/****************************************************************************

**

** All rights reserved.

** Contact: Nokia Corporation (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 Technology Preview License Agreement accompanying

** this package.

**

** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.

**

** If you have questions regarding the use of this file, please contact

** Nokia at qt-info@nokia.com.

**

**

**

**

**

**

**

**

** $QT_END_LICENSE$

**

****************************************************************************/

#ifndef QPAINTBUFFER_P_H

#define QPAINTBUFFER_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 <qpaintdevice.h>

#include <private/qpaintengineex_p.h>

#include <private/qtextengine_p.h>

#include <QDebug>

QT_BEGIN_NAMESPACE

class QPaintBufferPrivate;

class QPaintBufferPlayback;

class Q_GUI_EXPORT QPaintBuffer : public QPaintDevice

{

    Q_DECLARE_PRIVATE(QPaintBuffer)

public:

    QPaintBuffer();

    QPaintBuffer(const QPaintBuffer &other);

    ~QPaintBuffer();

    bool isEmpty() const;

    void beginNewFrame();

    int numFrames() const;

    void draw(QPainter *painter, int frame = 0) const;

    void setBoundingRect(const QRectF &rect);

    QRectF boundingRect() const;

    virtual QPaintEngine *paintEngine() const;

    virtual int metric(PaintDeviceMetric m) const;

    virtual int devType() const;

    QPaintBuffer &operator=(const QPaintBuffer &other);

private:

    friend class QPainterReplayer;

    friend class QOpenGLReplayer;

    friend Q_GUI_EXPORT QDataStream &operator<<(QDataStream &stream, const QPaintBuffer &buffer);

    friend Q_GUI_EXPORT QDataStream &operator>>(QDataStream &stream, QPaintBuffer &buffer);

    QPaintBufferPrivate *d_ptr;

};

Q_GUI_EXPORT QDataStream &operator<<(QDataStream &stream, const QPaintBuffer &buffer);

Q_GUI_EXPORT QDataStream &operator>>(QDataStream &stream, QPaintBuffer &buffer);

class QPaintBufferEngine;

class QTextItemIntCopy

{

public:

    QTextItemIntCopy(const QTextItem &item);

    ~QTextItemIntCopy();

    QTextItemInt &operator () () {return m_item;}

private:

    QTextItemInt m_item;

    QFont m_font;

};

struct QPaintBufferCommand

{

    uint id : 8;

    uint size : 24;

    int offset;

    int offset2;

    int extra;

};

QDataStream &operator<<(QDataStream &stream, const QPaintBufferCommand &command);

QDataStream &operator>>(QDataStream &stream, QPaintBufferCommand &command);

Q_DECLARE_TYPEINFO(QPaintBufferCommand, Q_MOVABLE_TYPE);

class QPaintBufferPrivate

{

public:

    enum Command {

        Cmd_Save,

        Cmd_Restore,

        Cmd_SetBrush,

        Cmd_SetBrushOrigin,

        Cmd_SetClipEnabled,

        Cmd_SetCompositionMode,

        Cmd_SetOpacity,

        Cmd_SetPen,

        Cmd_SetRenderHints,

        Cmd_SetTransform,

        Cmd_SetBackgroundMode,

        Cmd_ClipPath,

        Cmd_ClipRect,

        Cmd_ClipRegion,

        Cmd_ClipVectorPath,

        Cmd_DrawVectorPath,

        Cmd_FillVectorPath,

        Cmd_StrokeVectorPath,

        Cmd_DrawConvexPolygonF,

        Cmd_DrawConvexPolygonI,

        Cmd_DrawEllipseF,

        Cmd_DrawEllipseI,

        Cmd_DrawLineF,

        Cmd_DrawLineI,

        Cmd_DrawPath,

        Cmd_DrawPointsF,

        Cmd_DrawPointsI,

        Cmd_DrawPolygonF,

        Cmd_DrawPolygonI,

        Cmd_DrawPolylineF,

        Cmd_DrawPolylineI,

        Cmd_DrawRectF,

        Cmd_DrawRectI,

        Cmd_FillRectBrush,

        Cmd_FillRectColor,

        Cmd_DrawText,

        Cmd_DrawTextItem,

        Cmd_DrawImagePos,

        Cmd_DrawImageRect,

        Cmd_DrawPixmapPos,

        Cmd_DrawPixmapRect,

        Cmd_DrawTiledPixmap,

        Cmd_SystemStateChanged,

        Cmd_LastCommand

    };

    QPaintBufferPrivate();

    ~QPaintBufferPrivate();

    int addData(const int *data, int count) {

        if (count <= 0)

            return 0;

        int pos = ints.size();

        ints.resize(pos + count);

        memcpy(ints.data() + pos, data, count * sizeof(int));

        return pos;

    }

    int addData(const qreal *data, int count) {

        if (count <= 0)

            return 0;

        int pos = floats.size();

        floats.resize(pos + count);

        memcpy(floats.data() + pos, data, count * sizeof(qreal));

        return pos;

    }

    int addData(const QVariant &var) {

        variants << var;

        return variants.size() - 1;

    }

    QPaintBufferCommand *addCommand(Command command) {

        QPaintBufferCommand cmd;

        cmd.id = command;

        cmd.size = cmd.offset = cmd.offset2 = cmd.extra = 0;

        commands << cmd;

        return &commands.last();

    }

    QPaintBufferCommand *addCommand(Command command, const QVariant &var) {

        QPaintBufferCommand cmd;

        cmd.id = command;

        cmd.offset = addData(var);

        cmd.size = cmd.offset2 = cmd.extra = 0;

        commands << cmd;

        return &commands.last();

    }

    QPaintBufferCommand *addCommand(Command command, const QVectorPath &path) {

        QPaintBufferCommand cmd;

        cmd.id = command;

        cmd.offset = addData(path.points(), path.elementCount() * 2);

        cmd.offset2 = ints.size();

        ints << path.hints();

        // The absence of path elements is indicated by setting the highest bit in 'cmd.offset2'.

        if (path.elements())

            addData((const int *) path.elements(), path.elementCount());

        else

            cmd.offset2 |= 0x80000000;

        cmd.size = path.elementCount();

        cmd.extra = 0;

        commands << cmd;

        return &commands.last();

    }

    QPaintBufferCommand *addCommand(Command command , const qreal *pts, int arrayLength, int elementCount) {

        QPaintBufferCommand cmd;

        cmd.id = command;

        cmd.offset = addData(pts, arrayLength);

        cmd.size = elementCount;

        cmd.offset2 = cmd.extra = 0;

        commands << cmd;

        return &commands.last();

    }

    QPaintBufferCommand *addCommand(Command command , const int *pts, int arrayLength, int elementCount) {

        QPaintBufferCommand cmd;

        cmd.id = command;

        cmd.offset = addData(pts, arrayLength);

        cmd.size = elementCount;

        cmd.offset2 = cmd.extra = 0;

        commands << cmd;

        return &commands.last();

    }

    inline void updateBoundingRect(const QRectF &rect);

    QAtomicInt ref;

    QVector<int> ints;

    QVector<qreal> floats;

    QVector<QVariant> variants;

    QVector<QPaintBufferCommand> commands;

    QList<int> frames;

    QPaintBufferEngine *engine;

    QRectF boundingRect;

    qreal penWidthAdjustment;

    uint calculateBoundingRect : 1;

    void *cache;

};

struct QVectorPathCmd

{

    // The absence of path elements is indicated by setting the highest bit in 'cmd.offset2'.

    QVectorPathCmd(QPaintBufferPrivate *d, const QPaintBufferCommand &cmd)

        : vectorPath(d->floats.constData() + cmd.offset,

                     cmd.size,

                     cmd.offset2 & 0x80000000

                     ? 0

                     : (const QPainterPath::ElementType *) (d->ints.constData() + cmd.offset2 + 1),

                     *(d->ints.constData() + (cmd.offset2 & 0x7fffffff))) {}

    inline const QVectorPath &operator()() const { return vectorPath; }

    QVectorPath vectorPath;

};

class Q_GUI_EXPORT QPainterReplayer

{

public:

    QPainterReplayer() { }

    virtual ~QPainterReplayer() { }

    void setupTransform(QPainter *painter);

    virtual void process(const QPaintBufferCommand &cmd);

    void draw(const QPaintBuffer &buffer, QPainter *painter, int frame);

protected:

    QPaintBufferPrivate *d;

    QTransform m_world_matrix;

    QPainter *painter;

};

class Q_GUI_EXPORT QPaintEngineExReplayer : public QPainterReplayer

{

public:

    QPaintEngineExReplayer() { }

    virtual void process(const QPaintBufferCommand &cmd);

};

class QPaintBufferEnginePrivate;

class QPaintBufferEngine : public QPaintEngineEx

{

    Q_DECLARE_PRIVATE(QPaintBufferEngine)

public:

    QPaintBufferEngine(QPaintBufferPrivate *buffer);

    virtual bool begin(QPaintDevice *device);

    virtual bool end();

    virtual Type type() const { return QPaintEngine::PaintBuffer; }

    virtual QPainterState *createState(QPainterState *orig) const;

    virtual void draw(const QVectorPath &path);

    virtual void fill(const QVectorPath &path, const QBrush &brush);

    virtual void stroke(const QVectorPath &path, const QPen &pen);

    virtual void clip(const QVectorPath &path, Qt::ClipOperation op);

    virtual void clip(const QRect &rect, Qt::ClipOperation op);

    virtual void clip(const QRegion &region, Qt::ClipOperation op);

    virtual void clip(const QPainterPath &path, Qt::ClipOperation op);

    virtual void clipEnabledChanged();

    virtual void penChanged();

    virtual void brushChanged();

    virtual void brushOriginChanged();

    virtual void opacityChanged();

    virtual void compositionModeChanged();

    virtual void renderHintsChanged();

    virtual void transformChanged();

    virtual void backgroundModeChanged();

    virtual void fillRect(const QRectF &rect, const QBrush &brush);

    virtual void fillRect(const QRectF &rect, const QColor &color);

    virtual void drawRects(const QRect *rects, int rectCount);

    virtual void drawRects(const QRectF *rects, int rectCount);

    virtual void drawLines(const QLine *lines, int lineCount);

    virtual void drawLines(const QLineF *lines, int lineCount);

    virtual void drawEllipse(const QRectF &r);

    virtual void drawEllipse(const QRect &r);

    virtual void drawPath(const QPainterPath &path);

    virtual void drawPoints(const QPointF *points, int pointCount);

    virtual void drawPoints(const QPoint *points, int pointCount);

    virtual void drawPolygon(const QPointF *points, int pointCount, PolygonDrawMode mode);

    virtual void drawPolygon(const QPoint *points, int pointCount, PolygonDrawMode mode);

    virtual void drawPixmap(const QRectF &r, const QPixmap &pm, const QRectF &sr);

    virtual void drawPixmap(const QPointF &pos, const QPixmap &pm);

    virtual void drawImage(const QRectF &r, const QImage &pm, const QRectF &sr,

                           Qt::ImageConversionFlags flags = Qt::AutoColor);

    virtual void drawImage(const QPointF &pos, const QImage &image);

    virtual void drawTiledPixmap(const QRectF &r, const QPixmap &pixmap, const QPointF &s);

    virtual void drawTextItem(const QPointF &pos, const QTextItem &ti);

    virtual void setState(QPainterState *s);

    virtual uint flags() const {return QPaintEngineEx::DoNotEmulate;}

    QPaintBufferPrivate *buffer;

    mutable int m_begin_detected : 1;

    mutable int m_save_detected : 1;

    mutable int m_stream_raw_text_items : 1;

    mutable int m_unused : 29;

    mutable QPainterState *m_created_state;

};

class Q_GUI_EXPORT QPaintBufferSignalProxy : public QObject

{

    Q_OBJECT

public:

    QPaintBufferSignalProxy() : QObject() {}

    void emitAboutToDestroy(const QPaintBufferPrivate *buffer) {

        emit aboutToDestroy(buffer);

    }

    static QPaintBufferSignalProxy *instance();

Q_SIGNALS:

    void aboutToDestroy(const QPaintBufferPrivate *buffer);

};

// One resource per paint buffer and vice versa.

class Q_GUI_EXPORT QPaintBufferResource : public QObject

{

    Q_OBJECT

public:

    typedef void (*FreeFunc)(void *);

    QPaintBufferResource(FreeFunc f, QObject *parent = 0);

    ~QPaintBufferResource();

    // Set resource 'value' for 'key'.

    void insert(const QPaintBufferPrivate *key, void *value);

    // Return resource for 'key'.

    void *value(const QPaintBufferPrivate *key);

public slots:

    // Remove entry 'key' from cache and delete resource.

    void remove(const QPaintBufferPrivate *key);

private:

    typedef QHash<const QPaintBufferPrivate *, void *> Cache;

    Cache m_cache;

    FreeFunc free;

};

QT_END_NAMESPACE

#endif // QPAINTBUFFER_P_H