Update freetype sources (2.6.2) in third party.

third_party/freetype2/src/include/freetype/internal/ftdebug.h

Index: third_party/freetype2/src/include/freetype/internal/ftdebug.h
diff --git a/third_party/freetype2/src/include/freetype/internal/ftdebug.h b/third_party/freetype2/src/include/freetype/internal/ftdebug.h
new file mode 100644
index 0000000000000000000000000000000000000000..216c73031ebf0896174cc46a6049f06acfd73e66
--- /dev/null
+++ b/third_party/freetype2/src/include/freetype/internal/ftdebug.h
@@ -0,0 +1,255 @@
+/***************************************************************************/
+/*                                                                         */
+/*  ftdebug.h                                                              */
+/*                                                                         */
+/*    Debugging and logging component (specification).                     */
+/*                                                                         */
+/*  Copyright 1996-2015 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.                                        */
+/*                                                                         */
+/*                                                                         */
+/*  IMPORTANT: A description of FreeType's debugging support can be        */
+/*             found in `docs/DEBUG.TXT'.  Read it if you need to use or   */
+/*             understand this code.                                       */
+/*                                                                         */
+/***************************************************************************/
+
+
+#ifndef __FTDEBUG_H__
+#define __FTDEBUG_H__
+
+
+#include <ft2build.h>
+#include FT_CONFIG_CONFIG_H
+#include FT_FREETYPE_H
+
+
+FT_BEGIN_HEADER
+
+
+  /* force the definition of FT_DEBUG_LEVEL_ERROR if FT_DEBUG_LEVEL_TRACE */
+  /* is already defined; this simplifies the following #ifdefs            */
+  /*                                                                      */
+#ifdef FT_DEBUG_LEVEL_TRACE
+#undef  FT_DEBUG_LEVEL_ERROR
+#define FT_DEBUG_LEVEL_ERROR
+#endif
+
+
+  /*************************************************************************/
+  /*                                                                       */
+  /* Define the trace enums as well as the trace levels array when they    */
+  /* are needed.                                                           */
+  /*                                                                       */
+  /*************************************************************************/
+
+#ifdef FT_DEBUG_LEVEL_TRACE
+
+#define FT_TRACE_DEF( x )  trace_ ## x ,
+
+  /* defining the enumeration */
+  typedef enum  FT_Trace_
+  {
+#include FT_INTERNAL_TRACE_H
+    trace_count
+
+  } FT_Trace;
+
+
+  /* defining the array of trace levels, provided by `src/base/ftdebug.c' */
+  extern int  ft_trace_levels[trace_count];
+
+#undef FT_TRACE_DEF
+
+#endif /* FT_DEBUG_LEVEL_TRACE */
+
+
+  /*************************************************************************/
+  /*                                                                       */
+  /* Define the FT_TRACE macro                                             */
+  /*                                                                       */
+  /* IMPORTANT!                                                            */
+  /*                                                                       */
+  /* Each component must define the macro FT_COMPONENT to a valid FT_Trace */
+  /* value before using any TRACE macro.                                   */
+  /*                                                                       */
+  /*************************************************************************/
+
+#ifdef FT_DEBUG_LEVEL_TRACE
+
+#define FT_TRACE( level, varformat )                      \
+          do                                              \
+          {                                               \
+            if ( ft_trace_levels[FT_COMPONENT] >= level ) \
+              FT_Message varformat;                       \
+          } while ( 0 )
+
+#else /* !FT_DEBUG_LEVEL_TRACE */
+
+#define FT_TRACE( level, varformat )  do { } while ( 0 )      /* nothing */
+
+#endif /* !FT_DEBUG_LEVEL_TRACE */
+
+
+  /*************************************************************************/
+  /*                                                                       */
+  /* <Function>                                                            */
+  /*    FT_Trace_Get_Count                                                 */
+  /*                                                                       */
+  /* <Description>                                                         */
+  /*    Return the number of available trace components.                   */
+  /*                                                                       */
+  /* <Return>                                                              */
+  /*    The number of trace components.  0 if FreeType 2 is not built with */
+  /*    FT_DEBUG_LEVEL_TRACE definition.                                   */
+  /*                                                                       */
+  /* <Note>                                                                */
+  /*    This function may be useful if you want to access elements of      */
+  /*    the internal `ft_trace_levels' array by an index.                  */
+  /*                                                                       */
+  FT_BASE( FT_Int )
+  FT_Trace_Get_Count( void );
+
+
+  /*************************************************************************/
+  /*                                                                       */
+  /* <Function>                                                            */
+  /*    FT_Trace_Get_Name                                                  */
+  /*                                                                       */
+  /* <Description>                                                         */
+  /*    Return the name of a trace component.                              */
+  /*                                                                       */
+  /* <Input>                                                               */
+  /*    The index of the trace component.                                  */
+  /*                                                                       */
+  /* <Return>                                                              */
+  /*    The name of the trace component.  This is a statically allocated   */
+  /*    C string, so do not free it after use.  NULL if FreeType 2 is not  */
+  /*    built with FT_DEBUG_LEVEL_TRACE definition.                        */
+  /*                                                                       */
+  /* <Note>                                                                */
+  /*    Use @FT_Trace_Get_Count to get the number of available trace       */
+  /*    components.                                                        */
+  /*                                                                       */
+  /*    This function may be useful if you want to control FreeType 2's    */
+  /*    debug level in your application.                                   */
+  /*                                                                       */
+  FT_BASE( const char* )
+  FT_Trace_Get_Name( FT_Int  idx );
+
+
+  /*************************************************************************/
+  /*                                                                       */
+  /* You need two opening and closing parentheses!                         */
+  /*                                                                       */
+  /* Example: FT_TRACE0(( "Value is %i", foo ))                            */
+  /*                                                                       */
+  /* Output of the FT_TRACEX macros is sent to stderr.                     */
+  /*                                                                       */
+  /*************************************************************************/
+
+#define FT_TRACE0( varformat )  FT_TRACE( 0, varformat )
+#define FT_TRACE1( varformat )  FT_TRACE( 1, varformat )
+#define FT_TRACE2( varformat )  FT_TRACE( 2, varformat )
+#define FT_TRACE3( varformat )  FT_TRACE( 3, varformat )
+#define FT_TRACE4( varformat )  FT_TRACE( 4, varformat )
+#define FT_TRACE5( varformat )  FT_TRACE( 5, varformat )
+#define FT_TRACE6( varformat )  FT_TRACE( 6, varformat )
+#define FT_TRACE7( varformat )  FT_TRACE( 7, varformat )
+
+
+  /*************************************************************************/
+  /*                                                                       */
+  /* Define the FT_ERROR macro.                                            */
+  /*                                                                       */
+  /* Output of this macro is sent to stderr.                               */
+  /*                                                                       */
+  /*************************************************************************/
+
+#ifdef FT_DEBUG_LEVEL_ERROR
+
+#define FT_ERROR( varformat )  FT_Message  varformat
+
+#else  /* !FT_DEBUG_LEVEL_ERROR */
+
+#define FT_ERROR( varformat )  do { } while ( 0 )      /* nothing */
+
+#endif /* !FT_DEBUG_LEVEL_ERROR */
+
+
+  /*************************************************************************/
+  /*                                                                       */
+  /* Define the FT_ASSERT and FT_THROW macros.  The call to `FT_Throw'     */
+  /* makes it possible to easily set a breakpoint at this function.        */
+  /*                                                                       */
+  /*************************************************************************/
+
+#ifdef FT_DEBUG_LEVEL_ERROR
+
+#define FT_ASSERT( condition )                                      \
+          do                                                        \
+          {                                                         \
+            if ( !( condition ) )                                   \
+              FT_Panic( "assertion failed on line %d of file %s\n", \
+                        __LINE__, __FILE__ );                       \
+          } while ( 0 )
+
+#define FT_THROW( e )                                   \
+          ( FT_Throw( FT_ERR_CAT( FT_ERR_PREFIX, e ),   \
+                      __LINE__,                         \
+                      __FILE__ )                      | \
+            FT_ERR_CAT( FT_ERR_PREFIX, e )            )
+
+#else /* !FT_DEBUG_LEVEL_ERROR */
+
+#define FT_ASSERT( condition )  do { } while ( 0 )
+
+#define FT_THROW( e )  FT_ERR_CAT( FT_ERR_PREFIX, e )
+
+#endif /* !FT_DEBUG_LEVEL_ERROR */
+
+
+  /*************************************************************************/
+  /*                                                                       */
+  /* Define `FT_Message' and `FT_Panic' when needed.                       */
+  /*                                                                       */
+  /*************************************************************************/
+
+#ifdef FT_DEBUG_LEVEL_ERROR
+
+#include "stdio.h"  /* for vfprintf() */
+
+  /* print a message */
+  FT_BASE( void )
+  FT_Message( const char*  fmt,
+              ... );
+
+  /* print a message and exit */
+  FT_BASE( void )
+  FT_Panic( const char*  fmt,
+            ... );
+
+  /* report file name and line number of an error */
+  FT_BASE( int )
+  FT_Throw( FT_Error     error,
+            int          line,
+            const char*  file );
+
+#endif /* FT_DEBUG_LEVEL_ERROR */
+
+
+  FT_BASE( void )
+  ft_debug_init( void );
+
+FT_END_HEADER
+
+#endif /* __FTDEBUG_H__ */
+
+
+/* END */