1 files changed, 229 insertions, 0 deletions
diff --git a/src/plugins/platforms/offscreen/qoffscreencommon.cpp b/src/plugins/platforms/offscreen/qoffscreencommon.cpp
new file mode 100644
index 0000000000..069b20693d
--- /dev/null
+++ b/src/plugins/platforms/offscreen/qoffscreencommon.cpp
@@ -0,0 +1,229 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the plugins of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qoffscreencommon.h"
+#include "qoffscreenwindow.h"
+
+#include <QtGui/private/qpixmap_raster_p.h>
+#include <QtGui/private/qguiapplication_p.h>
+
+#include <qpa/qplatformcursor.h>
+#include <qpa/qplatformwindow.h>
+
+QT_BEGIN_NAMESPACE
+
+QPlatformWindow *QOffscreenScreen::windowContainingCursor = 0;
+
+class QOffscreenCursor : public QPlatformCursor
+{
+public:
+    QOffscreenCursor() : m_pos(10, 10) {}
+
+    QPoint pos() const { return m_pos; }
+    void setPos(const QPoint &pos)
+    {
+        m_pos = pos;
+        QWindowList wl = QGuiApplication::topLevelWindows();
+        QWindow *containing = 0;
+        foreach (QWindow *w, wl) {
+            if (w->type() != Qt::Desktop && w->isExposed() && w->geometry().contains(pos)) {
+                containing = w;
+                break;
+            }
+        }
+
+        QPoint local = pos;
+        if (containing)
+            local -= containing->position();
+
+        QWindow *previous = QOffscreenScreen::windowContainingCursor ? QOffscreenScreen::windowContainingCursor->window() : 0;
+
+        if (containing != previous)
+            QWindowSystemInterface::handleEnterLeaveEvent(containing, previous, local, pos);
+
+        QWindowSystemInterface::handleMouseEvent(containing, local, pos, QGuiApplication::mouseButtons(), QGuiApplication::keyboardModifiers());
+
+        QOffscreenScreen::windowContainingCursor = containing ? containing->handle() : 0;
+    }
+
+    void changeCursor(QCursor *windowCursor, QWindow *window)
+    {
+        Q_UNUSED(windowCursor);
+        Q_UNUSED(window);
+    }
+
+private:
+    QPoint m_pos;
+};
+
+QOffscreenScreen::QOffscreenScreen()
+    : m_geometry(0, 0, 800, 600)
+    , m_cursor(new QOffscreenCursor)
+{
+}
+
+QPixmap QOffscreenScreen::grabWindow(WId id, int x, int y, int width, int height) const
+{
+    QRect rect(x, y, width, height);
+
+    QOffscreenWindow *window = QOffscreenWindow::windowForWinId(id);
+    if (!window || window->window()->type() == Qt::Desktop) {
+        QWindowList wl = QGuiApplication::topLevelWindows();
+        QWindow *containing = 0;
+        foreach (QWindow *w, wl) {
+            if (w->type() != Qt::Desktop && w->isExposed() && w->geometry().contains(rect)) {
+                containing = w;
+                break;
+            }
+        }
+
+        if (!containing)
+            return QPixmap();
+
+        id = containing->winId();
+        rect = rect.translated(-containing->geometry().topLeft());
+    }
+
+    QOffscreenBackingStore *store = QOffscreenBackingStore::backingStoreForWinId(id);
+    if (store)
+        return store->grabWindow(id, rect);
+    return QPixmap();
+}
+
+QOffscreenBackingStore::QOffscreenBackingStore(QWindow *window)
+    : QPlatformBackingStore(window)
+{
+}
+
+QOffscreenBackingStore::~QOffscreenBackingStore()
+{
+    clearHash();
+}
+
+QPaintDevice *QOffscreenBackingStore::paintDevice()
+{
+    return &m_image;
+}
+
+void QOffscreenBackingStore::flush(QWindow *window, const QRegion &region, const QPoint &offset)
+{
+    Q_UNUSED(region);
+
+    if (m_image.size().isEmpty())
+        return;
+
+    QSize imageSize = m_image.size();
+
+    QRegion clipped = QRect(0, 0, window->width(), window->height());
+    clipped &= QRect(0, 0, imageSize.width(), imageSize.height()).translated(-offset);
+
+    QRect bounds = clipped.boundingRect().translated(offset);
+
+    if (bounds.isNull())
+        return;
+
+    WId id = window->winId();
+
+    m_windowAreaHash[id] = bounds;
+    m_backingStoreForWinIdHash[id] = this;
+}
+
+void QOffscreenBackingStore::resize(const QSize &size, const QRegion &)
+{
+    QImage::Format format = QGuiApplication::primaryScreen()->handle()->format();
+    if (m_image.size() != size)
+        m_image = QImage(size, format);
+    clearHash();
+}
+
+extern void qt_scrollRectInImage(QImage &img, const QRect &rect, const QPoint &offset);
+
+bool QOffscreenBackingStore::scroll(const QRegion &area, int dx, int dy)
+{
+    if (m_image.isNull())
+        return false;
+
+    const QVector<QRect> rects = area.rects();
+    for (int i = 0; i < rects.size(); ++i)
+        qt_scrollRectInImage(m_image, rects.at(i), QPoint(dx, dy));
+
+    return true;
+}
+
+QPixmap QOffscreenBackingStore::grabWindow(WId window, const QRect &rect) const
+{
+    QRect area = m_windowAreaHash.value(window, QRect());
+    if (area.isNull())
+        return QPixmap();
+
+    QRect adjusted = rect;
+    if (adjusted.width() <= 0)
+        adjusted.setWidth(area.width());
+    if (adjusted.height() <= 0)
+        adjusted.setHeight(area.height());
+
+    adjusted = adjusted.translated(area.topLeft()) & area;
+
+    if (adjusted.isEmpty())
+        return QPixmap();
+
+    return QPixmap::fromImage(m_image.copy(adjusted));
+}
+
+QOffscreenBackingStore *QOffscreenBackingStore::backingStoreForWinId(WId id)
+{
+    return m_backingStoreForWinIdHash.value(id, 0);
+}
+
+void QOffscreenBackingStore::clearHash()
+{
+    QList<WId> ids = m_windowAreaHash.keys();
+    foreach (WId id, ids) {
+        QHash<WId, QOffscreenBackingStore *>::iterator it = m_backingStoreForWinIdHash.find(id);
+        if (it.value() == this)
+            m_backingStoreForWinIdHash.remove(id);
+    }
+    m_windowAreaHash.clear();
+}
+
+QHash<WId, QOffscreenBackingStore *> QOffscreenBackingStore::m_backingStoreForWinIdHash;
+
+QT_END_NAMESPACE