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0b629d419f
Now that the compositor doesn't have any tricky deps, we can make it a top-level project, which saves a bunch of typing.
80 lines
2.4 KiB
C++
80 lines
2.4 KiB
C++
// Copyright 2015 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include <string>
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#include <iostream>
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#include <iomanip>
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#include "flow/performance_overlay_layer.h"
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namespace flow {
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PerformanceOverlayLayer::PerformanceOverlayLayer(uint64_t enabledOptions)
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: options_(enabledOptions) {
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}
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static void DrawStatisticsText(SkCanvas& canvas,
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const std::string& string,
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int x,
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int y) {
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SkPaint paint;
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paint.setTextSize(14);
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paint.setLinearText(false);
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paint.setColor(SK_ColorRED);
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canvas.drawText(string.c_str(), string.size(), x, y, paint);
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}
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static void VisualizeStopWatch(SkCanvas& canvas,
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const instrumentation::Stopwatch& stopwatch,
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SkScalar width,
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bool show_graph,
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bool show_labels,
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std::string label_prefix) {
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const int x = 8;
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const int y = 70;
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const int height = 80;
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if (show_graph) {
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SkRect visualizationRect = SkRect::MakeWH(width, height);
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stopwatch.visualize(canvas, visualizationRect);
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}
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if (show_labels) {
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double msPerFrame = stopwatch.lastLap().InMillisecondsF();
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double fps = 1e3 / msPerFrame;
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std::stringstream stream;
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stream.setf(std::ios::fixed | std::ios::showpoint);
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stream << std::setprecision(2);
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stream << label_prefix << " " << fps << " FPS | " << msPerFrame
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<< "ms/frame";
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DrawStatisticsText(canvas, stream.str(), x, y);
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}
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if (show_labels || show_graph) {
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canvas.translate(0, height);
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}
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}
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void PerformanceOverlayLayer::Paint(PaintContext::ScopedFrame& frame) {
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if (!options_) {
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return;
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}
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SkScalar width = has_paint_bounds() ? paint_bounds().width() : 0;
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SkAutoCanvasRestore save(&frame.canvas(), true);
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VisualizeStopWatch(frame.canvas(), frame.context().frame_time(), width,
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options_ & kVisualizeRasterizerStatistics,
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options_ & kDisplayRasterizerStatistics,
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"Rasterizer");
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VisualizeStopWatch(frame.canvas(), frame.context().engine_time(), width,
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options_ & kVisualizeEngineStatistics,
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options_ & kDisplayEngineStatistics,
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"Engine");
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}
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} // namespace flow
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