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kc3-lang/freetype/src/base/ftinit.c
Werner Lemberg
- src/base/ftinit.c
-
/**************************************************************************** * * ftinit.c * * FreeType initialization layer (body). * * Copyright (C) 1996-2020 by * David Turner, Robert Wilhelm, and Werner Lemberg. * * This file is part of the FreeType project, and may only be used, * modified, and distributed under the terms of the FreeType project * license, LICENSE.TXT. By continuing to use, modify, or distribute * this file you indicate that you have read the license and * understand and accept it fully. * */ /************************************************************************** * * The purpose of this file is to implement the following two * functions: * * FT_Add_Default_Modules(): * This function is used to add the set of default modules to a * fresh new library object. The set is taken from the header file * `freetype/config/ftmodule.h'. See the document `FreeType 2.0 * Build System' for more information. * * FT_Init_FreeType(): * This function creates a system object for the current platform, * builds a library out of it, then calls FT_Default_Drivers(). * * Note that even if FT_Init_FreeType() uses the implementation of the * system object defined at build time, client applications are still * able to provide their own `ftsystem.c'. * */ #include <ft2build.h> #include FT_CONFIG_CONFIG_H #include FT_INTERNAL_OBJECTS_H #include FT_INTERNAL_DEBUG_H #include FT_MODULE_H /************************************************************************** * * The macro FT_COMPONENT is used in trace mode. It is an implicit * parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log * messages during execution. */ #undef FT_COMPONENT #define FT_COMPONENT init #undef FT_USE_MODULE #ifdef __cplusplus #define FT_USE_MODULE( type, x ) extern "C" const type x; #else #define FT_USE_MODULE( type, x ) extern const type x; #endif #include FT_CONFIG_MODULES_H #undef FT_USE_MODULE #define FT_USE_MODULE( type, x ) (const FT_Module_Class*)&(x), static const FT_Module_Class* const ft_default_modules[] = { #include FT_CONFIG_MODULES_H 0 }; /* documentation is in ftmodapi.h */ FT_EXPORT_DEF( void ) FT_Add_Default_Modules( FT_Library library ) { FT_Error error; const FT_Module_Class* const* cur; /* GCC 4.6 warns the type difference: * FT_Module_Class** != const FT_Module_Class* const* */ cur = (const FT_Module_Class* const*)ft_default_modules; /* test for valid `library' delayed to FT_Add_Module() */ while ( *cur ) { error = FT_Add_Module( library, *cur ); /* notify errors, but don't stop */ if ( error ) FT_TRACE0(( "FT_Add_Default_Module:" " Cannot install `%s', error = 0x%x\n", (*cur)->module_name, error )); cur++; } } #ifdef FT_CONFIG_OPTION_ENVIRONMENT_PROPERTIES #define MAX_LENGTH 128 /* documentation is in ftmodapi.h */ FT_EXPORT_DEF( void ) FT_Set_Default_Properties( FT_Library library ) { const char* env; const char* p; const char* q; char module_name[MAX_LENGTH + 1]; char property_name[MAX_LENGTH + 1]; char property_value[MAX_LENGTH + 1]; int i; env = ft_getenv( "FREETYPE_PROPERTIES" ); if ( !env ) return; for ( p = env; *p; p++ ) { /* skip leading whitespace and separators */ if ( *p == ' ' || *p == '\t' ) continue; /* read module name, followed by `:' */ q = p; for ( i = 0; i < MAX_LENGTH; i++ ) { if ( !*p || *p == ':' ) break; module_name[i] = *p++; } module_name[i] = '\0'; if ( !*p || *p != ':' || p == q ) break; /* read property name, followed by `=' */ q = ++p; for ( i = 0; i < MAX_LENGTH; i++ ) { if ( !*p || *p == '=' ) break; property_name[i] = *p++; } property_name[i] = '\0'; if ( !*p || *p != '=' || p == q ) break; /* read property value, followed by whitespace (if any) */ q = ++p; for ( i = 0; i < MAX_LENGTH; i++ ) { if ( !*p || *p == ' ' || *p == '\t' ) break; property_value[i] = *p++; } property_value[i] = '\0'; if ( !( *p == '\0' || *p == ' ' || *p == '\t' ) || p == q ) break; /* we completely ignore errors */ ft_property_string_set( library, module_name, property_name, property_value ); if ( !*p ) break; } } #else FT_EXPORT_DEF( void ) FT_Set_Default_Properties( FT_Library library ) { FT_UNUSED( library ); } #endif /* documentation is in freetype.h */ FT_EXPORT_DEF( FT_Error ) FT_Init_FreeType( FT_Library *alibrary ) { FT_Error error; FT_Memory memory; /* check of `alibrary' delayed to `FT_New_Library' */ /* First of all, allocate a new system object -- this function is part */ /* of the system-specific component, i.e. `ftsystem.c'. */ memory = FT_New_Memory(); if ( !memory ) { FT_ERROR(( "FT_Init_FreeType: cannot find memory manager\n" )); return FT_THROW( Unimplemented_Feature ); } /* build a library out of it, then fill it with the set of */ /* default drivers. */ error = FT_New_Library( memory, alibrary ); if ( error ) FT_Done_Memory( memory ); else FT_Add_Default_Modules( *alibrary ); FT_Set_Default_Properties( *alibrary ); return error; } /* documentation is in freetype.h */ FT_EXPORT_DEF( FT_Error ) FT_Done_FreeType( FT_Library library ) { FT_Memory memory; if ( !library ) return FT_THROW( Invalid_Library_Handle ); memory = library->memory; /* Discard the library object */ FT_Done_Library( library ); /* discard memory manager */ FT_Done_Memory( memory ); return FT_Err_Ok; } /* END */