/**************************************************************************** * * ftmoderr.h * * FreeType module error offsets (specification). * * Copyright (C) 2001-2023 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. * */ /************************************************************************** * * This file is used to define the FreeType module error codes. * * If the macro `FT_CONFIG_OPTION_USE_MODULE_ERRORS` in `ftoption.h` is * set, the lower byte of an error value identifies the error code as * usual. In addition, the higher byte identifies the module. For * example, the error `FT_Err_Invalid_File_Format` has value 0x0003, the * error `TT_Err_Invalid_File_Format` has value 0x1303, the error * `T1_Err_Invalid_File_Format` has value 0x1403, etc. * * Note that `FT_Err_Ok`, `TT_Err_Ok`, etc. are always equal to zero, * including the high byte. * * If `FT_CONFIG_OPTION_USE_MODULE_ERRORS` isn't set, the higher byte of an * error value is set to zero. * * To hide the various `XXX_Err_` prefixes in the source code, FreeType * provides some macros in `fttypes.h`. * * FT_ERR( err ) * * Add current error module prefix (as defined with the `FT_ERR_PREFIX` * macro) to `err`. For example, in the BDF module the line * * ``` * error = FT_ERR( Invalid_Outline ); * ``` * * expands to * * ``` * error = BDF_Err_Invalid_Outline; * ``` * * For simplicity, you can always use `FT_Err_Ok` directly instead of * `FT_ERR( Ok )`. * * FT_ERR_EQ( errcode, err ) * FT_ERR_NEQ( errcode, err ) * * Compare error code `errcode` with the error `err` for equality and * inequality, respectively. Example: * * ``` * if ( FT_ERR_EQ( error, Invalid_Outline ) ) * ... * ``` * * Using this macro you don't have to think about error prefixes. Of * course, if module errors are not active, the above example is the * same as * * ``` * if ( error == FT_Err_Invalid_Outline ) * ... * ``` * * FT_ERROR_BASE( errcode ) * FT_ERROR_MODULE( errcode ) * * Get base error and module error code, respectively. * * It can also be used to create a module error message table easily with * something like * * ``` * #undef FTMODERR_H_ * #define FT_MODERRDEF( e, v, s ) { FT_Mod_Err_ ## e, s }, * #define FT_MODERR_START_LIST { * #define FT_MODERR_END_LIST { 0, 0 } }; * * const struct * { * int mod_err_offset; * const char* mod_err_msg * } ft_mod_errors[] = * * #include <freetype/ftmoderr.h> * ``` * */ #ifndef FTMODERR_H_ #define FTMODERR_H_ /*******************************************************************/ /*******************************************************************/ /***** *****/ /***** SETUP MACROS *****/ /***** *****/ /*******************************************************************/ /*******************************************************************/ #undef FT_NEED_EXTERN_C #ifndef FT_MODERRDEF #ifdef FT_CONFIG_OPTION_USE_MODULE_ERRORS #define FT_MODERRDEF … #else #define FT_MODERRDEF … #endif #define FT_MODERR_START_LIST … #define FT_MODERR_END_LIST … #ifdef __cplusplus #define FT_NEED_EXTERN_C extern "C" { #endif #endif /* !FT_MODERRDEF */ /*******************************************************************/ /*******************************************************************/ /***** *****/ /***** LIST MODULE ERROR BASES *****/ /***** *****/ /*******************************************************************/ /*******************************************************************/ #ifdef FT_MODERR_START_LIST FT_MODERR_START_LIST #endif FT_MODERRDEF( Base, 0x000, "base module" ) FT_MODERRDEF( Autofit, 0x100, "autofitter module" ) FT_MODERRDEF( BDF, 0x200, "BDF module" ) FT_MODERRDEF( Bzip2, 0x300, "Bzip2 module" ) FT_MODERRDEF( Cache, 0x400, "cache module" ) FT_MODERRDEF( CFF, 0x500, "CFF module" ) FT_MODERRDEF( CID, 0x600, "CID module" ) FT_MODERRDEF( Gzip, 0x700, "Gzip module" ) FT_MODERRDEF( LZW, 0x800, "LZW module" ) FT_MODERRDEF( OTvalid, 0x900, "OpenType validation module" ) FT_MODERRDEF( PCF, 0xA00, "PCF module" ) FT_MODERRDEF( PFR, 0xB00, "PFR module" ) FT_MODERRDEF( PSaux, 0xC00, "PS auxiliary module" ) FT_MODERRDEF( PShinter, 0xD00, "PS hinter module" ) FT_MODERRDEF( PSnames, 0xE00, "PS names module" ) FT_MODERRDEF( Raster, 0xF00, "raster module" ) FT_MODERRDEF( SFNT, 0x1000, "SFNT module" ) FT_MODERRDEF( Smooth, 0x1100, "smooth raster module" ) FT_MODERRDEF( TrueType, 0x1200, "TrueType module" ) FT_MODERRDEF( Type1, 0x1300, "Type 1 module" ) FT_MODERRDEF( Type42, 0x1400, "Type 42 module" ) FT_MODERRDEF( Winfonts, 0x1500, "Windows FON/FNT module" ) FT_MODERRDEF( GXvalid, 0x1600, "GX validation module" ) FT_MODERRDEF( Sdf, 0x1700, "Signed distance field raster module" ) #ifdef FT_MODERR_END_LIST FT_MODERR_END_LIST #endif /*******************************************************************/ /*******************************************************************/ /***** *****/ /***** CLEANUP *****/ /***** *****/ /*******************************************************************/ /*******************************************************************/ #ifdef FT_NEED_EXTERN_C } #endif #undef FT_MODERR_START_LIST #undef FT_MODERR_END_LIST #undef FT_MODERRDEF #undef FT_NEED_EXTERN_C #endif /* FTMODERR_H_ */ /* END */
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