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/* This file is part of the KDE project
Copyright (c) 2001 Simon Hausmann <hausmann@kde.org>
Copyright (C) 2002, 2003, 2004 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.
*/
#ifndef __koPictureEps_h__
#define __koPictureEps_h__
#include <qstring.h>
class QPainter;
class QSize;
class KoPictureEpsPrivate;
// TODO: fix documentation
/**
* @internal
* KoPictureEps is a container class for a EPS picture
*/
class KoPictureEps : public KoPictureBase
{
public:
/**
* Default constructor.
*/
KoPictureEps();
/**
* Destructor.
*/
virtual ~KoPictureEps();
KoPictureType::Type getType(void) const;
KoPictureBase* newCopy(void) const;
/**
* Returns true if the picture is null.
*/
virtual bool isNull(void) const;
/**
* @brief Draw the image in a painter.
*
* No, this isn't as simple as painter.drawPixmap().
* This method ensures that the best quality is used when printing, scaling the painter.
*
* The parameter @p fastMode allows the picture to be re-sized and drawn quicker if possible
*
* The parameters @p width, @p height define the desired size for the image
* Note that the image is being scaled to that size using scale() - except when printing.
* This avoids scaling the image at each paint event.
*
* The other parameters are very similar to QPainter::drawPixmap :
* (@p x, @p y) define the position in the painter,
* (@p sx, @p sy) specify the top-left point in pixmap that is to be drawn. The default is (0, 0).
* (@p sw, @p sh) specify the size of the pixmap that is to be drawn. The default, (-1, -1), means all the way to the bottom
* right of the pixmap.
*/
virtual void draw(QPainter& painter, int x, int y, int width, int height, int sx = 0, int sy = 0, int sw = -1, int sh = -1, bool fastMode = false);
virtual bool loadData(const QByteArray& array, const QString& extension);
virtual bool save(QIODevice* io) const;
virtual QSize getOriginalSize(void) const;
virtual QPixmap generatePixmap(const QSize& size, bool smoothScale = false);
virtual QString getMimeType(const QString& extension) const;
/**
* Generate a QImage
* (always in slow mode)
*/
virtual QImage generateImage(const QSize& size);
virtual void clearCache(void);
protected:
QPixmap getPixmap(QImage& image);
void scaleAndCreatePixmap(const QSize& size, bool fastMode, const int resolutionx, const int resolutiony );
QImage scaleWithGhostScript( const QSize& size, const int resolutionx, const int resolutiony );
bool extractPostScriptStream( void );
private:
int tryScaleWithGhostScript(QImage &image, const QSize& size, const int resolutionx, const int resolutiony, const char* device );
/**
* @brief Read a line from a PostScript stream in a QByteArray
*
* The PostScript stream is somewhere in the QByteArray and therefore has to be
* determined by the start and length of this stream and the current position
*
* @param array the array which is read
* @param start start position of the PostScript stream
* @param lenght lenght of the PostScript stream
* @param pos current position (which is also returned)
* @param lastCharWasCr defines if the previous line ended with a Carriage Return,
* to skip an eventual Line Feed at the start of this line
* @return the read line
*/
QString readLine( const QByteArray& array, const uint start, const uint length, uint& pos, bool& lastCharWasCr );
private:
/**
* Copy of the loaded EPS file
*/
QByteArray m_rawData;
QPixmap m_cachedPixmap; ///< Cached pixmap
QSize m_originalSize; ///< Original size of the EPS picture
QSize m_cachedSize; ///< size of the currently cached pixmap @see m_cachedPixmap
QRect m_boundingBox; ///< Bounding box, as read from the EPS file
uint m_psStreamStart; ///< Start position of the PostScript stream (like if it was a MS-DOS EPS file)
uint m_psStreamLength; ///< Lenght of the PostScript stream (like if it was a MS-DOS EPS file)
/**
* true, if the last cached image was done using fast mode.
* false, if the last cached image was done using slow mode.
*/
bool m_cacheIsInFastMode;
};
#endif /* __koPictureEps_h__ */
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