vcl/qt5/Qt5VirtualDevice.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
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   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <Qt5VirtualDevice.hxx>
  21
  22 #include <Qt5Graphics.hxx>
  23 #include <Qt5Tools.hxx>
  24
  25 #include <QtGui/QImage>
  26
  27 Qt5VirtualDevice::Qt5VirtualDevice(DeviceFormat eFormat, double fScale)
  28     : m_eFormat(eFormat)
  29     , m_fScale(fScale)
  30 {
  31 }
  32
  33 SalGraphics* Qt5VirtualDevice::AcquireGraphics()
  34 {
  35     assert(m_pImage);
  36     Qt5Graphics* pGraphics = new Qt5Graphics(m_pImage.get());
  37     m_aGraphics.push_back(pGraphics);
  38     return pGraphics;
  39 }
  40
  41 void Qt5VirtualDevice::ReleaseGraphics(SalGraphics* pGraphics)
  42 {
  43     m_aGraphics.erase(
  44         std::remove(m_aGraphics.begin(), m_aGraphics.end(), dynamic_cast<Qt5Graphics*>(pGraphics)),
  45         m_aGraphics.end());
  46     delete pGraphics;
  47 }
  48
  49 bool Qt5VirtualDevice::SetSize(tools::Long nNewDX, tools::Long nNewDY)
  50 {
  51     return SetSizeUsingBuffer(nNewDX, nNewDY, nullptr);
  52 }
  53
  54 bool Qt5VirtualDevice::SetSizeUsingBuffer(tools::Long nNewDX, tools::Long nNewDY,
  55                                           sal_uInt8* pBuffer)
  56 {
  57     if (nNewDX == 0)
  58         nNewDX = 1;
  59     if (nNewDY == 0)
  60         nNewDY = 1;
  61
  62     if (m_pImage && m_aFrameSize.width() == nNewDX && m_aFrameSize.height() == nNewDY)
  63         return true;
  64
  65     m_aFrameSize = QSize(nNewDX, nNewDY);
  66
  67     nNewDX *= m_fScale;
  68     nNewDY *= m_fScale;
  69
  70     if (m_eFormat == DeviceFormat::BITMASK)
  71     {
  72         m_pImage.reset(new QImage(nNewDX, nNewDY, QImage::Format_Mono));
  73     }
  74     else
  75     {
  76         if (pBuffer)
  77             m_pImage.reset(new QImage(pBuffer, nNewDX, nNewDY, Qt5_DefaultFormat32));
  78         else
  79             m_pImage.reset(new QImage(nNewDX, nNewDY, Qt5_DefaultFormat32));
  80     }
  81
  82     m_pImage->fill(Qt::transparent);
  83     m_pImage->setDevicePixelRatio(m_fScale);
  84
  85     // update device in existing graphics
  86     for (auto pQt5Graph : m_aGraphics)
  87         pQt5Graph->ChangeQImage(m_pImage.get());
  88
  89     return true;
  90 }
  91
  92 tools::Long Qt5VirtualDevice::GetWidth() const { return m_pImage ? m_aFrameSize.width() : 0; }
  93
  94 tools::Long Qt5VirtualDevice::GetHeight() const { return m_pImage ? m_aFrameSize.height() : 0; }
  95
  96 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */