modules/sksg/include/SkSGInvalidationController.h

/*
 * Copyright 2017 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#ifndef SkSGInvalidationController_DEFINED
#define SkSGInvalidationController_DEFINED

#include "include/core/SkMatrix.h"
#include "include/core/SkTypes.h"
#include "include/private/SkTDArray.h"

struct SkRect;

namespace sksg {

/**
 * Receiver for invalidation events.
 *
 * Tracks dirty regions for repaint.
 */
class InvalidationController {
public:
    InvalidationController();
    InvalidationController(const InvalidationController&) = delete;
    InvalidationController& operator=(const InvalidationController&) = delete;

    void inval(const SkRect&, const SkMatrix& ctm = SkMatrix::I());

    const SkRect& bounds() const { return fBounds;        }
    const SkRect*  begin() const { return fRects.begin(); }
    const SkRect*    end() const { return fRects.end();   }

    void reset();

private:
    SkTDArray<SkRect> fRects;
    SkRect            fBounds;
};

} // namespace sksg

#endif // SkSGInvalidationController_DEFINED