Delete SkPageFlipper

include/images/SkPageFlipper.h

-
-/*
- * Copyright 2008 The Android Open Source Project
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-
-#ifndef SkPageFlipper_DEFINED
-#define SkPageFlipper_DEFINED
-
-#include "SkRegion.h"
-
-/** SkPageFlipper manages alternating inval/dirty regions for a rectangular area
-    (like a bitmap). You call inval() to accumulate inval areas, and then when
-    you're ready to "flip" pages (i.e. draw into the one you've been
-    invalidating) you call update, which swaps the inval regions, and returns
-    two things to you: 1) the final inval region to be drawn into, and 2) the
-    region of pixels that should be copied from the "front" page onto the one
-    you're about to draw into. This copyBits region will be disjoint from the
-    inval region, so both need to be handled.
- */
-class SkPageFlipper {
-public:
-    SkPageFlipper();
-    SkPageFlipper(int width, int height);
-
-    int width() const { return fWidth; }
-    int height() const { return fHeight; }
-
-    void resize(int width, int height);
-
-    bool isDirty() const { return !fDirty1->isEmpty(); }
-    const SkRegion& dirtyRgn() const { return *fDirty1; }
-
-    void inval();
-    void inval(const SkIRect&);
-    void inval(const SkRegion&);
-    void inval(const SkRect&, bool antialias);
-
-    /** When you're ready to write to the back page, call update. The returned
-        region is the invalidate are that needs to be drawn to. The copyBits
-        region (provided by the caller) is the area that should be copied from
-        the front page to the back page (will not intersect with the returned
-        inval region.
-
-        Once this is called, the two internal regions are swapped, so the *new*
-        back inval region is ready to receive new inval calls.
-     */
-    const SkRegion& update(SkRegion* copyBits);
-
-private:
-    SkRegion*   fDirty0;
-    SkRegion*   fDirty1;
-    SkRegion    fDirty0Storage;
-    SkRegion    fDirty1Storage;
-    int         fWidth;
-    int         fHeight;
-};
-
-#endif