1 /****************************************************************************

     2 **

     3 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

     4 ** All rights reserved.

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

     6 **

     7 ** This file is part of the documentation of the Qt Toolkit.

     8 **

     9 ** $QT_BEGIN_LICENSE:LGPL$

    10 ** No Commercial Usage

    11 ** This file contains pre-release code and may not be distributed.

    12 ** You may use this file in accordance with the terms and conditions

    13 ** contained in the Technology Preview License Agreement accompanying

    14 ** this package.

    15 **

    16 ** GNU Lesser General Public License Usage

    17 ** Alternatively, this file may be used under the terms of the GNU Lesser

    18 ** General Public License version 2.1 as published by the Free Software

    19 ** Foundation and appearing in the file LICENSE.LGPL included in the

    20 ** packaging of this file.  Please review the following information to

    21 ** ensure the GNU Lesser General Public License version 2.1 requirements

    22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

    23 **

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

    25 ** rights.  These rights are described in the Nokia Qt LGPL Exception

    26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

    27 **

    28 ** If you have questions regarding the use of this file, please contact

    29 ** Nokia at qt-info@nokia.com.

    30 **

    31 **

    32 **

    33 **

    34 **

    35 **

    36 **

    37 **

    38 ** $QT_END_LICENSE$

    39 **

    40 ****************************************************************************/

    41 

    42 #include <QtGui>

    43 

    44 int main()

    45 {

    46     int x, y;

    47     {

    48         // BIT ACCESS

    49         QImage image;

    50         // sets bit at (x, y) to 1

    51         if (image.format() == QImage::Format_MonoLSB)

    52             image.scanLine(y)[x >> 3] |= 1 << (x & 7);

    53         else

    54             image.scanLine(y)[x >> 3] |= 1 << (7 - (x & 7));

    55     }

    56 

    57     {

    58         // 8-BIT ACCESS

    59         QImage image;

    60         // set entry 19 in the color table to yellow

    61         image.setColor(19, qRgb(255, 255, 0));

    62 

    63         // set 8 bit pixel at (x,y) to value yellow (in color table)

    64         image.scanLine(y)[x] = 19;

    65     }

    66 

    67     {

    68         // 32-BIT

    69         QImage image;

    70         // sets 32 bit pixel at (x,y) to yellow.

    71         uint *ptr = reinterpret_cast<uint *>(image.scanLine(y)) + x;

    72         *ptr = qRgb(255, 255, 0);

    73     }

    74 

    75     {

    76         // SAVE

    77 //! [0]

    78         QImage image;

    79         QByteArray ba;

    80         QBuffer buffer(&ba);

    81         buffer.open(QIODevice::WriteOnly);

    82         image.save(&buffer, "PNG"); // writes image into ba in PNG format

    83 //! [0]

    84     }

    85 

    86     {

    87         // PIX SAVE

    88 //! [1]

    89         QPixmap pixmap;

    90         QByteArray bytes;

    91         QBuffer buffer(&bytes);

    92         buffer.open(QIODevice::WriteOnly);

    93         pixmap.save(&buffer, "PNG"); // writes pixmap into bytes in PNG format

    94 //! [1]

    95     }

    96 

    97     {

    98         // MASK

    99 //! [2]

   100         QPixmap alpha("image-with-alpha.png");

   101         QPixmap alphacopy = alpha;

   102         alphacopy.setMask(alphacopy.mask());

   103 //! [2]

   104     }

   105 }