Faster edge re-sort, drop trailing edges

src/core/SkLineClipper.h

 
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #ifndef SkLineClipper_DEFINED
 #define SkLineClipper_DEFINED
 
@@ skipping 12 matching lines @@
         right, turn those into vertical line segments that are aligned to the
         edge of the clip.
 
         Return the number of line segments that result, and store the end-points
         of those segments sequentially in lines as follows:
             1st segment: lines[0]..lines[1]
             2nd segment: lines[1]..lines[2]
             3rd segment: lines[2]..lines[3]
      */
     static int ClipLine(const SkPoint pts[2], const SkRect& clip,
-                        SkPoint lines[kMaxPoints]);
+                        SkPoint lines[kMaxPoints], bool canClipToTheRight);
 
     /*  Intersect the line segment against the rect. If there is a non-empty
         resulting segment, return true and set dst[] to that segment. If not,
         return false and ignore dst[].
 
         ClipLine is specialized for scan-conversion, as it adds vertical
         segments on the sides to show where the line extended beyond the
         left or right sides. IntersectLine does not.
      */
     static bool IntersectLine(const SkPoint src[2], const SkRect& clip,
                               SkPoint dst[2]);
 };
 
 #endif