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// Copyright 2012 The Chromium Authors
// 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 <memory>
#include "base/component_export.h"
#include "base/time/time.h"
#include "ui/gfx/gpu_fence_handle.h"
namespace gfx {
struct CALayerParams;
enum class SwapResult {
SWAP_ACK,
SWAP_FAILED,
// Typically, the Viz thread should decide whether to skip a swap based off
// the damage. In rare cases, however, the GPU main thread might skip the
// swap after the Viz thread requests it (e.g. the Viz thread might not know
// that the buffers are not fully initialized yet). For the purposes of
// metrics bookkeeping, we label this scenario as SWAP_SKIPPED and treat it
// much like we do a SWAP_FAILED (e.g. failed PresentationFeedback).
// TODO(https://crbug.com/1226090): Consider more explicit handling of
// SWAP_SKIPPED.
SWAP_SKIPPED,
SWAP_NAK_RECREATE_BUFFERS,
// This swap result identifies cases when flipping non-simple overlay planes
// fails.
SWAP_NON_SIMPLE_OVERLAYS_FAILED,
SWAP_RESULT_LAST = SWAP_NON_SIMPLE_OVERLAYS_FAILED,
};
struct SwapTimings {
// 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;
// When Display Compositor thread scheduled work to GPU Thread. For
// SkiaRenderer it's PostTask time for FinishPaintRenderPass or SwapBuffers
// whichever comes first.
base::TimeTicks viz_scheduled_draw;
// When GPU thread started draw submitted by Display Compositor thread. For
// SkiaRenderer it's FinishPaintRenderPass/SwapBuffers.
base::TimeTicks gpu_started_draw;
// When GPU scheduler removed the last required dependency.
base::TimeTicks gpu_task_ready;
bool is_null() const { return swap_start.is_null() && swap_end.is_null(); }
};
// 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.
// TODO(crbug.com/40597949): It may be more reasonable to add
// a full SwapCompletionResult as a member.
SwapResult result;
// Timing information about the given swap.
SwapTimings timings;
};
// Sent as part of finishing a swap.
struct COMPONENT_EXPORT(GFX) SwapCompletionResult {
explicit SwapCompletionResult(gfx::SwapResult swap_result);
SwapCompletionResult(gfx::SwapResult swap_result,
gfx::GpuFenceHandle release_fence);
SwapCompletionResult(gfx::SwapResult swap_result,
std::unique_ptr<gfx::CALayerParams> ca_layer_params);
SwapCompletionResult(SwapCompletionResult&& other);
~SwapCompletionResult();
SwapCompletionResult(const SwapCompletionResult& other) = delete;
SwapCompletionResult& operator=(const SwapCompletionResult other) = delete;
gfx::SwapResult swap_result = SwapResult::SWAP_FAILED;
gfx::GpuFenceHandle release_fence;
std::unique_ptr<CALayerParams> ca_layer_params;
};
} // namespace gfx
#endif // UI_GFX_SWAP_RESULT_H_
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