blob: 680873c5cab3fa6182b9574af56049c90a1bfae5 [file] [log] [blame]
// Copyright 2013 The Flutter 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 "flutter/flow/layers/performance_overlay_layer.h"
#include <iomanip>
#include <iostream>
#include <string>
#include "third_party/skia/include/core/SkFont.h"
#include "third_party/skia/include/core/SkTextBlob.h"
namespace flutter {
namespace {
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 std::string& font_path) {
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) {
auto text = PerformanceOverlayLayer::MakeStatisticsText(
stopwatch, label_prefix, font_path);
SkPaint paint;
paint.setColor(SK_ColorGRAY);
canvas->drawTextBlob(text, x + label_x, y + height + label_y, paint);
}
}
} // namespace
sk_sp<SkTextBlob> PerformanceOverlayLayer::MakeStatisticsText(
const Stopwatch& stopwatch,
const std::string& label_prefix,
const std::string& font_path) {
SkFont font;
if (font_path != "") {
font = SkFont(SkTypeface::MakeFromFile(font_path.c_str()));
}
font.setSize(15);
double max_ms_per_frame = stopwatch.MaxDelta().ToMillisecondsF();
double average_ms_per_frame = stopwatch.AverageDelta().ToMillisecondsF();
std::stringstream stream;
stream.setf(std::ios::fixed | std::ios::showpoint);
stream << std::setprecision(1);
stream << label_prefix << " "
<< "max " << max_ms_per_frame << " ms/frame, "
<< "avg " << average_ms_per_frame << " ms/frame";
auto text = stream.str();
return SkTextBlob::MakeFromText(text.c_str(), text.size(), font,
SkTextEncoding::kUTF8);
}
PerformanceOverlayLayer::PerformanceOverlayLayer(uint64_t options,
const char* font_path)
: options_(options) {
if (font_path != nullptr) {
font_path_ = font_path;
}
}
void PerformanceOverlayLayer::Diff(DiffContext* context,
const Layer* old_layer) {
DiffContext::AutoSubtreeRestore subtree(context);
if (!context->IsSubtreeDirty()) {
FML_DCHECK(old_layer);
auto prev = old_layer->as_performance_overlay_layer();
context->MarkSubtreeDirty(context->GetOldLayerPaintRegion(prev));
}
context->AddLayerBounds(paint_bounds());
context->SetLayerPaintRegion(this, context->CurrentSubtreeRegion());
}
void PerformanceOverlayLayer::Paint(PaintContext& context) const {
const int padding = 8;
if (!options_) {
return;
}
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;
auto mutator = context.state_stack.save();
VisualizeStopWatch(
context.canvas, context.raster_time, x, y, width, height - padding,
options_ & kVisualizeRasterizerStatistics,
options_ & kDisplayRasterizerStatistics, "Raster", font_path_);
VisualizeStopWatch(context.canvas, context.ui_time, x, y + height, width,
height - padding, options_ & kVisualizeEngineStatistics,
options_ & kDisplayEngineStatistics, "UI", font_path_);
}
} // namespace flutter