sitecapture: Headlessly loads a web page and renders to an image.

sitecapture/sitecapture.cpp

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+/*
+Copyright (c) 2010 Sencha Inc.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+*/
+
+#include <QtGui>
+#include <QtWebKit>
+#include <iostream>
+
+class SiteCapture: public QObject
+{
+    Q_OBJECT
+public:
+    SiteCapture();
+    void load(const QUrl &url, const QString &outputFileName, int width);
+signals:
+    void finished();
+private slots:
+    void saveResult(bool ok);
+private:
+    QWebPage m_page;
+    QString m_fileName;
+    QImage m_image;
+    int m_width;
+};
+
+SiteCapture::SiteCapture()
+    : QObject()
+{
+    connect(&m_page, SIGNAL(loadFinished(bool)), this, SLOT(saveResult(bool)));
+}
+
+void SiteCapture::load(const QUrl &url, const QString &outputFileName, int width)
+{
+    m_fileName = outputFileName;
+    m_image = QImage();
+    m_width = width;
+    m_page.mainFrame()->load(url);
+    m_page.setPreferredContentsSize(QSize(m_width, m_width * 3 / 4));
+}
+
+void SiteCapture::saveResult(bool ok)
+{
+    if (!ok) {
+        std::cerr << "Failed loading " << qPrintable(m_page.mainFrame()->url().toString()) << std::endl;
+        emit finished();
+        return;
+    }
+
+    QSize size = m_page.mainFrame()->contentsSize();
+    m_image = QImage(size, QImage::Format_ARGB32_Premultiplied);
+    m_image.fill(Qt::transparent);
+
+    QPainter p(&m_image);
+    p.setRenderHint(QPainter::Antialiasing, true);
+    p.setRenderHint(QPainter::SmoothPixmapTransform, true);
+    m_page.setViewportSize(m_page.mainFrame()->contentsSize());
+    m_page.mainFrame()->render(&p);
+    p.end();
+
+    if (m_image.save(m_fileName, "png"))
+        std::cout << "Result saved to " << qPrintable(m_fileName) << std::endl;
+    else
+        std::cout << "Failed to save to " << qPrintable(m_fileName) << std::endl;
+
+    emit finished();
+}
+
+#include "sitecapture.moc"
+
+int main(int argc, char * argv[])
+{
+    if (argc != 4) {
+        std::cout << "Capture a web site and save it to an image file" << std::endl << std::endl;
+        std::cout << "  sitecapture url outputfile width" << std::endl << std::endl;
+        std::cout << "Examples: " << std::endl;
+        std::cout << "  sitecapture www.google.com google.png 1024" << std::endl;
+        std::cout << std::endl;
+        return 0;
+    }
+
+    QApplication a(argc, argv);
+    QUrl url = QUrl::fromUserInput(argv[1]);
+    QString fileName = QString::fromLocal8Bit(argv[2]);
+    int width = QString::fromLatin1(argv[3]).toInt();
+
+    SiteCapture capture;
+    QObject::connect(&capture, SIGNAL(finished()), QApplication::instance(), SLOT(quit()));
+    capture.load(url, fileName, width);
+
+    return a.exec();
+}
+

sitecapture/sitecapture.pro

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+TEMPLATE = app
+TARGET = sitecapture
+SOURCES = sitecapture.cpp
+QT += webkit network