git.iko.soy/unity8
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unity8/plugins/ScreenGrabber/screengrabber.cpp
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1/*
2 * Copyright (C) 2014-2015 Canonical, Ltd.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; version 3.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this program. If not, see <http://www.gnu.org/licenses/>.
15 */
17#include "screengrabber.h"
19#include <QDir>
20#include <QDateTime>
21#include <QStandardPaths>
22#include <QtGui/QImage>
23#include <QtGui/QGuiApplication>
24#include <QtQuick/QQuickWindow>
25#include <QtConcurrent/QtConcurrentRun>
27#include <QDebug>
29bool saveScreenshot(const QImage &screenshot, const QString &filename, const QString &format, int quality)
31 if (!screenshot.save(filename, format.toLatin1().data(), quality)) {
32 qWarning() << "ScreenGrabber: failed to save snapshot!";
33 return false;
34 }
36 return true;
39ScreenGrabber::ScreenGrabber(QObject *parent)
40 : QObject(parent)
42 QDir screenshotsDir;
43 if (qEnvironmentVariableIsSet("UNITY_TESTING")) {
44 qDebug() << "Using test environment";
45 QStandardPaths::setTestModeEnabled(true);
46 screenshotsDir = QStandardPaths::writableLocation(QStandardPaths::DataLocation);
47 } else {
48 qDebug() << "Using real environment";
49 screenshotsDir = QStandardPaths::writableLocation(QStandardPaths::PicturesLocation);
50 }
51 screenshotsDir.mkpath("Screenshots");
52 screenshotsDir.cd("Screenshots");
53 if (screenshotsDir.exists()) {
54 fileNamePrefix = screenshotsDir.absolutePath();
55 fileNamePrefix.append("/screenshot");
56 } else {
57 qWarning() << "ScreenGrabber: failed to create directory at: " << screenshotsDir.absolutePath();
58 }
61void ScreenGrabber::captureAndSave()
63 if (fileNamePrefix.isEmpty())
64 {
65 qWarning() << "ScreenShotter: no directory to save screenshot";
66 return;
67 }
69 const QWindowList windows = QGuiApplication::topLevelWindows();
70 if (windows.empty())
71 {
72 qWarning() << "ScreenShotter: no top level windows found!";
73 return;
74 }
76 QQuickWindow *main_window = qobject_cast<QQuickWindow *>(windows[0]);
77 if (!main_window)
78 {
79 qWarning() << "ScreenShotter: can only take screenshots of QQuickWindows";
80 return;
81 }
83 const QImage screenshot = main_window->grabWindow();
84 const QString filename = makeFileName();
85 qDebug() << "Saving screenshot to" << filename;
86 auto saveOp = QtConcurrent::run(saveScreenshot, screenshot, filename, getFormat(), screenshotQuality);
87 if (saveOp.result()) {
88 Q_EMIT screenshotSaved(filename);
89 }
92QString ScreenGrabber::makeFileName() const
94 QString fileName(fileNamePrefix);
95 fileName.append(QDateTime::currentDateTime().toString("yyyyMMdd_hhmmsszzz"));
96 fileName.append(".");
97 fileName.append(getFormat());
98 return fileName;
101QString ScreenGrabber::getFormat() const
103 //TODO: This should be configurable (perhaps through gsettings?)
104 return "png";