vimc: Add color descriptions to test image

[Kaaira Gupta <kgupta@es.iitr.ac.in>]

On Mon, Jun 01, 2020 at 01:36:59PM -0300, Helen Koike wrote:
> 
> 
> On 6/1/20 10:53 AM, Kaaira Gupta wrote:
> > Hi!
> > 
> > Currently there is no method to know if the test image generated by vimc
> > is correct (except for comparing it with a known 'correct' image). So, I
> > wanted to investigate about a possibility to add text to each color bar
> > of the generated pattern. I think currently vivid supports this
> > functionality as an optional control, so can we move it to a common 
> > platform so that both VIVID and VIMC can supoort it?
> > 
> > Thanks,
> > Kaaira
> > 
> 
> If it is useful I don't oppose, but I'm not sure how this is implemented
> in vivid (or if it is in tpg).
> I guess it is easier to judge from an RFC code :)

I am sorry for the confusion. Kieran pointed it out to me that vivid
does not print the values of colors to check if they are right or not.
It prints other useful information. As for vimc we want the order of
test image color to be printed so that it can be checked if the visible
order is correct. 

> 
> Regards,
> Helen