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Programming language: Kotlin
Tags: Graphics    

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README

JOGL2D

Zero-overhead 2D rendering library for JOGL

Build Status license

This library is licensed under Apache License 2.0.

JOGL2D is an open source Kotlin library that provides easy 2D graphics rendering capabilities to JOGL without adding any overhead whatsoever (memory/CPU). JOGL2D is a lightweight, resource friendly, stripped down version of brandonborkholder's glg2d.

How Can I Use JOGL2D?

Simply add JOGL2D to your JOGL application using your favourite dependancy management systems.

Gradle

compile 'org.anglur:joglext:1.0.3'

Maven

<dependency>
  <groupId>org.anglur</groupId>
  <artifactId>joglext</artifactId>
  <version>1.0.3</version>
</dependency>

Once added, it is very easy to implement. Start off by making a GLEventListener

object CharlatanoOverlay : GLEventListener {

    private val WINDOW_WIDTH = 500
    private val WINDOW_HEIGHT = 500
    private val FPS = 60

    val window = GLWindow.create(GLCapabilities(null))

    init {
        GLProfile.initSingleton()
    }

    fun open(width: Int = WINDOW_WIDTH, height: Int = WINDOW_HEIGHT, x: Int = 100, y: Int = 1000) {
        val animator = FPSAnimator(window, FPS, true)

        window.addWindowListener(object : WindowAdapter() {
            override fun windowDestroyNotify(e: WindowEvent) {
                thread {
                    if (animator.isStarted)
                        animator.stop()
                    exitProcess(0)
                }.start()
            }
        })

        window.addGLEventListener(this)
        window.setSize(width, height)
        window.setPosition(x, y)
        window.title = "Hello world"
        window.isVisible = true
        animator.start()
    }

    val g = GLGraphics2D() //Create GL2D wrapper

    override fun display(gLDrawable: GLAutoDrawable) {
        val gl2 = gLDrawable.gl.gL2

        gl2.glClear(GL.GL_COLOR_BUFFER_BIT)

        g.prePaint(gLDrawable.context) //Updated wrapper to latest glContext

        g.color = Color.RED
        g.drawRect(0, 0, 200, 200)
        g.color = Color.YELLOW
        g.drawLine(0, 0, 100, 100)
        g.color = Color.CYAN
        g.drawString("OpenGL 2D Made Easy! :D", 100, 100)
    }

    override fun init(glDrawable: GLAutoDrawable) {
    }

    override fun reshape(gLDrawable: GLAutoDrawable, x: Int, y: Int, width: Int, height: Int) {
        val gl = gLDrawable.gl.gL2
        gl.glViewport(0, 0, width, height)
    }

    override fun dispose(gLDrawable: GLAutoDrawable) {
        g.glDispose()
    }
}

Screenshots

Alt text

Huge credits again to @brandonborkholder for open sourcing his G2D library here: https://github.com/brandonborkholder/glg2d


*Note that all licence references and agreements mentioned in the JOGL2D README section above are relevant to that project's source code only.