FloatFrameBuffer.java

/*******************************************************************************
 * 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.badlogic.gdx.graphics.glutils;

import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.Application.ApplicationType;
import com.badlogic.gdx.graphics.Pixmap;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.Texture.TextureFilter;
import com.badlogic.gdx.graphics.Texture.TextureWrap;
import com.badlogic.gdx.utils.GdxRuntimeException;

/**
 * This is a {@link FrameBuffer} variant backed by a float texture.
 * 
 */
public class FloatFrameBuffer extends FrameBuffer {

	/**
	 * Creates a new FrameBuffer with a float backing texture, having the given dimensions and potentially a depth
	 * buffer attached.
	 * 
	 * @param width
	 *            the width of the framebuffer in pixels
	 * @param height
	 *            the height of the framebuffer in pixels
	 * @param hasDepth
	 *            whether to attach a depth buffer
	 * @throws GdxRuntimeException
	 *             in case the FrameBuffer could not be created
	 */
	public FloatFrameBuffer(int width, int height, boolean hasDepth) {
		super(null, width, height, hasDepth);
	}

	/**
	 * Override this method in a derived class to set up the backing texture as you like.
	 */
	protected void setupTexture() {
		FloatTextureData data = new FloatTextureData(width, height);
		colorTexture = new Texture(data);
		if (Gdx.app.getType() == ApplicationType.Desktop || Gdx.app.getType() == ApplicationType.Applet)
			colorTexture.setFilter(TextureFilter.Linear, TextureFilter.Linear);
		else
			//no filtering for float textures in OpenGL ES
			colorTexture.setFilter(TextureFilter.Nearest, TextureFilter.Nearest);
		colorTexture.setWrap(TextureWrap.ClampToEdge, TextureWrap.ClampToEdge);
	}
}