package com.mojang.blaze3d.pipeline;

import com.mojang.blaze3d.platform.BlendFactor;
import com.mojang.blaze3d.platform.BlendOp;

public record BlendFunction(BlendEquation color, BlendEquation alpha) {
	public static final BlendFunction LIGHTNING = new BlendFunction(BlendFactor.SRC_ALPHA, BlendFactor.ONE);
	public static final BlendFunction GLINT = new BlendFunction(BlendFactor.SRC_COLOR, BlendFactor.ONE, BlendFactor.ZERO, BlendFactor.ONE);
	public static final BlendFunction OVERLAY = new BlendFunction(BlendFactor.SRC_ALPHA, BlendFactor.ONE, BlendFactor.ONE, BlendFactor.ZERO);
	public static final BlendFunction TRANSLUCENT = new BlendFunction(
		BlendFactor.SRC_ALPHA, BlendFactor.ONE_MINUS_SRC_ALPHA, BlendFactor.ONE, BlendFactor.ONE_MINUS_SRC_ALPHA
	);
	public static final BlendFunction TRANSLUCENT_PREMULTIPLIED_ALPHA = new BlendFunction(
		BlendFactor.ONE, BlendFactor.ONE_MINUS_SRC_ALPHA, BlendFactor.ONE, BlendFactor.ONE_MINUS_SRC_ALPHA
	);
	public static final BlendFunction ADDITIVE = new BlendFunction(BlendFactor.ONE, BlendFactor.ONE);
	public static final BlendFunction ENTITY_OUTLINE_BLIT = new BlendFunction(
		BlendFactor.SRC_ALPHA, BlendFactor.ONE_MINUS_SRC_ALPHA, BlendFactor.ZERO, BlendFactor.ONE
	);
	public static final BlendFunction INVERT = new BlendFunction(
		BlendFactor.ONE_MINUS_DST_COLOR, BlendFactor.ONE_MINUS_SRC_COLOR, BlendFactor.ONE, BlendFactor.ZERO
	);

	public BlendFunction(
		final BlendFactor srcColorFactor,
		final BlendFactor dstColorFactor,
		final BlendOp colorOp,
		final BlendFactor srcAlphaFactor,
		final BlendFactor dstAlphaFactor,
		final BlendOp alphaOp
	) {
		this(new BlendEquation(srcColorFactor, dstColorFactor, colorOp), new BlendEquation(srcAlphaFactor, dstAlphaFactor, alphaOp));
	}

	public BlendFunction(final BlendFactor srcColorFactor, final BlendFactor dstColorFactor, final BlendFactor srcAlphaFactor, final BlendFactor dstAlphaFactor) {
		this(srcColorFactor, dstColorFactor, BlendOp.ADD, srcAlphaFactor, dstAlphaFactor, BlendOp.ADD);
	}

	public BlendFunction(final BlendEquation equation) {
		this(equation, equation);
	}

	public BlendFunction(final BlendFactor srcFactor, final BlendFactor dstFactor, final BlendOp op) {
		this(new BlendEquation(srcFactor, dstFactor, op));
	}

	public BlendFunction(final BlendFactor srcFactor, final BlendFactor dstFactor) {
		this(new BlendEquation(srcFactor, dstFactor, BlendOp.ADD));
	}
}