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// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_POINT_BUFFER_H__
#define CHROME_BROWSER_POINT_BUFFER_H__
#include <windows.h>
#include "base/basictypes.h"
////////////////////////////////////////////////////////////////////////////////
//
// PointBuffer class
//
// A facility to accumulate 2d points and produce polygon regions.
//
////////////////////////////////////////////////////////////////////////////////
class PointBuffer {
public:
//
// Create an empty path buffer
//
PointBuffer();
~PointBuffer();
//
// Add a point in the buffer
//
void AddPoint(const POINT &p);
void AddPoint(int x, int y);
//
// Return new polygon region matching the current points.
// It is the caller's responsability to delete the returned region by using
// ::DeleteObject()
//
HRGN GetCurrentPolygonRegion() const;
#if 0
void Log();
#endif
private:
//
// Grow the point buffer if we are out of space
//
void GrowPointBufferIfNeeded();
POINT *points_;
int next_;
int max_count_;
DISALLOW_EVIL_CONSTRUCTORS(PointBuffer);
};
#endif // CHROME_BROWSER_PATH_BUFFER_H__
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