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47 lines
1.2 KiB
C++
47 lines
1.2 KiB
C++
// Copyright (c) 2014 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef GPU_COMMAND_BUFFER_COMMON_VALUE_STATE_H_
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#define GPU_COMMAND_BUFFER_COMMON_VALUE_STATE_H_
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#include "base/containers/hash_tables.h"
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#include "base/memory/ref_counted.h"
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#include "gpu/gpu_export.h"
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namespace gpu {
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// Used to maintain Valuebuffer state, exposed to browser to
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// support passing ValueStates via IPC.
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union GPU_EXPORT ValueState {
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float float_value[4];
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int int_value[4];
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};
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// Refcounted wrapper for a hash_map of subscription targets to ValueStates
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class GPU_EXPORT ValueStateMap : public base::RefCounted<ValueStateMap> {
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public:
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ValueStateMap();
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// Returns NULL if there is not ValueState for the target
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const ValueState* GetState(unsigned int target) const;
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void UpdateState(unsigned int target, const ValueState& state);
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protected:
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virtual ~ValueStateMap();
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private:
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friend class base::RefCounted<ValueStateMap>;
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typedef base::hash_map<unsigned int, ValueState> Map;
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Map state_map_;
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DISALLOW_COPY_AND_ASSIGN(ValueStateMap);
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};
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} // namespace gpu
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#endif // GPU_COMMAND_BUFFER_COMMON_VALUE_STATE_H_
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