chromium/third_party/blink/renderer/core/html/canvas/canvas_performance_monitor.cc

// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "third_party/blink/renderer/core/html/canvas/canvas_performance_monitor.h"

#include "base/metrics/histogram_functions.h"
#include "base/metrics/histogram_macros.h"
#include "base/trace_event/trace_event.h"
#include "third_party/blink/renderer/core/execution_context/execution_context.h"
#include "third_party/blink/renderer/core/html/canvas/canvas_rendering_context.h"
#include "third_party/blink/renderer/platform/heap/process_heap.h"
#include "third_party/blink/renderer/platform/wtf/bit_field.h"

namespace {

TimeTicks;
CanvasRenderingContext;

const char* const kHostTypeName_Canvas = …;
const char* const kHostTypeName_OffscreenCanvas = …;

const char* const kRenderingAPIName_2D_Accelerated = …;
const char* const kRenderingAPIName_2D_Unaccelerated = …;
const char* const kRenderingAPIName_WebGL = …;
const char* const kRenderingAPIName_WebGL2 = …;
const char* const kRenderingAPIName_WebGPU = …;
const char* const kRenderingAPIName_ImageBitmap = …;

const char* const kFilterName_All = …;
const char* const kFilterName_Animation = …;
const char* const kFilterName_Path = …;
const char* const kFilterName_Image = …;
const char* const kFilterName_ImageData = …;
const char* const kFilterName_Rectangle = …;
const char* const kFilterName_Text = …;
const char* const kFilterName_DrawArrays = …;
const char* const kFilterName_DrawElements = …;

const char* const kMeasurementName_RenderTaskDuration = …;
const char* const kMeasurementName_PartitionAlloc = …;
const char* const kMeasurementName_BlinkGC = …;

// The inverse of the probability that a given task will be measured.
// I.e. a value of X means that each task has a probability 1/X of being
// measured.
static constexpr int kSamplingProbabilityInv = …;

// Encodes and decodes information about a CanvasRenderingContext as a
// 32-bit value.
class RenderingContextDescriptionCodec { … };

RenderingContextDescriptionCodec::RenderingContextDescriptionCodec(
    const CanvasRenderingContext* context) { … }

RenderingContextDescriptionCodec::RenderingContextDescriptionCodec(
    const uint32_t& key)
    : … { … }

CanvasRenderingContext::CanvasRenderingAPI
RenderingContextDescriptionCodec::GetRenderingAPI() const { … }

const char* RenderingContextDescriptionCodec::GetHostTypeName() const { … }

const char* RenderingContextDescriptionCodec::GetRenderingAPIName() const { … }

}  // unnamed namespace

namespace blink {

void CanvasPerformanceMonitor::CurrentTaskDrawsToContext(
    CanvasRenderingContext* context) { … }

void CanvasPerformanceMonitor::WillProcessTask(TimeTicks start_time) { … }

void CanvasPerformanceMonitor::RecordMetrics(TimeTicks start_time,
                                             TimeTicks end_time) { … }

void CanvasPerformanceMonitor::DidProcessTask(TimeTicks start_time,
                                              TimeTicks end_time) { … }

void CanvasPerformanceMonitor::ResetForTesting() { … }

}  // namespace blink