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This is an automatically generated e-mail. To reply, visit:
<a href="http://svn.reviewboard.kde.org/r/6109/">http://svn.reviewboard.kde.org/r/6109/</a>
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<a href="http://svn.reviewboard.kde.org/r/6109/diff/1/?file=42508#file42508line20" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/KDE/kdeedu/marble/src/lib/FastMercatorTextureMapper.h</a>
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(Diff revision 1)
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<td colspan="2"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td>
<td colspan="2"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">namespace Marble</pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="n">class</span> <span class="n">FastMercatorTextureMapper</span> <span class="o">:</span> <span class="n">public</span> <span class="n">AbstractScanlineTextureMapper</span></pre></td>
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<pre style="margin-left: 2em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">"Fast" doesn't really provide an idea how this works.</pre>
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<a href="http://svn.reviewboard.kde.org/r/6109/diff/1/?file=42509#file42509line76" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/KDE/kdeedu/marble/src/lib/FastMercatorTextureMapper.cpp</a>
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(Diff revision 1)
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<td colspan="2"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">void FastMercatorTextureMapper::mapTexture( ViewParams *viewParams )</pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">const</span> <span class="kt">int</span> <span class="n">xLeft</span> <span class="o">=</span> <span class="p">(</span> <span class="mf">4.0</span> <span class="o">*</span> <span class="n">radius</span> <span class="p">)</span> <span class="o">*</span> <span class="p">(</span> <span class="p">(</span> <span class="n">tileX</span> <span class="p">)</span> <span class="o">/</span> <span class="p">(</span><span class="n">qreal</span><span class="p">)</span><span class="n">numTilesX</span> <span class="o">-</span> <span class="n">xNormalizedCenter</span> <span class="o">+</span> <span class="n">imageWidth</span><span class="o">/</span><span class="p">(</span> <span class="mf">8.0</span> <span class="o">*</span> <span class="n">radius</span> <span class="p">)</span> <span class="p">);</span></pre></td>
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<pre style="margin-left: 2em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">waht happens if numTilesX or -Y or radius becomes 0 ? :)</pre>
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<p>- Torsten</p>
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<p>On December 12th, 2010, 11:11 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 2010-12-12 23:11:04</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; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">This patch introduces an optimized code path for the case that both the tile projection and the map projection are of type Mercator. In this very common case, the tiles can be scaled rather than reprojected, promising a significant speedup. Moreover, it seems to avoid crashes in high zoom levels on the N900.</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; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">I have measured speedups of up to 2.7 on my system. This seems to depend on the QImage::Format, so format conversion should be avoided in a future version if possible.
The image quality is roughly of outline quality when a discrete zoom level isn't hit.</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/AbstractScanlineTextureMapper.h <span style="color: grey">(1205882)</span></li>
<li>/trunk/KDE/kdeedu/marble/src/lib/AbstractScanlineTextureMapper.cpp <span style="color: grey">(1205882)</span></li>
<li>/trunk/KDE/kdeedu/marble/src/lib/CMakeLists.txt <span style="color: grey">(1205882)</span></li>
<li>/trunk/KDE/kdeedu/marble/src/lib/FastMercatorTextureMapper.h <span style="color: grey">(PRE-CREATION)</span></li>
<li>/trunk/KDE/kdeedu/marble/src/lib/FastMercatorTextureMapper.cpp <span style="color: grey">(PRE-CREATION)</span></li>
<li>/trunk/KDE/kdeedu/marble/src/lib/TextureLayer.cpp <span style="color: grey">(1205882)</span></li>
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<p><a href="http://svn.reviewboard.kde.org/r/6109/diff/" style="margin-left: 3em;">View Diff</a></p>
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