DemoImagePathWatcher01.kt

import org.openrndr.application
import org.openrndr.color.ColorRGBa
import org.openrndr.draw.grayscale
import org.openrndr.draw.tint
import org.openrndr.drawImage
import org.openrndr.extra.propertywatchers.watchingImagePath
import org.openrndr.extra.propertywatchers.watchingProperty

fun main() {
    application {
        program {
            val state = object {
                var path = "demo-data/images/image-001.png"
                val image by watchingImagePath(::path) {
                    drawImage(it.width, it.height) {
                        drawer.drawStyle.colorMatrix = grayscale()
                        drawer.image(it)
                    }
                }
                val redImage by watchingProperty(::image, cleaner = { it.destroy() }) {
                    drawImage(it.width, it.height) {
                        drawer.drawStyle.colorMatrix = tint(ColorRGBa.RED)
                        drawer.image(it)
                    }
                }
            }

            extend {
                drawer.image(state.redImage)
            }
        }
    }
}