move some headers out of public

include/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
-
-#include "SkRect.h"
-#include "SkPoint.h"
-
-class SkLineClipper {
-public:
-    enum {
-        kMaxPoints = 4,
-        kMaxClippedLineSegments = kMaxPoints - 1
-    };
-
-    /*  Clip the line pts[0]...pts[1] against clip, ignoring segments that
-        lie completely above or below the clip. For portions to the left or
-        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]);
-
-    /*  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