qpdf_p.h

qt-x11-opensource-src-4.1.4.tar.gz源码

/****************************************************************************
**
** Copyright (C) 1992-2006 Trolltech ASA. All rights reserved.
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** This file may be used under the terms of the GNU General Public
** License version 2.0 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 GNU
** General Public Licensing requirements will be met:
** http://www.trolltech.com/products/qt/opensource.html
**
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://www.trolltech.com/products/qt/licensing.html or contact the
** sales department at [e-mail].
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/

#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_p.h"
#include "qprintengine.h"

#ifndef QT_NO_PRINTER

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:
        ByteStream(QByteArray *b) :ba(b) {}
        ByteStream &operator <<(char chr) { *ba += chr; return *this; }
        ByteStream &operator <<(const char *str) { *ba += str; return *this; }
        ByteStream &operator <<(const QByteArray &str) { *ba += str; return *this; }
        ByteStream &operator <<(qreal val) { char buf[256]; *ba += qt_real_to_string(val, buf); return *this; }
        ByteStream &operator <<(int val) { char buf[256]; *ba += qt_int_to_string(val, buf); return *this; }
        ByteStream &operator <<(const QPointF &p) { char buf[256]; *ba += qt_real_to_string(p.x(), buf);
            *ba += qt_real_to_string(p.y(), buf); return *this; }
    private:
        QByteArray *ba;
    };

    enum PathFlags {
        ClipPath,
        FillPath,
        StrokePath,
        FillAndStrokePath
    };
    QByteArray generatePath(const QPainterPath &path, const QMatrix &matrix, PathFlags flags);
    QByteArray generateMatrix(const QMatrix &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;
        QMatrix matrix;
        bool zeroWidth;
    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;
    };
    PaperSize paperSize(QPrinter::PageSize pageSize);
    const char *paperSizeToString(QPrinter::PageSize pageSize);
};


class QPdfPage : public QPdf::ByteStream
{
public:
    QPdfPage();
    QByteArray content() { return data; }

    QVector<uint> images;
    QVector<uint> graphicStates;
    QVector<uint> patterns;
    QVector<uint> fonts;

    void streamImage(int w, int h, int object);
private:
    QByteArray data;
};


class QPdfBaseEnginePrivate;

class QPdfBaseEngine : public QPaintEngine, public QPrintEngine
{
    Q_DECLARE_PRIVATE(QPdfBaseEngine)
public:
    QPdfBaseEngine(QPdfBaseEnginePrivate &d, PaintEngineFeatures f);
    ~QPdfBaseEngine() {}

    // reimplementations QPaintEngine
    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);
    // end reimplementations QPaintEngine

    void setPen();
    virtual void setBrush() = 0;

private:
    void updateClipPath(const QPainterPath & path, Qt::ClipOperation op);
};

class QPdfBaseEnginePrivate : public QPaintEnginePrivate
{
    Q_DECLARE_PUBLIC(QPdfBaseEngine)
public:
    QPdfBaseEnginePrivate();
    ~QPdfBaseEnginePrivate();
    
    void drawTextItem(const QPointF &p, const QTextItemInt &ti);
    inline uint requestObject() { return currentObject++; }

    bool postscript;
    int currentObject;

    QPdfPage* currentPage;
    QPdf::Stroker stroker;

    Qt::BGMode backgroundMode;
    QBrush backgroundBrush;
    QPointF brushOrigin;
    QBrush brush;
    QPen pen;
    QList<QPainterPath> clips;
    bool clipEnabled;
    bool allClipped;
    bool hasPen;
    bool hasBrush;

    QHash<QFontEngine::FaceId, QFontSubset *> fonts;
};

#endif
#endif