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, 163 insertions, 0 deletions

diff --git a/third_party/freetype/src/base/ftsynth.c b/third_party/freetype/src/base/ftsynth.c
new file mode 100644
index 0000000000..0567bd537a
--- /dev/null
+++ b/third_party/freetype/src/base/ftsynth.c
@@ -0,0 +1,163 @@
+/***************************************************************************/
+/*                                                                         */
+/*  ftsynth.c                                                              */
+/*                                                                         */
+/*    FreeType synthesizing code for emboldening and slanting (body).      */
+/*                                                                         */
+/*  Copyright 2000-2006, 2010, 2012-2014 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_SYNTHESIS_H
+#include FT_INTERNAL_DEBUG_H
+#include FT_INTERNAL_OBJECTS_H
+#include FT_OUTLINE_H
+#include FT_BITMAP_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_synth
+
+
+  /*************************************************************************/
+  /*************************************************************************/
+  /****                                                                 ****/
+  /****   EXPERIMENTAL OBLIQUING SUPPORT                                ****/
+  /****                                                                 ****/
+  /*************************************************************************/
+  /*************************************************************************/
+
+  /* documentation is in ftsynth.h */
+
+  FT_EXPORT_DEF( void )
+  FT_GlyphSlot_Oblique( FT_GlyphSlot  slot )
+  {
+    FT_Matrix    transform;
+    FT_Outline*  outline;
+
+
+    if ( !slot )
+      return;
+
+    outline = &slot->outline;
+
+    /* only oblique outline glyphs */
+    if ( slot->format != FT_GLYPH_FORMAT_OUTLINE )
+      return;
+
+    /* we don't touch the advance width */
+
+    /* For italic, simply apply a shear transform, with an angle */
+    /* of about 12 degrees.                                      */
+
+    transform.xx = 0x10000L;
+    transform.yx = 0x00000L;
+
+    transform.xy = 0x0366AL;
+    transform.yy = 0x10000L;
+
+    FT_Outline_Transform( outline, &transform );
+  }
+
+
+  /*************************************************************************/
+  /*************************************************************************/
+  /****                                                                 ****/
+  /****   EXPERIMENTAL EMBOLDENING SUPPORT                              ****/
+  /****                                                                 ****/
+  /*************************************************************************/
+  /*************************************************************************/
+
+
+  /* documentation is in ftsynth.h */
+
+  FT_EXPORT_DEF( void )
+  FT_GlyphSlot_Embolden( FT_GlyphSlot  slot )
+  {
+    FT_Library  library;
+    FT_Face     face;
+    FT_Error    error;
+    FT_Pos      xstr, ystr;
+
+
+    if ( !slot )
+      return;
+
+    library = slot->library;
+    face    = slot->face;
+
+    if ( slot->format != FT_GLYPH_FORMAT_OUTLINE &&
+         slot->format != FT_GLYPH_FORMAT_BITMAP  )
+      return;
+
+    /* some reasonable strength */
+    xstr = FT_MulFix( face->units_per_EM,
+                      face->size->metrics.y_scale ) / 24;
+    ystr = xstr;
+
+    if ( slot->format == FT_GLYPH_FORMAT_OUTLINE )
+      FT_Outline_EmboldenXY( &slot->outline, xstr, ystr );
+
+    else /* slot->format == FT_GLYPH_FORMAT_BITMAP */
+    {
+      /* round to full pixels */
+      xstr &= ~63;
+      if ( xstr == 0 )
+        xstr = 1 << 6;
+      ystr &= ~63;
+
+      /*
+       * XXX: overflow check for 16-bit system, for compatibility
+       *      with FT_GlyphSlot_Embolden() since freetype-2.1.10.
+       *      unfortunately, this function return no informations
+       *      about the cause of error.
+       */
+      if ( ( ystr >> 6 ) > FT_INT_MAX || ( ystr >> 6 ) < FT_INT_MIN )
+      {
+        FT_TRACE1(( "FT_GlyphSlot_Embolden:" ));
+        FT_TRACE1(( "too strong embolding parameter ystr=%d\n", ystr ));
+        return;
+      }
+      error = FT_GlyphSlot_Own_Bitmap( slot );
+      if ( error )
+        return;
+
+      error = FT_Bitmap_Embolden( library, &slot->bitmap, xstr, ystr );
+      if ( error )
+        return;
+    }
+
+    if ( slot->advance.x )
+      slot->advance.x += xstr;
+
+    if ( slot->advance.y )
+      slot->advance.y += ystr;
+
+    slot->metrics.width        += xstr;
+    slot->metrics.height       += ystr;
+    slot->metrics.horiAdvance  += xstr;
+    slot->metrics.vertAdvance  += ystr;
+    slot->metrics.horiBearingY += ystr;
+
+    /* XXX: 16-bit overflow case must be excluded before here */
+    if ( slot->format == FT_GLYPH_FORMAT_BITMAP )
+      slot->bitmap_top += (FT_Int)( ystr >> 6 );
+  }
+
+
+/* END */