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/* This file is part of the KDE project
Copyright (c) 2001 Simon Hausmann <hausmann@kde.org>
Copyright (C) 2002, 2003 Nicolas GOUTTE <goutte@kde.org>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "KoPictureImage.h"
#include "KoPictureKey.h"
#include <kdebug.h>
#include <kmimetype.h>
#include <qbuffer.h>
#include <qpainter.h>
#include <qimage.h>
#include <qpixmap.h>
#include <qapplication.h>
#include <qdragobject.h>
KoPictureImage::KoPictureImage(void) : m_cacheIsInFastMode(true)
{
// Forbid QPixmap to cache the X-Window resources (Yes, it is slower!)
m_cachedPixmap.setOptimization(QPixmap::MemoryOptim);
}
KoPictureImage::~KoPictureImage(void)
{
}
KoPictureBase* KoPictureImage::newCopy(void) const
{
return new KoPictureImage(*this);
}
KoPictureType::Type KoPictureImage::getType(void) const
{
return KoPictureType::TypeImage;
}
bool KoPictureImage::isNull(void) const
{
return m_originalImage.isNull();
}
void KoPictureImage::scaleAndCreatePixmap(const QSize& size, bool fastMode)
{
if ((size==m_cachedSize)
&& ((fastMode) || (!m_cacheIsInFastMode)))
{
// The cached pixmap has already the right size
// and:
// - we are in fast mode (We do not care if the re-size was done slowly previously)
// - the re-size was already done in slow mode
return;
}
// Slow mode can be very slow, especially at high zoom levels -> configurable
if ( !isSlowResizeModeAllowed() )
{
kdDebug(30003) << "User has disallowed slow mode!" << endl;
fastMode = true;
}
// Use QImage::scale if we have fastMode==true
if ( fastMode )
{
m_cachedPixmap.convertFromImage(m_originalImage.scale( size ), QPixmap::Color); // Always color or else B/W can be reversed
m_cacheIsInFastMode=true;
}
else
{
m_cachedPixmap.convertFromImage(m_originalImage.smoothScale( size ), QPixmap::Color); // Always color or else B/W can be reversed
m_cacheIsInFastMode=false;
}
m_cachedSize=size;
}
void KoPictureImage::draw(QPainter& painter, int x, int y, int width, int height, int sx, int sy, int sw, int sh, bool fastMode)
{
//kdDebug() << "KoImage::draw currentSize:" << currentSize.width() << "x" << currentSize.height() << endl;
if ( !width || !height )
return;
QSize origSize = getOriginalSize();
const bool scaleImage = painter.device()->isExtDev() // we are printing
&& ((width <= origSize.width()) || (height <= origSize.height()));
if( scaleImage )
{
// use full resolution of image
double xScale = double(width) / double(origSize.width());
double yScale = double(height) / double(origSize.height());
painter.save();
painter.translate( x, y );
painter.scale( xScale, yScale );
// Note that sx, sy, sw and sh are unused in this case. Not a problem, since it's about printing.
// Note 2: we do not cache the QPixmap. As we are printing, the next time we will probably
// need again the screen version.
painter.drawImage(0, 0, m_originalImage);
painter.restore();
}
else
{
QSize screenSize( width, height );
//kdDebug() << "KoPictureImage::draw screenSize=" << screenSize.width() << "x" << screenSize.height() << endl;
scaleAndCreatePixmap(screenSize, fastMode);
// sx,sy,sw,sh is meant to be used as a cliprect on the pixmap, but drawPixmap
// translates it to the (x,y) point -> we need (x+sx, y+sy).
painter.drawPixmap( x + sx, y + sy, m_cachedPixmap, sx, sy, sw, sh );
}
}
bool KoPictureImage::loadData(const QByteArray& array, const QString& /* extension*/ )
{
m_rawData=array;
// Second, create the original image
QBuffer buffer(m_rawData);
buffer.open(IO_ReadWrite);
QImageIO imageIO(&buffer,NULL);
if (!imageIO.read())
{
buffer.close();
kdError(30003) << "Image could not be loaded!" << endl;
return false;
}
buffer.close();
m_originalImage=imageIO.image();
return true;
}
bool KoPictureImage::save(QIODevice* io) const
{
kdDebug() << k_funcinfo << "writing raw data. size=" << m_rawData.size() << endl;
// We save the raw data, to avoid damaging the file by many load/save cycles (especially for JPEG)
Q_ULONG size=io->writeBlock(m_rawData); // WARNING: writeBlock returns Q_LONG but size() Q_ULONG!
return (size==m_rawData.size());
}
QSize KoPictureImage::getOriginalSize(void) const
{
return m_originalImage.size();
}
QPixmap KoPictureImage::generatePixmap(const QSize& size, bool smoothScale)
{
scaleAndCreatePixmap(size,!smoothScale);
return m_cachedPixmap;
}
QString KoPictureImage::getMimeType(const QString& extension) const
{
QString fileName("/tmp/temp.");
fileName+=extension;
// Find the mimetype only by the extension, not by file content (as the file is empty!)
const QString mimetype( KMimeType::findByPath( fileName, 0 ,true )->name() );
// ### TODO: use KMimeType::findByContent (but then the mimetype probably need to be cached)
kdDebug(30003) << "Image is mime type: " << mimetype << endl;
return mimetype;
}
QDragObject* KoPictureImage::dragObject( QWidget *dragSource, const char *name )
{
return new QImageDrag( m_originalImage, dragSource, name );
}
QImage KoPictureImage::generateImage(const QSize& size)
{
// We do not cache the image, as we will seldom need it again.
return m_originalImage.smoothScale( size );
}
void KoPictureImage::clearCache(void)
{
m_cachedPixmap.resize(0, 0);
m_cacheIsInFastMode=true;
m_cachedSize=QSize();
}
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