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The main purpose of this libraryis to modernize and maintain the slick2D library.
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package com.github.mathiewz.slick.opengl;

import java.io.IOException;
import java.io.InputStream;

import org.lwjgl.opengl.GL11;

/**
 * A utility class to wrap the Slick internal texture loader and present a
 * rational interface.
 *
 * @author kevin
 */
public class TextureLoader {
    /**
     * Load a texture with a given format from the supplied input stream
     *
     * @param format
     *            The format of the texture to be loaded (something like "PNG" or "TGA")
     * @param in
     *            The input stream from which the image data will be read
     * @return The newly created texture
     * @throws IOException
     *             Indicates a failure to read the image data
     */
    public static Texture getTexture(String format, InputStream in) throws IOException {
        return getTexture(format, in, false, GL11.GL_LINEAR);
    }

    /**
     * Load a texture with a given format from the supplied input stream
     *
     * @param format
     *            The format of the texture to be loaded (something like "PNG" or "TGA")
     * @param in
     *            The input stream from which the image data will be read
     * @param flipped
     *            True if the image should be flipped vertically on loading
     * @return The newly created texture
     * @throws IOException
     *             Indicates a failure to read the image data
     */
    public static Texture getTexture(String format, InputStream in, boolean flipped) throws IOException {
        return getTexture(format, in, flipped, GL11.GL_LINEAR);
    }

    /**
     * Load a texture with a given format from the supplied input stream
     *
     * @param format
     *            The format of the texture to be loaded (something like "PNG" or "TGA")
     * @param in
     *            The input stream from which the image data will be read
     * @param filter
     *            The GL texture filter to use for scaling up and down
     * @return The newly created texture
     * @throws IOException
     *             Indicates a failure to read the image data
     */
    public static Texture getTexture(String format, InputStream in, int filter) throws IOException {
        return getTexture(format, in, false, filter);
    }

    /**
     * Load a texture with a given format from the supplied input stream
     *
     * @param format
     *            The format of the texture to be loaded (something like "PNG" or "TGA")
     * @param in
     *            The input stream from which the image data will be read
     * @param flipped
     *            True if the image should be flipped vertically on loading
     * @param filter
     *            The GL texture filter to use for scaling up and down
     * @return The newly created texture
     * @throws IOException
     *             Indicates a failure to read the image data
     */
    public static Texture getTexture(String format, InputStream in, boolean flipped, int filter) throws IOException {
        return InternalTextureLoader.get().getTexture(in, in.toString() + "." + format, flipped, filter);
    }
}