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

**

** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).

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** Contact: Nokia Corporation (qt-info@nokia.com)

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** This file is part of the QtGui module of the Qt Toolkit.

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** 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.

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** GNU Lesser General Public License Usage

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** 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

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** In addition, as a special exception, Nokia gives you certain additional

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** $QT_END_LICENSE$

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

#ifndef QIMAGE_H

#define QIMAGE_H

#include <QtGui/qtransform.h>

#include <QtGui/qpaintdevice.h>

#include <QtGui/qrgb.h>

#include <QtCore/qbytearray.h>

#include <QtCore/qrect.h>

#include <QtCore/qstring.h>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Gui)

class QIODevice;

class QStringList;

class QMatrix;

class QTransform;

class QVariant;

template <class T> class QList;

template <class T> class QVector;

struct QImageData;

class QImageDataMisc; // internal

#ifndef QT_NO_IMAGE_TEXT

class Q_GUI_EXPORT QImageTextKeyLang {

public:

    QImageTextKeyLang(const char* k, const char* l) : key(k), lang(l) { }

    QImageTextKeyLang() { }

    QByteArray key;

    QByteArray lang;

    bool operator< (const QImageTextKeyLang& other) const

        { return key < other.key || (key==other.key && lang < other.lang); }

    bool operator== (const QImageTextKeyLang& other) const

        { return key==other.key && lang==other.lang; }

    inline bool operator!= (const QImageTextKeyLang &other) const

        { return !operator==(other); }

};

#endif //QT_NO_IMAGE_TEXT

class Q_GUI_EXPORT QImage : public QPaintDevice

{

public:

    enum InvertMode { InvertRgb, InvertRgba };

    enum Format {

        Format_Invalid,

        Format_Mono,

        Format_MonoLSB,

        Format_Indexed8,

        Format_RGB32,

        Format_ARGB32,

        Format_ARGB32_Premultiplied,

        Format_RGB16,

        Format_ARGB8565_Premultiplied,

        Format_RGB666,

        Format_ARGB6666_Premultiplied,

        Format_RGB555,

        Format_ARGB8555_Premultiplied,

        Format_RGB888,

        Format_RGB444,

        Format_ARGB4444_Premultiplied,

#if 0

        // reserved for future use

        Format_RGB15,

        Format_Grayscale16,

        Format_Grayscale8,

        Format_Grayscale4,

        Format_Grayscale4LSB,

        Format_Grayscale2,

        Format_Grayscale2LSB

#endif

#ifndef qdoc

        NImageFormats

#endif

    };

    QImage();

    QImage(const QSize &size, Format format);

    QImage(int width, int height, Format format);

    QImage(uchar *data, int width, int height, Format format);

    QImage(const uchar *data, int width, int height, Format format);

    QImage(uchar *data, int width, int height, int bytesPerLine, Format format);

    QImage(const uchar *data, int width, int height, int bytesPerLine, Format format);

#ifndef QT_NO_IMAGEFORMAT_XPM

    explicit QImage(const char * const xpm[]);

#endif

    explicit QImage(const QString &fileName, const char *format = 0);

#ifndef QT_NO_CAST_FROM_ASCII

    explicit QImage(const char *fileName, const char *format = 0);

#endif

    QImage(const QImage &);

    ~QImage();

    QImage &operator=(const QImage &);

    bool isNull() const;

    int devType() const;

    bool operator==(const QImage &) const;

    bool operator!=(const QImage &) const;

    operator QVariant() const;

    void detach();

    bool isDetached() const;

    QImage copy(const QRect &rect = QRect()) const;

    inline QImage copy(int x, int y, int w, int h) const

        { return copy(QRect(x, y, w, h)); }

    Format format() const;

    QImage convertToFormat(Format f, Qt::ImageConversionFlags flags = Qt::AutoColor) const Q_REQUIRED_RESULT;

    QImage convertToFormat(Format f, const QVector<QRgb> &colorTable, Qt::ImageConversionFlags flags = Qt::AutoColor) const Q_REQUIRED_RESULT;

    int width() const;

    int height() const;

    QSize size() const;

    QRect rect() const;

    int depth() const;

#ifdef QT_DEPRECATED

    QT_DEPRECATED int numColors() const;

#endif

    int colorCount() const;

    QRgb color(int i) const;

    void setColor(int i, QRgb c);

#ifdef QT_DEPRECATED

    QT_DEPRECATED void setNumColors(int);

#endif

    void setColorCount(int);

    bool allGray() const;

    bool isGrayscale() const;

    uchar *bits();

    const uchar *bits() const;

#ifdef QT_DEPRECATED

    QT_DEPRECATED int numBytes() const;

#endif

    int byteCount() const;

    uchar *scanLine(int);

    const uchar *scanLine(int) const;

    int bytesPerLine() const;

    bool valid(int x, int y) const;

    bool valid(const QPoint &pt) const;

    int pixelIndex(int x, int y) const;

    int pixelIndex(const QPoint &pt) const;

    QRgb pixel(int x, int y) const;

    QRgb pixel(const QPoint &pt) const;

    void setPixel(int x, int y, uint index_or_rgb);

    void setPixel(const QPoint &pt, uint index_or_rgb);

    QVector<QRgb> colorTable() const;

    void setColorTable(const QVector<QRgb> colors);

    void fill(uint pixel);

    bool hasAlphaChannel() const;

    void setAlphaChannel(const QImage &alphaChannel);

    QImage alphaChannel() const;

    QImage createAlphaMask(Qt::ImageConversionFlags flags = Qt::AutoColor) const;

#ifndef QT_NO_IMAGE_HEURISTIC_MASK

    QImage createHeuristicMask(bool clipTight = true) const;

#endif

    QImage createMaskFromColor(QRgb color, Qt::MaskMode mode = Qt::MaskInColor) const;

    inline QImage scaled(int w, int h, Qt::AspectRatioMode aspectMode = Qt::IgnoreAspectRatio,

                        Qt::TransformationMode mode = Qt::FastTransformation) const

        { return scaled(QSize(w, h), aspectMode, mode); }

    QImage scaled(const QSize &s, Qt::AspectRatioMode aspectMode = Qt::IgnoreAspectRatio,

                 Qt::TransformationMode mode = Qt::FastTransformation) const;

    QImage scaledToWidth(int w, Qt::TransformationMode mode = Qt::FastTransformation) const;

    QImage scaledToHeight(int h, Qt::TransformationMode mode = Qt::FastTransformation) const;

    QImage transformed(const QMatrix &matrix, Qt::TransformationMode mode = Qt::FastTransformation) const;

    static QMatrix trueMatrix(const QMatrix &, int w, int h);

    QImage transformed(const QTransform &matrix, Qt::TransformationMode mode = Qt::FastTransformation) const;

    static QTransform trueMatrix(const QTransform &, int w, int h);

    QImage mirrored(bool horizontally = false, bool vertically = true) const;

    QImage rgbSwapped() const;

    void invertPixels(InvertMode = InvertRgb);

    bool load(QIODevice *device, const char* format);

    bool load(const QString &fileName, const char* format=0);

    bool loadFromData(const uchar *buf, int len, const char *format = 0);

    inline bool loadFromData(const QByteArray &data, const char* aformat=0)

        { return loadFromData(reinterpret_cast<const uchar *>(data.constData()), data.size(), aformat); }

    bool save(const QString &fileName, const char* format=0, int quality=-1) const;

    bool save(QIODevice *device, const char* format=0, int quality=-1) const;

    static QImage fromData(const uchar *data, int size, const char *format = 0);

    inline static QImage fromData(const QByteArray &data, const char *format = 0)

        { return fromData(reinterpret_cast<const uchar *>(data.constData()), data.size(), format); }

    int serialNumber() const;

    qint64 cacheKey() const;

    QPaintEngine *paintEngine() const;

    // Auxiliary data

    int dotsPerMeterX() const;

    int dotsPerMeterY() const;

    void setDotsPerMeterX(int);

    void setDotsPerMeterY(int);

    QPoint offset() const;

    void setOffset(const QPoint&);

#ifndef QT_NO_IMAGE_TEXT

    QStringList textKeys() const;

    QString text(const QString &key = QString()) const;

    void setText(const QString &key, const QString &value);

    // The following functions are obsolete as of 4.1

    QString text(const char* key, const char* lang=0) const;

    QList<QImageTextKeyLang> textList() const;

    QStringList textLanguages() const;

    QString text(const QImageTextKeyLang&) const;

    void setText(const char* key, const char* lang, const QString&);

#endif

#ifdef QT3_SUPPORT

    enum Endian { BigEndian, LittleEndian, IgnoreEndian };

    QT3_SUPPORT_CONSTRUCTOR QImage(int width, int height, int depth, int numColors=0, Endian bitOrder=IgnoreEndian);

    QT3_SUPPORT_CONSTRUCTOR QImage(const QSize&, int depth, int numColors=0, Endian bitOrder=IgnoreEndian);

    QT3_SUPPORT_CONSTRUCTOR QImage(uchar *data, int w, int h, int depth, const QRgb *colortable, int numColors, Endian bitOrder);

#ifdef Q_WS_QWS

    QT3_SUPPORT_CONSTRUCTOR QImage(uchar *data, int w, int h, int depth, int pbl, const QRgb *colortable, int numColors, Endian bitOrder);

#endif

    inline QT3_SUPPORT Endian bitOrder() const {

        Format f = format();

        return f == Format_Mono ? BigEndian : (f == Format_MonoLSB ? LittleEndian : IgnoreEndian);

    }

    QT3_SUPPORT QImage convertDepth(int, Qt::ImageConversionFlags flags = Qt::AutoColor) const;

    QT3_SUPPORT QImage convertDepthWithPalette(int, QRgb* p, int pc, Qt::ImageConversionFlags flags = Qt::AutoColor) const;

    QT3_SUPPORT QImage convertBitOrder(Endian) const;

    QT3_SUPPORT bool hasAlphaBuffer() const;

    QT3_SUPPORT void setAlphaBuffer(bool);

    QT3_SUPPORT uchar **jumpTable();

    QT3_SUPPORT const uchar * const *jumpTable() const;

    inline QT3_SUPPORT void reset() { *this = QImage(); }

    static inline QT3_SUPPORT Endian systemByteOrder()

        { return QSysInfo::ByteOrder == QSysInfo::BigEndian ? BigEndian : LittleEndian; }

    inline QT3_SUPPORT QImage swapRGB() const { return rgbSwapped(); }

    inline QT3_SUPPORT QImage mirror(bool horizontally = false, bool vertically = true) const

        { return mirrored(horizontally, vertically); }

    QT3_SUPPORT bool create(const QSize&, int depth, int numColors=0, Endian bitOrder=IgnoreEndian);

    QT3_SUPPORT bool create(int width, int height, int depth, int numColors=0, Endian bitOrder=IgnoreEndian);

    inline QT3_SUPPORT QImage xForm(const QMatrix &matrix) const { return transformed(QTransform(matrix)); }

    inline QT3_SUPPORT QImage smoothScale(int w, int h, Qt::AspectRatioMode mode = Qt::IgnoreAspectRatio) const

        { return scaled(QSize(w, h), mode, Qt::SmoothTransformation); }

    inline QImage QT3_SUPPORT smoothScale(const QSize &s, Qt::AspectRatioMode mode = Qt::IgnoreAspectRatio) const

        { return scaled(s, mode, Qt::SmoothTransformation); }

    inline QT3_SUPPORT QImage scaleWidth(int w) const { return scaledToWidth(w); }

    inline QT3_SUPPORT QImage scaleHeight(int h) const { return scaledToHeight(h); }

    inline QT3_SUPPORT void invertPixels(bool invertAlpha) { invertAlpha ? invertPixels(InvertRgba) : invertPixels(InvertRgb); }

    inline QT3_SUPPORT QImage copy(int x, int y, int w, int h, Qt::ImageConversionFlags) const

        { return copy(QRect(x, y, w, h)); }

    inline QT3_SUPPORT QImage copy(const QRect &rect, Qt::ImageConversionFlags) const

        { return copy(rect); }

    static QT3_SUPPORT Endian systemBitOrder();

    inline QT3_SUPPORT_CONSTRUCTOR QImage(const QByteArray &data)

        { d = 0; *this = QImage::fromData(data); }

#endif

protected:

    virtual int metric(PaintDeviceMetric metric) const;

private:

    friend class QWSOnScreenSurface;

    QImageData *d;

    friend class QRasterPixmapData;

    friend class QPixmapCacheEntry;

    friend Q_GUI_EXPORT qint64 qt_image_id(const QImage &image);

    friend const QVector<QRgb> *qt_image_colortable(const QImage &image);

public:

    typedef QImageData * DataPtr;

    inline DataPtr &data_ptr() { return d; }

};

Q_DECLARE_SHARED(QImage)

Q_DECLARE_TYPEINFO(QImage, Q_MOVABLE_TYPE);

// Inline functions...

Q_GUI_EXPORT_INLINE bool QImage::valid(const QPoint &pt) const { return valid(pt.x(), pt.y()); }

Q_GUI_EXPORT_INLINE int QImage::pixelIndex(const QPoint &pt) const { return pixelIndex(pt.x(), pt.y());}

Q_GUI_EXPORT_INLINE QRgb QImage::pixel(const QPoint &pt) const { return pixel(pt.x(), pt.y()); }

Q_GUI_EXPORT_INLINE void QImage::setPixel(const QPoint &pt, uint index_or_rgb) { setPixel(pt.x(), pt.y(), index_or_rgb); }

// QImage stream functions

#if !defined(QT_NO_DATASTREAM)

Q_GUI_EXPORT QDataStream &operator<<(QDataStream &, const QImage &);

Q_GUI_EXPORT QDataStream &operator>>(QDataStream &, QImage &);

#endif

#ifdef QT3_SUPPORT

Q_GUI_EXPORT QT3_SUPPORT void bitBlt(QImage* dst, int dx, int dy, const QImage* src,

                                     int sx=0, int sy=0, int sw=-1, int sh=-1, Qt::ImageConversionFlags flags = Qt::AutoColor);

#endif

QT_END_NAMESPACE

QT_END_HEADER

#endif // QIMAGE_H