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TudyBert

434 bytes removed, 10:49, 19 April 2013
→‎Assignment 1 Revisted
<div>
 
<pre style='color:#000000;background:#ffffff;'><html><body style='color:#000000; background:#ffffff; '><pre>
 
<span style='color:#800000; font-weight:bold; '>void</span> Image<span style='color:#800080; '>::</span><span style='color:#800000; font-weight:bold; '>operator</span><span style='color:#808030; '>=</span><span style='color:#808030; '>(</span><span style='color:#800000; font-weight:bold; '>const</span> Image<span style='color:#808030; '>&amp;</span> oldImage<span style='color:#808030; '>)</span>
 
<span style='color:#696969; '>/*copies oldImage into whatever you = it to*/</span>
 
<span style='color:#800080; '>{</span>
 
N <span style='color:#808030; '>=</span> oldImage<span style='color:#808030; '>.</span>N<span style='color:#800080; '>;</span>
 
M <span style='color:#808030; '>=</span> oldImage<span style='color:#808030; '>.</span>M<span style='color:#800080; '>;</span>
 
Q <span style='color:#808030; '>=</span> oldImage<span style='color:#808030; '>.</span>Q<span style='color:#800080; '>;</span>
 
 
<span style='color:#800000; font-weight:bold; '>if</span><span style='color:#808030; '>(</span>dim1 <span style='color:#808030; '>!</span><span style='color:#808030; '>=</span> <span style='color:#7d0045; '>NULL</span><span style='color:#808030; '>)</span>
 
<span style='color:#800080; '>{</span>
 
<span style='color:#800000; font-weight:bold; '>delete</span><span style='color:#808030; '>[</span><span style='color:#808030; '>]</span> dim1<span style='color:#800080; '>;</span>
 
<span style='color:#800080; '>}</span>
 
 
 
pixelVal <span style='color:#808030; '>=</span> <span style='color:#800000; font-weight:bold; '>new</span> <span style='color:#800000; font-weight:bold; '>int</span><span style='color:#808030; '>*</span> <span style='color:#808030; '>[</span>N<span style='color:#808030; '>]</span><span style='color:#800080; '>;</span>
 
dim1 <span style='color:#808030; '>=</span> <span style='color:#800000; font-weight:bold; '>new</span> <span style='color:#800000; font-weight:bold; '>int</span><span style='color:#808030; '>[</span>N<span style='color:#808030; '>*</span>M<span style='color:#808030; '>]</span><span style='color:#800080; '>;</span>
 
 
 
<span style='color:#800000; font-weight:bold; '>for</span><span style='color:#808030; '>(</span><span style='color:#800000; font-weight:bold; '>int</span> i <span style='color:#808030; '>=</span> <span style='color:#008c00; '>0</span><span style='color:#800080; '>;</span> i <span style='color:#808030; '>&lt;</span> N<span style='color:#800080; '>;</span> i<span style='color:#808030; '>+</span><span style='color:#808030; '>+</span><span style='color:#808030; '>)</span>
 
<span style='color:#800080; '>{</span>
 
pixelVal<span style='color:#808030; '>[</span>i<span style='color:#808030; '>]</span> <span style='color:#808030; '>=</span> <span style='color:#800000; font-weight:bold; '>new</span> <span style='color:#800000; font-weight:bold; '>int</span> <span style='color:#808030; '>[</span>M<span style='color:#808030; '>]</span><span style='color:#800080; '>;</span>
 
<span style='color:#800000; font-weight:bold; '>for</span><span style='color:#808030; '>(</span><span style='color:#800000; font-weight:bold; '>int</span> j <span style='color:#808030; '>=</span> <span style='color:#008c00; '>0</span><span style='color:#800080; '>;</span> j <span style='color:#808030; '>&lt;</span> M<span style='color:#800080; '>;</span> j<span style='color:#808030; '>+</span><span style='color:#808030; '>+</span><span style='color:#808030; '>)</span>
 
<span style='color:#800080; '>{</span>
 
pixelVal<span style='color:#808030; '>[</span>i<span style='color:#808030; '>]</span><span style='color:#808030; '>[</span>j<span style='color:#808030; '>]</span> <span style='color:#808030; '>=</span> oldImage<span style='color:#808030; '>.</span>pixelVal<span style='color:#808030; '>[</span>i<span style='color:#808030; '>]</span><span style='color:#808030; '>[</span>j<span style='color:#808030; '>]</span><span style='color:#800080; '>;</span>
 
dim1<span style='color:#808030; '>[</span>i<span style='color:#808030; '>*</span>N <span style='color:#808030; '>+</span> j<span style='color:#808030; '>]</span> <span style='color:#808030; '>=</span> oldImage<span style='color:#808030; '>.</span>dim1<span style='color:#808030; '>[</span>i<span style='color:#808030; '>*</span>N <span style='color:#808030; '>+</span> j<span style='color:#808030; '>]</span><span style='color:#800080; '>;</span>
 
<span style='color:#800080; '>}</span>
<span style='color:#800080; '>}</span>
</div>
<span style='color:#800080; '>}</span>
<span style='color:#800080; '>}</span>
</pre>The chunk of the processing is wasted on copying the two arrays over from one image to another. If I have time I might look into parallelizing this as well. It would be interesting to see if the speed of the GPU can overcome the overhead of copying to and from the device.
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=== Assignment 3 ===
Rwstanica
1
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