OpenGL Error (GL_INVALID_VALUE) at createFontsTexture

Hi, I am getting this error with LibGDX 1.9.9, imgui v1.67-beta-00

Exception in thread "main" com.badlogic.gdx.utils.GdxRuntimeException: java.lang.Exception: OpenGL Error (GL_INVALID_VALUE) at createFontsTexture
	at com.badlogic.gdx.backends.lwjgl3.Lwjgl3Application.<init>(Lwjgl3Application.java:117)
	at com.x.prototype.desktop.DesktopLauncher.main(DesktopLauncher.kt:17)
Caused by: java.lang.Exception: OpenGL Error (GL_INVALID_VALUE) at createFontsTexture
	at gln.GlnKt.checkError(gln.kt:78)
	at gln.GlnKt.checkError$default(gln.kt:61)
	at imgui.impl.ImplGL3.createFontsTexture(ImplGL3.kt:129)
	at imgui.impl.ImplGL3.createDeviceObjects(ImplGL3.kt:94)
	at imgui.impl.LwjglGlfw.newFrame(LwjglGlfw.kt:107)
	at com.x.prototype.screen.TileEditorScreen.show(TileEditorScreen.kt:23)
	at com.badlogic.gdx.Game.setScreen(Game.java:61)
	at com.x.prototype.App.setCurrentScreen(App.kt:32)

class TileEditorScreen(app: AppContext, val levelName: String, val loadMap: Boolean)
    : BaseScreen(app) {

    private lateinit var context: Context

    override fun show() {
        super.show()
        context = Context()
        LwjglGlfw.init(GlfwWindow.from((Gdx.graphics as Lwjgl3Graphics).window.windowHandle))
        ImGui.styleColorsDark()
    }

    override fun renderScene(delta: Float) {
        LwjglGlfw.newFrame()

        with(ImGui) {
            begin("Demo_0", booleanArrayOf(true), 0)
            text("Hello, world!")
            end()

            showDemoWindow(booleanArrayOf(true))

            render()

            drawData?.run {
                ImplGL3.renderDrawData(this)
            }
        }
    }

    override fun dispose() {
        LwjglGlfw.shutdown()
        context.shutdown()
    }
}

In BaseScreen I have this:

    final override fun render(delta: Float) {
        clearScreen()
        uiStage.act()
        app.soundManager.update()

        renderScene(delta)
        renderHud()
    }

    abstract fun renderScene(delta: Float)

    private fun renderHud() {
        uiStage.draw()
    }

It does not happen when I disable renderHud in render but It happens also when I add after renderScene just empty batch.begin(); batch.end() like this:

abstract class BaseScreen(val app: AppContext) : com.badlogic.gdx.Screen, InputProcessor { //
   ...
   final override fun render(delta: Float) {
        ...
        renderScene(delta)
        batch.begin()
        batch.end()
}

In App I have this:

class App : Game(), AppContext {
    ...
    override var currentScreen: Screen
        get() = screen
        set(value) {
            if (screen != null) {
                screen.dispose()
            }
            setScreen(value)
        }

and I open screen like this:

        loadMap.onClick {
            app.currentScreen = TileEditorScreen(app, mapName.text, true)
        }

[Sylvyrfysh]

Can you create a minimal reproducible error? This means create a single file with the least amount needed to create the error. Otherwise, please link the repository.

[yuraj11]

Yes that’s possible. I have solved It by using only one Spritebatch for entire application. Thanks for your help.