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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 CC_RESOURCES_PRIORITY_CALCULATOR_H_
#define CC_RESOURCES_PRIORITY_CALCULATOR_H_
#include "base/basictypes.h"
#include "cc/base/cc_export.h"
namespace gfx { class Rect; }
namespace cc {
class CC_EXPORT PriorityCalculator {
public:
PriorityCalculator() {}
static int UIPriority(bool draws_to_root_surface);
static int VisiblePriority(bool draws_to_root_surface);
static int RenderSurfacePriority();
static int LingeringPriority(int previous_priority);
static int PriorityFromDistance(gfx::Rect visible_rect,
gfx::Rect texture_rect,
bool draws_to_root_surface);
static int SmallAnimatedLayerMinPriority();
static int HighestPriority();
static int LowestPriority();
static inline bool priority_is_lower(int a, int b) { return a > b; }
static inline bool priority_is_higher(int a, int b) { return a < b; }
static inline int max_priority(int a, int b) {
return priority_is_higher(a, b) ? a : b;
}
static int AllowNothingCutoff();
static int AllowVisibleOnlyCutoff();
static int AllowVisibleAndNearbyCutoff();
static int AllowEverythingCutoff();
private:
DISALLOW_COPY_AND_ASSIGN(PriorityCalculator);
};
} // namespace cc
#endif // CC_RESOURCES_PRIORITY_CALCULATOR_H_
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