ForgePatch/src/main/java/net/minecraftforge/client/MinecraftForgeClient.java

/**
 * This software is provided under the terms of the Minecraft Forge Public
 * License v1.0.
 */

package net.minecraftforge.client;

import java.util.BitSet;
import net.minecraft.util.EnumWorldBlockLayer;

public class MinecraftForgeClient
{
    public static int getRenderPass()
    {
        return ForgeHooksClient.renderPass;
    }

    public static EnumWorldBlockLayer getRenderLayer()
    {
        return ForgeHooksClient.renderLayer.get();
    }

    private static BitSet stencilBits = new BitSet(8);
    static
    {
        stencilBits.set(0,8);
    }

    /**
     * Reserve a stencil bit for use in rendering
     *
     * Note: you must check the Framebuffer you are working with to
     * determine if stencil bits are enabled on it before use.
     *
     * @return A bit or -1 if no further stencil bits are available
     */
    public static int reserveStencilBit()
    {
        int bit = stencilBits.nextSetBit(0);
        if (bit >= 0)
        {
            stencilBits.clear(bit);
        }
        return bit;
    }

    /**
     * Release the stencil bit for other use
     *
     * @param bit The bit from {@link #reserveStencilBit()}
     */
    public static void releaseStencilBit(int bit)
    {
        if (bit >= 0 && bit < stencilBits.length())
        {
            stencilBits.set(bit);
        }
    }
}