Update bundled FreeType to 2.6.1

Change-Id: Ic489f8aa8ad42da3922f542e6c9064afe44f3799
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@theqtcompany.com>
Reviewed-by: Lars Knoll <lars.knoll@theqtcompany.com>

1 files changed, 131 insertions, 68 deletions

diff --git a/src/3rdparty/freetype/src/autofit/afhints.c b/src/3rdparty/freetype/src/autofit/afhints.c
index f3cc50f202..37482ebd1f 100644
--- a/src/3rdparty/freetype/src/autofit/afhints.c
+++ b/src/3rdparty/freetype/src/autofit/afhints.c
@@ -4,7 +4,7 @@
 /*                                                                         */
 /*    Auto-fitter hinting routines (body).                                 */
 /*                                                                         */
-/*  Copyright 2003-2007, 2009-2014 by                                      */
+/*  Copyright 2003-2015 by                                                 */
 /*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
 /*                                                                         */
 /*  This file is part of the FreeType project, and may only be used,       */
@@ -43,7 +43,15 @@
     AF_Segment  segment = NULL;
 
 
-    if ( axis->num_segments >= axis->max_segments )
+    if ( axis->num_segments < AF_SEGMENTS_EMBEDDED )
+    {
+      if ( axis->segments == NULL )
+      {
+        axis->segments     = axis->embedded.segments;
+        axis->max_segments = AF_SEGMENTS_EMBEDDED;
+      }
+    }
+    else if ( axis->num_segments >= axis->max_segments )
     {
       FT_Int  old_max = axis->max_segments;
       FT_Int  new_max = old_max;
@@ -60,8 +68,18 @@
       if ( new_max < old_max || new_max > big_max )
         new_max = big_max;
 
-      if ( FT_RENEW_ARRAY( axis->segments, old_max, new_max ) )
-        goto Exit;
+      if ( axis->segments == axis->embedded.segments )
+      {
+        if ( FT_NEW_ARRAY( axis->segments, new_max ) )
+          goto Exit;
+        ft_memcpy( axis->segments, axis->embedded.segments,
+                   sizeof ( axis->embedded.segments ) );
+      }
+      else
+      {
+        if ( FT_RENEW_ARRAY( axis->segments, old_max, new_max ) )
+          goto Exit;
+      }
 
       axis->max_segments = new_max;
     }
@@ -89,7 +107,15 @@
     AF_Edge   edges;
 
 
-    if ( axis->num_edges >= axis->max_edges )
+    if ( axis->num_edges < AF_EDGES_EMBEDDED )
+    {
+      if ( axis->edges == NULL )
+      {
+        axis->edges     = axis->embedded.edges;
+        axis->max_edges = AF_EDGES_EMBEDDED;
+      }
+    }
+    else if ( axis->num_edges >= axis->max_edges )
     {
       FT_Int  old_max = axis->max_edges;
       FT_Int  new_max = old_max;
@@ -106,8 +132,18 @@
       if ( new_max < old_max || new_max > big_max )
         new_max = big_max;
 
-      if ( FT_RENEW_ARRAY( axis->edges, old_max, new_max ) )
-        goto Exit;
+      if ( axis->edges == axis->embedded.edges )
+      {
+        if ( FT_NEW_ARRAY( axis->edges, new_max ) )
+          goto Exit;
+        ft_memcpy( axis->edges, axis->embedded.edges,
+                   sizeof ( axis->embedded.edges ) );
+      }
+      else
+      {
+        if ( FT_RENEW_ARRAY( axis->edges, old_max, new_max ) )
+          goto Exit;
+      }
 
       axis->max_edges = new_max;
     }
@@ -195,9 +231,13 @@
     AF_Point  point;
 
 
-    AF_DUMP(( "Table of points:\n"
-              "  [ index |  xorg |  yorg | xscale | yscale"
-              " |  xfit |  yfit |  flags ]\n" ));
+    AF_DUMP(( "Table of points:\n" ));
+
+    if ( hints->num_points )
+      AF_DUMP(( "  [ index |  xorg |  yorg | xscale | yscale"
+                " |  xfit |  yfit |  flags ]\n" ));
+    else
+      AF_DUMP(( "  (none)\n" ));
 
     for ( point = points; point < limit; point++ )
       AF_DUMP(( "  [ %5d | %5d | %5d | %6.2f | %6.2f"
@@ -218,7 +258,7 @@
 
 
   static const char*
-  af_edge_flags_to_string( AF_Edge_Flags  flags )
+  af_edge_flags_to_string( FT_UInt  flags )
   {
     static char  temp[32];
     int          pos = 0;
@@ -293,7 +333,7 @@
                   AF_INDEX_NUM( seg->edge, edges ),
                   seg->height,
                   seg->height - ( seg->max_coord - seg->min_coord ),
-                  af_edge_flags_to_string( (AF_Edge_Flags)seg->flags ) ));
+                  af_edge_flags_to_string( seg->flags ) ));
       AF_DUMP(( "\n" ));
     }
   }
@@ -420,7 +460,7 @@
                   edge->blue_edge ? 'y' : 'n',
                   edge->opos / 64.0,
                   edge->pos / 64.0,
-                  af_edge_flags_to_string( (AF_Edge_Flags)edge->flags ) ));
+                  af_edge_flags_to_string( edge->flags ) ));
       AF_DUMP(( "\n" ));
     }
   }
@@ -469,15 +509,15 @@
       else
       {
         dir = AF_DIR_DOWN;
-        ll  = dy;
+        ll  = -dy;
         ss  = dx;
       }
     }
 
-    /* return no direction if arm lengths differ too much            */
+    /* return no direction if arm lengths do not differ enough       */
     /* (value 14 is heuristic, corresponding to approx. 4.1 degrees) */
-    ss *= 14;
-    if ( FT_ABS( ll ) <= FT_ABS( ss ) )
+    /* the long arm is never negative                                */
+    if ( ll <= 14 * FT_ABS( ss ) )
       dir = AF_DIR_NONE;
 
     return dir;
@@ -488,7 +528,8 @@
   af_glyph_hints_init( AF_GlyphHints  hints,
                        FT_Memory      memory )
   {
-    FT_ZERO( hints );
+    /* no need to initialize the embedded items */
+    FT_MEM_ZERO( hints, sizeof ( *hints ) - sizeof ( hints->embedded ) );
     hints->memory = memory;
   }
 
@@ -496,13 +537,15 @@
   FT_LOCAL_DEF( void )
   af_glyph_hints_done( AF_GlyphHints  hints )
   {
-    FT_Memory  memory = hints->memory;
+    FT_Memory  memory;
     int        dim;
 
 
     if ( !( hints && hints->memory ) )
       return;
 
+    memory = hints->memory;
+
     /*
      *  note that we don't need to free the segment and edge
      *  buffers since they are really within the hints->points array
@@ -514,20 +557,24 @@
 
       axis->num_segments = 0;
       axis->max_segments = 0;
-      FT_FREE( axis->segments );
+      if ( axis->segments != axis->embedded.segments )
+        FT_FREE( axis->segments );
 
       axis->num_edges = 0;
       axis->max_edges = 0;
-      FT_FREE( axis->edges );
+      if ( axis->edges != axis->embedded.edges )
+        FT_FREE( axis->edges );
     }
 
-    FT_FREE( hints->contours );
+    if ( hints->contours != hints->embedded.contours )
+      FT_FREE( hints->contours );
     hints->max_contours = 0;
     hints->num_contours = 0;
 
-    FT_FREE( hints->points );
-    hints->num_points = 0;
+    if ( hints->points != hints->embedded.points )
+      FT_FREE( hints->points );
     hints->max_points = 0;
+    hints->num_points = 0;
 
     hints->memory = NULL;
   }
@@ -571,15 +618,27 @@
 
     /* first of all, reallocate the contours array if necessary */
     new_max = (FT_UInt)outline->n_contours;
-    old_max = hints->max_contours;
-    if ( new_max > old_max )
+    old_max = (FT_UInt)hints->max_contours;
+
+    if ( new_max <= AF_CONTOURS_EMBEDDED )
+    {
+      if ( hints->contours == NULL )
+      {
+        hints->contours     = hints->embedded.contours;
+        hints->max_contours = AF_CONTOURS_EMBEDDED;
+      }
+    }
+    else if ( new_max > old_max )
     {
-      new_max = ( new_max + 3 ) & ~3; /* round up to a multiple of 4 */
+      if ( hints->contours == hints->embedded.contours )
+        hints->contours = NULL;
+
+      new_max = ( new_max + 3 ) & ~3U; /* round up to a multiple of 4 */
 
       if ( FT_RENEW_ARRAY( hints->contours, old_max, new_max ) )
         goto Exit;
 
-      hints->max_contours = new_max;
+      hints->max_contours = (FT_Int)new_max;
     }
 
     /*
@@ -588,15 +647,27 @@
      *  hint metrics appropriately
      */
     new_max = (FT_UInt)( outline->n_points + 2 );
-    old_max = hints->max_points;
-    if ( new_max > old_max )
+    old_max = (FT_UInt)hints->max_points;
+
+    if ( new_max <= AF_POINTS_EMBEDDED )
+    {
+      if ( hints->points == NULL )
+      {
+        hints->points     = hints->embedded.points;
+        hints->max_points = AF_POINTS_EMBEDDED;
+      }
+    }
+    else if ( new_max > old_max )
     {
-      new_max = ( new_max + 2 + 7 ) & ~7; /* round up to a multiple of 8 */
+      if ( hints->points == hints->embedded.points )
+        hints->points = NULL;
+
+      new_max = ( new_max + 2 + 7 ) & ~7U; /* round up to a multiple of 8 */
 
       if ( FT_RENEW_ARRAY( hints->points, old_max, new_max ) )
         goto Exit;
 
-      hints->max_points = new_max;
+      hints->max_points = (FT_Int)new_max;
     }
 
     hints->num_points   = outline->n_points;
@@ -721,8 +792,6 @@
 
           FT_Pos  out_x, out_y;
 
-          FT_Bool  is_first;
-
 
           /* since the first point of a contour could be part of a */
           /* series of near points, go backwards to find the first */
@@ -773,17 +842,13 @@
           out_x = 0;
           out_y = 0;
 
-          is_first = 1;
-
-          for ( point = first;
-                point != first || is_first;
-                point = point->next )
+          next = first;
+          do
           {
             AF_Direction  out_dir;
 
 
-            is_first = 0;
-
+            point = next;
             next = point->next;
 
             out_x += next->fx - point->fx;
@@ -815,7 +880,8 @@
 
             out_x = 0;
             out_y = 0;
-          }
+
+          } while ( next != first );
         }
 
         /*
@@ -1045,7 +1111,7 @@
     AF_AxisHints  axis        = &hints->axis[dim];
     AF_Edge       edges       = axis->edges;
     AF_Edge       edge_limit  = edges + axis->num_edges;
-    AF_Flags      touch_flag;
+    FT_UInt       touch_flag;
 
 
     if ( dim == AF_DIMENSION_HORZ )
@@ -1226,33 +1292,27 @@
                  AF_Point  ref2 )
   {
     AF_Point  p;
-    FT_Pos    u;
-    FT_Pos    v1 = ref1->v;
-    FT_Pos    v2 = ref2->v;
-    FT_Pos    d1 = ref1->u - v1;
-    FT_Pos    d2 = ref2->u - v2;
+    FT_Pos    u, v1, v2, u1, u2, d1, d2;
 
 
     if ( p1 > p2 )
       return;
 
-    if ( v1 == v2 )
+    if ( ref1->v > ref2->v )
     {
-      for ( p = p1; p <= p2; p++ )
-      {
-        u = p->v;
-
-        if ( u <= v1 )
-          u += d1;
-        else
-          u += d2;
-
-        p->u = u;
-      }
-      return;
+      p    = ref1;
+      ref1 = ref2;
+      ref2 = p;
     }
 
-    if ( v1 < v2 )
+    v1 = ref1->v;
+    v2 = ref2->v;
+    u1 = ref1->u;
+    u2 = ref2->u;
+    d1 = u1 - v1;
+    d2 = u2 - v2;
+
+    if ( u1 == u2 || v1 == v2 )
     {
       for ( p = p1; p <= p2; p++ )
       {
@@ -1263,23 +1323,26 @@
         else if ( u >= v2 )
           u += d2;
         else
-          u = ref1->u + FT_MulDiv( u - v1, ref2->u - ref1->u, v2 - v1 );
+          u = u1;
 
         p->u = u;
       }
     }
     else
     {
+      FT_Fixed  scale = FT_DivFix( u2 - u1, v2 - v1 );
+
+
       for ( p = p1; p <= p2; p++ )
       {
         u = p->v;
 
-        if ( u <= v2 )
-          u += d2;
-        else if ( u >= v1 )
+        if ( u <= v1 )
           u += d1;
+        else if ( u >= v2 )
+          u += d2;
         else
-          u = ref1->u + FT_MulDiv( u - v1, ref2->u - ref1->u, v2 - v1 );
+          u = u1 + FT_MulFix( u - v1, scale );
 
         p->u = u;
       }
@@ -1298,7 +1361,7 @@
     AF_Point   point_limit   = points + hints->num_points;
     AF_Point*  contour       = hints->contours;
     AF_Point*  contour_limit = contour + hints->num_contours;
-    AF_Flags   touch_flag;
+    FT_UInt    touch_flag;
     AF_Point   point;
     AF_Point   end_point;
     AF_Point   first_point;