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This is an automatically generated e-mail. To reply, visit:
<a href="http://reviewboard.kde.org/r/4444/">http://reviewboard.kde.org/r/4444/</a>
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<p style="margin-top: 0;">On June 25th, 2010, 1:05 p.m., <b>jmho</b> wrote:</p>
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<a href="/r/4444/diff/2/?file=29757#file29757line207" style="color: black; font-weight: bold; text-decoration: underline;">trunk/KDE/kdeedu/marble/src/lib/TileLoader.cpp</a>
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(Diff revision 2)
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<td colspan="2"><pre style="font-size: 8pt; line-height: 140%; margin: 0; white-space: pre-wrap; word-wrap: break-word;">QImage * TileLoader::scaledLowerLevelTile( TileId const & id )</pre></td>
<td colspan="2"><pre style="font-size: 8pt; line-height: 140%; margin: 0; white-space: pre-wrap; word-wrap: break-word;">QImage TileLoader::scaledLowerLevelTile( TileId const & id )</pre></td>
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<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; white-space: pre-wrap; word-wrap: break-word;"><span class="n">QImage</span><span class="hl"> </span><span class="o"><span class="hl">*</span></span> <span class="n">TileLoader</span><span class="o">::</span><span class="n">scaledLowerLevelTile</span><span class="p">(</span> <span class="n">TileId</span> <span class="k">const</span> <span class="o">&</span> <span class="n">id</span> <span class="p">)</span></pre></td>
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<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; white-space: pre-wrap; word-wrap: break-word;"><span class="n">QImage</span> <span class="n">TileLoader</span><span class="o">::</span><span class="n">scaledLowerLevelTile</span><span class="p">(</span> <span class="n">TileId</span> <span class="k">const</span> <span class="o">&</span> <span class="n">id</span> <span class="p">)</span></pre></td>
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<pre>This now returns a copy. Is this really necessary? Could we not try to not copy QImages at all?</pre>
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<p>On June 25th, 2010, 1:17 p.m., <b>Torsten Rahn</b> wrote:</p>
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<pre>Does it create a deep copy or a shallow copy? Where does the detach happen? :-)</pre>
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<p>On June 25th, 2010, 1:19 p.m., <b>Bernhard Beschow</b> wrote:</p>
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<pre>As explained above, copying a QImage is very fast. Why not use the convenience that QImage provides?</pre>
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<pre style="margin-left: 1em">@Torsten: It creates a shallow copy. The detach happens when TextureTile::setImage() is called.</pre>
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<p>- Bernhard</p>
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<p>On June 25th, 2010, 12:49 p.m., Bernhard Beschow wrote:</p>
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<div>Review request for marble.</div>
<div>By Bernhard Beschow.</div>
<p style="color: grey;"><i>Updated 2010-06-25 12:49:24</i></p>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Description </h1>
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<pre style="margin: 0; padding: 0;">Motivation: It may happen that Marble receives invalid image data over the network or loads invalid image data from disk, making Marble really slow. This is caused by heavy debug output from QImage while Marble tries to access invalid image data. This will be qFatal in the upcoming Qt 4.7.
Solution: Check if the image is valid ater loading data into a QImage instead of blindly loading data into it. Also Q_ASSERT every image assignment in TextureTile.
Note that by this patch, Marble will abort when TileLoader::scaledLowerLevelTile() is not able to produce a scaled image. This could happen when the level-zero tile is missing.</pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Testing </h1>
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<pre style="margin: 0; padding: 0;">Works for me. Please test if it works for you as well!</pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
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<li>trunk/KDE/kdeedu/marble/src/lib/TextureTile.h <span style="color: grey">(1142673)</span></li>
<li>trunk/KDE/kdeedu/marble/src/lib/TextureTile.cpp <span style="color: grey">(1142673)</span></li>
<li>trunk/KDE/kdeedu/marble/src/lib/TileLoader.h <span style="color: grey">(1142673)</span></li>
<li>trunk/KDE/kdeedu/marble/src/lib/TileLoader.cpp <span style="color: grey">(1142673)</span></li>
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<p><a href="http://reviewboard.kde.org/r/4444/diff/" style="margin-left: 3em;">View Diff</a></p>
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