1 /****************************************************************************
2 **
3 ** Copyright (C) 2016 The Qt Company Ltd.
4 ** Contact: https://www.qt.io/licensing/
5 **
6 ** This file is part of the documentation of the Qt Toolkit.
7 **
8 ** $QT_BEGIN_LICENSE:BSD$
9 ** Commercial License Usage
10 ** Licensees holding valid commercial Qt licenses may use this file in
11 ** accordance with the commercial license agreement provided with the
12 ** Software or, alternatively, in accordance with the terms contained in
13 ** a written agreement between you and The Qt Company. For licensing terms
14 ** and conditions see https://www.qt.io/terms-conditions. For further
15 ** information use the contact form at https://www.qt.io/contact-us.
16 **
17 ** BSD License Usage
18 ** Alternatively, you may use this file under the terms of the BSD license
19 ** as follows:
20 **
21 ** "Redistribution and use in source and binary forms, with or without
22 ** modification, are permitted provided that the following conditions are
23 ** met:
24 ** * Redistributions of source code must retain the above copyright
25 ** notice, this list of conditions and the following disclaimer.
26 ** * Redistributions in binary form must reproduce the above copyright
27 ** notice, this list of conditions and the following disclaimer in
28 ** the documentation and/or other materials provided with the
29 ** distribution.
30 ** * Neither the name of The Qt Company Ltd nor the names of its
31 ** contributors may be used to endorse or promote products derived
32 ** from this software without specific prior written permission.
33 **
34 **
35 ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
36 ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
37 ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
38 ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
39 ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
40 ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
41 ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
42 ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
43 ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
44 ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
45 ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
46 **
47 ** $QT_END_LICENSE$
48 **
49 ****************************************************************************/
50
51 #include <QtGui>
52
main()53 int main()
54 {
55 int x, y;
56 {
57 // BIT ACCESS
58 QImage image;
59 // sets bit at (x, y) to 1
60 if (image.format() == QImage::Format_MonoLSB)
61 image.scanLine(y)[x >> 3] |= 1 << (x & 7);
62 else
63 image.scanLine(y)[x >> 3] |= 1 << (7 - (x & 7));
64 }
65
66 {
67 // 8-BIT ACCESS
68 QImage image;
69 // set entry 19 in the color table to yellow
70 image.setColor(19, qRgb(255, 255, 0));
71
72 // set 8 bit pixel at (x,y) to value yellow (in color table)
73 image.scanLine(y)[x] = 19;
74 }
75
76 {
77 // 32-BIT
78 QImage image;
79 // sets 32 bit pixel at (x,y) to yellow.
80 uint *ptr = reinterpret_cast<uint *>(image.scanLine(y)) + x;
81 *ptr = qRgb(255, 255, 0);
82 }
83
84 {
85 // SAVE
86 //! [0]
87 QImage image;
88 QByteArray ba;
89 QBuffer buffer(&ba);
90 buffer.open(QIODevice::WriteOnly);
91 image.save(&buffer, "PNG"); // writes image into ba in PNG format
92 //! [0]
93 }
94
95 {
96 // PIX SAVE
97 //! [1]
98 QPixmap pixmap;
99 QByteArray bytes;
100 QBuffer buffer(&bytes);
101 buffer.open(QIODevice::WriteOnly);
102 pixmap.save(&buffer, "PNG"); // writes pixmap into bytes in PNG format
103 //! [1]
104 }
105
106 {
107 // MASK
108 //! [2]
109 QPixmap alpha("image-with-alpha.png");
110 QPixmap alphacopy = alpha;
111 alphacopy.setMask(alphacopy.mask());
112 //! [2]
113 }
114 }
115