Rotating Pixels on a Texture2D

Unity Engine
1

Does anyone have any suggestions as well as some pseudo code logic for a fast way to rotate pixels in a Color array?
I’m rendering out a T-shape cubemap to a file, but for the sake of the model UVs, I need it to be cohesive all the way around. Currently, the SetPixels method always renders in the same direction.

Example of the resulting file:

2

Actually I think I found my answer:

http://forum.unity3d.com/threads/23904-Rotate-a-texture-with-an-arbitrary-angle.

that works for the most part but appears to have a rounding problem.

Now I need to flip the image, which is basically this:

    public Texture2D flipTexture(Texture2D tex)
    {
	Texture2D flipImage = new Texture2D(tex.width, tex.height);
	int  x,y;
        for (x = 0; x < tex.width; x++) 
	    { 
            for ( y = 0; y < tex.height; y++) 
		    {
			flipImage.SetPixel(y,x,getPixel(tex,x,y));
		    }
	    }
	flipImage.Apply();
       return flipImage; 
    }