| Current File : //usr/include/qt5/QtGui/5.9.7/QtGui/private/qpdf_p.h |
/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QPDF_P_H
#define QPDF_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include <QtGui/private/qtguiglobal_p.h>
#ifndef QT_NO_PDF
#include "QtGui/qmatrix.h"
#include "QtCore/qstring.h"
#include "QtCore/qvector.h"
#include "private/qstroker_p.h"
#include "private/qpaintengine_p.h"
#include "private/qfontengine_p.h"
#include "private/qfontsubset_p.h"
#include "qpagelayout.h"
QT_BEGIN_NAMESPACE
const char *qt_real_to_string(qreal val, char *buf);
const char *qt_int_to_string(int val, char *buf);
namespace QPdf {
class ByteStream
{
public:
// fileBacking means that ByteStream will buffer the contents on disk
// if the size exceeds a certain threshold. In this case, if a byte
// array was passed in, its contents may no longer correspond to the
// ByteStream contents.
explicit ByteStream(bool fileBacking = false);
explicit ByteStream(QByteArray *ba, bool fileBacking = false);
~ByteStream();
ByteStream &operator <<(char chr);
ByteStream &operator <<(const char *str);
ByteStream &operator <<(const QByteArray &str);
ByteStream &operator <<(const ByteStream &src);
ByteStream &operator <<(qreal val);
ByteStream &operator <<(int val);
ByteStream &operator <<(const QPointF &p);
// Note that the stream may be invalidated by calls that insert data.
QIODevice *stream();
void clear();
static inline int maxMemorySize() { return 100000000; }
static inline int chunkSize() { return 10000000; }
protected:
void constructor_helper(QIODevice *dev);
void constructor_helper(QByteArray *ba);
private:
void prepareBuffer();
private:
QIODevice *dev;
QByteArray ba;
bool fileBackingEnabled;
bool fileBackingActive;
bool handleDirty;
};
enum PathFlags {
ClipPath,
FillPath,
StrokePath,
FillAndStrokePath
};
QByteArray generatePath(const QPainterPath &path, const QTransform &matrix, PathFlags flags);
QByteArray generateMatrix(const QTransform &matrix);
QByteArray generateDashes(const QPen &pen);
QByteArray patternForBrush(const QBrush &b);
struct Stroker {
Stroker();
void setPen(const QPen &pen, QPainter::RenderHints hints);
void strokePath(const QPainterPath &path);
ByteStream *stream;
bool first;
QTransform matrix;
bool cosmeticPen;
private:
QStroker basicStroker;
QDashStroker dashStroker;
QStrokerOps *stroker;
};
QByteArray ascii85Encode(const QByteArray &input);
const char *toHex(ushort u, char *buffer);
const char *toHex(uchar u, char *buffer);
}
class QPdfPage : public QPdf::ByteStream
{
public:
QPdfPage();
QVector<uint> images;
QVector<uint> graphicStates;
QVector<uint> patterns;
QVector<uint> fonts;
QVector<uint> annotations;
void streamImage(int w, int h, int object);
QSize pageSize;
private:
};
class QPdfWriter;
class QPdfEnginePrivate;
class Q_GUI_EXPORT QPdfEngine : public QPaintEngine
{
Q_DECLARE_PRIVATE(QPdfEngine)
friend class QPdfWriter;
public:
QPdfEngine();
QPdfEngine(QPdfEnginePrivate &d);
~QPdfEngine() {}
void setOutputFilename(const QString &filename);
void setResolution(int resolution);
int resolution() const;
// reimplementations QPaintEngine
bool begin(QPaintDevice *pdev) Q_DECL_OVERRIDE;
bool end() Q_DECL_OVERRIDE;
void drawPoints(const QPointF *points, int pointCount) Q_DECL_OVERRIDE;
void drawLines(const QLineF *lines, int lineCount) Q_DECL_OVERRIDE;
void drawRects(const QRectF *rects, int rectCount) Q_DECL_OVERRIDE;
void drawPolygon(const QPointF *points, int pointCount, PolygonDrawMode mode) Q_DECL_OVERRIDE;
void drawPath (const QPainterPath & path) Q_DECL_OVERRIDE;
void drawTextItem(const QPointF &p, const QTextItem &textItem) Q_DECL_OVERRIDE;
void drawPixmap (const QRectF & rectangle, const QPixmap & pixmap, const QRectF & sr) Q_DECL_OVERRIDE;
void drawImage(const QRectF &r, const QImage &pm, const QRectF &sr,
Qt::ImageConversionFlags flags = Qt::AutoColor) Q_DECL_OVERRIDE;
void drawTiledPixmap (const QRectF & rectangle, const QPixmap & pixmap, const QPointF & point) Q_DECL_OVERRIDE;
void drawHyperlink(const QRectF &r, const QUrl &url);
void updateState(const QPaintEngineState &state) Q_DECL_OVERRIDE;
int metric(QPaintDevice::PaintDeviceMetric metricType) const;
Type type() const Q_DECL_OVERRIDE;
// end reimplementations QPaintEngine
// Printer stuff...
bool newPage();
// Page layout stuff
void setPageLayout(const QPageLayout &pageLayout);
void setPageSize(const QPageSize &pageSize);
void setPageOrientation(QPageLayout::Orientation orientation);
void setPageMargins(const QMarginsF &margins, QPageLayout::Unit units = QPageLayout::Point);
QPageLayout pageLayout() const;
void setPen();
void setBrush();
void setupGraphicsState(QPaintEngine::DirtyFlags flags);
private:
void updateClipPath(const QPainterPath & path, Qt::ClipOperation op);
};
class Q_GUI_EXPORT QPdfEnginePrivate : public QPaintEnginePrivate
{
Q_DECLARE_PUBLIC(QPdfEngine)
public:
QPdfEnginePrivate();
~QPdfEnginePrivate();
inline uint requestObject() { return currentObject++; }
void writeHeader();
void writeTail();
int addImage(const QImage &image, bool *bitmap, qint64 serial_no);
int addConstantAlphaObject(int brushAlpha, int penAlpha = 255);
int addBrushPattern(const QTransform &matrix, bool *specifyColor, int *gStateObject);
void drawTextItem(const QPointF &p, const QTextItemInt &ti);
QTransform pageMatrix() const;
void newPage();
int currentObject;
QPdfPage* currentPage;
QPdf::Stroker stroker;
QPointF brushOrigin;
QBrush brush;
QPen pen;
QVector<QPainterPath> clips;
bool clipEnabled;
bool allClipped;
bool hasPen;
bool hasBrush;
bool simplePen;
qreal opacity;
QHash<QFontEngine::FaceId, QFontSubset *> fonts;
QPaintDevice *pdev;
// the device the output is in the end streamed to.
QIODevice *outDevice;
bool ownsDevice;
// printer options
QString outputFileName;
QString title;
QString creator;
bool embedFonts;
int resolution;
bool grayscale;
// Page layout: size, orientation and margins
QPageLayout m_pageLayout;
private:
int gradientBrush(const QBrush &b, const QTransform &matrix, int *gStateObject);
int generateGradientShader(const QGradient *gradient, const QTransform &matrix, bool alpha = false);
int generateLinearGradientShader(const QLinearGradient *lg, const QTransform &matrix, bool alpha);
int generateRadialGradientShader(const QRadialGradient *gradient, const QTransform &matrix, bool alpha);
int createShadingFunction(const QGradient *gradient, int from, int to, bool reflect, bool alpha);
void writeInfo();
void writePageRoot();
void writeFonts();
void embedFont(QFontSubset *font);
QVector<int> xrefPositions;
QDataStream* stream;
int streampos;
int writeImage(const QByteArray &data, int width, int height, int depth,
int maskObject, int softMaskObject, bool dct = false, bool isMono = false);
void writePage();
int addXrefEntry(int object, bool printostr = true);
void printString(const QString &string);
void xprintf(const char* fmt, ...);
inline void write(const QByteArray &data) {
stream->writeRawData(data.constData(), data.size());
streampos += data.size();
}
int writeCompressed(const char *src, int len);
inline int writeCompressed(const QByteArray &data) { return writeCompressed(data.constData(), data.length()); }
int writeCompressed(QIODevice *dev);
// various PDF objects
int pageRoot, catalog, info, graphicsState, patternColorSpace;
QVector<uint> pages;
QHash<qint64, uint> imageCache;
QHash<QPair<uint, uint>, uint > alphaCache;
};
QT_END_NAMESPACE
#endif // QT_NO_PDF
#endif // QPDF_P_H