osu/osu.Game/Graphics/ScreenshotManager.cs

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// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
using System;
using System.Drawing.Imaging;
using System.IO;
using System.Threading;
using System.Threading.Tasks;
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using osu.Framework.Allocation;
using osu.Framework.Audio;
using osu.Framework.Audio.Sample;
using osu.Framework.Configuration;
using osu.Framework.Graphics.Containers;
using osu.Framework.Input;
using osu.Framework.Input.Bindings;
using osu.Framework.Platform;
using osu.Framework.Threading;
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using osu.Game.Configuration;
using osu.Game.Input.Bindings;
using osu.Game.Overlays;
using osu.Game.Overlays.Notifications;
namespace osu.Game.Graphics
{
public class ScreenshotManager : Container, IKeyBindingHandler<GlobalAction>, IHandleGlobalInput
{
private readonly BindableBool cursorVisibility = new BindableBool(true);
/// <summary>
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/// Changed when screenshots are being or have finished being taken, to control whether cursors should be visible.
/// If cursors should not be visible, cursors have 3 frames to hide themselves.
/// </summary>
public IBindable<bool> CursorVisibility => cursorVisibility;
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private Bindable<ScreenshotFormat> screenshotFormat;
private Bindable<bool> captureMenuCursor;
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private GameHost host;
private Storage storage;
private NotificationOverlay notificationOverlay;
private SampleChannel shutter;
[BackgroundDependencyLoader]
private void load(GameHost host, OsuConfigManager config, Storage storage, NotificationOverlay notificationOverlay, AudioManager audio)
{
this.host = host;
this.storage = storage.GetStorageForDirectory(@"screenshots");
this.notificationOverlay = notificationOverlay;
screenshotFormat = config.GetBindable<ScreenshotFormat>(OsuSetting.ScreenshotFormat);
captureMenuCursor = config.GetBindable<bool>(OsuSetting.ScreenshotCaptureMenuCursor);
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shutter = audio.Sample.Get("UI/shutter");
}
public bool OnPressed(GlobalAction action)
{
switch (action)
{
case GlobalAction.TakeScreenshot:
shutter.Play();
TakeScreenshotAsync();
return true;
}
return false;
}
public bool OnReleased(GlobalAction action) => false;
private volatile int screenShotTasks;
public async Task TakeScreenshotAsync() => await Task.Run(async () =>
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{
Interlocked.Increment(ref screenShotTasks);
if (!captureMenuCursor.Value)
{
cursorVisibility.Value = false;
// We need to wait for at most 3 draw nodes to be drawn, following which we can be assured at least one DrawNode has been generated/drawn with the set value
const int frames_to_wait = 3;
int framesWaited = 0;
ScheduledDelegate waitDelegate = host.DrawThread.Scheduler.AddDelayed(() => framesWaited++, 0, true);
while (framesWaited < frames_to_wait)
Thread.Sleep(10);
waitDelegate.Cancel();
}
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using (var bitmap = await host.TakeScreenshotAsync())
{
Interlocked.Decrement(ref screenShotTasks);
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var fileName = getFileName();
if (fileName == null) return;
var stream = storage.GetStream(fileName, FileAccess.Write);
switch (screenshotFormat.Value)
{
case ScreenshotFormat.Png:
bitmap.Save(stream, ImageFormat.Png);
break;
case ScreenshotFormat.Jpg:
bitmap.Save(stream, ImageFormat.Jpeg);
break;
default:
throw new ArgumentOutOfRangeException(nameof(screenshotFormat));
}
notificationOverlay.Post(new SimpleNotification
{
Text = $"{fileName} saved!",
Activated = () =>
{
storage.OpenInNativeExplorer();
return true;
}
});
}
});
protected override void Update()
{
base.Update();
if (cursorVisibility == false && Interlocked.CompareExchange(ref screenShotTasks, 0, 0) == 0)
cursorVisibility.Value = true;
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}
private string getFileName()
{
var dt = DateTime.Now;
var fileExt = screenshotFormat.ToString().ToLower();
var withoutIndex = $"osu_{dt:yyyy-MM-dd_HH-mm-ss}.{fileExt}";
if (!storage.Exists(withoutIndex))
return withoutIndex;
for (ulong i = 1; i < ulong.MaxValue; i++)
{
var indexedName = $"osu_{dt:yyyy-MM-dd_HH-mm-ss}-{i}.{fileExt}";
if (!storage.Exists(indexedName))
return indexedName;
}
return null;
}
}
}