First of all, my english is not good. But I wish you can understand what I would like to know.

I am trying to change background color when image is zoomed out in jit.rota. The color is always black, but I need white. How can I change background color?

I tried to use another white image with jit.qt.movie for background. But this way was not good for performance speed.

I appreciated it if you could tell me how to do this or any good idea if you have.

I am trying to change background color when image is zoomed out in jit.rota. The color is always black, but I need white. How can I change background color?
I tried to use another white image with jit.qt.movie for background. But this way was not good for performance speed.

background-color-of-jit-rota

At this time, there is no way to set the clear color in jit.rota, 

although we could consider adding this to a future release. For now, 

you'll likely want to use jit.charmap to turn all instances of black 

to white, although this might have repercussions on the image. 

Alternately, you could hack up a solution, by running a parallel 

patch, rotating a black square against a white background. Then, with 

jit.op objects, we can add in a white background. See attached patch 

At this time, there is no way to set the clear color in jit.rota,  
although we could consider adding this to a future release. For now,  
you'll likely want to use jit.charmap to turn all instances of black  
to white, although this might have repercussions on the image.  
Alternately, you could hack up a solution, by running a parallel  
patch, rotating a black square against a white background. Then, with  
jit.op objects, we can add in a white background. See attached patch  
below.

another method would be to add a small white border & then use 

another method would be to add a small white border & then use  
boundmode 3:

since @boundmode 1 also clears the alpha channel, i like to use 

jit.alphablend on the output of jit.rota like so:

since @boundmode 1 also clears the alpha channel, i like to use  
jit.alphablend on the output of jit.rota like so:

You could also invert your image colors, then run rota, then invert again.

> I am trying to change background color when image is zoomed out in 

> jit.rota. The color is always black, but I need white. How can I 

Please see the jit.rota-bgcolor.pat example. It demonstrates exactly 

how to accomplish this with a named output matrix.

> I am trying to change background color when image is zoomed out in  
> jit.rota. The color is always black, but I need white. How can I  
> change background color?

Please see the jit.rota-bgcolor.pat example. It demonstrates exactly  
how to accomplish this with a named output matrix.

I had not had any good solution for this.

So I try all your proposal and chose best one for my patch.

I had not had any good solution for this.
So I try all your proposal and chose best one for my patch.

background color of jit.rota