auto import from //depot/cupcake/@135843

10 files changed, 5122 insertions, 0 deletions

diff --git a/src/pshinter/pshalgo.c b/src/pshinter/pshalgo.c
new file mode 100644
index 0000000..5d7e2f4
--- /dev/null
+++ b/src/pshinter/pshalgo.c
@@ -0,0 +1,2302 @@
+/***************************************************************************/
+/*                                                                         */
+/*  pshalgo.c                                                              */
+/*                                                                         */
+/*    PostScript hinting algorithm (body).                                 */
+/*                                                                         */
+/*  Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 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.                                        */
+/*                                                                         */
+/***************************************************************************/
+
+
+#include <ft2build.h>
+#include FT_INTERNAL_OBJECTS_H
+#include FT_INTERNAL_DEBUG_H
+#include FT_INTERNAL_CALC_H
+#include "pshalgo.h"
+
+#include "pshnterr.h"
+
+
+#undef  FT_COMPONENT
+#define FT_COMPONENT  trace_pshalgo2
+
+
+#ifdef DEBUG_HINTER
+  PSH_Hint_Table  ps_debug_hint_table = 0;
+  PSH_HintFunc    ps_debug_hint_func  = 0;
+  PSH_Glyph       ps_debug_glyph      = 0;
+#endif
+
+
+#define  COMPUTE_INFLEXS  /* compute inflection points to optimize `S' */
+                          /* and similar glyphs                        */
+#define  STRONGER         /* slightly increase the contrast of smooth  */
+                          /* hinting                                   */
+
+
+  /*************************************************************************/
+  /*************************************************************************/
+  /*****                                                               *****/
+  /*****                  BASIC HINTS RECORDINGS                       *****/
+  /*****                                                               *****/
+  /*************************************************************************/
+  /*************************************************************************/
+
+  /* return true if two stem hints overlap */
+  static FT_Int
+  psh_hint_overlap( PSH_Hint  hint1,
+                    PSH_Hint  hint2 )
+  {
+    return hint1->org_pos + hint1->org_len >= hint2->org_pos &&
+           hint2->org_pos + hint2->org_len >= hint1->org_pos;
+  }
+
+
+  /* destroy hints table */
+  static void
+  psh_hint_table_done( PSH_Hint_Table  table,
+                       FT_Memory       memory )
+  {
+    FT_FREE( table->zones );
+    table->num_zones = 0;
+    table->zone      = 0;
+
+    FT_FREE( table->sort );
+    FT_FREE( table->hints );
+    table->num_hints   = 0;
+    table->max_hints   = 0;
+    table->sort_global = 0;
+  }
+
+
+  /* deactivate all hints in a table */
+  static void
+  psh_hint_table_deactivate( PSH_Hint_Table  table )
+  {
+    FT_UInt   count = table->max_hints;
+    PSH_Hint  hint  = table->hints;
+
+
+    for ( ; count > 0; count--, hint++ )
+    {
+      psh_hint_deactivate( hint );
+      hint->order = -1;
+    }
+  }
+
+
+  /* internal function to record a new hint */
+  static void
+  psh_hint_table_record( PSH_Hint_Table  table,
+                         FT_UInt         idx )
+  {
+    PSH_Hint  hint = table->hints + idx;
+
+
+    if ( idx >= table->max_hints )
+    {
+      FT_ERROR(( "psh_hint_table_record: invalid hint index %d\n", idx ));
+      return;
+    }
+
+    /* ignore active hints */
+    if ( psh_hint_is_active( hint ) )
+      return;
+
+    psh_hint_activate( hint );
+
+    /* now scan the current active hint set to check */
+    /* whether `hint' overlaps with another hint     */
+    {
+      PSH_Hint*  sorted = table->sort_global;
+      FT_UInt    count  = table->num_hints;
+      PSH_Hint   hint2;
+
+
+      hint->parent = 0;
+      for ( ; count > 0; count--, sorted++ )
+      {
+        hint2 = sorted[0];
+
+        if ( psh_hint_overlap( hint, hint2 ) )
+        {
+          hint->parent = hint2;
+          break;
+        }
+      }
+    }
+
+    if ( table->num_hints < table->max_hints )
+      table->sort_global[table->num_hints++] = hint;
+    else
+      FT_ERROR(( "psh_hint_table_record: too many sorted hints!  BUG!\n" ));
+  }
+
+
+  static void
+  psh_hint_table_record_mask( PSH_Hint_Table  table,
+                              PS_Mask         hint_mask )
+  {
+    FT_Int    mask = 0, val = 0;
+    FT_Byte*  cursor = hint_mask->bytes;
+    FT_UInt   idx, limit;
+
+
+    limit = hint_mask->num_bits;
+
+    for ( idx = 0; idx < limit; idx++ )
+    {
+      if ( mask == 0 )
+      {
+        val  = *cursor++;
+        mask = 0x80;
+      }
+
+      if ( val & mask )
+        psh_hint_table_record( table, idx );
+
+      mask >>= 1;
+    }
+  }
+
+
+  /* create hints table */
+  static FT_Error
+  psh_hint_table_init( PSH_Hint_Table  table,
+                       PS_Hint_Table   hints,
+                       PS_Mask_Table   hint_masks,
+                       PS_Mask_Table   counter_masks,
+                       FT_Memory       memory )
+  {
+    FT_UInt   count;
+    FT_Error  error;
+
+    FT_UNUSED( counter_masks );
+
+
+    count = hints->num_hints;
+
+    /* allocate our tables */
+    if ( FT_NEW_ARRAY( table->sort,  2 * count     ) ||
+         FT_NEW_ARRAY( table->hints,     count     ) ||
+         FT_NEW_ARRAY( table->zones, 2 * count + 1 ) )
+      goto Exit;
+
+    table->max_hints   = count;
+    table->sort_global = table->sort + count;
+    table->num_hints   = 0;
+    table->num_zones   = 0;
+    table->zone        = 0;
+
+    /* initialize the `table->hints' array */
+    {
+      PSH_Hint  write = table->hints;
+      PS_Hint   read  = hints->hints;
+
+
+      for ( ; count > 0; count--, write++, read++ )
+      {
+        write->org_pos = read->pos;
+        write->org_len = read->len;
+        write->flags   = read->flags;
+      }
+    }
+
+    /* we now need to determine the initial `parent' stems; first  */
+    /* activate the hints that are given by the initial hint masks */
+    if ( hint_masks )
+    {
+      PS_Mask  mask = hint_masks->masks;
+
+
+      count             = hint_masks->num_masks;
+      table->hint_masks = hint_masks;
+
+      for ( ; count > 0; count--, mask++ )
+        psh_hint_table_record_mask( table, mask );
+    }
+
+    /* finally, do a linear parse in case some hints were left alone */
+    if ( table->num_hints != table->max_hints )
+    {
+      FT_UInt  idx;
+
+
+      FT_ERROR(( "psh_hint_table_init: missing/incorrect hint masks!\n" ));
+
+      count = table->max_hints;
+      for ( idx = 0; idx < count; idx++ )
+        psh_hint_table_record( table, idx );
+    }
+
+  Exit:
+    return error;
+  }
+
+
+  static void
+  psh_hint_table_activate_mask( PSH_Hint_Table  table,
+                                PS_Mask         hint_mask )
+  {
+    FT_Int    mask = 0, val = 0;
+    FT_Byte*  cursor = hint_mask->bytes;
+    FT_UInt   idx, limit, count;
+
+
+    limit = hint_mask->num_bits;
+    count = 0;
+
+    psh_hint_table_deactivate( table );
+
+    for ( idx = 0; idx < limit; idx++ )
+    {
+      if ( mask == 0 )
+      {
+        val  = *cursor++;
+        mask = 0x80;
+      }
+
+      if ( val & mask )
+      {
+        PSH_Hint  hint = &table->hints[idx];
+
+
+        if ( !psh_hint_is_active( hint ) )
+        {
+          FT_UInt     count2;
+
+#if 0
+          PSH_Hint*  sort = table->sort;
+          PSH_Hint   hint2;
+
+
+          for ( count2 = count; count2 > 0; count2--, sort++ )
+          {
+            hint2 = sort[0];
+            if ( psh_hint_overlap( hint, hint2 ) )
+              FT_ERROR(( "psh_hint_table_activate_mask:"
+                         " found overlapping hints\n" ))
+          }
+#else
+          count2 = 0;
+#endif
+
+          if ( count2 == 0 )
+          {
+            psh_hint_activate( hint );
+            if ( count < table->max_hints )
+              table->sort[count++] = hint;
+            else
+              FT_ERROR(( "psh_hint_tableactivate_mask:"
+                         " too many active hints\n" ));
+          }
+        }
+      }
+
+      mask >>= 1;
+    }
+    table->num_hints = count;
+
+    /* now, sort the hints; they are guaranteed to not overlap */
+    /* so we can compare their "org_pos" field directly        */
+    {
+      FT_Int     i1, i2;
+      PSH_Hint   hint1, hint2;
+      PSH_Hint*  sort = table->sort;
+
+
+      /* a simple bubble sort will do, since in 99% of cases, the hints */
+      /* will be already sorted -- and the sort will be linear          */
+      for ( i1 = 1; i1 < (FT_Int)count; i1++ )
+      {
+        hint1 = sort[i1];
+        for ( i2 = i1 - 1; i2 >= 0; i2-- )
+        {
+          hint2 = sort[i2];
+
+          if ( hint2->org_pos < hint1->org_pos )
+            break;
+
+          sort[i2 + 1] = hint2;
+          sort[i2]     = hint1;
+        }
+      }
+    }
+  }
+
+
+  /*************************************************************************/
+  /*************************************************************************/
+  /*****                                                               *****/
+  /*****               HINTS GRID-FITTING AND OPTIMIZATION             *****/
+  /*****                                                               *****/
+  /*************************************************************************/
+  /*************************************************************************/
+
+#if 1
+  static FT_Pos
+  psh_dimension_quantize_len( PSH_Dimension  dim,
+                              FT_Pos         len,
+                              FT_Bool        do_snapping )
+  {
+    if ( len <= 64 )
+      len = 64;
+    else
+    {
+      FT_Pos  delta = len - dim->stdw.widths[0].cur;
+
+
+      if ( delta < 0 )
+        delta = -delta;
+
+      if ( delta < 40 )
+      {
+        len = dim->stdw.widths[0].cur;
+        if ( len < 48 )
+          len = 48;
+      }
+
+      if ( len < 3 * 64 )
+      {
+        delta = ( len & 63 );
+        len  &= -64;
+
+        if ( delta < 10 )
+          len += delta;
+
+        else if ( delta < 32 )
+          len += 10;
+
+        else if ( delta < 54 )
+          len += 54;
+
+        else
+          len += delta;
+      }
+      else
+        len = FT_PIX_ROUND( len );
+    }
+
+    if ( do_snapping )
+      len = FT_PIX_ROUND( len );
+
+    return  len;
+  }
+#endif /* 0 */
+
+
+#ifdef DEBUG_HINTER
+
+  static void
+  ps_simple_scale( PSH_Hint_Table  table,
+                   FT_Fixed        scale,
+                   FT_Fixed        delta,
+                   FT_Int          dimension )
+  {
+    PSH_Hint  hint;
+    FT_UInt   count;
+
+
+    for ( count = 0; count < table->max_hints; count++ )
+    {
+      hint = table->hints + count;
+
+      hint->cur_pos = FT_MulFix( hint->org_pos, scale ) + delta;
+      hint->cur_len = FT_MulFix( hint->org_len, scale );
+
+      if ( ps_debug_hint_func )
+        ps_debug_hint_func( hint, dimension );
+    }
+  }
+
+#endif /* DEBUG_HINTER */
+
+
+  static FT_Fixed
+  psh_hint_snap_stem_side_delta( FT_Fixed  pos,
+                                 FT_Fixed  len )
+  {
+    FT_Fixed  delta1 = FT_PIX_ROUND( pos ) - pos;
+    FT_Fixed  delta2 = FT_PIX_ROUND( pos + len ) - pos - len;
+
+
+    if ( FT_ABS( delta1 ) <= FT_ABS( delta2 ) )
+      return delta1;
+    else
+      return delta2;
+  }
+
+
+  static void
+  psh_hint_align( PSH_Hint     hint,
+                  PSH_Globals  globals,
+                  FT_Int       dimension,
+                  PSH_Glyph    glyph )
+  {
+    PSH_Dimension  dim   = &globals->dimension[dimension];
+    FT_Fixed       scale = dim->scale_mult;
+    FT_Fixed       delta = dim->scale_delta;
+
+
+    if ( !psh_hint_is_fitted( hint ) )
+    {
+      FT_Pos  pos = FT_MulFix( hint->org_pos, scale ) + delta;
+      FT_Pos  len = FT_MulFix( hint->org_len, scale );
+
+      FT_Int            do_snapping;
+      FT_Pos            fit_len;
+      PSH_AlignmentRec  align;
+
+
+      /* ignore stem alignments when requested through the hint flags */
+      if ( ( dimension == 0 && !glyph->do_horz_hints ) ||
+           ( dimension == 1 && !glyph->do_vert_hints ) )
+      {
+        hint->cur_pos = pos;
+        hint->cur_len = len;
+
+        psh_hint_set_fitted( hint );
+        return;
+      }
+
+      /* perform stem snapping when requested - this is necessary
+       * for monochrome and LCD hinting modes only
+       */
+      do_snapping = ( dimension == 0 && glyph->do_horz_snapping ) ||
+                    ( dimension == 1 && glyph->do_vert_snapping );
+
+      hint->cur_len = fit_len = len;
+
+      /* check blue zones for horizontal stems */
+      align.align     = PSH_BLUE_ALIGN_NONE;
+      align.align_bot = align.align_top = 0;
+
+      if ( dimension == 1 )
+        psh_blues_snap_stem( &globals->blues,
+                             hint->org_pos + hint->org_len,
+                             hint->org_pos,
+                             &align );
+
+      switch ( align.align )
+      {
+      case PSH_BLUE_ALIGN_TOP:
+        /* the top of the stem is aligned against a blue zone */
+        hint->cur_pos = align.align_top - fit_len;
+        break;
+
+      case PSH_BLUE_ALIGN_BOT:
+        /* the bottom of the stem is aligned against a blue zone */
+        hint->cur_pos = align.align_bot;
+        break;
+
+      case PSH_BLUE_ALIGN_TOP | PSH_BLUE_ALIGN_BOT:
+        /* both edges of the stem are aligned against blue zones */
+        hint->cur_pos = align.align_bot;
+        hint->cur_len = align.align_top - align.align_bot;
+        break;
+
+      default:
+        {
+          PSH_Hint  parent = hint->parent;
+
+
+          if ( parent )
+          {
+            FT_Pos  par_org_center, par_cur_center;
+            FT_Pos  cur_org_center, cur_delta;
+
+
+            /* ensure that parent is already fitted */
+            if ( !psh_hint_is_fitted( parent ) )
+              psh_hint_align( parent, globals, dimension, glyph );
+
+            /* keep original relation between hints, this is, use the */
+            /* scaled distance between the centers of the hints to    */
+            /* compute the new position                               */
+            par_org_center = parent->org_pos + ( parent->org_len >> 1 );
+            par_cur_center = parent->cur_pos + ( parent->cur_len >> 1 );
+            cur_org_center = hint->org_pos   + ( hint->org_len   >> 1 );
+
+            cur_delta = FT_MulFix( cur_org_center - par_org_center, scale );
+            pos       = par_cur_center + cur_delta - ( len >> 1 );
+          }
+
+          hint->cur_pos = pos;
+          hint->cur_len = fit_len;
+
+          /* Stem adjustment tries to snap stem widths to standard
+           * ones.  This is important to prevent unpleasant rounding
+           * artefacts.
+           */
+          if ( glyph->do_stem_adjust )
+          {
+            if ( len <= 64 )
+            {
+              /* the stem is less than one pixel; we will center it
+               * around the nearest pixel center
+               */
+              if ( len >= 32 )
+              {
+                /* This is a special case where we also widen the stem
+                 * and align it to the pixel grid.
+                 *
+                 *   stem_center          = pos + (len/2)
+                 *   nearest_pixel_center = FT_ROUND(stem_center-32)+32
+                 *   new_pos              = nearest_pixel_center-32
+                 *                        = FT_ROUND(stem_center-32)
+                 *                        = FT_FLOOR(stem_center-32+32)
+                 *                        = FT_FLOOR(stem_center)
+                 *   new_len              = 64
+                 */
+                pos = FT_PIX_FLOOR( pos + ( len >> 1 ) );
+                len = 64;
+              }
+              else if ( len > 0 )
+              {
+                /* This is a very small stem; we simply align it to the
+                 * pixel grid, trying to find the minimal displacement.
+                 *
+                 * left               = pos
+                 * right              = pos + len
+                 * left_nearest_edge  = ROUND(pos)
+                 * right_nearest_edge = ROUND(right)
+                 *
+                 * if ( ABS(left_nearest_edge - left) <=
+                 *      ABS(right_nearest_edge - right) )
+                 *    new_pos = left
+                 * else
+                 *    new_pos = right
+                 */
+                FT_Pos  left_nearest  = FT_PIX_ROUND( pos );
+                FT_Pos  right_nearest = FT_PIX_ROUND( pos + len );
+                FT_Pos  left_disp     = left_nearest - pos;
+                FT_Pos  right_disp    = right_nearest - ( pos + len );
+
+
+                if ( left_disp < 0 )
+                  left_disp = -left_disp;
+                if ( right_disp < 0 )
+                  right_disp = -right_disp;
+                if ( left_disp <= right_disp )
+                  pos = left_nearest;
+                else
+                  pos = right_nearest;
+              }
+              else
+              {
+                /* this is a ghost stem; we simply round it */
+                pos = FT_PIX_ROUND( pos );
+              }
+            }
+            else
+            {
+              len = psh_dimension_quantize_len( dim, len, 0 );
+            }
+          }
+
+          /* now that we have a good hinted stem width, try to position */
+          /* the stem along a pixel grid integer coordinate             */
+          hint->cur_pos = pos + psh_hint_snap_stem_side_delta( pos, len );
+          hint->cur_len = len;
+        }
+      }
+
+      if ( do_snapping )
+      {
+        pos = hint->cur_pos;
+        len = hint->cur_len;
+
+        if ( len < 64 )
+          len = 64;
+        else
+          len = FT_PIX_ROUND( len );
+
+        switch ( align.align )
+        {
+          case PSH_BLUE_ALIGN_TOP:
+            hint->cur_pos = align.align_top - len;
+            hint->cur_len = len;
+            break;
+
+          case PSH_BLUE_ALIGN_BOT:
+            hint->cur_len = len;
+            break;
+
+          case PSH_BLUE_ALIGN_BOT | PSH_BLUE_ALIGN_TOP:
+            /* don't touch */
+            break;
+
+
+          default:
+            hint->cur_len = len;
+            if ( len & 64 )
+              pos = FT_PIX_FLOOR( pos + ( len >> 1 ) ) + 32;
+            else
+              pos = FT_PIX_ROUND( pos + ( len >> 1 ) );
+
+            hint->cur_pos = pos - ( len >> 1 );
+            hint->cur_len = len;
+        }
+      }
+
+      psh_hint_set_fitted( hint );
+
+#ifdef DEBUG_HINTER
+      if ( ps_debug_hint_func )
+        ps_debug_hint_func( hint, dimension );
+#endif
+    }
+  }
+
+
+#if 0  /* not used for now, experimental */
+
+ /*
+  *  A variant to perform "light" hinting (i.e. FT_RENDER_MODE_LIGHT)
+  *  of stems
+  */
+  static void
+  psh_hint_align_light( PSH_Hint     hint,
+                        PSH_Globals  globals,
+                        FT_Int       dimension,
+                        PSH_Glyph    glyph )
+  {
+    PSH_Dimension  dim   = &globals->dimension[dimension];
+    FT_Fixed       scale = dim->scale_mult;
+    FT_Fixed       delta = dim->scale_delta;
+
+
+    if ( !psh_hint_is_fitted( hint ) )
+    {
+      FT_Pos  pos = FT_MulFix( hint->org_pos, scale ) + delta;
+      FT_Pos  len = FT_MulFix( hint->org_len, scale );
+
+      FT_Pos  fit_len;
+
+      PSH_AlignmentRec  align;
+
+
+      /* ignore stem alignments when requested through the hint flags */
+      if ( ( dimension == 0 && !glyph->do_horz_hints ) ||
+           ( dimension == 1 && !glyph->do_vert_hints ) )
+      {
+        hint->cur_pos = pos;
+        hint->cur_len = len;
+
+        psh_hint_set_fitted( hint );
+        return;
+      }
+
+      fit_len = len;
+
+      hint->cur_len = fit_len;
+
+      /* check blue zones for horizontal stems */
+      align.align = PSH_BLUE_ALIGN_NONE;
+      align.align_bot = align.align_top = 0;
+
+      if ( dimension == 1 )
+        psh_blues_snap_stem( &globals->blues,
+                             hint->org_pos + hint->org_len,
+                             hint->org_pos,
+                             &align );
+
+      switch ( align.align )
+      {
+      case PSH_BLUE_ALIGN_TOP:
+        /* the top of the stem is aligned against a blue zone */
+        hint->cur_pos = align.align_top - fit_len;
+        break;
+
+      case PSH_BLUE_ALIGN_BOT:
+        /* the bottom of the stem is aligned against a blue zone */
+        hint->cur_pos = align.align_bot;
+        break;
+
+      case PSH_BLUE_ALIGN_TOP | PSH_BLUE_ALIGN_BOT:
+        /* both edges of the stem are aligned against blue zones */
+        hint->cur_pos = align.align_bot;
+        hint->cur_len = align.align_top - align.align_bot;
+        break;
+
+      default:
+        {
+          PSH_Hint  parent = hint->parent;
+
+
+          if ( parent )
+          {
+            FT_Pos  par_org_center, par_cur_center;
+            FT_Pos  cur_org_center, cur_delta;
+
+
+            /* ensure that parent is already fitted */
+            if ( !psh_hint_is_fitted( parent ) )
+              psh_hint_align_light( parent, globals, dimension, glyph );
+
+            par_org_center = parent->org_pos + ( parent->org_len / 2 );
+            par_cur_center = parent->cur_pos + ( parent->cur_len / 2 );
+            cur_org_center = hint->org_pos   + ( hint->org_len   / 2 );
+
+            cur_delta = FT_MulFix( cur_org_center - par_org_center, scale );
+            pos       = par_cur_center + cur_delta - ( len >> 1 );
+          }
+
+          /* Stems less than one pixel wide are easy -- we want to
+           * make them as dark as possible, so they must fall within
+           * one pixel.  If the stem is split between two pixels
+           * then snap the edge that is nearer to the pixel boundary
+           * to the pixel boundary.
+           */
+          if ( len <= 64 )
+          {
+            if ( ( pos + len + 63 ) / 64  != pos / 64 + 1 )
+              pos += psh_hint_snap_stem_side_delta ( pos, len );
+          }
+
+          /* Position stems other to minimize the amount of mid-grays.
+           * There are, in general, two positions that do this,
+           * illustrated as A) and B) below.
+           *
+           *   +                   +                   +                   +
+           *
+           * A)             |--------------------------------|
+           * B)   |--------------------------------|
+           * C)       |--------------------------------|
+           *
+           * Position A) (split the excess stem equally) should be better
+           * for stems of width N + f where f < 0.5.
+           *
+           * Position B) (split the deficiency equally) should be better
+           * for stems of width N + f where f > 0.5.
+           *
+           * It turns out though that minimizing the total number of lit
+           * pixels is also important, so position C), with one edge
+           * aligned with a pixel boundary is actually preferable
+           * to A).  There are also more possibile positions for C) than
+           * for A) or B), so it involves less distortion of the overall
+           * character shape.
+           */
+          else /* len > 64 */
+          {
+            FT_Fixed  frac_len = len & 63;
+            FT_Fixed  center = pos + ( len >> 1 );
+            FT_Fixed  delta_a, delta_b;
+
+
+            if ( ( len / 64 ) & 1 )
+            {
+              delta_a = FT_PIX_FLOOR( center ) + 32 - center;
+              delta_b = FT_PIX_ROUND( center ) - center;
+            }
+            else
+            {
+              delta_a = FT_PIX_ROUND( center ) - center;
+              delta_b = FT_PIX_FLOOR( center ) + 32 - center;
+            }
+
+            /* We choose between B) and C) above based on the amount
+             * of fractinal stem width; for small amounts, choose
+             * C) always, for large amounts, B) always, and inbetween,
+             * pick whichever one involves less stem movement.
+             */
+            if ( frac_len < 32 )
+            {
+              pos += psh_hint_snap_stem_side_delta ( pos, len );
+            }
+            else if ( frac_len < 48 )
+            {
+              FT_Fixed  side_delta = psh_hint_snap_stem_side_delta ( pos,
+                                                                     len );
+
+              if ( FT_ABS( side_delta ) < FT_ABS( delta_b ) )
+                pos += side_delta;
+              else
+                pos += delta_b;
+            }
+            else
+            {
+              pos += delta_b;
+            }
+          }
+
+          hint->cur_pos = pos;
+        }
+      }  /* switch */
+
+      psh_hint_set_fitted( hint );
+
+#ifdef DEBUG_HINTER
+      if ( ps_debug_hint_func )
+        ps_debug_hint_func( hint, dimension );
+#endif
+    }
+  }
+
+#endif /* 0 */
+
+
+  static void
+  psh_hint_table_align_hints( PSH_Hint_Table  table,
+                              PSH_Globals     globals,
+                              FT_Int          dimension,
+                              PSH_Glyph       glyph )
+  {
+    PSH_Hint       hint;
+    FT_UInt        count;
+
+#ifdef DEBUG_HINTER
+
+    PSH_Dimension  dim   = &globals->dimension[dimension];
+    FT_Fixed       scale = dim->scale_mult;
+    FT_Fixed       delta = dim->scale_delta;
+
+
+    if ( ps_debug_no_vert_hints && dimension == 0 )
+    {
+      ps_simple_scale( table, scale, delta, dimension );
+      return;
+    }
+
+    if ( ps_debug_no_horz_hints && dimension == 1 )
+    {
+      ps_simple_scale( table, scale, delta, dimension );
+      return;
+    }
+
+#endif /* DEBUG_HINTER*/
+
+    hint  = table->hints;
+    count = table->max_hints;
+
+    for ( ; count > 0; count--, hint++ )
+      psh_hint_align( hint, globals, dimension, glyph );
+  }
+
+
+  /*************************************************************************/
+  /*************************************************************************/
+  /*****                                                               *****/
+  /*****                POINTS INTERPOLATION ROUTINES                  *****/
+  /*****                                                               *****/
+  /*************************************************************************/
+  /*************************************************************************/
+
+#define PSH_ZONE_MIN  -3200000L
+#define PSH_ZONE_MAX  +3200000L
+
+#define xxDEBUG_ZONES
+
+
+#ifdef DEBUG_ZONES
+
+#include <stdio.h>
+
+  static void
+  psh_print_zone( PSH_Zone  zone )
+  {
+    printf( "zone [scale,delta,min,max] = [%.3f,%.3f,%d,%d]\n",
+             zone->scale / 65536.0,
+             zone->delta / 64.0,
+             zone->min,
+             zone->max );
+  }
+
+#else
+
+#define psh_print_zone( x )  do { } while ( 0 )
+
+#endif /* DEBUG_ZONES */
+
+
+  /*************************************************************************/
+  /*************************************************************************/
+  /*****                                                               *****/
+  /*****                    HINTER GLYPH MANAGEMENT                    *****/
+  /*****                                                               *****/
+  /*************************************************************************/
+  /*************************************************************************/
+
+#if 1
+
+#define  psh_corner_is_flat      ft_corner_is_flat
+#define  psh_corner_orientation  ft_corner_orientation
+
+#else
+
+  FT_LOCAL_DEF( FT_Int )
+  psh_corner_is_flat( FT_Pos  x_in,
+                      FT_Pos  y_in,
+                      FT_Pos  x_out,
+                      FT_Pos  y_out )
+  {
+    FT_Pos  ax = x_in;
+    FT_Pos  ay = y_in;
+
+    FT_Pos  d_in, d_out, d_corner;
+
+
+    if ( ax < 0 )
+      ax = -ax;
+    if ( ay < 0 )
+      ay = -ay;
+    d_in = ax + ay;
+
+    ax = x_out;
+    if ( ax < 0 )
+      ax = -ax;
+    ay = y_out;
+    if ( ay < 0 )
+      ay = -ay;
+    d_out = ax + ay;
+
+    ax = x_out + x_in;
+    if ( ax < 0 )
+      ax = -ax;
+    ay = y_out + y_in;
+    if ( ay < 0 )
+      ay = -ay;
+    d_corner = ax + ay;
+
+    return ( d_in + d_out - d_corner ) < ( d_corner >> 4 );
+  }
+
+  static FT_Int
+  psh_corner_orientation( FT_Pos  in_x,
+                          FT_Pos  in_y,
+                          FT_Pos  out_x,
+                          FT_Pos  out_y )
+  {
+    FT_Int  result;
+
+
+    /* deal with the trivial cases quickly */
+    if ( in_y == 0 )
+    {
+      if ( in_x >= 0 )
+        result = out_y;
+      else
+        result = -out_y;
+    }
+    else if ( in_x == 0 )
+    {
+      if ( in_y >= 0 )
+        result = -out_x;
+      else
+        result = out_x;
+    }
+    else if ( out_y == 0 )
+    {
+      if ( out_x >= 0 )
+        result = in_y;
+      else
+        result = -in_y;
+    }
+    else if ( out_x == 0 )
+    {
+      if ( out_y >= 0 )
+        result = -in_x;
+      else
+        result =  in_x;
+    }
+    else /* general case */
+    {
+      long long  delta = (long long)in_x * out_y - (long long)in_y * out_x;
+
+      if ( delta == 0 )
+        result = 0;
+      else
+        result = 1 - 2 * ( delta < 0 );
+    }
+
+    return result;
+  }
+
+#endif /* !1 */
+
+
+#ifdef COMPUTE_INFLEXS
+
+  /* compute all inflex points in a given glyph */
+  static void
+  psh_glyph_compute_inflections( PSH_Glyph  glyph )
+  {
+    FT_UInt  n;
+
+
+    for ( n = 0; n < glyph->num_contours; n++ )
+    {
+      PSH_Point  first, start, end, before, after;
+      FT_Pos     in_x, in_y, out_x, out_y;
+      FT_Int     orient_prev, orient_cur;
+      FT_Int     finished = 0;
+
+
+      /* we need at least 4 points to create an inflection point */
+      if ( glyph->contours[n].count < 4 )
+        continue;
+
+      /* compute first segment in contour */
+      first = glyph->contours[n].start;
+
+      start = end = first;
+      do
+      {
+        end = end->next;
+        if ( end == first )
+          goto Skip;
+
+        in_x = end->org_u - start->org_u;
+        in_y = end->org_v - start->org_v;
+
+      } while ( in_x == 0 && in_y == 0 );
+
+      /* extend the segment start whenever possible */
+      before = start;
+      do
+      {
+        do
+        {
+          start  = before;
+          before = before->prev;
+          if ( before == first )
+            goto Skip;
+
+          out_x = start->org_u - before->org_u;
+          out_y = start->org_v - before->org_v;
+
+        } while ( out_x == 0 && out_y == 0 );
+
+        orient_prev = psh_corner_orientation( in_x, in_y, out_x, out_y );
+
+      } while ( orient_prev == 0 );
+
+      first = start;
+      in_x  = out_x;
+      in_y  = out_y;
+
+      /* now, process all segments in the contour */
+      do
+      {
+        /* first, extend current segment's end whenever possible */
+        after = end;
+        do
+        {
+          do
+          {
+            end   = after;
+            after = after->next;
+            if ( after == first )
+              finished = 1;
+
+            out_x = after->org_u - end->org_u;
+            out_y = after->org_v - end->org_v;
+
+          } while ( out_x == 0 && out_y == 0 );
+
+          orient_cur = psh_corner_orientation( in_x, in_y, out_x, out_y );
+
+        } while ( orient_cur == 0 );
+
+        if ( ( orient_cur ^ orient_prev ) < 0 )
+        {
+          do
+          {
+            psh_point_set_inflex( start );
+            start = start->next;
+          }
+          while ( start != end );
+
+          psh_point_set_inflex( start );
+        }
+
+        start       = end;
+        end         = after;
+        orient_prev = orient_cur;
+        in_x        = out_x;
+        in_y        = out_y;
+
+      } while ( !finished );
+
+    Skip:
+      ;
+    }
+  }
+
+#endif /* COMPUTE_INFLEXS */
+
+
+  static void
+  psh_glyph_done( PSH_Glyph  glyph )
+  {
+    FT_Memory  memory = glyph->memory;
+
+
+    psh_hint_table_done( &glyph->hint_tables[1], memory );
+    psh_hint_table_done( &glyph->hint_tables[0], memory );
+
+    FT_FREE( glyph->points );
+    FT_FREE( glyph->contours );
+
+    glyph->num_points   = 0;
+    glyph->num_contours = 0;
+
+    glyph->memory = 0;
+  }
+
+
+  static int
+  psh_compute_dir( FT_Pos  dx,
+                   FT_Pos  dy )
+  {
+    FT_Pos  ax, ay;
+    int     result = PSH_DIR_NONE;
+
+
+    ax = ( dx >= 0 ) ? dx : -dx;
+    ay = ( dy >= 0 ) ? dy : -dy;
+
+    if ( ay * 12 < ax )
+    {
+      /* |dy| <<< |dx|  means a near-horizontal segment */
+      result = ( dx >= 0 ) ? PSH_DIR_RIGHT : PSH_DIR_LEFT;
+    }
+    else if ( ax * 12 < ay )
+    {
+      /* |dx| <<< |dy|  means a near-vertical segment */
+      result = ( dy >= 0 ) ? PSH_DIR_UP : PSH_DIR_DOWN;
+    }
+
+    return result;
+  }
+
+
+  /* load outline point coordinates into hinter glyph */
+  static void
+  psh_glyph_load_points( PSH_Glyph  glyph,
+                         FT_Int     dimension )
+  {
+    FT_Vector*  vec   = glyph->outline->points;
+    PSH_Point   point = glyph->points;
+    FT_UInt     count = glyph->num_points;
+
+
+    for ( ; count > 0; count--, point++, vec++ )
+    {
+      point->flags2 = 0;
+      point->hint   = NULL;
+      if ( dimension == 0 )
+      {
+        point->org_u = vec->x;
+        point->org_v = vec->y;
+      }
+      else
+      {
+        point->org_u = vec->y;
+        point->org_v = vec->x;
+      }
+
+#ifdef DEBUG_HINTER
+      point->org_x = vec->x;
+      point->org_y = vec->y;
+#endif
+
+    }
+  }
+
+
+  /* save hinted point coordinates back to outline */
+  static void
+  psh_glyph_save_points( PSH_Glyph  glyph,
+                         FT_Int     dimension )
+  {
+    FT_UInt     n;
+    PSH_Point   point = glyph->points;
+    FT_Vector*  vec   = glyph->outline->points;
+    char*       tags  = glyph->outline->tags;
+
+
+    for ( n = 0; n < glyph->num_points; n++ )
+    {
+      if ( dimension == 0 )
+        vec[n].x = point->cur_u;
+      else
+        vec[n].y = point->cur_u;
+
+      if ( psh_point_is_strong( point ) )
+        tags[n] |= (char)( ( dimension == 0 ) ? 32 : 64 );
+
+#ifdef DEBUG_HINTER
+
+      if ( dimension == 0 )
+      {
+        point->cur_x   = point->cur_u;
+        point->flags_x = point->flags2 | point->flags;
+      }
+      else
+      {
+        point->cur_y   = point->cur_u;
+        point->flags_y = point->flags2 | point->flags;
+      }
+
+#endif
+
+      point++;
+    }
+  }
+
+
+  static FT_Error
+  psh_glyph_init( PSH_Glyph    glyph,
+                  FT_Outline*  outline,
+                  PS_Hints     ps_hints,
+                  PSH_Globals  globals )
+  {
+    FT_Error   error;
+    FT_Memory  memory;
+
+
+    /* clear all fields */
+    FT_MEM_ZERO( glyph, sizeof ( *glyph ) );
+
+    memory = glyph->memory = globals->memory;
+
+    /* allocate and setup points + contours arrays */
+    if ( FT_NEW_ARRAY( glyph->points,   outline->n_points   ) ||
+         FT_NEW_ARRAY( glyph->contours, outline->n_contours ) )
+      goto Exit;
+
+    glyph->num_points   = outline->n_points;
+    glyph->num_contours = outline->n_contours;
+
+    {
+      FT_UInt      first = 0, next, n;
+      PSH_Point    points  = glyph->points;
+      PSH_Contour  contour = glyph->contours;
+
+
+      for ( n = 0; n < glyph->num_contours; n++ )
+      {
+        FT_Int     count;
+        PSH_Point  point;
+
+
+        next  = outline->contours[n] + 1;
+        count = next - first;
+
+        contour->start = points + first;
+        contour->count = (FT_UInt)count;
+
+        if ( count > 0 )
+        {
+          point = points + first;
+
+          point->prev    = points + next - 1;
+          point->contour = contour;
+
+          for ( ; count > 1; count-- )
+          {
+            point[0].next = point + 1;
+            point[1].prev = point;
+            point++;
+            point->contour = contour;
+          }
+          point->next = points + first;
+        }
+
+        contour++;
+        first = next;
+      }
+    }
+
+    {
+      PSH_Point   points = glyph->points;
+      PSH_Point   point  = points;
+      FT_Vector*  vec    = outline->points;
+      FT_UInt     n;
+
+
+      for ( n = 0; n < glyph->num_points; n++, point++ )
+      {
+        FT_Int  n_prev = (FT_Int)( point->prev - points );
+        FT_Int  n_next = (FT_Int)( point->next - points );
+        FT_Pos  dxi, dyi, dxo, dyo;
+
+
+        if ( !( outline->tags[n] & FT_CURVE_TAG_ON ) )
+          point->flags = PSH_POINT_OFF;
+
+        dxi = vec[n].x - vec[n_prev].x;
+        dyi = vec[n].y - vec[n_prev].y;
+
+        point->dir_in = (FT_Char)psh_compute_dir( dxi, dyi );
+
+        dxo = vec[n_next].x - vec[n].x;
+        dyo = vec[n_next].y - vec[n].y;
+
+        point->dir_out = (FT_Char)psh_compute_dir( dxo, dyo );
+
+        /* detect smooth points */
+        if ( point->flags & PSH_POINT_OFF )
+          point->flags |= PSH_POINT_SMOOTH;
+
+        else if ( point->dir_in == point->dir_out )
+        {
+          if ( point->dir_out != PSH_DIR_NONE           ||
+               psh_corner_is_flat( dxi, dyi, dxo, dyo ) )
+            point->flags |= PSH_POINT_SMOOTH;
+        }
+      }
+    }
+
+    glyph->outline = outline;
+    glyph->globals = globals;
+
+#ifdef COMPUTE_INFLEXS
+    psh_glyph_load_points( glyph, 0 );
+    psh_glyph_compute_inflections( glyph );
+#endif /* COMPUTE_INFLEXS */
+
+    /* now deal with hints tables */
+    error = psh_hint_table_init( &glyph->hint_tables [0],
+                                 &ps_hints->dimension[0].hints,
+                                 &ps_hints->dimension[0].masks,
+                                 &ps_hints->dimension[0].counters,
+                                 memory );
+    if ( error )
+      goto Exit;
+
+    error = psh_hint_table_init( &glyph->hint_tables [1],
+                                 &ps_hints->dimension[1].hints,
+                                 &ps_hints->dimension[1].masks,
+                                 &ps_hints->dimension[1].counters,
+                                 memory );
+    if ( error )
+      goto Exit;
+
+  Exit:
+    return error;
+  }
+
+
+  /* compute all extrema in a glyph for a given dimension */
+  static void
+  psh_glyph_compute_extrema( PSH_Glyph  glyph )
+  {
+    FT_UInt  n;
+
+
+    /* first of all, compute all local extrema */
+    for ( n = 0; n < glyph->num_contours; n++ )
+    {
+      PSH_Point  first = glyph->contours[n].start;
+      PSH_Point  point, before, after;
+
+
+      if ( glyph->contours[n].count == 0 )
+        continue;
+
+      point  = first;
+      before = point;
+      after  = point;
+
+      do
+      {
+        before = before->prev;
+        if ( before == first )
+          goto Skip;
+
+      } while ( before->org_u == point->org_u );
+
+      first = point = before->next;
+
+      for (;;)
+      {
+        after = point;
+        do
+        {
+          after = after->next;
+          if ( after == first )
+            goto Next;
+
+        } while ( after->org_u == point->org_u );
+
+        if ( before->org_u < point->org_u )
+        {
+          if ( after->org_u < point->org_u )
+          {
+            /* local maximum */
+            goto Extremum;
+          }
+        }
+        else /* before->org_u > point->org_u */
+        {
+          if ( after->org_u > point->org_u )
+          {
+            /* local minimum */
+          Extremum:
+            do
+            {
+              psh_point_set_extremum( point );
+              point = point->next;
+
+            } while ( point != after );
+          }
+        }
+
+        before = after->prev;
+        point  = after;
+
+      } /* for  */
+
+    Next:
+      ;
+    }
+
+    /* for each extremum, determine its direction along the */
+    /* orthogonal axis                                      */
+    for ( n = 0; n < glyph->num_points; n++ )
+    {
+      PSH_Point  point, before, after;
+
+
+      point  = &glyph->points[n];
+      before = point;
+      after  = point;
+
+      if ( psh_point_is_extremum( point ) )
+      {
+        do
+        {
+          before = before->prev;
+          if ( before == point )
+            goto Skip;
+
+        } while ( before->org_v == point->org_v );
+
+        do
+        {
+          after = after->next;
+          if ( after == point )
+            goto Skip;
+
+        } while ( after->org_v == point->org_v );
+      }
+
+      if ( before->org_v < point->org_v &&
+           after->org_v  > point->org_v )
+      {
+        psh_point_set_positive( point );
+      }
+      else if ( before->org_v > point->org_v &&
+                after->org_v  < point->org_v )
+      {
+        psh_point_set_negative( point );
+      }
+
+    Skip:
+      ;
+    }
+  }
+
+
+  /* major_dir is the direction for points on the bottom/left of the stem; */
+  /* Points on the top/right of the stem will have a direction of          */
+  /* -major_dir.                                                           */
+
+  static void
+  psh_hint_table_find_strong_points( PSH_Hint_Table  table,
+                                     PSH_Point       point,
+                                     FT_UInt         count,
+                                     FT_Int          threshold,
+                                     FT_Int          major_dir )
+  {
+    PSH_Hint*  sort      = table->sort;
+    FT_UInt    num_hints = table->num_hints;
+
+
+    for ( ; count > 0; count--, point++ )
+    {
+      FT_Int  point_dir = 0;
+      FT_Pos  org_u     = point->org_u;
+
+
+      if ( psh_point_is_strong( point ) )
+        continue;
+
+      if ( PSH_DIR_COMPARE( point->dir_in, major_dir ) )
+        point_dir = point->dir_in;
+
+      else if ( PSH_DIR_COMPARE( point->dir_out, major_dir ) )
+        point_dir = point->dir_out;
+
+      if ( point_dir )
+      {
+        if ( point_dir == major_dir )
+        {
+          FT_UInt  nn;
+
+
+          for ( nn = 0; nn < num_hints; nn++ )
+          {
+            PSH_Hint  hint = sort[nn];
+            FT_Pos    d    = org_u - hint->org_pos;
+
+
+            if ( d < threshold && -d < threshold )
+            {
+              psh_point_set_strong( point );
+              point->flags2 |= PSH_POINT_EDGE_MIN;
+              point->hint    = hint;
+              break;
+            }
+          }
+        }
+        else if ( point_dir == -major_dir )
+        {
+          FT_UInt  nn;
+
+
+          for ( nn = 0; nn < num_hints; nn++ )
+          {
+            PSH_Hint  hint = sort[nn];
+            FT_Pos    d    = org_u - hint->org_pos - hint->org_len;
+
+
+            if ( d < threshold && -d < threshold )
+            {
+              psh_point_set_strong( point );
+              point->flags2 |= PSH_POINT_EDGE_MAX;
+              point->hint    = hint;
+              break;
+            }
+          }
+        }
+      }
+
+#if 1
+      else if ( psh_point_is_extremum( point ) )
+      {
+        /* treat extrema as special cases for stem edge alignment */
+        FT_UInt  nn, min_flag, max_flag;
+
+
+        if ( major_dir == PSH_DIR_HORIZONTAL )
+        {
+          min_flag = PSH_POINT_POSITIVE;
+          max_flag = PSH_POINT_NEGATIVE;
+        }
+        else
+        {
+          min_flag = PSH_POINT_NEGATIVE;
+          max_flag = PSH_POINT_POSITIVE;
+        }
+
+        if ( point->flags2 & min_flag )
+        {
+          for ( nn = 0; nn < num_hints; nn++ )
+          {
+            PSH_Hint  hint = sort[nn];
+            FT_Pos    d    = org_u - hint->org_pos;
+
+
+            if ( d < threshold && -d < threshold )
+            {
+              point->flags2 |= PSH_POINT_EDGE_MIN;
+              point->hint    = hint;
+              psh_point_set_strong( point );
+              break;
+            }
+          }
+        }
+        else if ( point->flags2 & max_flag )
+        {
+          for ( nn = 0; nn < num_hints; nn++ )
+          {
+            PSH_Hint  hint = sort[nn];
+            FT_Pos    d    = org_u - hint->org_pos - hint->org_len;
+
+
+            if ( d < threshold && -d < threshold )
+            {
+              point->flags2 |= PSH_POINT_EDGE_MAX;
+              point->hint    = hint;
+              psh_point_set_strong( point );
+              break;
+            }
+          }
+        }
+
+        if ( point->hint == NULL )
+        {
+          for ( nn = 0; nn < num_hints; nn++ )
+          {
+            PSH_Hint  hint = sort[nn];
+
+
+            if ( org_u >= hint->org_pos                 &&
+                org_u <= hint->org_pos + hint->org_len )
+            {
+              point->hint = hint;
+              break;
+            }
+          }
+        }
+      }
+
+#endif /* 1 */
+    }
+  }
+
+
+  /* the accepted shift for strong points in fractional pixels */
+#define PSH_STRONG_THRESHOLD  32
+
+  /* the maximum shift value in font units */
+#define PSH_STRONG_THRESHOLD_MAXIMUM  30
+
+
+  /* find strong points in a glyph */
+  static void
+  psh_glyph_find_strong_points( PSH_Glyph  glyph,
+                                FT_Int     dimension )
+  {
+    /* a point is `strong' if it is located on a stem edge and       */
+    /* has an `in' or `out' tangent parallel to the hint's direction */
+
+    PSH_Hint_Table  table     = &glyph->hint_tables[dimension];
+    PS_Mask         mask      = table->hint_masks->masks;
+    FT_UInt         num_masks = table->hint_masks->num_masks;
+    FT_UInt         first     = 0;
+    FT_Int          major_dir = dimension == 0 ? PSH_DIR_VERTICAL
+                                               : PSH_DIR_HORIZONTAL;
+    PSH_Dimension   dim       = &glyph->globals->dimension[dimension];
+    FT_Fixed        scale     = dim->scale_mult;
+    FT_Int          threshold;
+
+
+    threshold = (FT_Int)FT_DivFix( PSH_STRONG_THRESHOLD, scale );
+    if ( threshold > PSH_STRONG_THRESHOLD_MAXIMUM )
+      threshold = PSH_STRONG_THRESHOLD_MAXIMUM;
+
+    /* process secondary hints to `selected' points */
+    if ( num_masks > 1 && glyph->num_points > 0 )
+    {
+      first = mask->end_point;
+      mask++;
+      for ( ; num_masks > 1; num_masks--, mask++ )
+      {
+        FT_UInt  next;
+        FT_Int   count;
+
+
+        next  = mask->end_point;
+        count = next - first;
+        if ( count > 0 )
+        {
+          PSH_Point  point = glyph->points + first;
+
+
+          psh_hint_table_activate_mask( table, mask );
+
+          psh_hint_table_find_strong_points( table, point, count,
+                                             threshold, major_dir );
+        }
+        first = next;
+      }
+    }
+
+    /* process primary hints for all points */
+    if ( num_masks == 1 )
+    {
+      FT_UInt    count = glyph->num_points;
+      PSH_Point  point = glyph->points;
+
+
+      psh_hint_table_activate_mask( table, table->hint_masks->masks );
+
+      psh_hint_table_find_strong_points( table, point, count,
+                                         threshold, major_dir );
+    }
+
+    /* now, certain points may have been attached to a hint and */
+    /* not marked as strong; update their flags then            */
+    {
+      FT_UInt    count = glyph->num_points;
+      PSH_Point  point = glyph->points;
+
+
+      for ( ; count > 0; count--, point++ )
+        if ( point->hint && !psh_point_is_strong( point ) )
+          psh_point_set_strong( point );
+    }
+  }
+
+
+  /* find points in a glyph which are in a blue zone and have `in' or */
+  /* `out' tangents parallel to the horizontal axis                   */
+  static void
+  psh_glyph_find_blue_points( PSH_Blues  blues,
+                              PSH_Glyph  glyph )
+  {
+    PSH_Blue_Table  table;
+    PSH_Blue_Zone   zone;
+    FT_UInt         glyph_count = glyph->num_points;
+    FT_UInt         blue_count;
+    PSH_Point       point = glyph->points;
+
+
+    for ( ; glyph_count > 0; glyph_count--, point++ )
+    {
+      FT_Pos  y;
+
+
+      /* check tangents */
+      if ( !PSH_DIR_COMPARE( point->dir_in,  PSH_DIR_HORIZONTAL ) &&
+           !PSH_DIR_COMPARE( point->dir_out, PSH_DIR_HORIZONTAL ) )
+        continue;
+
+      /* skip strong points */
+      if ( psh_point_is_strong( point ) )
+        continue;
+
+      y = point->org_u;
+
+      /* look up top zones */
+      table      = &blues->normal_top;
+      blue_count = table->count;
+      zone       = table->zones;
+
+      for ( ; blue_count > 0; blue_count--, zone++ )
+      {
+        FT_Pos  delta = y - zone->org_bottom;
+
+
+        if ( delta < -blues->blue_fuzz )
+          break;
+
+        if ( y <= zone->org_top + blues->blue_fuzz )
+          if ( blues->no_overshoots || delta <= blues->blue_threshold )
+          {
+            point->cur_u = zone->cur_bottom;
+            psh_point_set_strong( point );
+            psh_point_set_fitted( point );
+          }
+      }
+
+      /* look up bottom zones */
+      table      = &blues->normal_bottom;
+      blue_count = table->count;
+      zone       = table->zones + blue_count - 1;
+
+      for ( ; blue_count > 0; blue_count--, zone-- )
+      {
+        FT_Pos  delta = zone->org_top - y;
+
+
+        if ( delta < -blues->blue_fuzz )
+          break;
+
+        if ( y >= zone->org_bottom - blues->blue_fuzz )
+          if ( blues->no_overshoots || delta < blues->blue_threshold )
+          {
+            point->cur_u = zone->cur_top;
+            psh_point_set_strong( point );
+            psh_point_set_fitted( point );
+          }
+      }
+    }
+  }
+
+
+  /* interpolate strong points with the help of hinted coordinates */
+  static void
+  psh_glyph_interpolate_strong_points( PSH_Glyph  glyph,
+                                       FT_Int     dimension )
+  {
+    PSH_Dimension  dim   = &glyph->globals->dimension[dimension];
+    FT_Fixed       scale = dim->scale_mult;
+
+    FT_UInt        count = glyph->num_points;
+    PSH_Point      point = glyph->points;
+
+
+    for ( ; count > 0; count--, point++ )
+    {
+      PSH_Hint  hint = point->hint;
+
+
+      if ( hint )
+      {
+        FT_Pos  delta;
+
+
+        if ( psh_point_is_edge_min( point ) )
+          point->cur_u = hint->cur_pos;
+
+        else if ( psh_point_is_edge_max( point ) )
+          point->cur_u = hint->cur_pos + hint->cur_len;
+
+        else
+        {
+          delta = point->org_u - hint->org_pos;
+
+          if ( delta <= 0 )
+            point->cur_u = hint->cur_pos + FT_MulFix( delta, scale );
+
+          else if ( delta >= hint->org_len )
+            point->cur_u = hint->cur_pos + hint->cur_len +
+                             FT_MulFix( delta - hint->org_len, scale );
+
+          else if ( hint->org_len > 0 )
+            point->cur_u = hint->cur_pos +
+                             FT_MulDiv( delta, hint->cur_len,
+                                        hint->org_len );
+          else
+            point->cur_u = hint->cur_pos;
+        }
+        psh_point_set_fitted( point );
+      }
+    }
+  }
+
+
+#define  PSH_MAX_STRONG_INTERNAL  16
+
+  static void
+  psh_glyph_interpolate_normal_points( PSH_Glyph  glyph,
+                                       FT_Int     dimension )
+  {
+
+#if 1
+    /* first technique: a point is strong if it is a local extremum */
+
+    PSH_Dimension  dim    = &glyph->globals->dimension[dimension];
+    FT_Fixed       scale  = dim->scale_mult;
+    FT_Memory      memory = glyph->memory;
+
+    PSH_Point*     strongs     = NULL;
+    PSH_Point      strongs_0[PSH_MAX_STRONG_INTERNAL];
+    FT_UInt        num_strongs = 0;
+
+    PSH_Point      points = glyph->points;
+    PSH_Point      points_end = points + glyph->num_points;
+    PSH_Point      point;
+
+
+    /* first count the number of strong points */
+    for ( point = points; point < points_end; point++ )
+    {
+      if ( psh_point_is_strong( point ) )
+        num_strongs++;
+    }
+
+    if ( num_strongs == 0 )  /* nothing to do here */
+      return;
+
+    /* allocate an array to store a list of points, */
+    /* stored in increasing org_u order             */
+    if ( num_strongs <= PSH_MAX_STRONG_INTERNAL )
+      strongs = strongs_0;
+    else
+    {
+      FT_Error  error;
+
+
+      if ( FT_NEW_ARRAY( strongs, num_strongs ) )
+        return;
+    }
+
+    num_strongs = 0;
+    for ( point = points; point < points_end; point++ )
+    {
+      PSH_Point*  insert;
+
+
+      if ( !psh_point_is_strong( point ) )
+        continue;
+
+      for ( insert = strongs + num_strongs; insert > strongs; insert-- )
+      {
+        if ( insert[-1]->org_u <= point->org_u )
+          break;
+
+        insert[0] = insert[-1];
+      }
+      insert[0] = point;
+      num_strongs++;
+    }
+
+    /* now try to interpolate all normal points */
+    for ( point = points; point < points_end; point++ )
+    {
+      if ( psh_point_is_strong( point ) )
+        continue;
+
+      /* sometimes, some local extrema are smooth points */
+      if ( psh_point_is_smooth( point ) )
+      {
+        if ( point->dir_in == PSH_DIR_NONE   ||
+             point->dir_in != point->dir_out )
+          continue;
+
+        if ( !psh_point_is_extremum( point ) &&
+             !psh_point_is_inflex( point )   )
+          continue;
+
+        point->flags &= ~PSH_POINT_SMOOTH;
+      }
+
+      /* find best enclosing point coordinates then interpolate */
+      {
+        PSH_Point   before, after;
+        FT_UInt     nn;
+
+
+        for ( nn = 0; nn < num_strongs; nn++ )
+          if ( strongs[nn]->org_u > point->org_u )
+            break;
+
+        if ( nn == 0 )  /* point before the first strong point */
+        {
+          after = strongs[0];
+
+          point->cur_u = after->cur_u +
+                           FT_MulFix( point->org_u - after->org_u,
+                                      scale );
+        }
+        else
+        {
+          before = strongs[nn - 1];
+
+          for ( nn = num_strongs; nn > 0; nn-- )
+            if ( strongs[nn - 1]->org_u < point->org_u )
+              break;
+
+          if ( nn == num_strongs )  /* point is after last strong point */
+          {
+            before = strongs[nn - 1];
+
+            point->cur_u = before->cur_u +
+                             FT_MulFix( point->org_u - before->org_u,
+                                        scale );
+          }
+          else
+          {
+            FT_Pos  u;
+
+
+            after = strongs[nn];
+
+            /* now interpolate point between before and after */
+            u = point->org_u;
+
+            if ( u == before->org_u )
+              point->cur_u = before->cur_u;
+
+            else if ( u == after->org_u )
+              point->cur_u = after->cur_u;
+
+            else
+              point->cur_u = before->cur_u +
+                               FT_MulDiv( u - before->org_u,
+                                          after->cur_u - before->cur_u,
+                                          after->org_u - before->org_u );
+          }
+        }
+        psh_point_set_fitted( point );
+      }
+    }
+
+    if ( strongs != strongs_0 )
+      FT_FREE( strongs );
+
+#endif /* 1 */
+
+  }
+
+
+  /* interpolate other points */
+  static void
+  psh_glyph_interpolate_other_points( PSH_Glyph  glyph,
+                                      FT_Int     dimension )
+  {
+    PSH_Dimension  dim          = &glyph->globals->dimension[dimension];
+    FT_Fixed       scale        = dim->scale_mult;
+    FT_Fixed       delta        = dim->scale_delta;
+    PSH_Contour    contour      = glyph->contours;
+    FT_UInt        num_contours = glyph->num_contours;
+
+
+    for ( ; num_contours > 0; num_contours--, contour++ )
+    {
+      PSH_Point  start = contour->start;
+      PSH_Point  first, next, point;
+      FT_UInt    fit_count;
+
+
+      /* count the number of strong points in this contour */
+      next      = start + contour->count;
+      fit_count = 0;
+      first     = 0;
+
+      for ( point = start; point < next; point++ )
+        if ( psh_point_is_fitted( point ) )
+        {
+          if ( !first )
+            first = point;
+
+          fit_count++;
+        }
+
+      /* if there are less than 2 fitted points in the contour, we */
+      /* simply scale and eventually translate the contour points  */
+      if ( fit_count < 2 )
+      {
+        if ( fit_count == 1 )
+          delta = first->cur_u - FT_MulFix( first->org_u, scale );
+
+        for ( point = start; point < next; point++ )
+          if ( point != first )
+            point->cur_u = FT_MulFix( point->org_u, scale ) + delta;
+
+        goto Next_Contour;
+      }
+
+      /* there are more than 2 strong points in this contour; we */
+      /* need to interpolate weak points between them            */
+      start = first;
+      do
+      {
+        point = first;
+
+        /* skip consecutive fitted points */
+        for (;;)
+        {
+          next = first->next;
+          if ( next == start )
+            goto Next_Contour;
+
+          if ( !psh_point_is_fitted( next ) )
+            break;
+
+          first = next;
+        }
+
+        /* find next fitted point after unfitted one */
+        for (;;)
+        {
+          next = next->next;
+          if ( psh_point_is_fitted( next ) )
+            break;
+        }
+
+        /* now interpolate between them */
+        {
+          FT_Pos    org_a, org_ab, cur_a, cur_ab;
+          FT_Pos    org_c, org_ac, cur_c;
+          FT_Fixed  scale_ab;
+
+
+          if ( first->org_u <= next->org_u )
+          {
+            org_a  = first->org_u;
+            cur_a  = first->cur_u;
+            org_ab = next->org_u - org_a;
+            cur_ab = next->cur_u - cur_a;
+          }
+          else
+          {
+            org_a  = next->org_u;
+            cur_a  = next->cur_u;
+            org_ab = first->org_u - org_a;
+            cur_ab = first->cur_u - cur_a;
+          }
+
+          scale_ab = 0x10000L;
+          if ( org_ab > 0 )
+            scale_ab = FT_DivFix( cur_ab, org_ab );
+
+          point = first->next;
+          do
+          {
+            org_c  = point->org_u;
+            org_ac = org_c - org_a;
+
+            if ( org_ac <= 0 )
+            {
+              /* on the left of the interpolation zone */
+              cur_c = cur_a + FT_MulFix( org_ac, scale );
+            }
+            else if ( org_ac >= org_ab )
+            {
+              /* on the right on the interpolation zone */
+              cur_c = cur_a + cur_ab + FT_MulFix( org_ac - org_ab, scale );
+            }
+            else
+            {
+              /* within the interpolation zone */
+              cur_c = cur_a + FT_MulFix( org_ac, scale_ab );
+            }
+
+            point->cur_u = cur_c;
+
+            point = point->next;
+
+          } while ( point != next );
+        }
+
+        /* keep going until all points in the contours have been processed */
+        first = next;
+
+      } while ( first != start );
+
+    Next_Contour:
+      ;
+    }
+  }
+
+
+  /*************************************************************************/
+  /*************************************************************************/
+  /*****                                                               *****/
+  /*****                     HIGH-LEVEL INTERFACE                      *****/
+  /*****                                                               *****/
+  /*************************************************************************/
+  /*************************************************************************/
+
+  FT_Error
+  ps_hints_apply( PS_Hints        ps_hints,
+                  FT_Outline*     outline,
+                  PSH_Globals     globals,
+                  FT_Render_Mode  hint_mode )
+  {
+    PSH_GlyphRec  glyphrec;
+    PSH_Glyph     glyph = &glyphrec;
+    FT_Error      error;
+#ifdef DEBUG_HINTER
+    FT_Memory     memory;
+#endif
+    FT_Int        dimension;
+
+
+    /* something to do? */
+    if ( outline->n_points == 0 || outline->n_contours == 0 )
+      return PSH_Err_Ok;
+
+#ifdef DEBUG_HINTER
+
+    memory = globals->memory;
+
+    if ( ps_debug_glyph )
+    {
+      psh_glyph_done( ps_debug_glyph );
+      FT_FREE( ps_debug_glyph );
+    }
+
+    if ( FT_NEW( glyph ) )
+      return error;
+
+    ps_debug_glyph = glyph;
+
+#endif /* DEBUG_HINTER */
+
+    error = psh_glyph_init( glyph, outline, ps_hints, globals );
+    if ( error )
+      goto Exit;
+
+    /* try to optimize the y_scale so that the top of non-capital letters
+     * is aligned on a pixel boundary whenever possible
+     */
+    {
+      PSH_Dimension  dim_x = &glyph->globals->dimension[0];
+      PSH_Dimension  dim_y = &glyph->globals->dimension[1];
+
+      FT_Fixed  x_scale = dim_x->scale_mult;
+      FT_Fixed  y_scale = dim_y->scale_mult;
+
+      FT_Fixed  old_x_scale = x_scale;
+      FT_Fixed  old_y_scale = y_scale;
+
+      FT_Fixed  scaled;
+      FT_Fixed  fitted;
+
+      FT_Bool  rescale = FALSE;
+
+
+      scaled = FT_MulFix( globals->blues.normal_top.zones->org_ref, y_scale );
+      fitted = FT_PIX_ROUND( scaled );
+
+      if ( fitted != 0 && scaled != fitted )
+      {
+        rescale = TRUE;
+
+        y_scale = FT_MulDiv( y_scale, fitted, scaled );
+
+        if ( fitted < scaled )
+          x_scale -= x_scale / 50;
+
+        psh_globals_set_scale( glyph->globals, x_scale, y_scale, 0, 0 );
+      }
+
+      glyph->do_horz_hints = 1;
+      glyph->do_vert_hints = 1;
+
+      glyph->do_horz_snapping = FT_BOOL( hint_mode == FT_RENDER_MODE_MONO ||
+                                         hint_mode == FT_RENDER_MODE_LCD  );
+
+      glyph->do_vert_snapping = FT_BOOL( hint_mode == FT_RENDER_MODE_MONO  ||
+                                         hint_mode == FT_RENDER_MODE_LCD_V );
+
+      glyph->do_stem_adjust   = FT_BOOL( hint_mode != FT_RENDER_MODE_LIGHT );
+
+      for ( dimension = 0; dimension < 2; dimension++ )
+      {
+        /* load outline coordinates into glyph */
+        psh_glyph_load_points( glyph, dimension );
+
+        /* compute local extrema */
+        psh_glyph_compute_extrema( glyph );
+
+        /* compute aligned stem/hints positions */
+        psh_hint_table_align_hints( &glyph->hint_tables[dimension],
+                                    glyph->globals,
+                                    dimension,
+                                    glyph );
+
+        /* find strong points, align them, then interpolate others */
+        psh_glyph_find_strong_points( glyph, dimension );
+        if ( dimension == 1 )
+          psh_glyph_find_blue_points( &globals->blues, glyph );
+        psh_glyph_interpolate_strong_points( glyph, dimension );
+        psh_glyph_interpolate_normal_points( glyph, dimension );
+        psh_glyph_interpolate_other_points( glyph, dimension );
+
+        /* save hinted coordinates back to outline */
+        psh_glyph_save_points( glyph, dimension );
+
+        if ( rescale )
+          psh_globals_set_scale( glyph->globals,
+                                 old_x_scale, old_y_scale, 0, 0 );
+      }
+    }
+
+  Exit:
+
+#ifndef DEBUG_HINTER
+    psh_glyph_done( glyph );
+#endif
+
+    return error;
+  }
+
+
+/* END */
diff --git a/src/pshinter/pshalgo.h b/src/pshinter/pshalgo.h
new file mode 100644
index 0000000..1a248a7
--- /dev/null
+++ b/src/pshinter/pshalgo.h
@@ -0,0 +1,255 @@
+/***************************************************************************/
+/*                                                                         */
+/*  pshalgo.h                                                              */
+/*                                                                         */
+/*    PostScript hinting algorithm (specification).                        */
+/*                                                                         */
+/*  Copyright 2001, 2002, 2003, 2008 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 __PSHALGO_H__
+#define __PSHALGO_H__
+
+
+#include "pshrec.h"
+#include "pshglob.h"
+#include FT_TRIGONOMETRY_H
+
+
+FT_BEGIN_HEADER
+
+
+  /* handle to Hint structure */
+  typedef struct PSH_HintRec_*  PSH_Hint;
+
+  /* hint bit-flags */
+  typedef enum  PSH_Hint_Flags_
+  {
+    PSH_HINT_GHOST  = PS_HINT_FLAG_GHOST,
+    PSH_HINT_BOTTOM = PS_HINT_FLAG_BOTTOM,
+    PSH_HINT_ACTIVE = 4,
+    PSH_HINT_FITTED = 8
+
+  } PSH_Hint_Flags;
+
+
+#define psh_hint_is_active( x )  ( ( (x)->flags & PSH_HINT_ACTIVE ) != 0 )
+#define psh_hint_is_ghost( x )   ( ( (x)->flags & PSH_HINT_GHOST  ) != 0 )
+#define psh_hint_is_fitted( x )  ( ( (x)->flags & PSH_HINT_FITTED ) != 0 )
+
+#define psh_hint_activate( x )    (x)->flags |=  PSH_HINT_ACTIVE
+#define psh_hint_deactivate( x )  (x)->flags &= ~PSH_HINT_ACTIVE
+#define psh_hint_set_fitted( x )  (x)->flags |=  PSH_HINT_FITTED
+
+  /* hint structure */
+  typedef struct  PSH_HintRec_
+  {
+    FT_Int    org_pos;
+    FT_Int    org_len;
+    FT_Pos    cur_pos;
+    FT_Pos    cur_len;
+    FT_UInt   flags;
+    PSH_Hint  parent;
+    FT_Int    order;
+
+  } PSH_HintRec;
+
+
+  /* this is an interpolation zone used for strong points;  */
+  /* weak points are interpolated according to their strong */
+  /* neighbours                                             */
+  typedef struct  PSH_ZoneRec_
+  {
+    FT_Fixed  scale;
+    FT_Fixed  delta;
+    FT_Pos    min;
+    FT_Pos    max;
+
+  } PSH_ZoneRec, *PSH_Zone;
+
+
+  typedef struct  PSH_Hint_TableRec_
+  {
+    FT_UInt        max_hints;
+    FT_UInt        num_hints;
+    PSH_Hint       hints;
+    PSH_Hint*      sort;
+    PSH_Hint*      sort_global;
+    FT_UInt        num_zones;
+    PSH_ZoneRec*   zones;
+    PSH_Zone       zone;
+    PS_Mask_Table  hint_masks;
+    PS_Mask_Table  counter_masks;
+
+  } PSH_Hint_TableRec, *PSH_Hint_Table;
+
+
+  typedef struct PSH_PointRec_*    PSH_Point;
+  typedef struct PSH_ContourRec_*  PSH_Contour;
+
+  enum
+  {
+    PSH_DIR_NONE  =  4,
+    PSH_DIR_UP    = -1,
+    PSH_DIR_DOWN  =  1,
+    PSH_DIR_LEFT  = -2,
+    PSH_DIR_RIGHT =  2
+  };
+
+#define PSH_DIR_HORIZONTAL  2
+#define PSH_DIR_VERTICAL    1
+
+#define PSH_DIR_COMPARE( d1, d2 )   ( (d1) == (d2) || (d1) == -(d2) )
+#define PSH_DIR_IS_HORIZONTAL( d )  PSH_DIR_COMPARE( d, PSH_DIR_HORIZONTAL )
+#define PSH_DIR_IS_VERTICAL( d )    PSH_DIR_COMPARE( d, PSH_DIR_VERTICAL )
+
+
+ /* the following bit-flags are computed once by the glyph */
+ /* analyzer, for both dimensions                          */
+  enum
+  {
+    PSH_POINT_OFF    = 1,   /* point is off the curve */
+    PSH_POINT_SMOOTH = 2,   /* point is smooth        */
+    PSH_POINT_INFLEX = 4    /* point is inflection    */
+  };
+
+#define psh_point_is_smooth( p )  ( (p)->flags & PSH_POINT_SMOOTH )
+#define psh_point_is_off( p )     ( (p)->flags & PSH_POINT_OFF    )
+#define psh_point_is_inflex( p )  ( (p)->flags & PSH_POINT_INFLEX )
+
+#define psh_point_set_smooth( p )  (p)->flags |= PSH_POINT_SMOOTH
+#define psh_point_set_off( p )     (p)->flags |= PSH_POINT_OFF
+#define psh_point_set_inflex( p )  (p)->flags |= PSH_POINT_INFLEX
+
+  /* the following bit-flags are re-computed for each dimension */
+  enum
+  {
+    PSH_POINT_STRONG   = 16,   /* point is strong                           */
+    PSH_POINT_FITTED   = 32,   /* point is already fitted                   */
+    PSH_POINT_EXTREMUM = 64,   /* point is local extremum                   */
+    PSH_POINT_POSITIVE = 128,  /* extremum has positive contour flow        */
+    PSH_POINT_NEGATIVE = 256,  /* extremum has negative contour flow        */
+    PSH_POINT_EDGE_MIN = 512,  /* point is aligned to left/bottom stem edge */
+    PSH_POINT_EDGE_MAX = 1024  /* point is aligned to top/right stem edge   */
+  };
+
+#define psh_point_is_strong( p )    ( (p)->flags2 & PSH_POINT_STRONG )
+#define psh_point_is_fitted( p )    ( (p)->flags2 & PSH_POINT_FITTED )
+#define psh_point_is_extremum( p )  ( (p)->flags2 & PSH_POINT_EXTREMUM )
+#define psh_point_is_positive( p )  ( (p)->flags2 & PSH_POINT_POSITIVE )
+#define psh_point_is_negative( p )  ( (p)->flags2 & PSH_POINT_NEGATIVE )
+#define psh_point_is_edge_min( p )  ( (p)->flags2 & PSH_POINT_EDGE_MIN )
+#define psh_point_is_edge_max( p )  ( (p)->flags2 & PSH_POINT_EDGE_MAX )
+
+#define psh_point_set_strong( p )    (p)->flags2 |= PSH_POINT_STRONG
+#define psh_point_set_fitted( p )    (p)->flags2 |= PSH_POINT_FITTED
+#define psh_point_set_extremum( p )  (p)->flags2 |= PSH_POINT_EXTREMUM
+#define psh_point_set_positive( p )  (p)->flags2 |= PSH_POINT_POSITIVE
+#define psh_point_set_negative( p )  (p)->flags2 |= PSH_POINT_NEGATIVE
+#define psh_point_set_edge_min( p )  (p)->flags2 |= PSH_POINT_EDGE_MIN
+#define psh_point_set_edge_max( p )  (p)->flags2 |= PSH_POINT_EDGE_MAX
+
+
+  typedef struct  PSH_PointRec_
+  {
+    PSH_Point    prev;
+    PSH_Point    next;
+    PSH_Contour  contour;
+    FT_UInt      flags;
+    FT_UInt      flags2;
+    FT_Char      dir_in;
+    FT_Char      dir_out;
+    FT_Angle     angle_in;
+    FT_Angle     angle_out;
+    PSH_Hint     hint;
+    FT_Pos       org_u;
+    FT_Pos       org_v;
+    FT_Pos       cur_u;
+#ifdef DEBUG_HINTER
+    FT_Pos       org_x;
+    FT_Pos       cur_x;
+    FT_Pos       org_y;
+    FT_Pos       cur_y;
+    FT_UInt      flags_x;
+    FT_UInt      flags_y;
+#endif
+
+  } PSH_PointRec;
+
+
+#define PSH_POINT_EQUAL_ORG( a, b )  ( (a)->org_u == (b)->org_u && \
+                                       (a)->org_v == (b)->org_v )
+
+#define PSH_POINT_ANGLE( a, b )  FT_Atan2( (b)->org_u - (a)->org_u,  \
+                                           (b)->org_v - (a)->org_v )
+
+  typedef struct  PSH_ContourRec_
+  {
+    PSH_Point  start;
+    FT_UInt    count;
+
+  } PSH_ContourRec;
+
+
+  typedef struct  PSH_GlyphRec_
+  {
+    FT_UInt            num_points;
+    FT_UInt            num_contours;
+
+    PSH_Point          points;
+    PSH_Contour        contours;
+
+    FT_Memory          memory;
+    FT_Outline*        outline;
+    PSH_Globals        globals;
+    PSH_Hint_TableRec  hint_tables[2];
+
+    FT_Bool            vertical;
+    FT_Int             major_dir;
+    FT_Int             minor_dir;
+
+    FT_Bool            do_horz_hints;
+    FT_Bool            do_vert_hints;
+    FT_Bool            do_horz_snapping;
+    FT_Bool            do_vert_snapping;
+    FT_Bool            do_stem_adjust;
+
+  } PSH_GlyphRec, *PSH_Glyph;
+
+
+#ifdef DEBUG_HINTER
+  extern PSH_Hint_Table  ps_debug_hint_table;
+
+  typedef void
+  (*PSH_HintFunc)( PSH_Hint  hint,
+                   FT_Bool   vertical );
+
+  extern PSH_HintFunc    ps_debug_hint_func;
+
+  extern PSH_Glyph       ps_debug_glyph;
+#endif
+
+
+  extern FT_Error
+  ps_hints_apply( PS_Hints        ps_hints,
+                  FT_Outline*     outline,
+                  PSH_Globals     globals,
+                  FT_Render_Mode  hint_mode );
+
+
+FT_END_HEADER
+
+
+#endif /* __PSHALGO_H__ */
+
+
+/* END */
diff --git a/src/pshinter/pshglob.c b/src/pshinter/pshglob.c
new file mode 100644
index 0000000..8a69aa1
--- /dev/null
+++ b/src/pshinter/pshglob.c
@@ -0,0 +1,750 @@
+/***************************************************************************/
+/*                                                                         */
+/*  pshglob.c                                                              */
+/*                                                                         */
+/*    PostScript hinter global hinting management (body).                  */
+/*    Inspired by the new auto-hinter module.                              */
+/*                                                                         */
+/*  Copyright 2001, 2002, 2003, 2004, 2006 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.                                        */
+/*                                                                         */
+/***************************************************************************/
+
+
+#include <ft2build.h>
+#include FT_FREETYPE_H
+#include FT_INTERNAL_OBJECTS_H
+#include "pshglob.h"
+
+#ifdef DEBUG_HINTER
+  PSH_Globals  ps_debug_globals = 0;
+#endif
+
+
+  /*************************************************************************/
+  /*************************************************************************/
+  /*****                                                               *****/
+  /*****                       STANDARD WIDTHS                         *****/
+  /*****                                                               *****/
+  /*************************************************************************/
+  /*************************************************************************/
+
+
+  /* scale the widths/heights table */
+  static void
+  psh_globals_scale_widths( PSH_Globals  globals,
+                            FT_UInt      direction )
+  {
+    PSH_Dimension  dim   = &globals->dimension[direction];
+    PSH_Widths     stdw  = &dim->stdw;
+    FT_UInt        count = stdw->count;
+    PSH_Width      width = stdw->widths;
+    PSH_Width      stand = width;               /* standard width/height */
+    FT_Fixed       scale = dim->scale_mult;
+
+
+    if ( count > 0 )
+    {
+      width->cur = FT_MulFix( width->org, scale );
+      width->fit = FT_PIX_ROUND( width->cur );
+
+      width++;
+      count--;
+
+      for ( ; count > 0; count--, width++ )
+      {
+        FT_Pos  w, dist;
+
+
+        w    = FT_MulFix( width->org, scale );
+        dist = w - stand->cur;
+
+        if ( dist < 0 )
+          dist = -dist;
+
+        if ( dist < 128 )
+          w = stand->cur;
+
+        width->cur = w;
+        width->fit = FT_PIX_ROUND( w );
+      }
+    }
+  }
+
+
+#if 0
+
+  /* org_width is is font units, result in device pixels, 26.6 format */
+  FT_LOCAL_DEF( FT_Pos )
+  psh_dimension_snap_width( PSH_Dimension  dimension,
+                            FT_Int         org_width )
+  {
+    FT_UInt  n;
+    FT_Pos   width     = FT_MulFix( org_width, dimension->scale_mult );
+    FT_Pos   best      = 64 + 32 + 2;
+    FT_Pos   reference = width;
+
+
+    for ( n = 0; n < dimension->stdw.count; n++ )
+    {
+      FT_Pos  w;
+      FT_Pos  dist;
+
+
+      w = dimension->stdw.widths[n].cur;
+      dist = width - w;
+      if ( dist < 0 )
+        dist = -dist;
+      if ( dist < best )
+      {
+        best      = dist;
+        reference = w;
+      }
+    }
+
+    if ( width >= reference )
+    {
+      width -= 0x21;
+      if ( width < reference )
+        width = reference;
+    }
+    else
+    {
+      width += 0x21;
+      if ( width > reference )
+        width = reference;
+    }
+
+    return width;
+  }
+
+#endif /* 0 */
+
+
+  /*************************************************************************/
+  /*************************************************************************/
+  /*****                                                               *****/
+  /*****                       BLUE ZONES                              *****/
+  /*****                                                               *****/
+  /*************************************************************************/
+  /*************************************************************************/
+
+  static void
+  psh_blues_set_zones_0( PSH_Blues       target,
+                         FT_Bool         is_others,
+                         FT_UInt         read_count,
+                         FT_Short*       read,
+                         PSH_Blue_Table  top_table,
+                         PSH_Blue_Table  bot_table )
+  {
+    FT_UInt  count_top = top_table->count;
+    FT_UInt  count_bot = bot_table->count;
+    FT_Bool  first     = 1;
+
+    FT_UNUSED( target );
+
+
+    for ( ; read_count > 1; read_count -= 2 )
+    {
+      FT_Int         reference, delta;
+      FT_UInt        count;
+      PSH_Blue_Zone  zones, zone;
+      FT_Bool        top;
+
+
+      /* read blue zone entry, and select target top/bottom zone */
+      top = 0;
+      if ( first || is_others )
+      {
+        reference = read[1];
+        delta     = read[0] - reference;
+
+        zones = bot_table->zones;
+        count = count_bot;
+        first = 0;
+      }
+      else
+      {
+        reference = read[0];
+        delta     = read[1] - reference;
+
+        zones = top_table->zones;
+        count = count_top;
+        top   = 1;
+      }
+
+      /* insert into sorted table */
+      zone = zones;
+      for ( ; count > 0; count--, zone++ )
+      {
+        if ( reference < zone->org_ref )
+          break;
+
+        if ( reference == zone->org_ref )
+        {
+          FT_Int  delta0 = zone->org_delta;
+
+
+          /* we have two zones on the same reference position -- */
+          /* only keep the largest one                           */
+          if ( delta < 0 )
+          {
+            if ( delta < delta0 )
+              zone->org_delta = delta;
+          }
+          else
+          {
+            if ( delta > delta0 )
+              zone->org_delta = delta;
+          }
+          goto Skip;
+        }
+      }
+
+      for ( ; count > 0; count-- )
+        zone[count] = zone[count-1];
+
+      zone->org_ref   = reference;
+      zone->org_delta = delta;
+
+      if ( top )
+        count_top++;
+      else
+        count_bot++;
+
+    Skip:
+      read += 2;
+    }
+
+    top_table->count = count_top;
+    bot_table->count = count_bot;
+  }
+
+
+  /* Re-read blue zones from the original fonts and store them into out */
+  /* private structure.  This function re-orders, sanitizes and         */
+  /* fuzz-expands the zones as well.                                    */
+  static void
+  psh_blues_set_zones( PSH_Blues  target,
+                       FT_UInt    count,
+                       FT_Short*  blues,
+                       FT_UInt    count_others,
+                       FT_Short*  other_blues,
+                       FT_Int     fuzz,
+                       FT_Int     family )
+  {
+    PSH_Blue_Table  top_table, bot_table;
+    FT_Int          count_top, count_bot;
+
+
+    if ( family )
+    {
+      top_table = &target->family_top;
+      bot_table = &target->family_bottom;
+    }
+    else
+    {
+      top_table = &target->normal_top;
+      bot_table = &target->normal_bottom;
+    }
+
+    /* read the input blue zones, and build two sorted tables  */
+    /* (one for the top zones, the other for the bottom zones) */
+    top_table->count = 0;
+    bot_table->count = 0;
+
+    /* first, the blues */
+    psh_blues_set_zones_0( target, 0,
+                           count, blues, top_table, bot_table );
+    psh_blues_set_zones_0( target, 1,
+                           count_others, other_blues, top_table, bot_table );
+
+    count_top = top_table->count;
+    count_bot = bot_table->count;
+
+    /* sanitize top table */
+    if ( count_top > 0 )
+    {
+      PSH_Blue_Zone  zone = top_table->zones;
+
+
+      for ( count = count_top; count > 0; count--, zone++ )
+      {
+        FT_Int  delta;
+
+
+        if ( count > 1 )
+        {
+          delta = zone[1].org_ref - zone[0].org_ref;
+          if ( zone->org_delta > delta )
+            zone->org_delta = delta;
+        }
+
+        zone->org_bottom = zone->org_ref;
+        zone->org_top    = zone->org_delta + zone->org_ref;
+      }
+    }
+
+    /* sanitize bottom table */
+    if ( count_bot > 0 )
+    {
+      PSH_Blue_Zone  zone = bot_table->zones;
+
+
+      for ( count = count_bot; count > 0; count--, zone++ )
+      {
+        FT_Int  delta;
+
+
+        if ( count > 1 )
+        {
+          delta = zone[0].org_ref - zone[1].org_ref;
+          if ( zone->org_delta < delta )
+            zone->org_delta = delta;
+        }
+
+        zone->org_top    = zone->org_ref;
+        zone->org_bottom = zone->org_delta + zone->org_ref;
+      }
+    }
+
+    /* expand top and bottom tables with blue fuzz */
+    {
+      FT_Int         dim, top, bot, delta;
+      PSH_Blue_Zone  zone;
+
+
+      zone  = top_table->zones;
+      count = count_top;
+
+      for ( dim = 1; dim >= 0; dim-- )
+      {
+        if ( count > 0 )
+        {
+          /* expand the bottom of the lowest zone normally */
+          zone->org_bottom -= fuzz;
+
+          /* expand the top and bottom of intermediate zones;    */
+          /* checking that the interval is smaller than the fuzz */
+          top = zone->org_top;
+
+          for ( count--; count > 0; count-- )
+          {
+            bot   = zone[1].org_bottom;
+            delta = bot - top;
+
+            if ( delta < 2 * fuzz )
+              zone[0].org_top = zone[1].org_bottom = top + delta / 2;
+            else
+            {
+              zone[0].org_top    = top + fuzz;
+              zone[1].org_bottom = bot - fuzz;
+            }
+
+            zone++;
+            top = zone->org_top;
+          }
+
+          /* expand the top of the highest zone normally */
+          zone->org_top = top + fuzz;
+        }
+        zone  = bot_table->zones;
+        count = count_bot;
+      }
+    }
+  }
+
+
+  /* reset the blues table when the device transform changes */
+  static void
+  psh_blues_scale_zones( PSH_Blues  blues,
+                         FT_Fixed   scale,
+                         FT_Pos     delta )
+  {
+    FT_UInt         count;
+    FT_UInt         num;
+    PSH_Blue_Table  table = 0;
+
+    /*                                                        */
+    /* Determine whether we need to suppress overshoots or    */
+    /* not.  We simply need to compare the vertical scale     */
+    /* parameter to the raw bluescale value.  Here is why:    */
+    /*                                                        */
+    /*   We need to suppress overshoots for all pointsizes.   */
+    /*   At 300dpi that satisfies:                            */
+    /*                                                        */
+    /*      pointsize < 240*bluescale + 0.49                  */
+    /*                                                        */
+    /*   This corresponds to:                                 */
+    /*                                                        */
+    /*      pixelsize < 1000*bluescale + 49/24                */
+    /*                                                        */
+    /*      scale*EM_Size < 1000*bluescale + 49/24            */
+    /*                                                        */
+    /*   However, for normal Type 1 fonts, EM_Size is 1000!   */
+    /*   We thus only check:                                  */
+    /*                                                        */
+    /*      scale < bluescale + 49/24000                      */
+    /*                                                        */
+    /*   which we shorten to                                  */
+    /*                                                        */
+    /*      "scale < bluescale"                               */
+    /*                                                        */
+    /* Note that `blue_scale' is stored 1000 times its real   */
+    /* value, and that `scale' converts from font units to    */
+    /* fractional pixels.                                     */
+    /*                                                        */
+
+    /* 1000 / 64 = 125 / 8 */
+    if ( scale >= 0x20C49BAL )
+      blues->no_overshoots = FT_BOOL( scale < blues->blue_scale * 8 / 125 );
+    else
+      blues->no_overshoots = FT_BOOL( scale * 125 < blues->blue_scale * 8 );
+
+    /*                                                        */
+    /*  The blue threshold is the font units distance under   */
+    /*  which overshoots are suppressed due to the BlueShift  */
+    /*  even if the scale is greater than BlueScale.          */
+    /*                                                        */
+    /*  It is the smallest distance such that                 */
+    /*                                                        */
+    /*    dist <= BlueShift && dist*scale <= 0.5 pixels       */
+    /*                                                        */
+    {
+      FT_Int  threshold = blues->blue_shift;
+
+
+      while ( threshold > 0 && FT_MulFix( threshold, scale ) > 32 )
+        threshold--;
+
+      blues->blue_threshold = threshold;
+    }
+
+    for ( num = 0; num < 4; num++ )
+    {
+      PSH_Blue_Zone  zone;
+
+
+      switch ( num )
+      {
+      case 0:
+        table = &blues->normal_top;
+        break;
+      case 1:
+        table = &blues->normal_bottom;
+        break;
+      case 2:
+        table = &blues->family_top;
+        break;
+      default:
+        table = &blues->family_bottom;
+        break;
+      }
+
+      zone  = table->zones;
+      count = table->count;
+      for ( ; count > 0; count--, zone++ )
+      {
+        zone->cur_top    = FT_MulFix( zone->org_top,    scale ) + delta;
+        zone->cur_bottom = FT_MulFix( zone->org_bottom, scale ) + delta;
+        zone->cur_ref    = FT_MulFix( zone->org_ref,    scale ) + delta;
+        zone->cur_delta  = FT_MulFix( zone->org_delta,  scale );
+
+        /* round scaled reference position */
+        zone->cur_ref = FT_PIX_ROUND( zone->cur_ref );
+
+#if 0
+        if ( zone->cur_ref > zone->cur_top )
+          zone->cur_ref -= 64;
+        else if ( zone->cur_ref < zone->cur_bottom )
+          zone->cur_ref += 64;
+#endif
+      }
+    }
+
+    /* process the families now */
+
+    for ( num = 0; num < 2; num++ )
+    {
+      PSH_Blue_Zone   zone1, zone2;
+      FT_UInt         count1, count2;
+      PSH_Blue_Table  normal, family;
+
+
+      switch ( num )
+      {
+      case 0:
+        normal = &blues->normal_top;
+        family = &blues->family_top;
+        break;
+
+      default:
+        normal = &blues->normal_bottom;
+        family = &blues->family_bottom;
+      }
+
+      zone1  = normal->zones;
+      count1 = normal->count;
+
+      for ( ; count1 > 0; count1--, zone1++ )
+      {
+        /* try to find a family zone whose reference position is less */
+        /* than 1 pixel far from the current zone                     */
+        zone2  = family->zones;
+        count2 = family->count;
+
+        for ( ; count2 > 0; count2--, zone2++ )
+        {
+          FT_Pos  Delta;
+
+
+          Delta = zone1->org_ref - zone2->org_ref;
+          if ( Delta < 0 )
+            Delta = -Delta;
+
+          if ( FT_MulFix( Delta, scale ) < 64 )
+          {
+            zone1->cur_top    = zone2->cur_top;
+            zone1->cur_bottom = zone2->cur_bottom;
+            zone1->cur_ref    = zone2->cur_ref;
+            zone1->cur_delta  = zone2->cur_delta;
+            break;
+          }
+        }
+      }
+    }
+  }
+
+
+  FT_LOCAL_DEF( void )
+  psh_blues_snap_stem( PSH_Blues      blues,
+                       FT_Int         stem_top,
+                       FT_Int         stem_bot,
+                       PSH_Alignment  alignment )
+  {
+    PSH_Blue_Table  table;
+    FT_UInt         count;
+    FT_Pos          delta;
+    PSH_Blue_Zone   zone;
+    FT_Int          no_shoots;
+
+
+    alignment->align = PSH_BLUE_ALIGN_NONE;
+
+    no_shoots = blues->no_overshoots;
+
+    /* look up stem top in top zones table */
+    table = &blues->normal_top;
+    count = table->count;
+    zone  = table->zones;
+
+    for ( ; count > 0; count--, zone++ )
+    {
+      delta = stem_top - zone->org_bottom;
+      if ( delta < -blues->blue_fuzz )
+        break;
+
+      if ( stem_top <= zone->org_top + blues->blue_fuzz )
+      {
+        if ( no_shoots || delta <= blues->blue_threshold )
+        {
+          alignment->align    |= PSH_BLUE_ALIGN_TOP;
+          alignment->align_top = zone->cur_ref;
+        }
+        break;
+      }
+    }
+
+    /* look up stem bottom in bottom zones table */
+    table = &blues->normal_bottom;
+    count = table->count;
+    zone  = table->zones + count-1;
+
+    for ( ; count > 0; count--, zone-- )
+    {
+      delta = zone->org_top - stem_bot;
+      if ( delta < -blues->blue_fuzz )
+        break;
+
+      if ( stem_bot >= zone->org_bottom - blues->blue_fuzz )
+      {
+        if ( no_shoots || delta < blues->blue_threshold )
+        {
+          alignment->align    |= PSH_BLUE_ALIGN_BOT;
+          alignment->align_bot = zone->cur_ref;
+        }
+        break;
+      }
+    }
+  }
+
+
+  /*************************************************************************/
+  /*************************************************************************/
+  /*****                                                               *****/
+  /*****                        GLOBAL HINTS                           *****/
+  /*****                                                               *****/
+  /*************************************************************************/
+  /*************************************************************************/
+
+  static void
+  psh_globals_destroy( PSH_Globals  globals )
+  {
+    if ( globals )
+    {
+      FT_Memory  memory;
+
+
+      memory = globals->memory;
+      globals->dimension[0].stdw.count = 0;
+      globals->dimension[1].stdw.count = 0;
+
+      globals->blues.normal_top.count    = 0;
+      globals->blues.normal_bottom.count = 0;
+      globals->blues.family_top.count    = 0;
+      globals->blues.family_bottom.count = 0;
+
+      FT_FREE( globals );
+
+#ifdef DEBUG_HINTER
+      ps_debug_globals = 0;
+#endif
+    }
+  }
+
+
+  static FT_Error
+  psh_globals_new( FT_Memory     memory,
+                   T1_Private*   priv,
+                   PSH_Globals  *aglobals )
+  {
+    PSH_Globals  globals;
+    FT_Error     error;
+
+
+    if ( !FT_NEW( globals ) )
+    {
+      FT_UInt    count;
+      FT_Short*  read;
+
+
+      globals->memory = memory;
+
+      /* copy standard widths */
+      {
+        PSH_Dimension  dim   = &globals->dimension[1];
+        PSH_Width      write = dim->stdw.widths;
+
+
+        write->org = priv->standard_width[0];
+        write++;
+
+        read = priv->snap_widths;
+        for ( count = priv->num_snap_widths; count > 0; count-- )
+        {
+          write->org = *read;
+          write++;
+          read++;
+        }
+
+        dim->stdw.count = priv->num_snap_widths + 1;
+      }
+
+      /* copy standard heights */
+      {
+        PSH_Dimension  dim = &globals->dimension[0];
+        PSH_Width      write = dim->stdw.widths;
+
+
+        write->org = priv->standard_height[0];
+        write++;
+        read = priv->snap_heights;
+        for ( count = priv->num_snap_heights; count > 0; count-- )
+        {
+          write->org = *read;
+          write++;
+          read++;
+        }
+
+        dim->stdw.count = priv->num_snap_heights + 1;
+      }
+
+      /* copy blue zones */
+      psh_blues_set_zones( &globals->blues, priv->num_blue_values,
+                           priv->blue_values, priv->num_other_blues,
+                           priv->other_blues, priv->blue_fuzz, 0 );
+
+      psh_blues_set_zones( &globals->blues, priv->num_family_blues,
+                           priv->family_blues, priv->num_family_other_blues,
+                           priv->family_other_blues, priv->blue_fuzz, 1 );
+
+      globals->blues.blue_scale = priv->blue_scale;
+      globals->blues.blue_shift = priv->blue_shift;
+      globals->blues.blue_fuzz  = priv->blue_fuzz;
+
+      globals->dimension[0].scale_mult  = 0;
+      globals->dimension[0].scale_delta = 0;
+      globals->dimension[1].scale_mult  = 0;
+      globals->dimension[1].scale_delta = 0;
+
+#ifdef DEBUG_HINTER
+      ps_debug_globals = globals;
+#endif
+    }
+
+    *aglobals = globals;
+    return error;
+  }
+
+
+  FT_LOCAL_DEF( FT_Error )
+  psh_globals_set_scale( PSH_Globals  globals,
+                         FT_Fixed     x_scale,
+                         FT_Fixed     y_scale,
+                         FT_Fixed     x_delta,
+                         FT_Fixed     y_delta )
+  {
+    PSH_Dimension  dim = &globals->dimension[0];
+
+
+    dim = &globals->dimension[0];
+    if ( x_scale != dim->scale_mult  ||
+         x_delta != dim->scale_delta )
+    {
+      dim->scale_mult  = x_scale;
+      dim->scale_delta = x_delta;
+
+      psh_globals_scale_widths( globals, 0 );
+    }
+
+    dim = &globals->dimension[1];
+    if ( y_scale != dim->scale_mult  ||
+         y_delta != dim->scale_delta )
+    {
+      dim->scale_mult  = y_scale;
+      dim->scale_delta = y_delta;
+
+      psh_globals_scale_widths( globals, 1 );
+      psh_blues_scale_zones( &globals->blues, y_scale, y_delta );
+    }
+
+    return 0;
+  }
+
+
+  FT_LOCAL_DEF( void )
+  psh_globals_funcs_init( PSH_Globals_FuncsRec*  funcs )
+  {
+    funcs->create    = psh_globals_new;
+    funcs->set_scale = psh_globals_set_scale;
+    funcs->destroy   = psh_globals_destroy;
+  }
+
+
+/* END */
diff --git a/src/pshinter/pshglob.h b/src/pshinter/pshglob.h
new file mode 100644
index 0000000..c511626
--- /dev/null
+++ b/src/pshinter/pshglob.h
@@ -0,0 +1,196 @@
+/***************************************************************************/
+/*                                                                         */
+/*  pshglob.h                                                              */
+/*                                                                         */
+/*    PostScript hinter global hinting management.                         */
+/*                                                                         */
+/*  Copyright 2001, 2002, 2003 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 __PSHGLOB_H__
+#define __PSHGLOB_H__
+
+
+#include FT_FREETYPE_H
+#include FT_INTERNAL_POSTSCRIPT_HINTS_H
+
+
+FT_BEGIN_HEADER
+
+
+  /*************************************************************************/
+  /*************************************************************************/
+  /*****                                                               *****/
+  /*****                    GLOBAL HINTS INTERNALS                     *****/
+  /*****                                                               *****/
+  /*************************************************************************/
+  /*************************************************************************/
+
+
+  /*************************************************************************/
+  /*                                                                       */
+  /* @constant:                                                            */
+  /*    PS_GLOBALS_MAX_BLUE_ZONES                                          */
+  /*                                                                       */
+  /* @description:                                                         */
+  /*    The maximum number of blue zones in a font global hints structure. */
+  /*    See @PS_Globals_BluesRec.                                          */
+  /*                                                                       */
+#define PS_GLOBALS_MAX_BLUE_ZONES  16
+
+
+  /*************************************************************************/
+  /*                                                                       */
+  /* @constant:                                                            */
+  /*    PS_GLOBALS_MAX_STD_WIDTHS                                          */
+  /*                                                                       */
+  /* @description:                                                         */
+  /*    The maximum number of standard and snap widths in either the       */
+  /*    horizontal or vertical direction.  See @PS_Globals_WidthsRec.      */
+  /*                                                                       */
+#define PS_GLOBALS_MAX_STD_WIDTHS  16
+
+
+  /* standard and snap width */
+  typedef struct  PSH_WidthRec_
+  {
+    FT_Int  org;
+    FT_Pos  cur;
+    FT_Pos  fit;
+
+  } PSH_WidthRec, *PSH_Width;
+
+
+  /* standard and snap widths table */
+  typedef struct  PSH_WidthsRec_
+  {
+    FT_UInt       count;
+    PSH_WidthRec  widths[PS_GLOBALS_MAX_STD_WIDTHS];
+
+  } PSH_WidthsRec, *PSH_Widths;
+
+
+  typedef struct  PSH_DimensionRec_
+  {
+    PSH_WidthsRec  stdw;
+    FT_Fixed       scale_mult;
+    FT_Fixed       scale_delta;
+
+  } PSH_DimensionRec, *PSH_Dimension;
+
+
+  /* blue zone descriptor */
+  typedef struct  PSH_Blue_ZoneRec_
+  {
+    FT_Int  org_ref;
+    FT_Int  org_delta;
+    FT_Int  org_top;
+    FT_Int  org_bottom;
+
+    FT_Pos  cur_ref;
+    FT_Pos  cur_delta;
+    FT_Pos  cur_bottom;
+    FT_Pos  cur_top;
+
+  } PSH_Blue_ZoneRec, *PSH_Blue_Zone;
+
+
+  typedef struct  PSH_Blue_TableRec_
+  {
+    FT_UInt           count;
+    PSH_Blue_ZoneRec  zones[PS_GLOBALS_MAX_BLUE_ZONES];
+
+  } PSH_Blue_TableRec, *PSH_Blue_Table;
+
+
+  /* blue zones table */
+  typedef struct  PSH_BluesRec_
+  {
+    PSH_Blue_TableRec  normal_top;
+    PSH_Blue_TableRec  normal_bottom;
+    PSH_Blue_TableRec  family_top;
+    PSH_Blue_TableRec  family_bottom;
+
+    FT_Fixed           blue_scale;
+    FT_Int             blue_shift;
+    FT_Int             blue_threshold;
+    FT_Int             blue_fuzz;
+    FT_Bool            no_overshoots;
+
+  } PSH_BluesRec, *PSH_Blues;
+
+
+  /* font globals.                                         */
+  /* dimension 0 => X coordinates + vertical hints/stems   */
+  /* dimension 1 => Y coordinates + horizontal hints/stems */
+  typedef struct  PSH_GlobalsRec_
+  {
+    FT_Memory         memory;
+    PSH_DimensionRec  dimension[2];
+    PSH_BluesRec      blues;
+
+  } PSH_GlobalsRec;
+
+
+#define PSH_BLUE_ALIGN_NONE  0
+#define PSH_BLUE_ALIGN_TOP   1
+#define PSH_BLUE_ALIGN_BOT   2
+
+
+  typedef struct  PSH_AlignmentRec_
+  {
+    int     align;
+    FT_Pos  align_top;
+    FT_Pos  align_bot;
+
+  } PSH_AlignmentRec, *PSH_Alignment;
+
+
+  FT_LOCAL( void )
+  psh_globals_funcs_init( PSH_Globals_FuncsRec*  funcs );
+
+
+#if 0
+  /* snap a stem width to fitter coordinates.  `org_width' is in font */
+  /* units.  The result is in device pixels (26.6 format).            */
+  FT_LOCAL( FT_Pos )
+  psh_dimension_snap_width( PSH_Dimension  dimension,
+                            FT_Int         org_width );
+#endif
+
+  FT_LOCAL( FT_Error )
+  psh_globals_set_scale( PSH_Globals  globals,
+                         FT_Fixed     x_scale,
+                         FT_Fixed     y_scale,
+                         FT_Fixed     x_delta,
+                         FT_Fixed     y_delta );
+
+  /* snap a stem to one or two blue zones */
+  FT_LOCAL( void )
+  psh_blues_snap_stem( PSH_Blues      blues,
+                       FT_Int         stem_top,
+                       FT_Int         stem_bot,
+                       PSH_Alignment  alignment );
+  /* */
+
+#ifdef DEBUG_HINTER
+  extern PSH_Globals  ps_debug_globals;
+#endif
+
+
+FT_END_HEADER
+
+
+#endif /* __PSHGLOB_H__ */
+
+
+/* END */
diff --git a/src/pshinter/pshinter.c b/src/pshinter/pshinter.c
new file mode 100644
index 0000000..8e3f193
--- /dev/null
+++ b/src/pshinter/pshinter.c
@@ -0,0 +1,28 @@
+/***************************************************************************/
+/*                                                                         */
+/*  pshinter.c                                                             */
+/*                                                                         */
+/*    FreeType PostScript Hinting module                                   */
+/*                                                                         */
+/*  Copyright 2001, 2003 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.                                        */
+/*                                                                         */
+/***************************************************************************/
+
+
+#define FT_MAKE_OPTION_SINGLE_OBJECT
+
+#include <ft2build.h>
+#include "pshrec.c"
+#include "pshglob.c"
+#include "pshalgo.c"
+#include "pshmod.c"
+
+
+/* END */
diff --git a/src/pshinter/pshmod.c b/src/pshinter/pshmod.c
new file mode 100644
index 0000000..4eb3d91
--- /dev/null
+++ b/src/pshinter/pshmod.c
@@ -0,0 +1,121 @@
+/***************************************************************************/
+/*                                                                         */
+/*  pshmod.c                                                               */
+/*                                                                         */
+/*    FreeType PostScript hinter module implementation (body).             */
+/*                                                                         */
+/*  Copyright 2001, 2002, 2007 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.                                        */
+/*                                                                         */
+/***************************************************************************/
+
+
+#include <ft2build.h>
+#include FT_INTERNAL_OBJECTS_H
+#include "pshrec.h"
+#include "pshalgo.h"
+
+
+  /* the Postscript Hinter module structure */
+  typedef struct  PS_Hinter_Module_Rec_
+  {
+    FT_ModuleRec          root;
+    PS_HintsRec           ps_hints;
+
+    PSH_Globals_FuncsRec  globals_funcs;
+    T1_Hints_FuncsRec     t1_funcs;
+    T2_Hints_FuncsRec     t2_funcs;
+
+  } PS_Hinter_ModuleRec, *PS_Hinter_Module;
+
+
+  /* finalize module */
+  FT_CALLBACK_DEF( void )
+  ps_hinter_done( PS_Hinter_Module  module )
+  {
+    module->t1_funcs.hints = NULL;
+    module->t2_funcs.hints = NULL;
+
+    ps_hints_done( &module->ps_hints );
+  }
+
+
+  /* initialize module, create hints recorder and the interface */
+  FT_CALLBACK_DEF( FT_Error )
+  ps_hinter_init( PS_Hinter_Module  module )
+  {
+    FT_Memory  memory = module->root.memory;
+    void*      ph     = &module->ps_hints;
+
+
+    ps_hints_init( &module->ps_hints, memory );
+
+    psh_globals_funcs_init( &module->globals_funcs );
+
+    t1_hints_funcs_init( &module->t1_funcs );
+    module->t1_funcs.hints = (T1_Hints)ph;
+
+    t2_hints_funcs_init( &module->t2_funcs );
+    module->t2_funcs.hints = (T2_Hints)ph;
+
+    return 0;
+  }
+
+
+  /* returns global hints interface */
+  FT_CALLBACK_DEF( PSH_Globals_Funcs )
+  pshinter_get_globals_funcs( FT_Module  module )
+  {
+    return &((PS_Hinter_Module)module)->globals_funcs;
+  }
+
+
+  /* return Type 1 hints interface */
+  FT_CALLBACK_DEF( T1_Hints_Funcs )
+  pshinter_get_t1_funcs( FT_Module  module )
+  {
+    return &((PS_Hinter_Module)module)->t1_funcs;
+  }
+
+
+  /* return Type 2 hints interface */
+  FT_CALLBACK_DEF( T2_Hints_Funcs )
+  pshinter_get_t2_funcs( FT_Module  module )
+  {
+    return &((PS_Hinter_Module)module)->t2_funcs;
+  }
+
+
+  static
+  const PSHinter_Interface  pshinter_interface =
+  {
+    pshinter_get_globals_funcs,
+    pshinter_get_t1_funcs,
+    pshinter_get_t2_funcs
+  };
+
+
+  FT_CALLBACK_TABLE_DEF
+  const FT_Module_Class  pshinter_module_class =
+  {
+    0,
+    sizeof ( PS_Hinter_ModuleRec ),
+    "pshinter",
+    0x10000L,
+    0x20000L,
+
+    &pshinter_interface,            /* module-specific interface */
+
+    (FT_Module_Constructor)ps_hinter_init,
+    (FT_Module_Destructor) ps_hinter_done,
+    (FT_Module_Requester)  0        /* no additional interface for now */
+  };
+
+
+/* END */
diff --git a/src/pshinter/pshmod.h b/src/pshinter/pshmod.h
new file mode 100644
index 0000000..1a91025
--- /dev/null
+++ b/src/pshinter/pshmod.h
@@ -0,0 +1,39 @@
+/***************************************************************************/
+/*                                                                         */
+/*  pshmod.h                                                               */
+/*                                                                         */
+/*    PostScript hinter module interface (specification).                  */
+/*                                                                         */
+/*  Copyright 2001 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 __PSHMOD_H__
+#define __PSHMOD_H__
+
+
+#include <ft2build.h>
+#include FT_MODULE_H
+
+
+FT_BEGIN_HEADER
+
+
+  FT_EXPORT_VAR( const FT_Module_Class )  pshinter_module_class;
+
+
+FT_END_HEADER
+
+
+#endif /* __PSHMOD_H__ */
+
+
+/* END */
diff --git a/src/pshinter/pshnterr.h b/src/pshinter/pshnterr.h
new file mode 100644
index 0000000..3c0029f
--- /dev/null
+++ b/src/pshinter/pshnterr.h
@@ -0,0 +1,40 @@
+/***************************************************************************/
+/*                                                                         */
+/*  pshnterr.h                                                             */
+/*                                                                         */
+/*    PS Hinter error codes (specification only).                          */
+/*                                                                         */
+/*  Copyright 2003 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 PSHinter error enumeration constants. */
+  /*                                                                       */
+  /*************************************************************************/
+
+#ifndef __PSHNTERR_H__
+#define __PSHNTERR_H__
+
+#include FT_MODULE_ERRORS_H
+
+#undef __FTERRORS_H__
+
+#define FT_ERR_PREFIX  PSH_Err_
+#define FT_ERR_BASE    FT_Mod_Err_PShinter
+
+#include FT_ERRORS_H
+
+#endif /* __PSHNTERR_H__ */
+
+
+/* END */
diff --git a/src/pshinter/pshrec.c b/src/pshinter/pshrec.c
new file mode 100644
index 0000000..2a885ef
--- /dev/null
+++ b/src/pshinter/pshrec.c
@@ -0,0 +1,1215 @@
+/***************************************************************************/
+/*                                                                         */
+/*  pshrec.c                                                               */
+/*                                                                         */
+/*    FreeType PostScript hints recorder (body).                           */
+/*                                                                         */
+/*  Copyright 2001, 2002, 2003, 2004, 2007 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.                                        */
+/*                                                                         */
+/***************************************************************************/
+
+
+#include <ft2build.h>
+#include FT_FREETYPE_H
+#include FT_INTERNAL_OBJECTS_H
+#include FT_INTERNAL_DEBUG_H
+#include "pshrec.h"
+#include "pshalgo.h"
+
+#include "pshnterr.h"
+
+#undef  FT_COMPONENT
+#define FT_COMPONENT  trace_pshrec
+
+#ifdef DEBUG_HINTER
+  PS_Hints  ps_debug_hints         = 0;
+  int       ps_debug_no_horz_hints = 0;
+  int       ps_debug_no_vert_hints = 0;
+#endif
+
+
+  /*************************************************************************/
+  /*************************************************************************/
+  /*****                                                               *****/
+  /*****                      PS_HINT MANAGEMENT                       *****/
+  /*****                                                               *****/
+  /*************************************************************************/
+  /*************************************************************************/
+
+  /* destroy hints table */
+  static void
+  ps_hint_table_done( PS_Hint_Table  table,
+                      FT_Memory      memory )
+  {
+    FT_FREE( table->hints );
+    table->num_hints = 0;
+    table->max_hints = 0;
+  }
+
+
+  /* ensure that a table can contain "count" elements */
+  static FT_Error
+  ps_hint_table_ensure( PS_Hint_Table  table,
+                        FT_UInt        count,
+                        FT_Memory      memory )
+  {
+    FT_UInt   old_max = table->max_hints;
+    FT_UInt   new_max = count;
+    FT_Error  error   = 0;
+
+
+    if ( new_max > old_max )
+    {
+      /* try to grow the table */
+      new_max = FT_PAD_CEIL( new_max, 8 );
+      if ( !FT_RENEW_ARRAY( table->hints, old_max, new_max ) )
+        table->max_hints = new_max;
+    }
+    return error;
+  }
+
+
+  static FT_Error
+  ps_hint_table_alloc( PS_Hint_Table  table,
+                       FT_Memory      memory,
+                       PS_Hint       *ahint )
+  {
+    FT_Error  error = 0;
+    FT_UInt   count;
+    PS_Hint   hint = 0;
+
+
+    count = table->num_hints;
+    count++;
+
+    if ( count >= table->max_hints )
+    {
+      error = ps_hint_table_ensure( table, count, memory );
+      if ( error )
+        goto Exit;
+    }
+
+    hint        = table->hints + count - 1;
+    hint->pos   = 0;
+    hint->len   = 0;
+    hint->flags = 0;
+
+    table->num_hints = count;
+
+  Exit:
+    *ahint = hint;
+    return error;
+  }
+
+
+  /*************************************************************************/
+  /*************************************************************************/
+  /*****                                                               *****/
+  /*****                      PS_MASK MANAGEMENT                       *****/
+  /*****                                                               *****/
+  /*************************************************************************/
+  /*************************************************************************/
+
+  /* destroy mask */
+  static void
+  ps_mask_done( PS_Mask    mask,
+                FT_Memory  memory )
+  {
+    FT_FREE( mask->bytes );
+    mask->num_bits  = 0;
+    mask->max_bits  = 0;
+    mask->end_point = 0;
+  }
+
+
+  /* ensure that a mask can contain "count" bits */
+  static FT_Error
+  ps_mask_ensure( PS_Mask    mask,
+                  FT_UInt    count,
+                  FT_Memory  memory )
+  {
+    FT_UInt   old_max = ( mask->max_bits + 7 ) >> 3;
+    FT_UInt   new_max = ( count          + 7 ) >> 3;
+    FT_Error  error   = 0;
+
+
+    if ( new_max > old_max )
+    {
+      new_max = FT_PAD_CEIL( new_max, 8 );
+      if ( !FT_RENEW_ARRAY( mask->bytes, old_max, new_max ) )
+        mask->max_bits = new_max * 8;
+    }
+    return error;
+  }
+
+
+  /* test a bit value in a given mask */
+  static FT_Int
+  ps_mask_test_bit( PS_Mask  mask,
+                    FT_Int   idx )
+  {
+    if ( (FT_UInt)idx >= mask->num_bits )
+      return 0;
+
+    return mask->bytes[idx >> 3] & ( 0x80 >> ( idx & 7 ) );
+  }
+
+
+  /* clear a given bit */
+  static void
+  ps_mask_clear_bit( PS_Mask  mask,
+                     FT_Int   idx )
+  {
+    FT_Byte*  p;
+
+
+    if ( (FT_UInt)idx >= mask->num_bits )
+      return;
+
+    p    = mask->bytes + ( idx >> 3 );
+    p[0] = (FT_Byte)( p[0] & ~( 0x80 >> ( idx & 7 ) ) );
+  }
+
+
+  /* set a given bit, possibly grow the mask */
+  static FT_Error
+  ps_mask_set_bit( PS_Mask    mask,
+                   FT_Int     idx,
+                   FT_Memory  memory )
+  {
+    FT_Error  error = 0;
+    FT_Byte*  p;
+
+
+    if ( idx < 0 )
+      goto Exit;
+
+    if ( (FT_UInt)idx >= mask->num_bits )
+    {
+      error = ps_mask_ensure( mask, idx + 1, memory );
+      if ( error )
+        goto Exit;
+
+      mask->num_bits = idx + 1;
+    }
+
+    p    = mask->bytes + ( idx >> 3 );
+    p[0] = (FT_Byte)( p[0] | ( 0x80 >> ( idx & 7 ) ) );
+
+  Exit:
+    return error;
+  }
+
+
+  /* destroy mask table */
+  static void
+  ps_mask_table_done( PS_Mask_Table  table,
+                      FT_Memory      memory )
+  {
+    FT_UInt  count = table->max_masks;
+    PS_Mask  mask  = table->masks;
+
+
+    for ( ; count > 0; count--, mask++ )
+      ps_mask_done( mask, memory );
+
+    FT_FREE( table->masks );
+    table->num_masks = 0;
+    table->max_masks = 0;
+  }
+
+
+  /* ensure that a mask table can contain "count" masks */
+  static FT_Error
+  ps_mask_table_ensure( PS_Mask_Table  table,
+                        FT_UInt        count,
+                        FT_Memory      memory )
+  {
+    FT_UInt   old_max = table->max_masks;
+    FT_UInt   new_max = count;
+    FT_Error  error   = 0;
+
+
+    if ( new_max > old_max )
+    {
+      new_max = FT_PAD_CEIL( new_max, 8 );
+      if ( !FT_RENEW_ARRAY( table->masks, old_max, new_max ) )
+        table->max_masks = new_max;
+    }
+    return error;
+  }
+
+
+  /* allocate a new mask in a table */
+  static FT_Error
+  ps_mask_table_alloc( PS_Mask_Table  table,
+                       FT_Memory      memory,
+                       PS_Mask       *amask )
+  {
+    FT_UInt   count;
+    FT_Error  error = 0;
+    PS_Mask   mask  = 0;
+
+
+    count = table->num_masks;
+    count++;
+
+    if ( count > table->max_masks )
+    {
+      error = ps_mask_table_ensure( table, count, memory );
+      if ( error )
+        goto Exit;
+    }
+
+    mask             = table->masks + count - 1;
+    mask->num_bits   = 0;
+    mask->end_point  = 0;
+    table->num_masks = count;
+
+  Exit:
+    *amask = mask;
+    return error;
+  }
+
+
+  /* return last hint mask in a table, create one if the table is empty */
+  static FT_Error
+  ps_mask_table_last( PS_Mask_Table  table,
+                      FT_Memory      memory,
+                      PS_Mask       *amask )
+  {
+    FT_Error  error = 0;
+    FT_UInt   count;
+    PS_Mask   mask;
+
+
+    count = table->num_masks;
+    if ( count == 0 )
+    {
+      error = ps_mask_table_alloc( table, memory, &mask );
+      if ( error )
+        goto Exit;
+    }
+    else
+      mask = table->masks + count - 1;
+
+  Exit:
+    *amask = mask;
+    return error;
+  }
+
+
+  /* set a new mask to a given bit range */
+  static FT_Error
+  ps_mask_table_set_bits( PS_Mask_Table   table,
+                          const FT_Byte*  source,
+                          FT_UInt         bit_pos,
+                          FT_UInt         bit_count,
+                          FT_Memory       memory )
+  {
+    FT_Error  error = 0;
+    PS_Mask   mask;
+
+
+    error = ps_mask_table_last( table, memory, &mask );
+    if ( error )
+      goto Exit;
+
+    error = ps_mask_ensure( mask, bit_count, memory );
+    if ( error )
+      goto Exit;
+
+    mask->num_bits = bit_count;
+
+    /* now, copy bits */
+    {
+      FT_Byte*  read  = (FT_Byte*)source + ( bit_pos >> 3 );
+      FT_Int    rmask = 0x80 >> ( bit_pos & 7 );
+      FT_Byte*  write = mask->bytes;
+      FT_Int    wmask = 0x80;
+      FT_Int    val;
+
+
+      for ( ; bit_count > 0; bit_count-- )
+      {
+        val = write[0] & ~wmask;
+
+        if ( read[0] & rmask )
+          val |= wmask;
+
+        write[0] = (FT_Byte)val;
+
+        rmask >>= 1;
+        if ( rmask == 0 )
+        {
+          read++;
+          rmask = 0x80;
+        }
+
+        wmask >>= 1;
+        if ( wmask == 0 )
+        {
+          write++;
+          wmask = 0x80;
+        }
+      }
+    }
+
+  Exit:
+    return error;
+  }
+
+
+  /* test whether two masks in a table intersect */
+  static FT_Int
+  ps_mask_table_test_intersect( PS_Mask_Table  table,
+                                FT_Int         index1,
+                                FT_Int         index2 )
+  {
+    PS_Mask   mask1  = table->masks + index1;
+    PS_Mask   mask2  = table->masks + index2;
+    FT_Byte*  p1     = mask1->bytes;
+    FT_Byte*  p2     = mask2->bytes;
+    FT_UInt   count1 = mask1->num_bits;
+    FT_UInt   count2 = mask2->num_bits;
+    FT_UInt   count;
+
+
+    count = ( count1 <= count2 ) ? count1 : count2;
+    for ( ; count >= 8; count -= 8 )
+    {
+      if ( p1[0] & p2[0] )
+        return 1;
+
+      p1++;
+      p2++;
+    }
+
+    if ( count == 0 )
+      return 0;
+
+    return ( p1[0] & p2[0] ) & ~( 0xFF >> count );
+  }
+
+
+  /* merge two masks, used by ps_mask_table_merge_all */
+  static FT_Error
+  ps_mask_table_merge( PS_Mask_Table  table,
+                       FT_Int         index1,
+                       FT_Int         index2,
+                       FT_Memory      memory )
+  {
+    FT_UInt   temp;
+    FT_Error  error = 0;
+
+
+    /* swap index1 and index2 so that index1 < index2 */
+    if ( index1 > index2 )
+    {
+      temp   = index1;
+      index1 = index2;
+      index2 = temp;
+    }
+
+    if ( index1 < index2 && index1 >= 0 && index2 < (FT_Int)table->num_masks )
+    {
+      /* we need to merge the bitsets of index1 and index2 with a */
+      /* simple union                                             */
+      PS_Mask  mask1  = table->masks + index1;
+      PS_Mask  mask2  = table->masks + index2;
+      FT_UInt  count1 = mask1->num_bits;
+      FT_UInt  count2 = mask2->num_bits;
+      FT_Int   delta;
+
+
+      if ( count2 > 0 )
+      {
+        FT_UInt   pos;
+        FT_Byte*  read;
+        FT_Byte*  write;
+
+
+        /* if "count2" is greater than "count1", we need to grow the */
+        /* first bitset, and clear the highest bits                  */
+        if ( count2 > count1 )
+        {
+          error = ps_mask_ensure( mask1, count2, memory );
+          if ( error )
+            goto Exit;
+
+          for ( pos = count1; pos < count2; pos++ )
+            ps_mask_clear_bit( mask1, pos );
+        }
+
+        /* merge (unite) the bitsets */
+        read  = mask2->bytes;
+        write = mask1->bytes;
+        pos   = (FT_UInt)( ( count2 + 7 ) >> 3 );
+
+        for ( ; pos > 0; pos-- )
+        {
+          write[0] = (FT_Byte)( write[0] | read[0] );
+          write++;
+          read++;
+        }
+      }
+
+      /* Now, remove "mask2" from the list.  We need to keep the masks */
+      /* sorted in order of importance, so move table elements.        */
+      mask2->num_bits  = 0;
+      mask2->end_point = 0;
+
+      delta = table->num_masks - 1 - index2; /* number of masks to move */
+      if ( delta > 0 )
+      {
+        /* move to end of table for reuse */
+        PS_MaskRec  dummy = *mask2;
+
+
+        ft_memmove( mask2, mask2 + 1, delta * sizeof ( PS_MaskRec ) );
+
+        mask2[delta] = dummy;
+      }
+
+      table->num_masks--;
+    }
+    else
+      FT_ERROR(( "ps_mask_table_merge: ignoring invalid indices (%d,%d)\n",
+                 index1, index2 ));
+
+  Exit:
+    return error;
+  }
+
+
+  /* Try to merge all masks in a given table.  This is used to merge */
+  /* all counter masks into independent counter "paths".             */
+  /*                                                                 */
+  static FT_Error
+  ps_mask_table_merge_all( PS_Mask_Table  table,
+                           FT_Memory      memory )
+  {
+    FT_Int    index1, index2;
+    FT_Error  error = 0;
+
+
+    for ( index1 = table->num_masks - 1; index1 > 0; index1-- )
+    {
+      for ( index2 = index1 - 1; index2 >= 0; index2-- )
+      {
+        if ( ps_mask_table_test_intersect( table, index1, index2 ) )
+        {
+          error = ps_mask_table_merge( table, index2, index1, memory );
+          if ( error )
+            goto Exit;
+
+          break;
+        }
+      }
+    }
+
+  Exit:
+    return error;
+  }
+
+
+  /*************************************************************************/
+  /*************************************************************************/
+  /*****                                                               *****/
+  /*****                    PS_DIMENSION MANAGEMENT                    *****/
+  /*****                                                               *****/
+  /*************************************************************************/
+  /*************************************************************************/
+
+
+  /* finalize a given dimension */
+  static void
+  ps_dimension_done( PS_Dimension  dimension,
+                     FT_Memory     memory )
+  {
+    ps_mask_table_done( &dimension->counters, memory );
+    ps_mask_table_done( &dimension->masks,    memory );
+    ps_hint_table_done( &dimension->hints,    memory );
+  }
+
+
+  /* initialize a given dimension */
+  static void
+  ps_dimension_init( PS_Dimension  dimension )
+  {
+    dimension->hints.num_hints    = 0;
+    dimension->masks.num_masks    = 0;
+    dimension->counters.num_masks = 0;
+  }
+
+
+#if 0
+
+  /* set a bit at a given index in the current hint mask */
+  static FT_Error
+  ps_dimension_set_mask_bit( PS_Dimension  dim,
+                             FT_UInt       idx,
+                             FT_Memory     memory )
+  {
+    PS_Mask  mask;
+    FT_Error  error = 0;
+
+
+    /* get last hint mask */
+    error = ps_mask_table_last( &dim->masks, memory, &mask );
+    if ( error )
+      goto Exit;
+
+    error = ps_mask_set_bit( mask, idx, memory );
+
+  Exit:
+    return error;
+  }
+
+#endif
+
+  /* set the end point in a mask, called from "End" & "Reset" methods */
+  static void
+  ps_dimension_end_mask( PS_Dimension  dim,
+                         FT_UInt       end_point )
+  {
+    FT_UInt  count = dim->masks.num_masks;
+    PS_Mask  mask;
+
+
+    if ( count > 0 )
+    {
+      mask            = dim->masks.masks + count - 1;
+      mask->end_point = end_point;
+    }
+  }
+
+
+  /* set the end point in the current mask, then create a new empty one */
+  /* (called by "Reset" method)                                         */
+  static FT_Error
+  ps_dimension_reset_mask( PS_Dimension  dim,
+                           FT_UInt       end_point,
+                           FT_Memory     memory )
+  {
+    PS_Mask  mask;
+
+
+    /* end current mask */
+    ps_dimension_end_mask( dim, end_point );
+
+    /* allocate new one */
+    return ps_mask_table_alloc( &dim->masks, memory, &mask );
+  }
+
+
+  /* set a new mask, called from the "T2Stem" method */
+  static FT_Error
+  ps_dimension_set_mask_bits( PS_Dimension    dim,
+                              const FT_Byte*  source,
+                              FT_UInt         source_pos,
+                              FT_UInt         source_bits,
+                              FT_UInt         end_point,
+                              FT_Memory       memory )
+  {
+    FT_Error  error = 0;
+
+
+    /* reset current mask, if any */
+    error = ps_dimension_reset_mask( dim, end_point, memory );
+    if ( error )
+      goto Exit;
+
+    /* set bits in new mask */
+    error = ps_mask_table_set_bits( &dim->masks, source,
+                                    source_pos, source_bits, memory );
+
+  Exit:
+    return error;
+  }
+
+
+  /* add a new single stem (called from "T1Stem" method) */
+  static FT_Error
+  ps_dimension_add_t1stem( PS_Dimension  dim,
+                           FT_Int        pos,
+                           FT_Int        len,
+                           FT_Memory     memory,
+                           FT_Int       *aindex )
+  {
+    FT_Error  error = 0;
+    FT_UInt   flags = 0;
+
+
+    /* detect ghost stem */
+    if ( len < 0 )
+    {
+      flags |= PS_HINT_FLAG_GHOST;
+      if ( len == -21 )
+      {
+        flags |= PS_HINT_FLAG_BOTTOM;
+        pos   += len;
+      }
+      len = 0;
+    }
+
+    if ( aindex )
+      *aindex = -1;
+
+    /* now, lookup stem in the current hints table */
+    {
+      PS_Mask  mask;
+      FT_UInt  idx;
+      FT_UInt  max   = dim->hints.num_hints;
+      PS_Hint  hint  = dim->hints.hints;
+
+
+      for ( idx = 0; idx < max; idx++, hint++ )
+      {
+        if ( hint->pos == pos && hint->len == len )
+          break;
+      }
+
+      /* we need to create a new hint in the table */
+      if ( idx >= max )
+      {
+        error = ps_hint_table_alloc( &dim->hints, memory, &hint );
+        if ( error )
+          goto Exit;
+
+        hint->pos   = pos;
+        hint->len   = len;
+        hint->flags = flags;
+      }
+
+      /* now, store the hint in the current mask */
+      error = ps_mask_table_last( &dim->masks, memory, &mask );
+      if ( error )
+        goto Exit;
+
+      error = ps_mask_set_bit( mask, idx, memory );
+      if ( error )
+        goto Exit;
+
+      if ( aindex )
+        *aindex = (FT_Int)idx;
+    }
+
+  Exit:
+    return error;
+  }
+
+
+  /* add a "hstem3/vstem3" counter to our dimension table */
+  static FT_Error
+  ps_dimension_add_counter( PS_Dimension  dim,
+                            FT_Int        hint1,
+                            FT_Int        hint2,
+                            FT_Int        hint3,
+                            FT_Memory     memory )
+  {
+    FT_Error  error   = 0;
+    FT_UInt   count   = dim->counters.num_masks;
+    PS_Mask   counter = dim->counters.masks;
+
+
+    /* try to find an existing counter mask that already uses */
+    /* one of these stems here                                */
+    for ( ; count > 0; count--, counter++ )
+    {
+      if ( ps_mask_test_bit( counter, hint1 ) ||
+           ps_mask_test_bit( counter, hint2 ) ||
+           ps_mask_test_bit( counter, hint3 ) )
+        break;
+    }
+
+    /* create a new counter when needed */
+    if ( count == 0 )
+    {
+      error = ps_mask_table_alloc( &dim->counters, memory, &counter );
+      if ( error )
+        goto Exit;
+    }
+
+    /* now, set the bits for our hints in the counter mask */
+    error = ps_mask_set_bit( counter, hint1, memory );
+    if ( error )
+      goto Exit;
+
+    error = ps_mask_set_bit( counter, hint2, memory );
+    if ( error )
+      goto Exit;
+
+    error = ps_mask_set_bit( counter, hint3, memory );
+    if ( error )
+      goto Exit;
+
+  Exit:
+    return error;
+  }
+
+
+  /* end of recording session for a given dimension */
+  static FT_Error
+  ps_dimension_end( PS_Dimension  dim,
+                    FT_UInt       end_point,
+                    FT_Memory     memory )
+  {
+    /* end hint mask table */
+    ps_dimension_end_mask( dim, end_point );
+
+    /* merge all counter masks into independent "paths" */
+    return ps_mask_table_merge_all( &dim->counters, memory );
+  }
+
+
+  /*************************************************************************/
+  /*************************************************************************/
+  /*****                                                               *****/
+  /*****                    PS_RECORDER MANAGEMENT                     *****/
+  /*****                                                               *****/
+  /*************************************************************************/
+  /*************************************************************************/
+
+
+  /* destroy hints */
+  FT_LOCAL( void )
+  ps_hints_done( PS_Hints  hints )
+  {
+    FT_Memory  memory = hints->memory;
+
+
+    ps_dimension_done( &hints->dimension[0], memory );
+    ps_dimension_done( &hints->dimension[1], memory );
+
+    hints->error  = 0;
+    hints->memory = 0;
+  }
+
+
+  FT_LOCAL( FT_Error )
+  ps_hints_init( PS_Hints   hints,
+                 FT_Memory  memory )
+  {
+    FT_MEM_ZERO( hints, sizeof ( *hints ) );
+    hints->memory = memory;
+    return 0;
+  }
+
+
+  /* initialize a hints for a new session */
+  static void
+  ps_hints_open( PS_Hints      hints,
+                 PS_Hint_Type  hint_type )
+  {
+    switch ( hint_type )
+    {
+    case PS_HINT_TYPE_1:
+    case PS_HINT_TYPE_2:
+      hints->error     = 0;
+      hints->hint_type = hint_type;
+
+      ps_dimension_init( &hints->dimension[0] );
+      ps_dimension_init( &hints->dimension[1] );
+      break;
+
+    default:
+      hints->error     = PSH_Err_Invalid_Argument;
+      hints->hint_type = hint_type;
+
+      FT_ERROR(( "ps_hints_open: invalid charstring type!\n" ));
+      break;
+    }
+  }
+
+
+  /* add one or more stems to the current hints table */
+  static void
+  ps_hints_stem( PS_Hints  hints,
+                 FT_Int    dimension,
+                 FT_UInt   count,
+                 FT_Long*  stems )
+  {
+    if ( !hints->error )
+    {
+      /* limit "dimension" to 0..1 */
+      if ( dimension < 0 || dimension > 1 )
+      {
+        FT_ERROR(( "ps_hints_stem: invalid dimension (%d) used\n",
+                   dimension ));
+        dimension = ( dimension != 0 );
+      }
+
+      /* record the stems in the current hints/masks table */
+      switch ( hints->hint_type )
+      {
+      case PS_HINT_TYPE_1:  /* Type 1 "hstem" or "vstem" operator */
+      case PS_HINT_TYPE_2:  /* Type 2 "hstem" or "vstem" operator */
+        {
+          PS_Dimension  dim = &hints->dimension[dimension];
+
+
+          for ( ; count > 0; count--, stems += 2 )
+          {
+            FT_Error   error;
+            FT_Memory  memory = hints->memory;
+
+
+            error = ps_dimension_add_t1stem(
+                      dim, (FT_Int)stems[0], (FT_Int)stems[1],
+                      memory, NULL );
+            if ( error )
+            {
+              FT_ERROR(( "ps_hints_stem: could not add stem"
+                         " (%d,%d) to hints table\n", stems[0], stems[1] ));
+
+              hints->error = error;
+              return;
+            }
+          }
+          break;
+        }
+
+      default:
+        FT_ERROR(( "ps_hints_stem: called with invalid hint type (%d)\n",
+                   hints->hint_type ));
+        break;
+      }
+    }
+  }
+
+
+  /* add one Type1 counter stem to the current hints table */
+  static void
+  ps_hints_t1stem3( PS_Hints  hints,
+                    FT_Int    dimension,
+                    FT_Long*  stems )
+  {
+    FT_Error  error = 0;
+
+
+    if ( !hints->error )
+    {
+      PS_Dimension  dim;
+      FT_Memory     memory = hints->memory;
+      FT_Int        count;
+      FT_Int        idx[3];
+
+
+      /* limit "dimension" to 0..1 */
+      if ( dimension < 0 || dimension > 1 )
+      {
+        FT_ERROR(( "ps_hints_t1stem3: invalid dimension (%d) used\n",
+                   dimension ));
+        dimension = ( dimension != 0 );
+      }
+
+      dim = &hints->dimension[dimension];
+
+      /* there must be 6 elements in the 'stem' array */
+      if ( hints->hint_type == PS_HINT_TYPE_1 )
+      {
+        /* add the three stems to our hints/masks table */
+        for ( count = 0; count < 3; count++, stems += 2 )
+        {
+          error = ps_dimension_add_t1stem(
+                    dim, (FT_Int)stems[0], (FT_Int)stems[1],
+                    memory, &idx[count] );
+          if ( error )
+            goto Fail;
+        }
+
+        /* now, add the hints to the counters table */
+        error = ps_dimension_add_counter( dim, idx[0], idx[1], idx[2],
+                                          memory );
+        if ( error )
+          goto Fail;
+      }
+      else
+      {
+        FT_ERROR(( "ps_hints_t1stem3: called with invalid hint type!\n" ));
+        error = PSH_Err_Invalid_Argument;
+        goto Fail;
+      }
+    }
+
+    return;
+
+  Fail:
+    FT_ERROR(( "ps_hints_t1stem3: could not add counter stems to table\n" ));
+    hints->error = error;
+  }
+
+
+  /* reset hints (only with Type 1 hints) */
+  static void
+  ps_hints_t1reset( PS_Hints  hints,
+                    FT_UInt   end_point )
+  {
+    FT_Error  error = 0;
+
+
+    if ( !hints->error )
+    {
+      FT_Memory  memory = hints->memory;
+
+
+      if ( hints->hint_type == PS_HINT_TYPE_1 )
+      {
+        error = ps_dimension_reset_mask( &hints->dimension[0],
+                                         end_point, memory );
+        if ( error )
+          goto Fail;
+
+        error = ps_dimension_reset_mask( &hints->dimension[1],
+                                         end_point, memory );
+        if ( error )
+          goto Fail;
+      }
+      else
+      {
+        /* invalid hint type */
+        error = PSH_Err_Invalid_Argument;
+        goto Fail;
+      }
+    }
+    return;
+
+  Fail:
+    hints->error = error;
+  }
+
+
+  /* Type2 "hintmask" operator, add a new hintmask to each direction */
+  static void
+  ps_hints_t2mask( PS_Hints        hints,
+                   FT_UInt         end_point,
+                   FT_UInt         bit_count,
+                   const FT_Byte*  bytes )
+  {
+    FT_Error  error;
+
+
+    if ( !hints->error )
+    {
+      PS_Dimension  dim    = hints->dimension;
+      FT_Memory     memory = hints->memory;
+      FT_UInt       count1 = dim[0].hints.num_hints;
+      FT_UInt       count2 = dim[1].hints.num_hints;
+
+
+      /* check bit count; must be equal to current total hint count */
+      if ( bit_count !=  count1 + count2 )
+      {
+        FT_ERROR(( "ps_hints_t2mask: "
+                   "called with invalid bitcount %d (instead of %d)\n",
+                   bit_count, count1 + count2 ));
+
+        /* simply ignore the operator */
+        return;
+      }
+
+      /* set-up new horizontal and vertical hint mask now */
+      error = ps_dimension_set_mask_bits( &dim[0], bytes, count2, count1,
+                                          end_point, memory );
+      if ( error )
+        goto Fail;
+
+      error = ps_dimension_set_mask_bits( &dim[1], bytes, 0, count2,
+                                          end_point, memory );
+      if ( error )
+        goto Fail;
+    }
+    return;
+
+  Fail:
+    hints->error = error;
+  }
+
+
+  static void
+  ps_hints_t2counter( PS_Hints        hints,
+                      FT_UInt         bit_count,
+                      const FT_Byte*  bytes )
+  {
+    FT_Error  error;
+
+
+    if ( !hints->error )
+    {
+      PS_Dimension  dim    = hints->dimension;
+      FT_Memory     memory = hints->memory;
+      FT_UInt       count1 = dim[0].hints.num_hints;
+      FT_UInt       count2 = dim[1].hints.num_hints;
+
+
+      /* check bit count, must be equal to current total hint count */
+      if ( bit_count !=  count1 + count2 )
+      {
+        FT_ERROR(( "ps_hints_t2counter: "
+                   "called with invalid bitcount %d (instead of %d)\n",
+                   bit_count, count1 + count2 ));
+
+        /* simply ignore the operator */
+        return;
+      }
+
+      /* set-up new horizontal and vertical hint mask now */
+      error = ps_dimension_set_mask_bits( &dim[0], bytes, 0, count1,
+                                          0, memory );
+      if ( error )
+        goto Fail;
+
+      error = ps_dimension_set_mask_bits( &dim[1], bytes, count1, count2,
+                                          0, memory );
+      if ( error )
+        goto Fail;
+    }
+    return;
+
+  Fail:
+    hints->error = error;
+  }
+
+
+  /* end recording session */
+  static FT_Error
+  ps_hints_close( PS_Hints  hints,
+                  FT_UInt   end_point )
+  {
+    FT_Error  error;
+
+
+    error = hints->error;
+    if ( !error )
+    {
+      FT_Memory     memory = hints->memory;
+      PS_Dimension  dim    = hints->dimension;
+
+
+      error = ps_dimension_end( &dim[0], end_point, memory );
+      if ( !error )
+      {
+        error = ps_dimension_end( &dim[1], end_point, memory );
+      }
+    }
+
+#ifdef DEBUG_HINTER
+    if ( !error )
+      ps_debug_hints = hints;
+#endif
+    return error;
+  }
+
+
+  /*************************************************************************/
+  /*************************************************************************/
+  /*****                                                               *****/
+  /*****                TYPE 1 HINTS RECORDING INTERFACE               *****/
+  /*****                                                               *****/
+  /*************************************************************************/
+  /*************************************************************************/
+
+  static void
+  t1_hints_open( T1_Hints  hints )
+  {
+    ps_hints_open( (PS_Hints)hints, PS_HINT_TYPE_1 );
+  }
+
+  static void
+  t1_hints_stem( T1_Hints  hints,
+                 FT_Int    dimension,
+                 FT_Long*  coords )
+  {
+    ps_hints_stem( (PS_Hints)hints, dimension, 1, coords );
+  }
+
+
+  FT_LOCAL_DEF( void )
+  t1_hints_funcs_init( T1_Hints_FuncsRec*  funcs )
+  {
+    FT_MEM_ZERO( (char*)funcs, sizeof ( *funcs ) );
+
+    funcs->open  = (T1_Hints_OpenFunc)    t1_hints_open;
+    funcs->close = (T1_Hints_CloseFunc)   ps_hints_close;
+    funcs->stem  = (T1_Hints_SetStemFunc) t1_hints_stem;
+    funcs->stem3 = (T1_Hints_SetStem3Func)ps_hints_t1stem3;
+    funcs->reset = (T1_Hints_ResetFunc)   ps_hints_t1reset;
+    funcs->apply = (T1_Hints_ApplyFunc)   ps_hints_apply;
+  }
+
+
+  /*************************************************************************/
+  /*************************************************************************/
+  /*****                                                               *****/
+  /*****                TYPE 2 HINTS RECORDING INTERFACE               *****/
+  /*****                                                               *****/
+  /*************************************************************************/
+  /*************************************************************************/
+
+  static void
+  t2_hints_open( T2_Hints  hints )
+  {
+    ps_hints_open( (PS_Hints)hints, PS_HINT_TYPE_2 );
+  }
+
+
+  static void
+  t2_hints_stems( T2_Hints   hints,
+                  FT_Int     dimension,
+                  FT_Int     count,
+                  FT_Fixed*  coords )
+  {
+    FT_Pos  stems[32], y, n;
+    FT_Int  total = count;
+
+
+    y = 0;
+    while ( total > 0 )
+    {
+      /* determine number of stems to write */
+      count = total;
+      if ( count > 16 )
+        count = 16;
+
+      /* compute integer stem positions in font units */
+      for ( n = 0; n < count * 2; n++ )
+      {
+        y       += coords[n];
+        stems[n] = ( y + 0x8000L ) >> 16;
+      }
+
+      /* compute lengths */
+      for ( n = 0; n < count * 2; n += 2 )
+        stems[n + 1] = stems[n + 1] - stems[n];
+
+      /* add them to the current dimension */
+      ps_hints_stem( (PS_Hints)hints, dimension, count, stems );
+
+      total -= count;
+    }
+  }
+
+
+  FT_LOCAL_DEF( void )
+  t2_hints_funcs_init( T2_Hints_FuncsRec*  funcs )
+  {
+    FT_MEM_ZERO( funcs, sizeof ( *funcs ) );
+
+    funcs->open    = (T2_Hints_OpenFunc)   t2_hints_open;
+    funcs->close   = (T2_Hints_CloseFunc)  ps_hints_close;
+    funcs->stems   = (T2_Hints_StemsFunc)  t2_hints_stems;
+    funcs->hintmask= (T2_Hints_MaskFunc)   ps_hints_t2mask;
+    funcs->counter = (T2_Hints_CounterFunc)ps_hints_t2counter;
+    funcs->apply   = (T2_Hints_ApplyFunc)  ps_hints_apply;
+  }
+
+
+/* END */
diff --git a/src/pshinter/pshrec.h b/src/pshinter/pshrec.h
new file mode 100644
index 0000000..dcb3197
--- /dev/null
+++ b/src/pshinter/pshrec.h
@@ -0,0 +1,176 @@
+/***************************************************************************/
+/*                                                                         */
+/*  pshrec.h                                                               */
+/*                                                                         */
+/*    Postscript (Type1/Type2) hints recorder (specification).             */
+/*                                                                         */
+/*  Copyright 2001, 2002, 2003, 2006, 2008 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.                                        */
+/*                                                                         */
+/***************************************************************************/
+
+
+  /**************************************************************************/
+  /*                                                                        */
+  /*  The functions defined here are called from the Type 1, CID and CFF    */
+  /*  font drivers to record the hints of a given character/glyph.          */
+  /*                                                                        */
+  /*  The hints are recorded in a unified format, and are later processed   */
+  /*  by the `optimizer' and `fitter' to adjust the outlines to the pixel   */
+  /*  grid.                                                                 */
+  /*                                                                        */
+  /**************************************************************************/
+
+
+#ifndef __PSHREC_H__
+#define __PSHREC_H__
+
+
+#include <ft2build.h>
+#include FT_INTERNAL_POSTSCRIPT_HINTS_H
+#include "pshglob.h"
+
+
+FT_BEGIN_HEADER
+
+
+  /*************************************************************************/
+  /*************************************************************************/
+  /*****                                                               *****/
+  /*****                 GLYPH HINTS RECORDER INTERNALS                *****/
+  /*****                                                               *****/
+  /*************************************************************************/
+  /*************************************************************************/
+
+  /* handle to hint record */
+  typedef struct PS_HintRec_*  PS_Hint;
+
+  /* hint types */
+  typedef enum  PS_Hint_Type_
+  {
+    PS_HINT_TYPE_1 = 1,
+    PS_HINT_TYPE_2 = 2
+
+  } PS_Hint_Type;
+
+
+  /* hint flags */
+  typedef enum  PS_Hint_Flags_
+  {
+    PS_HINT_FLAG_GHOST  = 1,
+    PS_HINT_FLAG_BOTTOM = 2
+
+  } PS_Hint_Flags;
+
+
+  /* hint descriptor */
+  typedef struct  PS_HintRec_
+  {
+    FT_Int   pos;
+    FT_Int   len;
+    FT_UInt  flags;
+
+  } PS_HintRec;
+
+
+#define ps_hint_is_active( x )  ( (x)->flags & PS_HINT_FLAG_ACTIVE )
+#define ps_hint_is_ghost( x )   ( (x)->flags & PS_HINT_FLAG_GHOST  )
+#define ps_hint_is_bottom( x )  ( (x)->flags & PS_HINT_FLAG_BOTTOM )
+
+
+  /* hints table descriptor */
+  typedef struct  PS_Hint_TableRec_
+  {
+    FT_UInt  num_hints;
+    FT_UInt  max_hints;
+    PS_Hint  hints;
+
+  } PS_Hint_TableRec, *PS_Hint_Table;
+
+
+  /* hint and counter mask descriptor */
+  typedef struct  PS_MaskRec_
+  {
+    FT_UInt   num_bits;
+    FT_UInt   max_bits;
+    FT_Byte*  bytes;
+    FT_UInt   end_point;
+
+  } PS_MaskRec, *PS_Mask;
+
+
+  /* masks and counters table descriptor */
+  typedef struct  PS_Mask_TableRec_
+  {
+    FT_UInt  num_masks;
+    FT_UInt  max_masks;
+    PS_Mask  masks;
+
+  } PS_Mask_TableRec, *PS_Mask_Table;
+
+
+ /* dimension-specific hints descriptor */
+  typedef struct  PS_DimensionRec_
+  {
+    PS_Hint_TableRec  hints;
+    PS_Mask_TableRec  masks;
+    PS_Mask_TableRec  counters;
+
+  } PS_DimensionRec, *PS_Dimension;
+
+
+  /* glyph hints descriptor                                */
+  /* dimension 0 => X coordinates + vertical hints/stems   */
+  /* dimension 1 => Y coordinates + horizontal hints/stems */
+  typedef struct  PS_HintsRec_
+  {
+    FT_Memory        memory;
+    FT_Error         error;
+    FT_UInt32        magic;
+    PS_Hint_Type     hint_type;
+    PS_DimensionRec  dimension[2];
+
+  } PS_HintsRec, *PS_Hints;
+
+  /* */
+
+  /* initialize hints recorder */
+  FT_LOCAL( FT_Error )
+  ps_hints_init( PS_Hints   hints,
+                 FT_Memory  memory );
+
+  /* finalize hints recorder */
+  FT_LOCAL( void )
+  ps_hints_done( PS_Hints  hints );
+
+  /* initialize Type1 hints recorder interface */
+  FT_LOCAL( void )
+  t1_hints_funcs_init( T1_Hints_FuncsRec*  funcs );
+
+  /* initialize Type2 hints recorder interface */
+  FT_LOCAL( void )
+  t2_hints_funcs_init( T2_Hints_FuncsRec*  funcs );
+
+
+#ifdef DEBUG_HINTER
+  extern PS_Hints  ps_debug_hints;
+  extern  int      ps_debug_no_horz_hints;
+  extern  int      ps_debug_no_vert_hints;
+#endif
+
+ /* */
+
+
+FT_END_HEADER
+
+
+#endif /* __PS_HINTER_RECORD_H__ */
+
+
+/* END */