Class Image

src/main/java/field/graphics/Image.java:11–51

This is an OpenGL Image class (which is not to be confused with an OpenGL Texture). An OpenGL Image is a very recent addition to OpenGL. Unlike Textures, Images can be writeable in random access ways from shaders. Doesn't work, currently, on any version of OS X

import static org.lwjgl.opengl.GL11.*;
import static org.lwjgl.opengl.GL15.GL_READ_WRITE;
import static org.lwjgl.opengl.GL30.GL_RGBA32F;
import static org.lwjgl.opengl.GL42.glBindImageTexture;

/**
 * This is an OpenGL Image class (which is not to be confused with an OpenGL Texture).
 * <p>
 * An OpenGL Image is a very recent addition to OpenGL. Unlike Textures, Images can be writeable in random access ways from shaders. Doesn't work, currently, on any version of OS X
 */
public class Image implements Scene.Perform, OffersUniform<Integer> {

	public final Texture texture;

	public Image(Texture texture) {
		this.texture = texture;
	}

	@Override
	public boolean perform(int pass) {
		if (pass == -1) return perform();
		return true;
	}

	private boolean perform() {
		texture.perform(-1);

		GraphicsContext.checkError(() -> " bound texture now binding image "+texture.specification.unit+" "+((Texture.State) GraphicsContext
				.get(texture)).name);

		int name = ((Texture.State) GraphicsContext
				.get(texture)).name;
//		System.out.println(" name is :"+name+" / "+texture.specification.unit);
		glBindImageTexture(texture.specification.unit, name, 0, false, 0, GL_READ_WRITE, texture.specification.internalFormat);
		GraphicsContext.checkError(() -> " after binding image ");

		return true;
	}



	@Override
	public Integer getUniform() {
		return texture.getUniform();
	}