1 files changed, 85 insertions, 0 deletions
diff --git a/vcl/qt5/QtVirtualDevice.cxx b/vcl/qt5/QtVirtualDevice.cxx
new file mode 100644
index 0000000000..22844f1df6
--- /dev/null
+++ b/vcl/qt5/QtVirtualDevice.cxx
@@ -0,0 +1,85 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <QtVirtualDevice.hxx>
+
+#include <QtGraphics.hxx>
+#include <QtTools.hxx>
+
+#include <QtGui/QImage>
+
+QtVirtualDevice::QtVirtualDevice(double fScale)
+    : m_fScale(fScale)
+{
+}
+
+SalGraphics* QtVirtualDevice::AcquireGraphics()
+{
+    assert(m_pImage);
+    QtGraphics* pGraphics = new QtGraphics(m_pImage.get());
+    m_aGraphics.push_back(pGraphics);
+    return pGraphics;
+}
+
+void QtVirtualDevice::ReleaseGraphics(SalGraphics* pGraphics)
+{
+    std::erase(m_aGraphics, dynamic_cast<QtGraphics*>(pGraphics));
+    delete pGraphics;
+}
+
+bool QtVirtualDevice::SetSize(tools::Long nNewDX, tools::Long nNewDY)
+{
+    return SetSizeUsingBuffer(nNewDX, nNewDY, nullptr);
+}
+
+bool QtVirtualDevice::SetSizeUsingBuffer(tools::Long nNewDX, tools::Long nNewDY, sal_uInt8* pBuffer)
+{
+    if (nNewDX == 0)
+        nNewDX = 1;
+    if (nNewDY == 0)
+        nNewDY = 1;
+
+    if (m_pImage && m_aFrameSize.width() == nNewDX && m_aFrameSize.height() == nNewDY)
+        return true;
+
+    m_aFrameSize = QSize(nNewDX, nNewDY);
+
+    nNewDX *= m_fScale;
+    nNewDY *= m_fScale;
+
+    if (pBuffer)
+        m_pImage.reset(new QImage(pBuffer, nNewDX, nNewDY, Qt_DefaultFormat32));
+    else
+        m_pImage.reset(new QImage(nNewDX, nNewDY, Qt_DefaultFormat32));
+
+    m_pImage->fill(Qt::transparent);
+    m_pImage->setDevicePixelRatio(m_fScale);
+
+    // update device in existing graphics
+    for (auto pQtGraph : m_aGraphics)
+        pQtGraph->ChangeQImage(m_pImage.get());
+
+    return true;
+}
+
+tools::Long QtVirtualDevice::GetWidth() const { return m_pImage ? m_aFrameSize.width() : 0; }
+
+tools::Long QtVirtualDevice::GetHeight() const { return m_pImage ? m_aFrameSize.height() : 0; }
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */