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// Copyright 2010 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 CCPriorityCalculator_h
#define CCPriorityCalculator_h
#include "GraphicsContext3D.h"
#include "IntRect.h"
#include "IntSize.h"
namespace WebCore {
class CCPriorityCalculator {
public:
static int uiPriority(bool drawsToRootSurface);
static int visiblePriority(bool drawsToRootSurface);
static int renderSurfacePriority();
static int lingeringPriority(int previousPriority);
int priorityFromDistance(const IntRect& visibleRect, const IntRect& textureRect, bool drawsToRootSurface) const;
int priorityFromDistance(unsigned pixels, bool drawsToRootSurface) const;
int priorityFromVisibility(bool visible, bool drawsToRootSurface) const;
static inline int highestPriority() { return std::numeric_limits<int>::min(); }
static inline int lowestPriority() { return std::numeric_limits<int>::max(); }
static inline bool priorityIsLower(int a, int b) { return a > b; }
static inline bool priorityIsHigher(int a, int b) { return a < b; }
static inline bool maxPriority(int a, int b) { return priorityIsHigher(a, b) ? a : b; }
};
}
#endif
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