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, 502 insertions, 0 deletions

diff --git a/third_party/freetype/src/base/ftbbox.c b/third_party/freetype/src/base/ftbbox.c
new file mode 100644
index 0000000000..c775d5c8cf
--- /dev/null
+++ b/third_party/freetype/src/base/ftbbox.c
@@ -0,0 +1,502 @@
+/***************************************************************************/
+/*                                                                         */
+/*  ftbbox.c                                                               */
+/*                                                                         */
+/*    FreeType bbox computation (body).                                    */
+/*                                                                         */
+/*  Copyright 1996-2002, 2004, 2006, 2010, 2013, 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.                                        */
+/*                                                                         */
+/***************************************************************************/
+
+
+  /*************************************************************************/
+  /*                                                                       */
+  /* This component has a _single_ role: to compute exact outline bounding */
+  /* boxes.                                                                */
+  /*                                                                       */
+  /*************************************************************************/
+
+
+#include <ft2build.h>
+#include FT_INTERNAL_DEBUG_H
+
+#include FT_BBOX_H
+#include FT_IMAGE_H
+#include FT_OUTLINE_H
+#include FT_INTERNAL_CALC_H
+#include FT_INTERNAL_OBJECTS_H
+
+
+  typedef struct  TBBox_Rec_
+  {
+    FT_Vector  last;
+    FT_BBox    bbox;
+
+  } TBBox_Rec;
+
+
+#define FT_UPDATE_BBOX(p, bbox)       \
+  FT_BEGIN_STMNT                      \
+    if ( p->x < bbox.xMin )           \
+      bbox.xMin = p->x;               \
+    if ( p->x > bbox.xMax )           \
+      bbox.xMax = p->x;               \
+    if ( p->y < bbox.yMin )           \
+      bbox.yMin = p->y;               \
+    if ( p->y > bbox.yMax )           \
+      bbox.yMax = p->y;               \
+  FT_END_STMNT
+
+#define CHECK_X( p, bbox )  \
+          ( p->x < bbox.xMin || p->x > bbox.xMax )
+
+#define CHECK_Y( p, bbox )  \
+          ( p->y < bbox.yMin || p->y > bbox.yMax )
+
+
+  /*************************************************************************/
+  /*                                                                       */
+  /* <Function>                                                            */
+  /*    BBox_Move_To                                                       */
+  /*                                                                       */
+  /* <Description>                                                         */
+  /*    This function is used as a `move_to' emitter during                */
+  /*    FT_Outline_Decompose().  It simply records the destination point   */
+  /*    in `user->last'. We also update bbox in case contour starts with   */
+  /*    an implicit `on' point.                                            */
+  /*                                                                       */
+  /* <Input>                                                               */
+  /*    to   :: A pointer to the destination vector.                       */
+  /*                                                                       */
+  /* <InOut>                                                               */
+  /*    user :: A pointer to the current walk context.                     */
+  /*                                                                       */
+  /* <Return>                                                              */
+  /*    Always 0.  Needed for the interface only.                          */
+  /*                                                                       */
+  static int
+  BBox_Move_To( FT_Vector*  to,
+                TBBox_Rec*  user )
+  {
+    FT_UPDATE_BBOX( to, user->bbox );
+
+    user->last = *to;
+
+    return 0;
+  }
+
+
+  /*************************************************************************/
+  /*                                                                       */
+  /* <Function>                                                            */
+  /*    BBox_Line_To                                                       */
+  /*                                                                       */
+  /* <Description>                                                         */
+  /*    This function is used as a `line_to' emitter during                */
+  /*    FT_Outline_Decompose().  It simply records the destination point   */
+  /*    in `user->last'; no further computations are necessary because     */
+  /*    bbox already contains both explicit ends of the line segment.      */
+  /*                                                                       */
+  /* <Input>                                                               */
+  /*    to   :: A pointer to the destination vector.                       */
+  /*                                                                       */
+  /* <InOut>                                                               */
+  /*    user :: A pointer to the current walk context.                     */
+  /*                                                                       */
+  /* <Return>                                                              */
+  /*    Always 0.  Needed for the interface only.                          */
+  /*                                                                       */
+  static int
+  BBox_Line_To( FT_Vector*  to,
+                TBBox_Rec*  user )
+  {
+    user->last = *to;
+
+    return 0;
+  }
+
+
+  /*************************************************************************/
+  /*                                                                       */
+  /* <Function>                                                            */
+  /*    BBox_Conic_Check                                                   */
+  /*                                                                       */
+  /* <Description>                                                         */
+  /*    Find the extrema of a 1-dimensional conic Bezier curve and update  */
+  /*    a bounding range.  This version uses direct computation, as it     */
+  /*    doesn't need square roots.                                         */
+  /*                                                                       */
+  /* <Input>                                                               */
+  /*    y1  :: The start coordinate.                                       */
+  /*                                                                       */
+  /*    y2  :: The coordinate of the control point.                        */
+  /*                                                                       */
+  /*    y3  :: The end coordinate.                                         */
+  /*                                                                       */
+  /* <InOut>                                                               */
+  /*    min :: The address of the current minimum.                         */
+  /*                                                                       */
+  /*    max :: The address of the current maximum.                         */
+  /*                                                                       */
+  static void
+  BBox_Conic_Check( FT_Pos   y1,
+                    FT_Pos   y2,
+                    FT_Pos   y3,
+                    FT_Pos*  min,
+                    FT_Pos*  max )
+  {
+    /* This function is only called when a control off-point is outside */
+    /* the bbox that contains all on-points.  It finds a local extremum */
+    /* within the segment, equal to (y1*y3 - y2*y2)/(y1 - 2*y2 + y3).   */
+    /* Or, offsetting from y2, we get                                   */
+
+    y1 -= y2;
+    y3 -= y2;
+    y2 += FT_MulDiv( y1, y3, y1 + y3 );
+
+    if ( y2 < *min )
+      *min = y2;
+    if ( y2 > *max )
+      *max = y2;
+  }
+
+
+  /*************************************************************************/
+  /*                                                                       */
+  /* <Function>                                                            */
+  /*    BBox_Conic_To                                                      */
+  /*                                                                       */
+  /* <Description>                                                         */
+  /*    This function is used as a `conic_to' emitter during               */
+  /*    FT_Outline_Decompose().  It checks a conic Bezier curve with the   */
+  /*    current bounding box, and computes its extrema if necessary to     */
+  /*    update it.                                                         */
+  /*                                                                       */
+  /* <Input>                                                               */
+  /*    control :: A pointer to a control point.                           */
+  /*                                                                       */
+  /*    to      :: A pointer to the destination vector.                    */
+  /*                                                                       */
+  /* <InOut>                                                               */
+  /*    user    :: The address of the current walk context.                */
+  /*                                                                       */
+  /* <Return>                                                              */
+  /*    Always 0.  Needed for the interface only.                          */
+  /*                                                                       */
+  /* <Note>                                                                */
+  /*    In the case of a non-monotonous arc, we compute directly the       */
+  /*    extremum coordinates, as it is sufficiently fast.                  */
+  /*                                                                       */
+  static int
+  BBox_Conic_To( FT_Vector*  control,
+                 FT_Vector*  to,
+                 TBBox_Rec*  user )
+  {
+    /* in case `to' is implicit and not included in bbox yet */
+    FT_UPDATE_BBOX( to, user->bbox );
+
+    if ( CHECK_X( control, user->bbox ) )
+      BBox_Conic_Check( user->last.x,
+                        control->x,
+                        to->x,
+                        &user->bbox.xMin,
+                        &user->bbox.xMax );
+
+    if ( CHECK_Y( control, user->bbox ) )
+      BBox_Conic_Check( user->last.y,
+                        control->y,
+                        to->y,
+                        &user->bbox.yMin,
+                        &user->bbox.yMax );
+
+    user->last = *to;
+
+    return 0;
+  }
+
+
+  /*************************************************************************/
+  /*                                                                       */
+  /* <Function>                                                            */
+  /*    BBox_Cubic_Check                                                   */
+  /*                                                                       */
+  /* <Description>                                                         */
+  /*    Find the extrema of a 1-dimensional cubic Bezier curve and         */
+  /*    update a bounding range.  This version uses iterative splitting    */
+  /*    because it is faster than the exact solution with square roots.    */
+  /*                                                                       */
+  /* <Input>                                                               */
+  /*    p1  :: The start coordinate.                                       */
+  /*                                                                       */
+  /*    p2  :: The coordinate of the first control point.                  */
+  /*                                                                       */
+  /*    p3  :: The coordinate of the second control point.                 */
+  /*                                                                       */
+  /*    p4  :: The end coordinate.                                         */
+  /*                                                                       */
+  /* <InOut>                                                               */
+  /*    min :: The address of the current minimum.                         */
+  /*                                                                       */
+  /*    max :: The address of the current maximum.                         */
+  /*                                                                       */
+  static FT_Pos
+  cubic_peak( FT_Pos  q1,
+              FT_Pos  q2,
+              FT_Pos  q3,
+              FT_Pos  q4 )
+  {
+    FT_Pos  peak = 0;
+    FT_Int  shift;
+
+    /* This function finds a peak of a cubic segment if it is above 0    */
+    /* using iterative bisection of the segment, or returns 0.           */
+    /* The fixed-point arithmetic of bisection is inherently stable      */
+    /* but may loose accuracy in the two lowest bits.  To compensate,    */
+    /* we upscale the segment if there is room.  Large values may need   */
+    /* to be downscaled to avoid overflows during bisection.             */
+    /* It is called with either q2 or q3 positive, which is necessary    */
+    /* for the peak to exist and avoids undefined FT_MSB.                */
+
+    shift = 27 -
+      FT_MSB( FT_ABS( q1 ) | FT_ABS( q2 ) | FT_ABS( q3 ) | FT_ABS( q4 ) );
+
+    if ( shift > 0 )
+    {
+      /* upscaling too much just wastes time */
+      if ( shift > 2 )
+        shift = 2;
+
+      q1 <<=  shift;
+      q2 <<=  shift;
+      q3 <<=  shift;
+      q4 <<=  shift;
+    }
+    else
+    {
+      q1 >>= -shift;
+      q2 >>= -shift;
+      q3 >>= -shift;
+      q4 >>= -shift;
+    }
+
+    /* for a peak to exist above 0, the cubic segment must have */
+    /* at least one of its control off-points above 0.          */
+    while ( q2 > 0 || q3 > 0 )
+    {
+      /* determine which half contains the maximum and split */
+      if ( q1 + q2 > q3 + q4 ) /* first half */
+      {
+        q4 = q4 + q3;
+        q3 = q3 + q2;
+        q2 = q2 + q1;
+        q4 = q4 + q3;
+        q3 = q3 + q2;
+        q4 = ( q4 + q3 ) / 8;
+        q3 = q3 / 4;
+        q2 = q2 / 2;
+      }
+      else                     /* second half */
+      {
+        q1 = q1 + q2;
+        q2 = q2 + q3;
+        q3 = q3 + q4;
+        q1 = q1 + q2;
+        q2 = q2 + q3;
+        q1 = ( q1 + q2 ) / 8;
+        q2 = q2 / 4;
+        q3 = q3 / 2;
+      }
+
+      /* check whether either end reached the maximum */
+      if ( q1 == q2 && q1 >= q3 )
+      {
+        peak = q1;
+        break;
+      }
+      if ( q3 == q4 && q2 <= q4 )
+      {
+        peak = q4;
+        break;
+      }
+    }
+
+    if ( shift > 0 )
+      peak >>=  shift;
+    else
+      peak <<= -shift;
+
+    return peak;
+  }
+
+
+  static void
+  BBox_Cubic_Check( FT_Pos   p1,
+                    FT_Pos   p2,
+                    FT_Pos   p3,
+                    FT_Pos   p4,
+                    FT_Pos*  min,
+                    FT_Pos*  max )
+  {
+    /* This function is only called when a control off-point is outside  */
+    /* the bbox that contains all on-points.  So at least one of the     */
+    /* conditions below holds and cubic_peak is called with at least one */
+    /* non-zero argument.                                                */
+
+    if ( p2 > *max || p3 > *max )
+      *max += cubic_peak( p1 - *max, p2 - *max, p3 - *max, p4 - *max );
+
+    /* now flip the signs to update the minimum */
+    if ( p2 < *min || p3 < *min )
+      *min -= cubic_peak( *min - p1, *min - p2, *min - p3, *min - p4 );
+  }
+
+
+  /*************************************************************************/
+  /*                                                                       */
+  /* <Function>                                                            */
+  /*    BBox_Cubic_To                                                      */
+  /*                                                                       */
+  /* <Description>                                                         */
+  /*    This function is used as a `cubic_to' emitter during               */
+  /*    FT_Outline_Decompose().  It checks a cubic Bezier curve with the   */
+  /*    current bounding box, and computes its extrema if necessary to     */
+  /*    update it.                                                         */
+  /*                                                                       */
+  /* <Input>                                                               */
+  /*    control1 :: A pointer to the first control point.                  */
+  /*                                                                       */
+  /*    control2 :: A pointer to the second control point.                 */
+  /*                                                                       */
+  /*    to       :: A pointer to the destination vector.                   */
+  /*                                                                       */
+  /* <InOut>                                                               */
+  /*    user     :: The address of the current walk context.               */
+  /*                                                                       */
+  /* <Return>                                                              */
+  /*    Always 0.  Needed for the interface only.                          */
+  /*                                                                       */
+  /* <Note>                                                                */
+  /*    In the case of a non-monotonous arc, we don't compute directly     */
+  /*    extremum coordinates, we subdivide instead.                        */
+  /*                                                                       */
+  static int
+  BBox_Cubic_To( FT_Vector*  control1,
+                 FT_Vector*  control2,
+                 FT_Vector*  to,
+                 TBBox_Rec*  user )
+  {
+    /* We don't need to check `to' since it is always an on-point,    */
+    /* thus within the bbox.  Only segments with an off-point outside */
+    /* the bbox can possibly reach new extreme values.                */
+
+    if ( CHECK_X( control1, user->bbox ) ||
+         CHECK_X( control2, user->bbox ) )
+      BBox_Cubic_Check( user->last.x,
+                        control1->x,
+                        control2->x,
+                        to->x,
+                        &user->bbox.xMin,
+                        &user->bbox.xMax );
+
+    if ( CHECK_Y( control1, user->bbox ) ||
+         CHECK_Y( control2, user->bbox ) )
+      BBox_Cubic_Check( user->last.y,
+                        control1->y,
+                        control2->y,
+                        to->y,
+                        &user->bbox.yMin,
+                        &user->bbox.yMax );
+
+    user->last = *to;
+
+    return 0;
+  }
+
+FT_DEFINE_OUTLINE_FUNCS(bbox_interface,
+    (FT_Outline_MoveTo_Func) BBox_Move_To,
+    (FT_Outline_LineTo_Func) BBox_Line_To,
+    (FT_Outline_ConicTo_Func)BBox_Conic_To,
+    (FT_Outline_CubicTo_Func)BBox_Cubic_To,
+    0, 0
+  )
+
+  /* documentation is in ftbbox.h */
+
+  FT_EXPORT_DEF( FT_Error )
+  FT_Outline_Get_BBox( FT_Outline*  outline,
+                       FT_BBox     *abbox )
+  {
+    FT_BBox     cbox = { 0x7FFFFFFF, 0x7FFFFFFF, -0x7FFFFFFF, -0x7FFFFFFF };
+    FT_BBox     bbox = { 0x7FFFFFFF, 0x7FFFFFFF, -0x7FFFFFFF, -0x7FFFFFFF };
+    FT_Vector*  vec;
+    FT_UShort   n;
+
+
+    if ( !abbox )
+      return FT_THROW( Invalid_Argument );
+
+    if ( !outline )
+      return FT_THROW( Invalid_Outline );
+
+    /* if outline is empty, return (0,0,0,0) */
+    if ( outline->n_points == 0 || outline->n_contours <= 0 )
+    {
+      abbox->xMin = abbox->xMax = 0;
+      abbox->yMin = abbox->yMax = 0;
+      return 0;
+    }
+
+    /* We compute the control box as well as the bounding box of  */
+    /* all `on' points in the outline.  Then, if the two boxes    */
+    /* coincide, we exit immediately.                             */
+
+    vec = outline->points;
+
+    for ( n = 0; n < outline->n_points; n++ )
+    {
+      FT_UPDATE_BBOX( vec, cbox);
+
+      if ( FT_CURVE_TAG( outline->tags[n] ) == FT_CURVE_TAG_ON )
+        FT_UPDATE_BBOX( vec, bbox);
+
+      vec++;
+    }
+
+    /* test two boxes for equality */
+    if ( cbox.xMin < bbox.xMin || cbox.xMax > bbox.xMax ||
+         cbox.yMin < bbox.yMin || cbox.yMax > bbox.yMax )
+    {
+      /* the two boxes are different, now walk over the outline to */
+      /* get the Bezier arc extrema.                               */
+
+      FT_Error   error;
+      TBBox_Rec  user;
+
+#ifdef FT_CONFIG_OPTION_PIC
+      FT_Outline_Funcs bbox_interface;
+      Init_Class_bbox_interface(&bbox_interface);
+#endif
+
+      user.bbox = bbox;
+
+      error = FT_Outline_Decompose( outline, &bbox_interface, &user );
+      if ( error )
+        return error;
+
+      *abbox = user.bbox;
+    }
+    else
+      *abbox = bbox;
+
+    return FT_Err_Ok;
+  }
+
+
+/* END */