1QPNGImagePacker(3qt)                                      QPNGImagePacker(3qt)
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NAME

6       QPNGImagePacker - Creates well-compressed PNG animations
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SYNOPSIS

9       #include <qpngio.h>
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11   Public Members
12       QPNGImagePacker ( QIODevice * iod, int storage_depth, int
13           conversionflags )
14       void setPixelAlignment ( int x )
15       bool packImage ( const QImage & img )
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DESCRIPTION

18       The QPNGImagePacker class creates well-compressed PNG animations.
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20       By using transparency, QPNGImagePacker allows you to build a PNG image
21       from a sequence of QImages.
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23       Images are added using packImage().
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25       See also Graphics Classes and Image Processing Classes.
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MEMBER FUNCTION DOCUMENTATION

QPNGImagePacker::QPNGImagePacker ( QIODevice * iod, int storage_depth, int
29       conversionflags )
30       Creates an image packer that writes PNG data to IO device iod using a
31       storage_depth bit encoding (use 8 or 32, depending on the desired
32       quality and compression requirements).
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34       If the image needs to be modified to fit in a lower-resolution result
35       (e.g. converting from 32-bit to 8-bit), use the conversionflags to
36       specify how you'd prefer this to happen.
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38       See also Qt::ImageConversionFlags.
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bool QPNGImagePacker::packImage ( const QImage & img )
41       Adds the image img to the PNG animation, analyzing the differences
42       between this and the previous image to improve compression.
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void QPNGImagePacker::setPixelAlignment ( int x )
45       Aligns pixel differences to x pixels. For example, using 8 can improve
46       playback on certain hardware. Normally the default of 1-pixel alignment
47       (i.e. no alignment) gives better compression and performance.
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SEE ALSO
51       http://doc.trolltech.com/qpngimagepacker.html
52       http://www.trolltech.com/faq/tech.html
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55       Copyright 1992-2007 Trolltech ASA, http://www.trolltech.com.  See the
56       license file included in the distribution for a complete license
57       statement.
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AUTHOR
60       Generated automatically from the source code.
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BUGS
63       If you find a bug in Qt, please report it as described in
64       http://doc.trolltech.com/bughowto.html.  Good bug reports help us to
65       help you. Thank you.
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67       The definitive Qt documentation is provided in HTML format; it is
68       located at $QTDIR/doc/html and can be read using Qt Assistant or with a
69       web browser. This man page is provided as a convenience for those users
70       who prefer man pages, although this format is not officially supported
71       by Trolltech.
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73       If you find errors in this manual page, please report them to qt-
74       bugs@trolltech.com.  Please include the name of the manual page
75       (qpngimagepacker.3qt) and the Qt version (3.3.8).
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79Trolltech AS                    2 February 2007           QPNGImagePacker(3qt)



        

    


            
        

        

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