Makelangelo-software

package com.marginallyclever.convenience.helpers;

import com.jogamp.opengl.GL;
import com.jogamp.opengl.GL3;
import com.jogamp.opengl.glu.GLU;

import java.nio.FloatBuffer;
import java.nio.IntBuffer;
import java.util.ArrayList;
import java.util.List;

/**
 * A collection of static methods to help with OpenGL.
 *
 */
public class OpenGLHelper {
	private static final IntBuffer depthFunc = IntBuffer.allocate(1);
	private static final FloatBuffer lineWidth = FloatBuffer.allocate(1);

	private static final List<Integer> errorCodes = new ArrayList<>();
	
	public static int drawAtopEverythingStart(GL3 gl) {
		gl.glGetIntegerv(GL3.GL_DEPTH_FUNC, depthFunc);
		gl.glDepthFunc(GL3.GL_ALWAYS);
		return depthFunc.get();
	}

	public static void checkGLError(GL3 gl3,org.slf4j.Logger logger) {
		int err = gl3.glGetError();
		if(err != GL.GL_NO_ERROR) {
			GLU glu = GLU.createGLU(gl3);
			logger.error("GL error {}: {}", err, glu.gluErrorString(err));
			if(!errorCodes.contains(err)) {
				errorCodes.add(err);
				var error = new Exception("GL error %s: %s".formatted(err, glu.gluErrorString(err)));
				logger.error(error.getMessage(), error);
			}
		}
	}

	public static void drawAtopEverythingEnd(GL3 gl, int previousState) {
		gl.glDepthFunc(previousState);
	}

	public static float setLineWidth(GL3 gl,float newWidth) {
		gl.glGetFloatv(GL3.GL_LINE_WIDTH, lineWidth);
		gl.glLineWidth(newWidth);
		return lineWidth.get(0);
	}

	public static boolean disableTextureStart(GL3 gl) {
		boolean b = gl.glIsEnabled(GL3.GL_TEXTURE_2D);
		gl.glDisable(GL3.GL_TEXTURE_2D);
		return b;
	}
	
	public static void disableTextureEnd(GL3 gl,boolean oldState) {
		if(oldState) gl.glEnable(GL3.GL_TEXTURE_2D);
	}
}