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diff --git a/src/freetype/afglobal.h b/src/freetype/afglobal.h
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+/***************************************************************************/
+/*                                                                         */
+/*  afglobal.h                                                             */
+/*                                                                         */
+/*    Auto-fitter routines to compute global hinting values                */
+/*    (specification).                                                     */
+/*                                                                         */
+/*  Copyright 2003-2018 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.                                        */
+/*                                                                         */
+/***************************************************************************/
+
+
+#ifndef AFGLOBAL_H_
+#define AFGLOBAL_H_
+
+
+#include "aftypes.h"
+#include "afmodule.h"
+#include "afshaper.h"
+
+
+FT_BEGIN_HEADER
+
+
+  FT_LOCAL_ARRAY( AF_WritingSystemClass )
+  af_writing_system_classes[];
+
+
+#undef  SCRIPT
+#define SCRIPT( s, S, d, h, H, ss )                            \
+          AF_DECLARE_SCRIPT_CLASS( af_ ## s ## _script_class )
+
+#include "afscript.h"
+
+  FT_LOCAL_ARRAY( AF_ScriptClass )
+  af_script_classes[];
+
+
+#undef  STYLE
+#define STYLE( s, S, d, ws, sc, ss, c )                      \
+          AF_DECLARE_STYLE_CLASS( af_ ## s ## _style_class )
+
+#include "afstyles.h"
+
+  FT_LOCAL_ARRAY( AF_StyleClass )
+  af_style_classes[];
+
+
+#ifdef FT_DEBUG_LEVEL_TRACE
+  FT_LOCAL_ARRAY( char* )
+  af_style_names[];
+#endif
+
+
+  /*
+   *  Default values and flags for both autofitter globals (found in
+   *  AF_ModuleRec) and face globals (in AF_FaceGlobalsRec).
+   */
+
+  /* index of fallback style in `af_style_classes' */
+#define AF_STYLE_FALLBACK    AF_STYLE_NONE_DFLT
+  /* default script for OpenType; ignored if HarfBuzz isn't used */
+#define AF_SCRIPT_DEFAULT    AF_SCRIPT_LATN
+
+  /* a bit mask for AF_DIGIT and AF_NONBASE */
+#define AF_STYLE_MASK        0x3FFF
+  /* an uncovered glyph      */
+#define AF_STYLE_UNASSIGNED  AF_STYLE_MASK
+
+  /* if this flag is set, we have an ASCII digit   */
+#define AF_DIGIT             0x8000U
+  /* if this flag is set, we have a non-base character */
+#define AF_NONBASE           0x4000U
+
+  /* `increase-x-height' property */
+#define AF_PROP_INCREASE_X_HEIGHT_MIN  6
+#define AF_PROP_INCREASE_X_HEIGHT_MAX  0
+
+
+  /************************************************************************/
+  /************************************************************************/
+  /*****                                                              *****/
+  /*****                  F A C E   G L O B A L S                     *****/
+  /*****                                                              *****/
+  /************************************************************************/
+  /************************************************************************/
+
+
+  /*
+   *  Note that glyph_styles[] maps each glyph to an index into the
+   *  `af_style_classes' array.
+   *
+   */
+  typedef struct  AF_FaceGlobalsRec_
+  {
+    FT_Face          face;
+    FT_Long          glyph_count;    /* same as face->num_glyphs */
+    FT_UShort*       glyph_styles;
+
+#ifdef FT_CONFIG_OPTION_USE_HARFBUZZ
+    hb_font_t*       hb_font;
+    hb_buffer_t*     hb_buf;           /* for feature comparison */
+#endif
+
+    /* per-face auto-hinter properties */
+    FT_UInt          increase_x_height;
+
+    AF_StyleMetrics  metrics[AF_STYLE_MAX];
+
+    /* Compute darkening amount once per size.  Use this to check whether */
+    /* darken_{x,y} needs to be recomputed.                               */
+    FT_UShort        stem_darkening_for_ppem;
+    /* Copy from e.g. AF_LatinMetrics.axis[AF_DIMENSION_HORZ] */
+    /* to compute the darkening amount.                       */
+    FT_Pos           standard_vertical_width;
+    /* Copy from e.g. AF_LatinMetrics.axis[AF_DIMENSION_VERT] */
+    /* to compute the darkening amount.                       */
+    FT_Pos           standard_horizontal_width;
+    /* The actual amount to darken a glyph along the X axis. */
+    FT_Pos           darken_x;
+    /* The actual amount to darken a glyph along the Y axis. */
+    FT_Pos           darken_y;
+    /* Amount to scale down by to keep emboldened points */
+    /* on the Y-axis in pre-computed blue zones.         */
+    FT_Fixed         scale_down_factor;
+    AF_Module        module;         /* to access global properties */
+
+  } AF_FaceGlobalsRec;
+
+
+  /*
+   *  model the global hints data for a given face, decomposed into
+   *  style-specific items
+   */
+
+  FT_LOCAL( FT_Error )
+  af_face_globals_new( FT_Face          face,
+                       AF_FaceGlobals  *aglobals,
+                       AF_Module        module );
+
+  FT_LOCAL( FT_Error )
+  af_face_globals_get_metrics( AF_FaceGlobals    globals,
+                               FT_UInt           gindex,
+                               FT_UInt           options,
+                               AF_StyleMetrics  *ametrics );
+
+  FT_LOCAL( void )
+  af_face_globals_free( AF_FaceGlobals  globals );
+
+  FT_LOCAL_DEF( FT_Bool )
+  af_face_globals_is_digit( AF_FaceGlobals  globals,
+                            FT_UInt         gindex );
+
+  /* */
+
+
+FT_END_HEADER
+
+#endif /* AFGLOBAL_H_ */
+
+
+/* END */