283 lines
8.8 KiB
C
283 lines
8.8 KiB
C
/***************************************************************************/
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/* */
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/* ftinit.c */
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/* */
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/* FreeType initialization layer (body). */
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/* */
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/* Copyright 1996-2002, 2005, 2007, 2009, 2012, 2013 by */
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/* David Turner, Robert Wilhelm, and Werner Lemberg. */
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/* */
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/* This file is part of the FreeType project, and may only be used, */
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/* modified, and distributed under the terms of the FreeType project */
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/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
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/* this file you indicate that you have read the license and */
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/* understand and accept it fully. */
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/* */
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/***************************************************************************/
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/*************************************************************************/
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/* */
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/* The purpose of this file is to implement the following two */
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/* functions: */
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/* */
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/* FT_Add_Default_Modules(): */
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/* This function is used to add the set of default modules to a */
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/* fresh new library object. The set is taken from the header file */
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/* `config/ftmodule.h'. See the document `FreeType 2.0 Build */
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/* System' for more information. */
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/* */
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/* FT_Init_FreeType(): */
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/* This function creates a system object for the current platform, */
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/* builds a library out of it, then calls FT_Default_Drivers(). */
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/* */
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/* Note that even if FT_Init_FreeType() uses the implementation of the */
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/* system object defined at build time, client applications are still */
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/* able to provide their own `ftsystem.c'. */
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/* */
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/*************************************************************************/
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#include <ft2build.h>
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#include FT_CONFIG_CONFIG_H
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#include FT_INTERNAL_OBJECTS_H
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#include FT_INTERNAL_DEBUG_H
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#include FT_MODULE_H
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#include "basepic.h"
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/*************************************************************************/
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/* */
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/* The macro FT_COMPONENT is used in trace mode. It is an implicit */
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/* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
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/* messages during execution. */
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/* */
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#undef FT_COMPONENT
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#define FT_COMPONENT trace_init
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#ifndef FT_CONFIG_OPTION_PIC
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#undef FT_USE_MODULE
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#ifdef __cplusplus
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#define FT_USE_MODULE( type, x ) extern "C" const type x;
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#else
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#define FT_USE_MODULE( type, x ) extern const type x;
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#endif
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#include FT_CONFIG_MODULES_H
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#undef FT_USE_MODULE
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#define FT_USE_MODULE( type, x ) (const FT_Module_Class*)&(x),
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static
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const FT_Module_Class* const ft_default_modules[] =
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{
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#include FT_CONFIG_MODULES_H
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0
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};
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#else /* FT_CONFIG_OPTION_PIC */
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#ifdef __cplusplus
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#define FT_EXTERNC extern "C"
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#else
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#define FT_EXTERNC extern
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#endif
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/* declare the module's class creation/destruction functions */
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#undef FT_USE_MODULE
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#define FT_USE_MODULE( type, x ) \
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FT_EXTERNC FT_Error \
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FT_Create_Class_ ## x( FT_Library library, \
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FT_Module_Class* *output_class ); \
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FT_EXTERNC void \
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FT_Destroy_Class_ ## x( FT_Library library, \
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FT_Module_Class* clazz );
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#include FT_CONFIG_MODULES_H
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/* count all module classes */
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#undef FT_USE_MODULE
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#define FT_USE_MODULE( type, x ) MODULE_CLASS_ ## x,
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enum
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{
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#include FT_CONFIG_MODULES_H
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FT_NUM_MODULE_CLASSES
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};
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/* destroy all module classes */
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#undef FT_USE_MODULE
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#define FT_USE_MODULE( type, x ) \
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if ( classes[i] ) \
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{ \
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FT_Destroy_Class_ ## x( library, classes[i] ); \
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} \
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i++;
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FT_BASE_DEF( void )
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ft_destroy_default_module_classes( FT_Library library )
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{
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FT_Module_Class* *classes;
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FT_Memory memory;
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FT_UInt i;
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BasePIC* pic_container = (BasePIC*)library->pic_container.base;
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if ( !pic_container->default_module_classes )
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return;
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memory = library->memory;
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classes = pic_container->default_module_classes;
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i = 0;
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#include FT_CONFIG_MODULES_H
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FT_FREE( classes );
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pic_container->default_module_classes = 0;
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}
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/* initialize all module classes and the pointer table */
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#undef FT_USE_MODULE
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#define FT_USE_MODULE( type, x ) \
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error = FT_Create_Class_ ## x( library, &clazz ); \
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if ( error ) \
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goto Exit; \
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classes[i++] = clazz;
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FT_BASE_DEF( FT_Error )
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ft_create_default_module_classes( FT_Library library )
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{
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FT_Error error;
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FT_Memory memory;
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FT_Module_Class* *classes = NULL;
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FT_Module_Class* clazz;
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FT_UInt i;
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BasePIC* pic_container = (BasePIC*)library->pic_container.base;
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memory = library->memory;
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pic_container->default_module_classes = 0;
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if ( FT_ALLOC( classes, sizeof ( FT_Module_Class* ) *
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( FT_NUM_MODULE_CLASSES + 1 ) ) )
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return error;
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/* initialize all pointers to 0, especially the last one */
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for ( i = 0; i < FT_NUM_MODULE_CLASSES; i++ )
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classes[i] = 0;
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classes[FT_NUM_MODULE_CLASSES] = 0;
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i = 0;
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#include FT_CONFIG_MODULES_H
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Exit:
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if ( error )
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ft_destroy_default_module_classes( library );
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else
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pic_container->default_module_classes = classes;
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return error;
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}
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#endif /* FT_CONFIG_OPTION_PIC */
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/* documentation is in ftmodapi.h */
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FT_EXPORT_DEF( void )
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FT_Add_Default_Modules( FT_Library library )
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{
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FT_Error error;
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const FT_Module_Class* const* cur;
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/* FT_DEFAULT_MODULES_GET dereferences `library' in PIC mode */
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#ifdef FT_CONFIG_OPTION_PIC
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if ( !library )
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return;
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#endif
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/* GCC 4.6 warns the type difference:
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* FT_Module_Class** != const FT_Module_Class* const*
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*/
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cur = (const FT_Module_Class* const*)FT_DEFAULT_MODULES_GET;
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/* test for valid `library' delayed to FT_Add_Module() */
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while ( *cur )
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{
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error = FT_Add_Module( library, *cur );
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/* notify errors, but don't stop */
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if ( error )
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FT_TRACE0(( "FT_Add_Default_Module:"
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" Cannot install `%s', error = 0x%x\n",
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(*cur)->module_name, error ));
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cur++;
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}
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}
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/* documentation is in freetype.h */
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FT_EXPORT_DEF( FT_Error )
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FT_Init_FreeType( FT_Library *alibrary )
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{
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FT_Error error;
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FT_Memory memory;
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/* First of all, allocate a new system object -- this function is part */
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/* of the system-specific component, i.e. `ftsystem.c'. */
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memory = FT_New_Memory();
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if ( !memory )
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{
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FT_ERROR(( "FT_Init_FreeType: cannot find memory manager\n" ));
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return FT_THROW( Unimplemented_Feature );
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}
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/* build a library out of it, then fill it with the set of */
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/* default drivers. */
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error = FT_New_Library( memory, alibrary );
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if ( error )
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FT_Done_Memory( memory );
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else
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FT_Add_Default_Modules( *alibrary );
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return error;
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}
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/* documentation is in freetype.h */
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FT_EXPORT_DEF( FT_Error )
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FT_Done_FreeType( FT_Library library )
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{
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if ( library )
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{
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FT_Memory memory = library->memory;
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/* Discard the library object */
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FT_Done_Library( library );
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/* discard memory manager */
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FT_Done_Memory( memory );
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}
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return FT_Err_Ok;
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}
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/* END */
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