<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/src/kernel/qpngio.cpp:653 --> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <title>TQPNGImagePacker Class</title> <style type="text/css"><!-- fn { margin-left: 1cm; text-indent: -1cm; } a:link { color: #004faf; text-decoration: none } a:visited { color: #672967; text-decoration: none } body { background: #ffffff; color: black; } --></style> </head> <body> <table border="0" cellpadding="0" cellspacing="0" width="100%"> <tr bgcolor="#E5E5E5"> <td valign=center> <a href="index.html"> <font color="#004faf">Home</font></a> | <a href="classes.html"> <font color="#004faf">All Classes</font></a> | <a href="mainclasses.html"> <font color="#004faf">Main Classes</font></a> | <a href="annotated.html"> <font color="#004faf">Annotated</font></a> | <a href="groups.html"> <font color="#004faf">Grouped Classes</font></a> | <a href="functions.html"> <font color="#004faf">Functions</font></a> </td> <td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>TQPNGImagePacker Class Reference</h1> <p>The TQPNGImagePacker class creates well-compressed PNG animations. <a href="#details">More...</a> <p><tt>#include <<a href="qpngio-h.html">ntqpngio.h</a>></tt> <p><a href="qpngimagepacker-members.html">List of all member functions.</a> <h2>Public Members</h2> <ul> <li class=fn><a href="#TQPNGImagePacker"><b>TQPNGImagePacker</b></a> ( TQIODevice * iod, int storage_depth, int conversionflags )</li> <li class=fn>void <a href="#setPixelAlignment"><b>setPixelAlignment</b></a> ( int x )</li> <li class=fn>bool <a href="#packImage"><b>packImage</b></a> ( const TQImage & img )</li> </ul> <hr><a name="details"></a><h2>Detailed Description</h2> The TQPNGImagePacker class creates well-compressed PNG animations. <p> <p> By using transparency, TQPNGImagePacker allows you to build a PNG image from a sequence of TQImages. <p> Images are added using <a href="#packImage">packImage</a>(). <p>See also <a href="graphics.html">Graphics Classes</a> and <a href="images.html">Image Processing Classes</a>. <hr><h2>Member Function Documentation</h2> <h3 class=fn><a name="TQPNGImagePacker"></a>TQPNGImagePacker::TQPNGImagePacker ( <a href="ntqiodevice.html">TQIODevice</a> * iod, int storage_depth, int conversionflags ) </h3> Creates an image packer that writes PNG data to IO device <em>iod</em> using a <em>storage_depth</em> bit encoding (use 8 or 32, depending on the desired quality and compression requirements). <p> 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 <em>conversionflags</em> to specify how you'd prefer this to happen. <p> <p>See also <a href="ntqt.html#ImageConversionFlags-enum">TQt::ImageConversionFlags</a>. <h3 class=fn>bool <a name="packImage"></a>TQPNGImagePacker::packImage ( const <a href="ntqimage.html">TQImage</a> & img ) </h3> Adds the image <em>img</em> to the PNG animation, analyzing the differences between this and the previous image to improve compression. <h3 class=fn>void <a name="setPixelAlignment"></a>TQPNGImagePacker::setPixelAlignment ( int x ) </h3> Aligns pixel differences to <em>x</em> pixels. For example, using 8 can improve playback on certain hardware. Normally the default of 1-pixel alignment (i.e. no alignment) gives better compression and performance. <!-- eof --> <hr><p> This file is part of the <a href="index.html">TQt toolkit</a>. Copyright © 1995-2007 <a href="http://www.trolltech.com/">Trolltech</a>. All Rights Reserved.<p><address><hr><div align=center> <table width=100% cellspacing=0 border=0><tr> <td>Copyright © 2007 <a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a> <td align=right><div align=right>TQt 3.3.8</div> </table></div></address></body> </html>