } 218 219 /* build a library out of it, then fill it with the set of */ 220 /* default drivers. */ 221 222 error = FT_New_Library( memory, alibrary ); 223 if ( error ) 224 FT_Done_Memory( memory ); 225 else 226 FT_Add_Default_Modules( *alibrary ); 227 228 return error; 229 } 230 231 232 /* documentation is in freetype.h */ 233 234 FT_EXPORT_DEF( FT_Error ) 235 FT_Done_FreeType( FT_Library library ) 236 { 237 if ( library ) 238 { 239 FT_Memory memory = library->memory; 240 241 242 /* Discard the library object */ 243 FT_Done_Library( library ); 244 245 /* discard memory manager */ 246 FT_Done_Memory( memory ); 247 } 248 249 return FT_Err_Ok; 250 } 251 252 253 /* END */ 254
