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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   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
   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.remove(dynamic_cast<Qt5Graphics*>(pGraphics));
  44     delete pGraphics;
  45 }
  46
  47 bool Qt5VirtualDevice::SetSize(long nNewDX, long nNewDY)
  48 {
  49     return SetSizeUsingBuffer(nNewDX, nNewDY, nullptr);
  50 }
  51
  52 bool Qt5VirtualDevice::SetSizeUsingBuffer(long nNewDX, long nNewDY, sal_uInt8* pBuffer)
  53 {
  54     if (nNewDX == 0)
  55         nNewDX = 1;
  56     if (nNewDY == 0)
  57         nNewDY = 1;
  58
  59     if (m_pImage && m_aFrameSize.width() == nNewDX && m_aFrameSize.height() == nNewDY)
  60         return true;
  61
  62     m_aFrameSize = QSize(nNewDX, nNewDY);
  63
  64     nNewDX *= m_fScale;
  65     nNewDY *= m_fScale;
  66
  67     if (m_eFormat == DeviceFormat::BITMASK)
  68     {
  69         m_pImage.reset(new QImage(nNewDX, nNewDY, QImage::Format_Mono));
  70     }
  71     else
  72     {
  73         if (pBuffer)
  74             m_pImage.reset(new QImage(pBuffer, nNewDX, nNewDY, Qt5_DefaultFormat32));
  75         else
  76             m_pImage.reset(new QImage(nNewDX, nNewDY, Qt5_DefaultFormat32));
  77     }
  78
  79     m_pImage->fill(Qt::transparent);
  80     m_pImage->setDevicePixelRatio(m_fScale);
  81
  82     // update device in existing graphics
  83     for (auto pQt5Graph : m_aGraphics)
  84         pQt5Graph->ChangeQImage(m_pImage.get());
  85
  86     return true;
  87 }
  88
  89 long Qt5VirtualDevice::GetWidth() const { return m_pImage ? m_aFrameSize.width() : 0; }
  90
  91 long Qt5VirtualDevice::GetHeight() const { return m_pImage ? m_aFrameSize.height() : 0; }
  92
  93 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */