Addded logic to print trace messages to a file

[priyesh]ChangeLog

@@ -1,3 +1,19 @@
+2020-06-30  Priyesh Kumar   <priyeshkkumar@gmail.com>
+
+    * include/freetype/internal/ftdebug.h: Added a FreeType specific dlg 
+      output handler to print trace logs to file ~ 
+      `ft_freetype_output_handler()`
+
+    * src/base/ftdebug.c: 
+      1. If FT_LOGGING is enabled `ft_debug_init()` will be called from
+         `ft_logging_init()`
+      2. Added function definition of `ft_freetype_output_handler)()`
+
+    * src/base/ftobjs.c: If FT_LOGGING macro is disabled, only then FreeType
+      will call `ft_debug_init()` else it is controlled by logging APIs.
+      
+    * Fixed Scaling  
+    
 2020-06-29  Priyesh Kumar   <priyeshkkumar@gmail.com>
 
     * Added submodule - dlg library (https://github.com/nyorain/dlg)
@@ -13,8 +29,9 @@
     * include/freetype/internal/ftdebug.h: Created an environment for dlg 
       support in FreeType.
 
-    * include/freetype/internal/ftdebug.h: Added functions `ft_logging_init()` and `ft_logging_deinit()` for 
+    * include/freetype/internal/ftdebug.h: Added functions 
-         initializing and un-initalizing FILE*.
+        `ft_logging_init()` and `ft_logging_deinit()` for initializing and
+         un-initalizing FILE*.
 
     * src/base/ftdebug.c: 
        1. Added a FILE* to write logs to file
@@ -22,5 +39,7 @@
       `ft_logging_init()` and `ft_logging_deinit()`.
 
     * src/base/ftinit.c: 
-      1. Added a function call to `ft_logging_init()` in `FT_Init_FreeType()` if FT_LOGGING macro is enabled.
+      1. Added a function call to `ft_logging_init()` in `FT_Init_FreeType()` 
-      2. Added a function call to `ft_logging_deinit()` in `FT_Done_FreeType()` if FT_LOGGING macro is enabled.  
+         if FT_LOGGING macro is enabled.
+      2. Added function call to `ft_logging_deinit()` in `FT_Done_FreeType()` 
+         if FT_LOGGING macro is enabled.

include/freetype/internal/ftdebug.h

@@ -29,9 +29,9 @@
 #include FT_CONFIG_CONFIG_H
 #include <freetype/freetype.h>
 
-  /* Additional include files for supporting logging in FreeType using      */
+  /* Additional include files for supporting logging in FreeType using    */
-  /* external logging library ~ src/dlg                                     */
+  /* external logging library ~ src/dlg                                   */
-  /*                                                                        */
+  /*                                                                      */
 #include <../src/dlg/include/dlg/dlg.h>
 #include <../src/dlg/include/dlg/output.h>
 
@@ -95,8 +95,8 @@ FT_BEGIN_HEADER
    * Each component must define the macro FT_COMPONENT to a valid FT_Trace
    * value before using any TRACE macro.
    * 
-   * If FT_LOGGING is enabled, trace messages will be sent to 
+   * If FT_LOGGING is enabled, trace messages will be sent to dlg's API and 
-   * dlg's APIs and is FT_LOGGING is disabled trace messages will be sent to
+   * if is FT_LOGGING is disabled trace messages will be sent to
    * FT_Message(defined in ftdebug.c)
    * Therefore the following macros:
    *  
@@ -107,6 +107,19 @@ FT_BEGIN_HEADER
 #undef FT_Log
 #define FT_Log dlg_trace
 
+/****************************************************************************
+ * 
+ * dlg uses output handlers to control how and where the log messages are 
+ * printed.
+ * Therefore we need to define an output handler specific to FreeType, it 
+ * will act as a default output handler of Freetype. 
+ * 
+ */
+
+ FT_BASE( void ) 
+ ft_freetype_output_handler( const struct dlg_origin* origin, 
+ const char* string, void* data );
+
 #else
 
 #undef FT_Log
@@ -309,7 +322,7 @@ FT_BEGIN_HEADER
 
 #ifdef FT_LOGGING
 
-  /************************************************************************
+  /**************************************************************************
    * 
    * If FT_LOGGING macro is enabled, Freetype needs to initialize and 
    * un-initialize FILE* using following functions

src/base/ftdebug.c

@@ -317,7 +317,7 @@
 #ifdef FT_LOGGING
 
 
-  /******************************************************************
+  /**************************************************************************
    * If FT_LOGGING is enabled FreeType needs a FILE* to write logs 
    * to file.
    */
@@ -325,7 +325,7 @@
 
 
 
-  /*******************************************************************
+  /**************************************************************************
    * 
    * If FT_LOGGING is enabled, FreeType needs a FILE* to write logs 
    * therefore it uses `ft_logging_init()` function to initialize a 
@@ -336,7 +336,11 @@
   FT_BASE_DEF( void )
   ft_logging_init( void )
   {
-    fileptr = fopen( "freetype2.logs", "w" );
+    fileptr = fopen( "freetype2.log", "w" );
+    ft_debug_init();
+    
+    /* We need to set the default FreeType specific dlg's output handler */
+    dlg_set_handler( &ft_freetype_output_handler, NULL );
   }
 
   FT_BASE_DEF( void )
@@ -345,6 +349,22 @@
     fclose( fileptr );
   }
 
+  FT_BASE_DEF( void )
+
+  /*************************************************************************
+   * 
+   * TODO:
+   * 1. Add support for priniting FT_COMPONENT
+   *    
+   */ 
+  ft_freetype_output_handler( const struct dlg_origin* origin, 
+                              const char* string, void* data )
+ {
+     unsigned int features = dlg_output_threadsafe /*| dlg_output_tags*/ ;
+	   dlg_generic_output_stream( fileptr, features, origin, string, 
+                                dlg_default_output_styles );
+ }
+
 #endif /* FT_LOGGING */
 
 /* END */

src/base/ftobjs.c

@@ -5273,10 +5273,12 @@
     if ( !memory || !alibrary )
       return FT_THROW( Invalid_Argument );
 
+#ifndef FT_LOGGING 
 #ifdef FT_DEBUG_LEVEL_ERROR
     /* init debugging support */
     ft_debug_init();
-#endif
+#endif /* FT_DEBUG_LEVEL_ERROR */
+#endif /* FT_LOGGING */ 
 
     /* first of all, allocate the library object */
     if ( FT_NEW( library ) )