GLSL gaussian blur of a rgba value

Newbie & Debugging Questions
#1

Morning
How would you blur a RGBA value?
I found this (https://github.com/mattdesl/lwjgl-basics/wiki/ShaderLesson5) tutorial for blurring texture and I was wondering if it is possible to do this with normal colour values. For example you would render a square:

GL11.glBegin(GL_QUADS);
{
GL11.glVertex2f(0, 0);
GL11.glVertex2f(0, 50);
GL11.glVertex2f(50, 50);
GL11.glVertex2f(50, 0);
}
GL11.glEnd();

And for there you would use a shader program to blur it.

Any idea what this shader program may look like and if so what is the best way I can implement it?

Thanks in advance ;D

#2

like that : https://github.com/mattdesl/lwjgl-basics/wiki/ShaderLesson5

#3

I google’d a bit and found this great solution.