/*
 * Copyright 2016 MovingBlocks
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.terasology.rendering.assets.shader;

import java.util.Collection;

public enum ShaderProgramFeature {
    FEATURE_REFRACTIVE_PASS(0b00000001),
    FEATURE_ALPHA_REJECT(0b00000010),
    FEATURE_LIGHT_POINT(0b00000100),
    FEATURE_LIGHT_DIRECTIONAL(0b00001000),
    FEATURE_USE_MATRIX_STACK(0b00100000),
    FEATURE_USE_FORWARD_LIGHTING(0b01000000);

    private int value;

    ShaderProgramFeature(int value) {
        this.value = value;
    }

    public int getValue() {
        return value;
    }

    public static int getBitset(Collection<ShaderProgramFeature> features) {
        int result = 0;
        for (ShaderProgramFeature feature : features) {
            result |= feature.getValue();
        }
        return result;
    }
}