Long live Qt!

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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#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/qmatrix.h"
+#include "QtCore/qstring.h"
+#include "QtCore/qvector.h"
+#include "private/qstroker_p.h"
+#include "private/qfontengine_p.h"
+#include "QtGui/qprinter.h"
+#include "private/qfontsubset_p.h"
+#include "private/qpaintengine_alpha_p.h"
+#include "qprintengine.h"
+#include "qbuffer.h"
+
+#ifndef QT_NO_PRINTER
+
+QT_BEGIN_NAMESPACE
+
+#define PPK_CupsOptions QPrintEngine::PrintEnginePropertyKey(0xfe00)
+#define PPK_CupsPageRect QPrintEngine::PrintEnginePropertyKey(0xfe01)
+#define PPK_CupsPaperRect QPrintEngine::PrintEnginePropertyKey(0xfe02)
+#define PPK_CupsStringPageSize QPrintEngine::PrintEnginePropertyKey(0xfe03)
+
+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);
+#ifdef USE_NATIVE_GRADIENTS
+    QByteArray generateLinearGradientShader(const QLinearGradient *lg, const QPointF *page_rect, bool alpha = false);
+#endif
+
+    struct Stroker {
+        Stroker();
+        void setPen(const QPen &pen);
+        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);
+
+
+    struct PaperSize {
+        int width, height; // in postscript points
+    };
+    PaperSize paperSize(QPrinter::PaperSize paperSize);
+    const char *paperSizeToString(QPrinter::PaperSize paperSize);
+
+
+    QByteArray stripSpecialCharacters(const QByteArray &string);
+};
+
+
+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 QPdfBaseEnginePrivate;
+
+class QPdfBaseEngine : public QAlphaPaintEngine, public QPrintEngine
+{
+    Q_DECLARE_PRIVATE(QPdfBaseEngine)
+public:
+    QPdfBaseEngine(QPdfBaseEnginePrivate &d, PaintEngineFeatures f);
+    ~QPdfBaseEngine() {}
+
+    // reimplementations QPaintEngine
+    bool begin(QPaintDevice *pdev);
+    bool end();
+
+    void drawPoints(const QPointF *points, int pointCount);
+    void drawLines(const QLineF *lines, int lineCount);
+    void drawRects(const QRectF *rects, int rectCount);
+    void drawPolygon(const QPointF *points, int pointCount, PolygonDrawMode mode);
+    void drawPath (const QPainterPath & path);
+
+    void drawTextItem(const QPointF &p, const QTextItem &textItem);
+
+    void updateState(const QPaintEngineState &state);
+
+    int metric(QPaintDevice::PaintDeviceMetric metricType) const;
+    // end reimplementations QPaintEngine
+
+    // Printer stuff...
+    bool newPage();
+    void setProperty(PrintEnginePropertyKey key, const QVariant &value);
+    QVariant property(PrintEnginePropertyKey key) const;
+
+    void setPen();
+    virtual void setBrush() = 0;
+    void setupGraphicsState(QPaintEngine::DirtyFlags flags);
+
+private:
+    void updateClipPath(const QPainterPath & path, Qt::ClipOperation op);
+
+    friend int qt_printerRealNumCopies(QPaintEngine *);
+};
+
+class QPdfBaseEnginePrivate : public QAlphaPaintEnginePrivate
+{
+    Q_DECLARE_PUBLIC(QPdfBaseEngine)
+public:
+    QPdfBaseEnginePrivate(QPrinter::PrinterMode m);
+    ~QPdfBaseEnginePrivate();
+
+    bool openPrintDevice();
+    void closePrintDevice();
+
+
+    virtual void drawTextItem(const QPointF &p, const QTextItemInt &ti);
+    inline uint requestObject() { return currentObject++; }
+
+    QRect paperRect() const;
+    QRect pageRect() const;
+
+    bool postscript;
+    int currentObject;
+
+    QPdfPage* currentPage;
+    QPdf::Stroker stroker;
+
+    QPointF brushOrigin;
+    QBrush brush;
+    QPen pen;
+    QList<QPainterPath> clips;
+    bool clipEnabled;
+    bool allClipped;
+    bool hasPen;
+    bool hasBrush;
+    bool simplePen;
+    qreal opacity;
+    bool useAlphaEngine;
+
+    QHash<QFontEngine::FaceId, QFontSubset *> fonts;
+
+    QPaintDevice *pdev;
+
+    // the device the output is in the end streamed to.
+    QIODevice *outDevice;
+    int fd;
+
+    // printer options
+    QString outputFileName;
+    QString printerName;
+    QString printProgram;
+    QString selectionOption;
+    QString title;
+    QString creator;
+    QPrinter::DuplexMode duplex;
+    bool collate;
+    bool fullPage;
+    bool embedFonts;
+    int copies;
+    int resolution;
+    QPrinter::PageOrder pageOrder;
+    QPrinter::Orientation orientation;
+    QPrinter::PaperSize paperSize;
+    QPrinter::ColorMode colorMode;
+    QPrinter::PaperSource paperSource;
+
+    QStringList cupsOptions;
+    QRect cupsPaperRect;
+    QRect cupsPageRect;
+    QString cupsStringPageSize;
+    QSizeF customPaperSize; // in postscript points
+    bool hasCustomPageMargins;
+    qreal leftMargin, topMargin, rightMargin, bottomMargin;
+
+#if !defined(QT_NO_CUPS) && !defined(QT_NO_LIBRARY)
+    QString cupsTempFile;
+#endif
+};
+
+QT_END_NAMESPACE
+
+#endif // QT_NO_PRINTER
+
+#endif // QPDF_P_H
+