summaryrefslogtreecommitdiffstats
path: root/src/gui/image/qimage.h
blob: 849f731f5ee72b3f9c9da7737f1eb52b4348ced5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** 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 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 &);
#ifdef Q_COMPILER_RVALUE_REFS
    inline QImage &operator=(QImage &&other)
    { qSwap(d, other.d); return *this; }
#endif
    inline void swap(QImage &other) { qSwap(d, other.d); }

    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;
    int bitPlaneCount() 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;
    const uchar *constBits() const;
#ifdef QT_DEPRECATED
    QT_DEPRECATED int numBytes() const;
#endif
    int byteCount() const;

    uchar *scanLine(int);
    const uchar *scanLine(int) const;
    const uchar *constScanLine(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);
    void fill(const QColor &color);
    void fill(Qt::GlobalColor color);


    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

protected:
    virtual int metric(PaintDeviceMetric metric) const;

private:
    friend class QWSOnScreenSurface;
    QImageData *d;

    friend class QRasterPixmapData;
    friend class QBlittablePixmapData;
    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

QT_END_NAMESPACE

QT_END_HEADER

#endif // QIMAGE_H