mirror of
https://github.com/flutter/flutter.git
synced 2026-02-20 02:29:02 +08:00
58e84c8bf0
* Re-land "Support multiple shells in a single process. (#4932)" This reverts commit 723c7d01439da4261bc836075fb55651ce9e7f03.
89 lines
2.8 KiB
C++
89 lines
2.8 KiB
C++
// Copyright 2015 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.
|
|
|
|
#include <iomanip>
|
|
#include <iostream>
|
|
#include <string>
|
|
|
|
#include "flutter/flow/layers/performance_overlay_layer.h"
|
|
|
|
namespace flow {
|
|
namespace {
|
|
|
|
void DrawStatisticsText(SkCanvas& canvas,
|
|
const std::string& string,
|
|
int x,
|
|
int y) {
|
|
SkPaint paint;
|
|
paint.setTextSize(15);
|
|
paint.setLinearText(false);
|
|
paint.setColor(SK_ColorGRAY);
|
|
canvas.drawText(string.c_str(), string.size(), x, y, paint);
|
|
}
|
|
|
|
void VisualizeStopWatch(SkCanvas& canvas,
|
|
const Stopwatch& stopwatch,
|
|
SkScalar x,
|
|
SkScalar y,
|
|
SkScalar width,
|
|
SkScalar height,
|
|
bool show_graph,
|
|
bool show_labels,
|
|
const std::string& label_prefix) {
|
|
const int label_x = 8; // distance from x
|
|
const int label_y = -10; // distance from y+height
|
|
|
|
if (show_graph) {
|
|
SkRect visualization_rect = SkRect::MakeXYWH(x, y, width, height);
|
|
stopwatch.Visualize(canvas, visualization_rect);
|
|
}
|
|
|
|
if (show_labels) {
|
|
double ms_per_frame = stopwatch.MaxDelta().ToMillisecondsF();
|
|
double fps;
|
|
if (ms_per_frame < kOneFrameMS) {
|
|
fps = 1e3 / kOneFrameMS;
|
|
} else {
|
|
fps = 1e3 / ms_per_frame;
|
|
}
|
|
|
|
std::stringstream stream;
|
|
stream.setf(std::ios::fixed | std::ios::showpoint);
|
|
stream << std::setprecision(1);
|
|
stream << label_prefix << " " << fps << " fps " << ms_per_frame
|
|
<< "ms/frame";
|
|
DrawStatisticsText(canvas, stream.str(), x + label_x, y + height + label_y);
|
|
}
|
|
}
|
|
|
|
} // namespace
|
|
|
|
PerformanceOverlayLayer::PerformanceOverlayLayer(uint64_t options)
|
|
: options_(options) {}
|
|
|
|
void PerformanceOverlayLayer::Paint(PaintContext& context) const {
|
|
const int padding = 8;
|
|
|
|
if (!options_)
|
|
return;
|
|
|
|
TRACE_EVENT0("flutter", "PerformanceOverlayLayer::Paint");
|
|
SkScalar x = paint_bounds().x() + padding;
|
|
SkScalar y = paint_bounds().y() + padding;
|
|
SkScalar width = paint_bounds().width() - (padding * 2);
|
|
SkScalar height = paint_bounds().height() / 2;
|
|
SkAutoCanvasRestore save(&context.canvas, true);
|
|
|
|
VisualizeStopWatch(context.canvas, context.frame_time, x, y, width,
|
|
height - padding,
|
|
options_ & kVisualizeRasterizerStatistics,
|
|
options_ & kDisplayRasterizerStatistics, "GPU");
|
|
|
|
VisualizeStopWatch(context.canvas, context.engine_time, x, y + height, width,
|
|
height - padding, options_ & kVisualizeEngineStatistics,
|
|
options_ & kDisplayEngineStatistics, "UI");
|
|
}
|
|
|
|
} // namespace flow
|