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// Copyright (c) 2012 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 UI_GFX_SWAP_RESULT_H_
#define UI_GFX_SWAP_RESULT_H_
#include "base/time/time.h"
namespace gfx {
enum class SwapResult {
SWAP_ACK,
SWAP_FAILED,
SWAP_NAK_RECREATE_BUFFERS,
SWAP_RESULT_LAST = SWAP_NAK_RECREATE_BUFFERS,
};
// Sent by ImageTransportSurfaces to their clients in response to a SwapBuffers.
struct SwapResponse {
// The swap's sequence id which helps clients determine which SwapBuffers
// this corresponds to. We may receive responses out of order on platforms
// that allow multiple swaps pending if a failed swap returns immediately
// while a successful swap is still outstanding.
uint64_t swap_id;
// Indicates whether the swap succeeded or not.
SwapResult result;
// When the GPU service first started processing the SwapBuffers request.
base::TimeTicks swap_start;
// On most platforms, this is when the GPU service finished processing the
// SwapBuffers request. On ChromeOS, this corresponds to the present time.
// TODO(brianderson): Differentiate the concepts without introducing
// dicontinuities in associated UMA data.
base::TimeTicks swap_end;
};
} // namespace gfx
#endif // UI_GFX_SWAP_RESULT_H_
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