qpixmap.h
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上传日期:2022-06-22
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- /****************************************************************************
- **
- ** Copyright (C) 2008 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.
- **
- ** Commercial Usage
- ** Licensees holding valid Qt Commercial licenses may use this file in
- ** accordance with the Qt Commercial License Agreement provided with the
- ** Software or, alternatively, in accordance with the terms contained in
- ** a written agreement between you and Nokia.
- **
- **
- ** GNU General Public License Usage
- ** Alternatively, this file may be used under the terms of the GNU
- ** General Public License versions 2.0 or 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 GNU General Public Licensing requirements will be met:
- ** http://www.fsf.org/licensing/licenses/info/GPLv2.html and
- ** http://www.gnu.org/copyleft/gpl.html. In addition, as a special
- ** exception, Nokia gives you certain additional rights. These rights
- ** are described in the Nokia Qt GPL Exception version 1.3, included in
- ** the file GPL_EXCEPTION.txt in this package.
- **
- ** Qt for Windows(R) Licensees
- ** As a special exception, Nokia, as the sole copyright holder for Qt
- ** Designer, grants users of the Qt/Eclipse Integration plug-in the
- ** right for the Qt/Eclipse Integration to link to functionality
- ** provided by Qt Designer and its related libraries.
- **
- ** If you are unsure which license is appropriate for your use, please
- ** contact the sales department at qt-sales@nokia.com.
- **
- ****************************************************************************/
- #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 <QtGui/qimage.h>
- #include <QtGui/qtransform.h>
- QT_BEGIN_HEADER
- QT_BEGIN_NAMESPACE
- QT_MODULE(Gui)
- class QImageWriter;
- class QColor;
- class QVariant;
- class QX11Info;
- 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;
- int devType() const;
- int width() const;
- int height() const;
- 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);
- 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;
- #if defined(Q_WS_WIN)
- enum HBitmapFormat {
- NoAlpha,
- PremultipliedAlpha
- };
- HBITMAP toWinHBITMAP(HBitmapFormat format = NoAlpha) const;
- static QPixmap fromWinHBITMAP(HBITMAP hbitmap, HBitmapFormat format = NoAlpha);
- #endif
- #if defined(Q_WS_MAC)
- CGImageRef toMacCGImageRef() const;
- static QPixmap fromMacCGImageRef(CGImageRef image);
- #endif
- inline QPixmap copy(int x, int y, int width, int height) const;
- QPixmap copy(const QRect &rect = QRect()) const;
- int serialNumber() const;
- qint64 cacheKey() const;
- bool isDetached() const;
- void detach();
- inline bool isQBitmap() const { return depth() == 1; }
- #if defined(Q_WS_QWS)
- const uchar *qwsBits() const;
- int qwsBytesPerLine() const;
- QRgb *clut() const;
- int numCols() const;
- #elif defined(Q_WS_MAC)
- Qt::HANDLE macQDHandle() const;
- Qt::HANDLE macQDAlphaHandle() const;
- Qt::HANDLE macCGHandle() const;
- #elif defined(Q_WS_X11)
- static int x11SetDefaultScreen(int screen);
- void x11SetScreen(int screen);
- const QX11Info &x11Info() const;
- Qt::HANDLE x11PictureHandle() const;
- #endif
- #if defined(Q_WS_X11) || defined(Q_WS_QWS)
- Qt::HANDLE handle() const;
- #endif
- QPaintEngine *paintEngine() const;
- inline bool operator!() const { return isNull(); }
- protected:
- int metric(PaintDeviceMetric) const;
- #ifdef QT3_SUPPORT
- public:
- enum ColorMode { Auto, Color, Mono };
- QT3_SUPPORT_CONSTRUCTOR QPixmap(const QString& fileName, const char *format, ColorMode mode);
- QT3_SUPPORT bool load(const QString& fileName, const char *format, ColorMode mode);
- QT3_SUPPORT bool loadFromData(const uchar *buf, uint len, const char* format, ColorMode mode);
- QT3_SUPPORT_CONSTRUCTOR QPixmap(const QImage& image);
- QT3_SUPPORT QPixmap &operator=(const QImage &);
- inline QT3_SUPPORT QImage convertToImage() const { return toImage(); }
- QT3_SUPPORT bool convertFromImage(const QImage &, ColorMode mode);
- QT3_SUPPORT bool convertFromImage(const QImage &img, Qt::ImageConversionFlags flags = Qt::AutoColor)
- { (*this) = fromImage(img, flags); return !isNull(); }
- inline QT3_SUPPORT operator QImage() const { return toImage(); }
- inline QT3_SUPPORT QPixmap xForm(const QMatrix &matrix) const { return transformed(QTransform(matrix)); }
- inline QT3_SUPPORT bool selfMask() const { return false; }
- private:
- void resize_helper(const QSize &s);
- public:
- inline QT3_SUPPORT void resize(const QSize &s) { resize_helper(s); }
- inline QT3_SUPPORT void resize(int width, int height) { resize_helper(QSize(width, height)); }
- #endif
- private:
- QPixmapData *data;
- bool doImageIO(QImageWriter *io, int quality) const;
- // ### Qt5: remove the following three lines
- enum Type { PixmapType, BitmapType }; // must match QPixmapData::PixelType
- QPixmap(const QSize &s, Type);
- void init(int, int, Type = PixmapType);
- QPixmap(const QSize &s, int type);
- void init(int, int, int);
- void deref();
- #if defined(Q_WS_WIN)
- void initAlphaPixmap(uchar *bytes, int length, struct tagBITMAPINFO *bmi);
- #endif
- Q_DUMMY_COMPARISON_OPERATOR(QPixmap)
- #ifdef Q_WS_MAC
- friend CGContextRef qt_mac_cg_context(const QPaintDevice*);
- friend CGImageRef qt_mac_create_imagemask(const QPixmap&, const QRectF&);
- friend IconRef qt_mac_create_iconref(const QPixmap&);
- friend QPixmap qt_mac_unmultiplyPixmapAlpha(const QPixmap&);
- friend quint32 *qt_mac_pixmap_get_base(const QPixmap*);
- friend int qt_mac_pixmap_get_bytes_per_line(const QPixmap*);
- #endif
- friend class QPixmapData;
- friend class QX11PixmapData;
- friend class QMacPixmapData;
- friend class QBitmap;
- friend class QPaintDevice;
- friend class QPainter;
- friend class QGLWidget;
- friend class QX11PaintEngine;
- friend class QCoreGraphicsPaintEngine;
- friend class QWidgetPrivate;
- friend class QRasterPaintEngine;
- friend class QRasterBuffer;
- friend class QDirect3DPaintEngine;
- friend class QDirect3DPaintEnginePrivate;
- friend class QDetachedPixmap;
- #if !defined(QT_NO_DATASTREAM)
- friend Q_GUI_EXPORT QDataStream &operator>>(QDataStream &, QPixmap &);
- #endif
- friend Q_GUI_EXPORT qint64 qt_pixmap_id(const QPixmap &pixmap);
- public:
- QPixmapData* pixmapData() const;
- public:
- typedef QPixmapData * DataPtr;
- inline DataPtr &data_ptr() { return data; }
- };
- Q_DECLARE_SHARED(QPixmap)
- inline QPixmap QPixmap::copy(int ax, int ay, int awidth, int aheight) const
- {
- return copy(QRect(ax, ay, awidth, aheight));
- }
- inline bool QPixmap::loadFromData(const QByteArray &buf, const char *format,
- Qt::ImageConversionFlags flags)
- {
- return loadFromData(reinterpret_cast<const uchar *>(buf.constData()), buf.size(), format, flags);
- }
- /*****************************************************************************
- QPixmap stream functions
- *****************************************************************************/
- #if !defined(QT_NO_DATASTREAM)
- Q_GUI_EXPORT QDataStream &operator<<(QDataStream &, const QPixmap &);
- Q_GUI_EXPORT QDataStream &operator>>(QDataStream &, QPixmap &);
- #endif
- /*****************************************************************************
- QPixmap (and QImage) helper functions
- *****************************************************************************/
- #ifdef QT3_SUPPORT
- QT3_SUPPORT Q_GUI_EXPORT void copyBlt(QPixmap *dst, int dx, int dy, const QPixmap *src,
- int sx=0, int sy=0, int sw=-1, int sh=-1);
- #endif // QT3_SUPPORT
- QT_END_NAMESPACE
- QT_END_HEADER
- #endif // QPIXMAP_H