source: trunk/src/gui/image/qpixmap.h@ 1014

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#ifndef QPIXMAP_H
#define QPIXMAP_H

#include <QtGui/qpaintdevice.h>
#include <QtGui/qcolor.h>
#include <QtCore/qnamespace.h>
#include <QtCore/qstring.h> // char*->QString conversion
#include <QtCore/qsharedpointer.h>
#include <QtGui/qimage.h>
#include <QtGui/qtransform.h>

QT_BEGIN_HEADER

#if defined(Q_OS_SYMBIAN)
class CFbsBitmap;
class RSgImage;
#endif

QT_BEGIN_NAMESPACE

QT_MODULE(Gui)

class QImageWriter;
class QImageReader;
class QColor;
class QVariant;
class QX11Info;

#if defined(Q_WS_PM)
class QIcon;
#endif

class QPixmapData;

class Q_GUI_EXPORT QPixmap : public QPaintDevice
{
public:
    QPixmap();
    explicit QPixmap(QPixmapData *data);
    QPixmap(int w, int h);
    QPixmap(const QSize &);
    QPixmap(const QString& fileName, const char *format = 0, Qt::ImageConversionFlags flags = Qt::AutoColor);
#ifndef QT_NO_IMAGEFORMAT_XPM
    QPixmap(const char * const xpm[]);
#endif
    QPixmap(const QPixmap &);
    ~QPixmap();

    QPixmap &operator=(const QPixmap &);
    operator QVariant() const;

    bool isNull() const; // ### Qt 5: make inline
    int devType() const;

    int width() const; // ### Qt 5: make inline
    int height() const; // ### Qt 5: make inline
    QSize size() const;
    QRect rect() const;
    int depth() const;

    static int defaultDepth();

    void fill(const QColor &fillColor = Qt::white);
    void fill(const QWidget *widget, const QPoint &ofs);
    inline void fill(const QWidget *widget, int xofs, int yofs) { fill(widget, QPoint(xofs, yofs)); }

    QBitmap mask() const;
    void setMask(const QBitmap &);

    QPixmap alphaChannel() const;
    void setAlphaChannel(const QPixmap &);

    bool hasAlpha() const;
    bool hasAlphaChannel() const;

#ifndef QT_NO_IMAGE_HEURISTIC_MASK
    QBitmap createHeuristicMask(bool clipTight = true) const;
#endif
    QBitmap createMaskFromColor(const QColor &maskColor) const; // ### Qt 5: remove
    QBitmap createMaskFromColor(const QColor &maskColor, Qt::MaskMode mode) const;

    static QPixmap grabWindow(WId, int x=0, int y=0, int w=-1, int h=-1);
    static QPixmap grabWidget(QWidget *widget, const QRect &rect);
    static inline QPixmap grabWidget(QWidget *widget, int x=0, int y=0, int w=-1, int h=-1)
    { return grabWidget(widget, QRect(x, y, w, h)); }


    inline QPixmap scaled(int w, int h, Qt::AspectRatioMode aspectMode = Qt::IgnoreAspectRatio,
                          Qt::TransformationMode mode = Qt::FastTransformation) const
        { return scaled(QSize(w, h), aspectMode, mode); }
    QPixmap scaled(const QSize &s, Qt::AspectRatioMode aspectMode = Qt::IgnoreAspectRatio,
                   Qt::TransformationMode mode = Qt::FastTransformation) const;
    QPixmap scaledToWidth(int w, Qt::TransformationMode mode = Qt::FastTransformation) const;
    QPixmap scaledToHeight(int h, Qt::TransformationMode mode = Qt::FastTransformation) const;
    QPixmap transformed(const QMatrix &, Qt::TransformationMode mode = Qt::FastTransformation) const;
    static QMatrix trueMatrix(const QMatrix &m, int w, int h);
    QPixmap transformed(const QTransform &, Qt::TransformationMode mode = Qt::FastTransformation) const;
    static QTransform trueMatrix(const QTransform &m, int w, int h);

    QImage toImage() const;
    static QPixmap fromImage(const QImage &image, Qt::ImageConversionFlags flags = Qt::AutoColor);
    static QPixmap fromImageReader(QImageReader *imageReader, Qt::ImageConversionFlags flags = Qt::AutoColor);

    bool load(const QString& fileName, const char *format = 0, Qt::ImageConversionFlags flags = Qt::AutoColor);
    bool loadFromData(const uchar *buf, uint len, const char* format = 0, Qt::ImageConversionFlags flags = Qt::AutoColor);
    inline bool loadFromData(const QByteArray &data, const char* format = 0, Qt::ImageConversionFlags flags = Qt::AutoColor);
    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;

    bool convertFromImage(const QImage &img, Qt::ImageConversionFlags flags = Qt::AutoColor);

#if defined(Q_WS_WIN)
    enum HBitmapFormat {
        NoAlpha,
        PremultipliedAlpha,
        Alpha
    };

    HBITMAP toWinHBITMAP(HBitmapFormat format = NoAlpha) const;
    HICON toWinHICON() const;

    static QPixmap fromWinHBITMAP(HBITMAP hbitmap, HBitmapFormat format = NoAlpha);
    static QPixmap fromWinHICON(HICON hicon);