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// Copyright (c) 2014 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 GPU_COMMAND_BUFFER_COMMON_VALUE_STATE_H_
#define GPU_COMMAND_BUFFER_COMMON_VALUE_STATE_H_
#include "base/containers/hash_tables.h"
#include "base/memory/ref_counted.h"
#include "gpu/gpu_export.h"
namespace gpu {
// Used to maintain Valuebuffer state, exposed to browser to
// support passing ValueStates via IPC.
union GPU_EXPORT ValueState {
float float_value[4];
int int_value[4];
};
// Refcounted wrapper for a hash_map of subscription targets to ValueStates
class GPU_EXPORT ValueStateMap : public base::RefCounted<ValueStateMap> {
public:
ValueStateMap();
// Returns NULL if there is not ValueState for the target
const ValueState* GetState(unsigned int target) const;
void UpdateState(unsigned int target, const ValueState& state);
protected:
virtual ~ValueStateMap();
private:
friend class base::RefCounted<ValueStateMap>;
typedef base::hash_map<unsigned int, ValueState> Map;
Map state_map_;
DISALLOW_COPY_AND_ASSIGN(ValueStateMap);
};
} // namespace gpu
#endif // GPU_COMMAND_BUFFER_COMMON_VALUE_STATE_H_
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