com.ixeption.libgdx.transitions.impl.ColorFadeTransition.java Source code

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Here is the source code for com.ixeption.libgdx.transitions.impl.ColorFadeTransition.java

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/*******************************************************************************
 * Copyright 2011 See AUTHORS file.
 * 
 * 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 com.ixeption.libgdx.transitions.impl;

import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.graphics.Color;
import com.badlogic.gdx.graphics.GL20;
import com.badlogic.gdx.graphics.Pixmap;
import com.badlogic.gdx.graphics.Pixmap.Format;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.g2d.Batch;
import com.badlogic.gdx.math.Interpolation;
import com.ixeption.libgdx.transitions.ScreenTransition;

/** A color fading transition
 * @author iXeption */
public class ColorFadeTransition implements ScreenTransition {

    private final Color color;
    private final Interpolation interpolation;
    private final Texture texture;

    /** @param color the {@link Color} to fade to
     * @param interpolation the {@link Interpolation} method */
    public ColorFadeTransition(Color color, Interpolation interpolation) {
        this.color = new Color(Color.WHITE);
        this.interpolation = interpolation;

        texture = new Texture(1, 1, Format.RGBA8888);
        Pixmap pixmap = new Pixmap(1, 1, Format.RGBA8888);
        pixmap.setColor(color);
        pixmap.fillRectangle(0, 0, 1, 1);
        texture.draw(pixmap, 0, 0);
    }

    @Override
    public void render(Batch batch, Texture currentScreenTexture, Texture nextScreenTexture, float percent) {
        float width = currentScreenTexture.getWidth();
        float height = currentScreenTexture.getHeight();
        float x = 0;
        float y = 0;

        if (interpolation != null)
            percent = interpolation.apply(percent);

        batch.begin();

        float fade = percent * 2;

        if (fade > 1.0f) {
            fade = 1.0f - (percent * 2 - 1.0f);
            color.a = 1.0f - fade;
            batch.setColor(color);

            batch.draw(nextScreenTexture, 0, 0, width / 2, height / 2, nextScreenTexture.getWidth(),
                    nextScreenTexture.getHeight(), 1, 1, 0, 0, 0, nextScreenTexture.getWidth(),
                    nextScreenTexture.getHeight(), false, true);

        } else {

            color.a = 1.0f - fade;
            batch.setColor(color);

            batch.draw(currentScreenTexture, 0, 0, width / 2, height / 2, width, height, 1, 1, 0, 0, 0, (int) width,
                    (int) height, false, true);

        }

        color.a = fade;

        batch.setColor(color);
        batch.draw(texture, 0, 0, width, height);
        batch.end();
        batch.setColor(Color.WHITE);

    }

}