Fast method to copy memory with translation - ARGB to BGR

Question

Overview

I have an image buffer that I need to convert to another format. The origin image buffer is four channels, 8 bits per channel, Alpha, Red, Green, and Blue

Answer 1

In combination with one of the fast conversion functions here, given access to Core 2s it might be wise to split the translation into threads, which work on their, say, fourth of the data, as in this psudeocode:

void bulk_bgrFromArgb(byte[] dest, byte[] src, int n)
{
       thread threads[] = {
           create_thread(bgrFromArgb, dest, src, n/4),
           create_thread(bgrFromArgb, dest+n/4, src+n/4, n/4),
           create_thread(bgrFromArgb, dest+n/2, src+n/2, n/4),
           create_thread(bgrFromArgb, dest+3*n/4, src+3*n/4, n/4),
       }
       join_threads(threads);
}