   modify the rendering on the surface desk of a window of a java program
  Hello!I need to do edge blending (the side of the surface is less luminous) on a program to display it with 2 projectors.This program is in java. I have the source code but I don't know how to make its side less luminous.Somebody has an idea about how to do it? Is there a software already made?I have thought about 2 differents ways to do it, but I don't know if they are possible, so I'll be glad if you tell me.first solution~~~~~~~~~~~~~~I launch a program "A" that gets the surface of the java program, changes the light of its side and displays it in its own window. The projector diplays the window of the program A.second solution~~~~~~~~~~~~~~~I launch a program that modifies the surface desk and I put the window of the java program on the desk. The projector displays the surface desk. I have a big doubt about this because it would mean that the program change the surface desk after it has been written and before it has been displayed.Please tell me what you think about it!!!   