/*
* This file is part of the Illarion project.
*
* Copyright © 2014 - Illarion e.V.
*
* Illarion is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Illarion is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
package org.illarion.engine.backend.gdx;
import com.badlogic.gdx.Files;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;
import com.badlogic.gdx.graphics.glutils.ShaderProgram;
import org.illarion.engine.graphic.Color;
import org.illarion.engine.graphic.effects.HighlightEffect;
import javax.annotation.Nonnull;
/**
* This is the implementation of the highlight effect that is used by libGDX.
*
* @author Martin Karing <nitram@illarion.org>
*/
class GdxHighlightEffect implements HighlightEffect, GdxTextureEffect {
/**
* The pixel shader that is required for this effect.
*/
@Nonnull
private final ShaderProgram shader;
/**
* The color that is applied to highlight the rendered object.
*/
@Nonnull
private final com.badlogic.gdx.graphics.Color highlightColor;
/**
* Create a new instance of the highlight effect.
*
* @param files the file system handler used to load the effect data
*/
GdxHighlightEffect(@Nonnull Files files) {
//noinspection SpellCheckingInspection
shader = new ShaderProgram(files.internal("org/illarion/engine/backend/gdx/shaders/generic.vert"),
files.internal("org/illarion/engine/backend/gdx/shaders/highlight.frag"));
highlightColor = new com.badlogic.gdx.graphics.Color();
}
@Override
public void activateEffect(@Nonnull SpriteBatch batch) {
batch.setShader(shader);
shader.setUniformf("u_colorHighlight", highlightColor);
}
@Override
public void disableEffect(@Nonnull SpriteBatch batch) {
batch.setShader(null);
}
@Override
public void setTopLeftCoordinate(float x, float y) {
}
@Override
public void setBottomRightCoordinate(float x, float y) {
}
@Override
public void setHighlightColor(@Nonnull Color color) {
GdxGraphics.transferColor(color, highlightColor);
}
}