DemoInnerGlow01.kt

import org.openrndr.application
import org.openrndr.color.ColorRGBa
import org.openrndr.extra.compositor.compose
import org.openrndr.extra.compositor.draw
import org.openrndr.extra.compositor.layer
import org.openrndr.extra.compositor.post
import org.openrndr.extra.fx.patterns.Checkers
import org.openrndr.extra.jumpfill.fx.InnerGlow

fun main() = application {
    configure {
        width = 720
        height = 720
    }
    program {
        val c = compose {
            layer {
                post(Checkers())
            }
            layer {
                draw {
                    drawer.fill = ColorRGBa.PINK.shade(0.5)
                    drawer.stroke = null
                    drawer.circle(width / 2.0, height / 2.0, width * 0.35)
                }
                post(InnerGlow()) {
                    color = ColorRGBa(-1.0, -1.0, -1.0, 0.25);
                    width = 30.0
                }
            }
        }
        extend {
            c.draw(drawer)
        }
    }
}