XFA: merge patch from CL 815103002

Update freetype to 2.5.4.

Put freetype into third_party directory, cleaning up header files.

Previously freetype header files are in core/src/fxge/freetype and core/include/thirdparties. There were also multiple fx_freetype.h.

This patch removes the additional Foxit wrapper to make further update easier.

Notice, for original freetype source code, the following files are modified and need to be updated accordingly in future update:

third_party/freetype/include/config/ftmodule.h
third_party/freetype/include/config/ftoption.h

BUG=407341
R=thestig@chromium.org

Review URL: https://codereview.chromium.org/815103002

1 files changed, 306 insertions, 0 deletions

diff --git a/third_party/freetype/src/sfnt/ttkern.c b/third_party/freetype/src/sfnt/ttkern.c
new file mode 100644
index 0000000000..455e7b5e3d
--- /dev/null
+++ b/third_party/freetype/src/sfnt/ttkern.c
@@ -0,0 +1,306 @@
+/***************************************************************************/
+/*                                                                         */
+/*  ttkern.c                                                               */
+/*                                                                         */
+/*    Load the basic TrueType kerning table.  This doesn't handle          */
+/*    kerning data within the GPOS table at the moment.                    */
+/*                                                                         */
+/*  Copyright 1996-2007, 2009, 2010, 2013 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_DEBUG_H
+#include FT_INTERNAL_STREAM_H
+#include FT_TRUETYPE_TAGS_H
+#include "ttkern.h"
+
+#include "sferrors.h"
+
+
+  /*************************************************************************/
+  /*                                                                       */
+  /* The macro FT_COMPONENT is used in trace mode.  It is an implicit      */
+  /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log  */
+  /* messages during execution.                                            */
+  /*                                                                       */
+#undef  FT_COMPONENT
+#define FT_COMPONENT  trace_ttkern
+
+
+#undef  TT_KERN_INDEX
+#define TT_KERN_INDEX( g1, g2 )  ( ( (FT_ULong)(g1) << 16 ) | (g2) )
+
+
+  FT_LOCAL_DEF( FT_Error )
+  tt_face_load_kern( TT_Face    face,
+                     FT_Stream  stream )
+  {
+    FT_Error   error;
+    FT_ULong   table_size;
+    FT_Byte*   p;
+    FT_Byte*   p_limit;
+    FT_UInt    nn, num_tables;
+    FT_UInt32  avail = 0, ordered = 0;
+
+
+    /* the kern table is optional; exit silently if it is missing */
+    error = face->goto_table( face, TTAG_kern, stream, &table_size );
+    if ( error )
+      goto Exit;
+
+    if ( table_size < 4 )  /* the case of a malformed table */
+    {
+      FT_ERROR(( "tt_face_load_kern:"
+                 " kerning table is too small - ignored\n" ));
+      error = FT_THROW( Table_Missing );
+      goto Exit;
+    }
+
+    if ( FT_FRAME_EXTRACT( table_size, face->kern_table ) )
+    {
+      FT_ERROR(( "tt_face_load_kern:"
+                 " could not extract kerning table\n" ));
+      goto Exit;
+    }
+
+    face->kern_table_size = table_size;
+
+    p       = face->kern_table;
+    p_limit = p + table_size;
+
+    p         += 2; /* skip version */
+    num_tables = FT_NEXT_USHORT( p );
+
+    if ( num_tables > 32 ) /* we only support up to 32 sub-tables */
+      num_tables = 32;
+
+    for ( nn = 0; nn < num_tables; nn++ )
+    {
+      FT_UInt    num_pairs, length, coverage;
+      FT_Byte*   p_next;
+      FT_UInt32  mask = (FT_UInt32)1UL << nn;
+
+
+      if ( p + 6 > p_limit )
+        break;
+
+      p_next = p;
+
+      p += 2; /* skip version */
+      length   = FT_NEXT_USHORT( p );
+      coverage = FT_NEXT_USHORT( p );
+
+      if ( length <= 6 + 8 )
+        break;
+
+      p_next += length;
+
+      if ( p_next > p_limit )  /* handle broken table */
+        p_next = p_limit;
+
+      /* only use horizontal kerning tables */
+      if ( ( coverage & ~8 ) != 0x0001 ||
+           p + 8 > p_limit             )
+        goto NextTable;
+
+      num_pairs = FT_NEXT_USHORT( p );
+      p        += 6;
+
+      if ( ( p_next - p ) < 6 * (int)num_pairs ) /* handle broken count */
+        num_pairs = (FT_UInt)( ( p_next - p ) / 6 );
+
+      avail |= mask;
+
+      /*
+       *  Now check whether the pairs in this table are ordered.
+       *  We then can use binary search.
+       */
+      if ( num_pairs > 0 )
+      {
+        FT_ULong  count;
+        FT_ULong  old_pair;
+
+
+        old_pair = FT_NEXT_ULONG( p );
+        p       += 2;
+
+        for ( count = num_pairs - 1; count > 0; count-- )
+        {
+          FT_UInt32  cur_pair;
+
+
+          cur_pair = FT_NEXT_ULONG( p );
+          if ( cur_pair <= old_pair )
+            break;
+
+          p += 2;
+          old_pair = cur_pair;
+        }
+
+        if ( count == 0 )
+          ordered |= mask;
+      }
+
+    NextTable:
+      p = p_next;
+    }
+
+    face->num_kern_tables = nn;
+    face->kern_avail_bits = avail;
+    face->kern_order_bits = ordered;
+
+  Exit:
+    return error;
+  }
+
+
+  FT_LOCAL_DEF( void )
+  tt_face_done_kern( TT_Face  face )
+  {
+    FT_Stream  stream = face->root.stream;
+
+
+    FT_FRAME_RELEASE( face->kern_table );
+    face->kern_table_size = 0;
+    face->num_kern_tables = 0;
+    face->kern_avail_bits = 0;
+    face->kern_order_bits = 0;
+  }
+
+
+  FT_LOCAL_DEF( FT_Int )
+  tt_face_get_kerning( TT_Face  face,
+                       FT_UInt  left_glyph,
+                       FT_UInt  right_glyph )
+  {
+    FT_Int    result = 0;
+    FT_UInt   count, mask;
+    FT_Byte*  p       = face->kern_table;
+    FT_Byte*  p_limit = p + face->kern_table_size;
+
+
+    p   += 4;
+    mask = 0x0001;
+
+    for ( count = face->num_kern_tables;
+          count > 0 && p + 6 <= p_limit;
+          count--, mask <<= 1 )
+    {
+      FT_Byte* base     = p;
+      FT_Byte* next;
+      FT_UInt  version  = FT_NEXT_USHORT( p );
+      FT_UInt  length   = FT_NEXT_USHORT( p );
+      FT_UInt  coverage = FT_NEXT_USHORT( p );
+      FT_UInt  num_pairs;
+      FT_Int   value    = 0;
+
+      FT_UNUSED( version );
+
+
+      next = base + length;
+
+      if ( next > p_limit )  /* handle broken table */
+        next = p_limit;
+
+      if ( ( face->kern_avail_bits & mask ) == 0 )
+        goto NextTable;
+
+      if ( p + 8 > next )
+        goto NextTable;
+
+      num_pairs = FT_NEXT_USHORT( p );
+      p        += 6;
+
+      if ( ( next - p ) < 6 * (int)num_pairs )  /* handle broken count  */
+        num_pairs = (FT_UInt)( ( next - p ) / 6 );
+
+      switch ( coverage >> 8 )
+      {
+      case 0:
+        {
+          FT_ULong  key0 = TT_KERN_INDEX( left_glyph, right_glyph );
+
+
+          if ( face->kern_order_bits & mask )   /* binary search */
+          {
+            FT_UInt   min = 0;
+            FT_UInt   max = num_pairs;
+
+
+            while ( min < max )
+            {
+              FT_UInt   mid = ( min + max ) >> 1;
+              FT_Byte*  q   = p + 6 * mid;
+              FT_ULong  key;
+
+
+              key = FT_NEXT_ULONG( q );
+
+              if ( key == key0 )
+              {
+                value = FT_PEEK_SHORT( q );
+                goto Found;
+              }
+              if ( key < key0 )
+                min = mid + 1;
+              else
+                max = mid;
+            }
+          }
+          else /* linear search */
+          {
+            FT_UInt  count2;
+
+
+            for ( count2 = num_pairs; count2 > 0; count2-- )
+            {
+              FT_ULong  key = FT_NEXT_ULONG( p );
+
+
+              if ( key == key0 )
+              {
+                value = FT_PEEK_SHORT( p );
+                goto Found;
+              }
+              p += 2;
+            }
+          }
+        }
+        break;
+
+       /*
+        *  We don't support format 2 because we haven't seen a single font
+        *  using it in real life...
+        */
+
+      default:
+        ;
+      }
+
+      goto NextTable;
+
+    Found:
+      if ( coverage & 8 ) /* override or add */
+        result = value;
+      else
+        result += value;
+
+    NextTable:
+      p = next;
+    }
+
+    return result;
+  }
+
+#undef TT_KERN_INDEX
+
+/* END */