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73 lines
2.8 KiB
73 lines
2.8 KiB
13 years ago
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'\" t
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.TH QPNGImagePacker 3qt "2 February 2007" "Trolltech AS" \" -*- nroff -*-
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.\" Copyright 1992-2007 Trolltech ASA. All rights reserved. See the
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.\" license file included in the distribution for a complete license
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.\" statement.
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.\"
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.ad l
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.nh
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.SH NAME
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QPNGImagePacker \- Creates well-compressed PNG animations
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.SH SYNOPSIS
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\fC#include <qpngio.h>\fR
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.PP
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.SS "Public Members"
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.in +1c
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.ti -1c
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.BI "\fBQPNGImagePacker\fR ( QIODevice * iod, int storage_depth, int conversionflags )"
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.br
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.ti -1c
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.BI "void \fBsetPixelAlignment\fR ( int x )"
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.br
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.ti -1c
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.BI "bool \fBpackImage\fR ( const QImage & img )"
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.br
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.in -1c
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.SH DESCRIPTION
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The QPNGImagePacker class creates well-compressed PNG animations.
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.PP
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By using transparency, QPNGImagePacker allows you to build a PNG image from a sequence of QImages.
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.PP
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Images are added using packImage().
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.PP
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See also Graphics Classes and Image Processing Classes.
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.SH MEMBER FUNCTION DOCUMENTATION
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.SH "QPNGImagePacker::QPNGImagePacker ( QIODevice * iod, int storage_depth, int conversionflags )"
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Creates an image packer that writes PNG data to IO device \fIiod\fR using a \fIstorage_depth\fR bit encoding (use 8 or 32, depending on the desired quality and compression retquirements).
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.PP
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If the image needs to be modified to fit in a lower-resolution result (e.g. converting from 32-bit to 8-bit), use the \fIconversionflags\fR to specify how you'd prefer this to happen.
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.PP
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See also Qt::ImageConversionFlags.
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.SH "bool QPNGImagePacker::packImage ( const QImage & img )"
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Adds the image \fIimg\fR to the PNG animation, analyzing the differences between this and the previous image to improve compression.
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.SH "void QPNGImagePacker::setPixelAlignment ( int x )"
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Aligns pixel differences to \fIx\fR pixels. For example, using 8 can
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improve playback on certain hardware. Normally the default of
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1-pixel alignment (i.e. no alignment) gives better compression and
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performance.
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.SH "SEE ALSO"
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.BR http://doc.trolltech.com/qpngimagepacker.html
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.BR http://www.trolltech.com/faq/tech.html
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.SH COPYRIGHT
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Copyright 1992-2007 Trolltech ASA, http://www.trolltech.com. See the
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license file included in the distribution for a complete license
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statement.
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.SH AUTHOR
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Generated automatically from the source code.
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.SH BUGS
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If you find a bug in Qt, please report it as described in
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.BR http://doc.trolltech.com/bughowto.html .
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Good bug reports help us to help you. Thank you.
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.P
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The definitive Qt documentation is provided in HTML format; it is
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located at $QTDIR/doc/html and can be read using Qt Assistant or with
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a web browser. This man page is provided as a convenience for those
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users who prefer man pages, although this format is not officially
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supported by Trolltech.
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.P
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If you find errors in this manual page, please report them to
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.BR qt-bugs@trolltech.com .
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Please include the name of the manual page (qpngimagepacker.3qt) and the Qt
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version (3.3.8).
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