libreoffice/vcl/qt5/Qt5VirtualDevice.cxx

/* -*- 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 "Qt5VirtualDevice.hxx"

#include "Qt5Graphics.hxx"

#include <QtGui/QImage>

Qt5VirtualDevice::Qt5VirtualDevice( DeviceFormat eFormat, double fScale )
    : m_eFormat( eFormat )
    , m_fScale( fScale )
{
}

Qt5VirtualDevice::~Qt5VirtualDevice()
{
}

SalGraphics* Qt5VirtualDevice::AcquireGraphics()
{
    assert( m_pImage );
    Qt5Graphics* pGraphics = new Qt5Graphics( m_pImage.get() );
    m_aGraphics.push_back( pGraphics );
    return pGraphics;
}

void Qt5VirtualDevice::ReleaseGraphics( SalGraphics* pGraphics )
{
    m_aGraphics.remove( dynamic_cast<Qt5Graphics*>( pGraphics ) );
    delete pGraphics;
}

bool Qt5VirtualDevice::SetSize( long nNewDX, long nNewDY )
{
    return SetSizeUsingBuffer( nNewDX, nNewDY, nullptr );
}

bool Qt5VirtualDevice::SetSizeUsingBuffer( long nNewDX, long nNewDY,
                                           sal_uInt8 * pBuffer )
{
    if( nNewDX == 0 )
        nNewDX = 1;
    if( nNewDY == 0 )
        nNewDY = 1;

    if( m_pImage && m_aFrameSize.getX() != nNewDX
                  && m_aFrameSize.getY() != nNewDY )
        return true;

    m_aFrameSize = basegfx::B2IVector( nNewDX, nNewDY );

    nNewDX *= m_fScale;
    nNewDY *= m_fScale;

    if (m_eFormat == DeviceFormat::BITMASK)
    {
        m_pImage.reset( new QImage( nNewDX, nNewDY, QImage::Format_Mono ) );
    }
    else
    {
        if ( pBuffer )
            m_pImage.reset( new QImage( pBuffer, nNewDX, nNewDY, QImage::Format_ARGB32 ) );
        else
            m_pImage.reset( new QImage( nNewDX, nNewDY, QImage::Format_ARGB32 ) );
    }

    m_pImage->setDevicePixelRatio( m_fScale );

    // update device in existing graphics
    for( auto pQt5Graph : m_aGraphics )
        pQt5Graph->ChangeQImage( m_pImage.get() );

    return true;
}

long Qt5VirtualDevice::GetWidth() const
{
    return m_pImage ? m_aFrameSize.getX() : 0;
}

long Qt5VirtualDevice::GetHeight() const
{
    return m_pImage ? m_aFrameSize.getY() : 0;
}

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