vcl/qt5/QtVirtualDevice.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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   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
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   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 <QtVirtualDevice.hxx>
  21
  22 #include <QtGraphics.hxx>
  23 #include <QtTools.hxx>
  24
  25 #include <QtGui/QImage>
  26
  27 QtVirtualDevice::QtVirtualDevice(double fScale)
  28     : m_fScale(fScale)
  29 {
  30 }
  31
  32 SalGraphics* QtVirtualDevice::AcquireGraphics()
  33 {
  34     assert(m_pImage);
  35     QtGraphics* pGraphics = new QtGraphics(m_pImage.get());
  36     m_aGraphics.push_back(pGraphics);
  37     return pGraphics;
  38 }
  39
  40 void QtVirtualDevice::ReleaseGraphics(SalGraphics* pGraphics)
  41 {
  42     m_aGraphics.erase(
  43         std::remove(m_aGraphics.begin(), m_aGraphics.end(), dynamic_cast<QtGraphics*>(pGraphics)),
  44         m_aGraphics.end());
  45     delete pGraphics;
  46 }
  47
  48 bool QtVirtualDevice::SetSize(tools::Long nNewDX, tools::Long nNewDY)
  49 {
  50     return SetSizeUsingBuffer(nNewDX, nNewDY, nullptr);
  51 }
  52
  53 bool QtVirtualDevice::SetSizeUsingBuffer(tools::Long nNewDX, tools::Long nNewDY, sal_uInt8* pBuffer)
  54 {
  55     if (nNewDX == 0)
  56         nNewDX = 1;
  57     if (nNewDY == 0)
  58         nNewDY = 1;
  59
  60     if (m_pImage && m_aFrameSize.width() == nNewDX && m_aFrameSize.height() == nNewDY)
  61         return true;
  62
  63     m_aFrameSize = QSize(nNewDX, nNewDY);
  64
  65     nNewDX *= m_fScale;
  66     nNewDY *= m_fScale;
  67
  68     if (pBuffer)
  69         m_pImage.reset(new QImage(pBuffer, nNewDX, nNewDY, Qt_DefaultFormat32));
  70     else
  71         m_pImage.reset(new QImage(nNewDX, nNewDY, Qt_DefaultFormat32));
  72
  73     m_pImage->fill(Qt::transparent);
  74     m_pImage->setDevicePixelRatio(m_fScale);
  75
  76     // update device in existing graphics
  77     for (auto pQtGraph : m_aGraphics)
  78         pQtGraph->ChangeQImage(m_pImage.get());
  79
  80     return true;
  81 }
  82
  83 tools::Long QtVirtualDevice::GetWidth() const { return m_pImage ? m_aFrameSize.width() : 0; }
  84
  85 tools::Long QtVirtualDevice::GetHeight() const { return m_pImage ? m_aFrameSize.height() : 0; }
  86
  87 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */