bool CImage::WriteTGA(char *fileName, int offset)
{	
	CLogger logger("log.txt");	

	FILE* Output = fopen(fileName, "wb");	
		
	if ( !Output )
	{	
		logger.Message("Error - <WriteTGA>: Cannot write to file %s", fileName);
	}

	fseek(Output, offset, SEEK_SET);
			
	unsigned char header[18] = {0};
	header[2] = NO_RLE;	
	header[12] = width;	
	header[13] = width >> 8;
	header[14] = height;
	header[15] = height >> 8;			
	header[16] = components << 3;
														 		
	fwrite(header, 18, 1, Output);

	unsigned char *newData = new unsigned char[width * height * components];
	memcpy(newData, pixelData, width * height * components);
	
	// RGB -> BGR
	int i;
	for ( i = 0; i < width * height; i++)
	{												 
		unsigned char temp = newData;
		newData = pixelData;
		newData = temp;
	}

	fwrite(newData, width * height * components, <span class="cpp-number">1</span>, Output);
		
	fclose(Output);
		
	<span class="cpp-keyword">delete</span>[] newData;
	newData = NULL;

	<span class="cpp-keyword">return</span> <span class="cpp-keyword">true</span>;
}

<span class="cpp-keyword">void</span> CImage::SetPixel(<span class="cpp-keyword">int</span> i, <span class="cpp-keyword">int</span> j, <span class="cpp-keyword">unsigned</span> <span class="cpp-keyword">char</span> r, <span class="cpp-keyword">unsigned</span> <span class="cpp-keyword">char</span> g, <span class="cpp-keyword">unsigned</span> <span class="cpp-keyword">char</span> b, <span class="cpp-keyword">unsigned</span> <span class="cpp-keyword">char</span> a)
{	
	pixelData[i*width*components + j*components + <span class="cpp-number">0</span>] = r;	
	pixelData[i*width*components + j*components + <span class="cpp-number">1</span>] = g;
	pixelData[i*width*components + j*components + <span class="cpp-number">2</span>] = b;
	<span class="cpp-keyword">if</span> ( components == <span class="cpp-number">4</span> )
		pixelData[i*width*components + j*components + <span class="cpp-number">3</span>] = a;
}

tColor4ub CImage::GetPixel(<span class="cpp-keyword">int</span> i, <span class="cpp-keyword">int</span> j)
{	
	tColor4ub color;
	color.r = pixelData[i*width*components + j*components + <span class="cpp-number">0</span>];
	color.g = pixelData[i*width*components + j*components + <span class="cpp-number">1</span>];
	color.b = pixelData[i*width*components + j*components + <span class="cpp-number">2</span>];
	<span class="cpp-keyword">if</span> ( components == <span class="cpp-number">4</span> )
		color.a = pixelData[i*width*components + j*components + <span class="cpp-number">3</span>];
	
	<span class="cpp-keyword">return</span> color;
}

<span class="cpp-keyword">void</span> CImage::CreateEmpty(<span class="cpp-keyword">int</span> width, <span class="cpp-keyword">int</span> height, <span class="cpp-keyword">int</span> components, <span class="cpp-keyword">unsigned</span> <span class="cpp-keyword">char</span> *pixelData)
{
	<span class="cpp-keyword">this</span>-&gt;width = width;
	<span class="cpp-keyword">this</span>-&gt;height = height;
	<span class="cpp-keyword">this</span>-&gt;components = components;
		
	<span class="cpp-keyword">this</span>-&gt;pixelData = <span class="cpp-keyword">new</span> <span class="cpp-keyword">unsigned</span> <span class="cpp-keyword">char</span>[width * height * components];
	memset(<span class="cpp-keyword">this</span>-&gt;pixelData, <span class="cpp-number">0</span>, width * height * components);
	<span class="cpp-keyword">if</span> (pixelData)
		memcpy(<span class="cpp-keyword">this</span>-&gt;pixelData, pixelData, width * height * components);
}

</pre></div><!–ENDSCRIPT–>

Okay I'm trying to create now, using the functions above an image that will have the top row all white. Instead of that I get an image that has the bottom wor all whitr, why? here is the code that implements this
<!–STARTSCRIPT–><!–source lang="cpp"–><div class="source"><pre>
CImage img;
img.CreateEmpty(<span class="cpp-number">64</span>, <span class="cpp-number">64</span>, <span class="cpp-number">3</span>, NULL);
<span class="cpp-keyword">int</span> collon;
<span class="cpp-keyword">for</span> ( collon = <span class="cpp-number">0</span>; collon &lt; <span class="cpp-number">64</span>; ++collon )
	img.SetPixel( <span class="cpp-number">0</span>, collon, <span class="cpp-number">255</span>, <span class="cpp-number">255</span>, <span class="cpp-number">255</span>, <span class="cpp-number">255</span>);
img.WriteTGA(<span class="cpp-literal">"test.tga"</span>, <span class="cpp-number">0</span>);
img.Free();

</pre></div><!–ENDSCRIPT–>

and here is the output:
<a href="http://imageshack.us"><img src="http://img254.imageshack.us/img254/6845/testzg5.png" border="0" alt="Image Hosted by ImageShack.us" /></a>

(The last line is white :) )