170 lines
6.7 KiB
C
170 lines
6.7 KiB
C
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/***************************************************************************/
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/* */
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/* ftinit.c */
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/* */
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/* FreeType initialisation layer (body). */
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/* */
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/* Copyright 1996-1999 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 three following
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* functions:
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*
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* FT_Default_Drivers:
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* This function is used to add the set of default drivers
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* to a fresh new library object. The set is computed at compile
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* time from the Makefiles inclusions in Makefile.lib. See the
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* document "FreeType Internals" for more info.
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*
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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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*
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* FT_Done_FreeType:
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* This function simply finalise the library and the corresponding
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* system object.
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*
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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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*
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*
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*
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************************************************************************/
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#include <ftobjs.h>
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#include <ftdriver.h>
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#include <ftconfig.h>
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#include <ftdebug.h>
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#undef FT_COMPONENT
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#define FT_COMPONENT trace_init
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/*************************************************************************/
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/* */
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/* The macros FT_SUPPORT_xxxx are defined by Makefile.lib when this file */
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/* is compiled. They come from a make variable called FTINIT_MACROS */
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/* which is updated by each driver Makefile. */
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/* */
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/* This means that when a driver isn't part of the build, ftinit.o */
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/* won't try to reference it. */
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/* */
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/*************************************************************************/
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#define FTINIT_DRIVER_CHAIN
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#define FT_INIT_LAST_DRIVER_CHAIN ((FT_DriverChain*) 0)
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/* Include the SFNT driver interface if needed */
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#ifdef FT_SUPPORT_SFNT
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#include "sfdriver.h"
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#endif
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/* Include the TrueType driver interface if needed */
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#ifdef FT_SUPPORT_TRUETYPE
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#include "ttdriver.h"
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#endif
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/* Include the Type1 driver interface if needed */
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#ifdef FT_SUPPORT_TYPE1
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#include "t1driver.h"
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#endif
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/*************************************************************************/
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/* */
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/* <Function> */
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/* FT_Default_Drivers */
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/* */
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/* <Description> */
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/* Adds the set of default drivers to a given library object. */
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/* */
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/* <Input> */
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/* library :: A handle to a new library object. */
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/* */
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EXPORT_FUNC
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void FT_Default_Drivers( FT_Library library )
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{
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FT_Error error;
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const FT_DriverChain* chain = FT_INIT_LAST_DRIVER_CHAIN;
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while (chain)
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{
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error = FT_Add_Driver( library, chain->interface );
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/* notify errors, but don't stop */
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if (error)
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{
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FT_ERROR(( "FT.Default_Drivers: cannot install `%s', error = %x\n",
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chain->interface->driver_name,
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error ));
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}
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chain = chain->next;
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error = 0; /* clear error */
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}
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}
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/*************************************************************************/
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/* */
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/* <Function> */
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/* FT_Init_FreeType */
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/* */
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/* <Description> */
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/* Initializes a new FreeType library object. The set of drivers */
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/* that are registered by this function is determined at build time. */
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/* */
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/* <Output> */
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/* library :: A handle to a new library object. */
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/* */
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/* <Return> */
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/* Error code. 0 means success. */
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/* */
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EXPORT_FUNC
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FT_Error FT_Init_FreeType( 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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/* 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:" ));
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FT_ERROR(( " cannot find memory manager" ));
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return FT_Err_Unimplemented_Feature;
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}
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/* builds 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, library );
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if ( !error )
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FT_Default_Drivers(*library);
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return error;
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}
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/* END */
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