diff options
Diffstat (limited to 'builds/windows/ftdebug.c')
| -rw-r--r-- | builds/windows/ftdebug.c | 243 |
1 files changed, 241 insertions, 2 deletions
diff --git a/builds/windows/ftdebug.c b/builds/windows/ftdebug.c index d58949003..eba7ca9e7 100644 --- a/builds/windows/ftdebug.c +++ b/builds/windows/ftdebug.c @@ -44,6 +44,62 @@ #include <freetype/freetype.h> #include <freetype/internal/ftdebug.h> +#ifdef FT_LOGGING + + /************************************************************************** + * + * Variable used when FT_LOGGING is enabled to control logging: + * + * 1. ft_default_trace_level: stores the value of trace levels which are + * provided to FreeType using FT2_DEBUG environment variable. + * + * 2. ft_custom_trace_level: stores the value of custom trace level which + * is provided by user at run-time. + * + * 3. ft_component: a string that holds the name of FT_COMPONENT + * + * 4. ft_fileptr: store the FILE* + * + * 5. ft_component_flag: a flag when is true, prints FT_COMPONENT along + * with log message if `-v` is defined in FT2_DEBUG + * 6. ft_timestamp_flag: a flag when is true, prints time in millisec along + * with log message if `-t` is define in FT2_DEBUG + * 7. ft_have_newline_char: It is used to differentiate between a log + * message with '\n' char and log message without '\n' char + * + * Static Variables are defined here to remove [ -Wunused-variable ] + * warning + * + */ + static const char* ft_default_trace_level = NULL; + static const char* ft_custom_trace_level = NULL; + static const char* ft_component = NULL; + static FILE* ft_fileptr = NULL; + static bool ft_component_flag = false; + static bool ft_timestamp_flag = false; + static bool ft_have_newline_char = true; + + ft_custom_log_handler custom_output_handler = NULL; + dlg_handler ft_default_log_handler = NULL; + + /* different types of dlg features to be used according to the flags */ + /* passed in FT2_DEBUG environment variable */ + + static unsigned int features_component = dlg_output_threadsafe + | dlg_output_tags; + static unsigned int features_timestamp = dlg_output_threadsafe + | dlg_output_time + | dlg_output_time_msecs; + static unsigned int features_both = dlg_output_threadsafe + | dlg_output_time_msecs + |dlg_output_time + | dlg_output_tags ; + static unsigned int features_none = dlg_output_threadsafe; + + + +#endif + #ifdef FT_DEBUG_LEVEL_ERROR @@ -207,7 +263,18 @@ FT_BASE_DEF( void ) ft_debug_init( void ) { - const char* ft2_debug = getenv( "FT2_DEBUG" ); + const char* ft2_debug = NULL; + +#ifdef FT_LOGGING + +if( ft_custom_trace_level != NULL ) + ft2_debug = ft_custom_trace_level; +else + ft2_debug = ft_default_trace_level; + +#else + ft2_debug = ft_getenv( "FT2_DEBUG" ); +#endif /* FT_LOGGIGN */ if ( ft2_debug ) @@ -218,10 +285,40 @@ for ( ; *p; p++ ) { + /* skip leading whitespace and separators */ if ( *p == ' ' || *p == '\t' || *p == ',' || *p == ';' || *p == '=' ) continue; +#ifdef FT_LOGGING + /* check extra arguments for logging */ + if( *p == '-' ) + { + const char* r = ++p; + if( *r == 'v' ) + { + ft_component_flag = true; + const char* s = ++r; + if( *s == 't' ) + { + ft_timestamp_flag = true; + p++; + } + p++; + } + else if( *r == 't' ) + { + ft_timestamp_flag = true; + const char* s = ++r; + if( *s == 'v' ) + { + ft_component_flag = true; + p++; + } + p++; + } + } +#endif /* read toggle name, followed by ':' */ q = p; while ( *p && *p != ':' ) @@ -281,7 +378,6 @@ ft_trace_levels = ft_trace_levels_enabled; } - #else /* !FT_DEBUG_LEVEL_TRACE */ @@ -327,4 +423,147 @@ #endif /* !FT_DEBUG_LEVEL_TRACE */ +#ifdef FT_LOGGING + + /************************************************************************** + * + * If FT_LOGGING is enabled, FreeType needs to initialize all logging + * variables to write logs. + * Therefore it uses `ft_logging_init()` function to initialize a + * loggging variables and `ft_logging_deinit()` to un-initialize the + * logging variables. + * + */ + + FT_BASE_DEF( void ) + ft_logging_init( void ) + { + ft_default_log_handler = ft_log_handler; + ft_default_trace_level = ft_getenv( "FT2_DEBUG" ); + ft_fileptr = fopen( "freetype2.log", "w" ); + + ft_debug_init(); + /* We need to set the default FreeType specific dlg's output handler */ + dlg_set_handler( ft_default_log_handler, NULL ); + + } + + FT_BASE_DEF( void ) + ft_logging_deinit( void ) + { + fclose( ft_fileptr ); + } + + /************************************************************************* + * + * TODO: + * 1. Add support for priniting FT_COMPONENT + * + */ + FT_BASE_DEF( void ) + ft_log_handler( const struct dlg_origin* origin, + const char* string, void* data ) + { + static unsigned int features ; + if( ft_timestamp_flag && ft_component_flag && ft_have_newline_char ) + features = features_both; + else if( ft_component_flag && ft_have_newline_char) + features = features_component; + else if( ft_timestamp_flag && ft_have_newline_char ) + features = features_timestamp; + else + features = features_none; + + + dlg_generic_output_stream( ft_fileptr, features, origin, string, + dlg_default_output_styles ); + + if( strchr( string, '\n' ) ) + ft_have_newline_char = true; + else + ft_have_newline_char = false; + } + + /************************************************************************** + * + * Functions to set trace levels at run-time + * 1. FT_Trace_Set_Level() - Use this function to change the trace level + * at run-time. e.g. FT_Trace_Set_Level( "any:6 io:2" ); + * + * 2. FT_Trace_Set_Default_Level() - Use this function to set the default + * value of trace levels which is provided by environment variable + * FT2_DEBUG + * + */ + + FT_EXPORT_DEF( void ) + FT_Trace_Set_Level( const char* level ) + { + ft_custom_trace_level = level; + ft_debug_init(); + } + + FT_EXPORT_DEF( void ) + FT_Trace_Set_Default_Level( void ) + { + ft_custom_trace_level = NULL ; + ft_debug_init(); + } + +/**************************************************************************** + * + * Functions to handle custom log handler: + * + */ + + FT_EXPORT_DEF( void ) + FT_Set_Log_Handler( ft_custom_log_handler handler ) + { + custom_output_handler = handler; + } + + FT_EXPORT_DEF( void ) + FT_Set_Default_Log_Handler() + { + custom_output_handler = NULL; + } + + FT_BASE_DEF( void ) + FT_Callback( const char* fmt, ... ) + { + va_list ap; + va_start( ap, fmt ); + custom_output_handler( ft_component , fmt, ap ); + va_end( ap ); + } + + FT_BASE_DEF( void ) + ft_add_tag( const char* tag ) + { + ft_component = tag; + dlg_add_tag( tag, NULL ); + } + + FT_BASE_DEF( void ) + ft_remove_tag( const char* tag ) + { + dlg_remove_tag( tag, NULL ); + } + +#else /* ! FT_LOGGING */ + + FT_BASE_DEF( void ) + ft_add_tag( const char* tag ) + { + /* nothing */ + } + + FT_BASE_DEF( void ) + ft_remove_tag( const char* tag ) + { + /* nothing */ + } + +#endif /* FT_LOGGING*/ + /* END */ |