/*
 * Copyright (c) 2005 Sun Microsystems, Inc. All Rights Reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 * 
 * - Redistribution of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * 
 * - Redistribution in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * 
 * Neither the name of Sun Microsystems, Inc. or the names of
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 * 
 * This software is provided "AS IS," without a warranty of any kind. ALL
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
 * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
 * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
 * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
 * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
 * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
 * ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
 * DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
 * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
 * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
 * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 * 
 * You acknowledge that this software is not designed or intended for use
 * in the design, construction, operation or maintenance of any nuclear
 * facility.
 * 
 * Sun gratefully acknowledges that this software was originally authored
 * and developed by Kenneth Bradley Russell and Christopher John Kline.
 */

package com.sun.opengl.utils;

import java.io.*;
import java.net.*;

/** Plug-in interface to TextureIO to support reading OpenGL textures
    from new file formats. For all methods, either internalFormat or
    pixelFormat may be 0 in which case they must be inferred as
    e.g. RGB or RGBA depending on the file contents.
*/

public interface TextureProvider {

  /**
   * Produces a TextureData object from a file, or returns null if the
   * file format was not supported by this TextureProvider. Does not
   * do any OpenGL-related work. The resulting TextureData can be
   * converted into an OpenGL texture in a later step.
   *
   * @param file         the file from which to read the texture data
   *
   * @param internalFormat the OpenGL internal format to be used for
   *                       the texture, or 0 if it should be inferred
   *                       from the file's contents
   *
   * @param pixelFormat    the OpenGL pixel format to be used for
   *                       the texture, or 0 if it should be inferred
   *                       from the file's contents
   *
   * @param mipmap     whether mipmaps should be produced for this
   *                   texture either by autogenerating them or
   *                   reading them from the file. Some file formats
   *                   support multiple mipmaps in a single file in
   *                   which case those mipmaps will be used rather
   *                   than generating them.
   *
   * @param fileSuffix     the file suffix to be used as a hint to the
   *                       provider to more quickly decide whether it
   *                       can handle the file, or null if the
   *                       provider should infer the type from the
   *                       file's contents
   *
   * @throws IOException if an error occurred while reading the file
   */
  public TextureData newTextureData(File file,
                                    int internalFormat,
                                    int pixelFormat,
                                    boolean mipmap,
                                    String fileSuffix) throws IOException;

  /**
   * Produces a TextureData object from a stream, or returns null if
   * the file format was not supported by this TextureProvider. Does
   * not do any OpenGL-related work. The resulting TextureData can be
   * converted into an OpenGL texture in a later step.
   *
   * @param stream       the stream from which to read the texture data
   *
   * @param internalFormat the OpenGL internal format to be used for
   *                       the texture, or 0 if it should be inferred
   *                       from the file's contents
   *
   * @param pixelFormat    the OpenGL pixel format to be used for
   *                       the texture, or 0 if it should be inferred
   *                       from the file's contents
   *
   * @param mipmap     whether mipmaps should be produced for this
   *                   texture either by autogenerating them or
   *                   reading them from the file. Some file formats
   *                   support multiple mipmaps in a single file in
   *                   which case those mipmaps will be used rather
   *                   than generating them.
   *
   * @param fileSuffix     the file suffix to be used as a hint to the
   *                       provider to more quickly decide whether it
   *                       can handle the file, or null if the
   *                       provider should infer the type from the
   *                       file's contents
   *
   * @throws IOException if an error occurred while reading the stream
   */
  public TextureData newTextureData(InputStream stream,
                                    int internalFormat,
                                    int pixelFormat,
                                    boolean mipmap,
                                    String fileSuffix) throws IOException;

  /**
   * Produces a TextureData object from a URL, or returns null if the
   * file format was not supported by this TextureProvider. Does not
   * do any OpenGL-related work. The resulting TextureData can be
   * converted into an OpenGL texture in a later step.
   *
   * @param url          the URL from which to read the texture data
   *
   * @param internalFormat the OpenGL internal format to be used for
   *                       the texture, or 0 if it should be inferred
   *                       from the file's contents
   *
   * @param pixelFormat    the OpenGL pixel format to be used for
   *                       the texture, or 0 if it should be inferred
   *                       from the file's contents
   *
   * @param mipmap     whether mipmaps should be produced for this
   *                   texture either by autogenerating them or
   *                   reading them from the file. Some file formats
   *                   support multiple mipmaps in a single file in
   *                   which case those mipmaps will be used rather
   *                   than generating them.
   *
   * @param fileSuffix     the file suffix to be used as a hint to the
   *                       provider to more quickly decide whether it
   *                       can handle the file, or null if the
   *                       provider should infer the type from the
   *                       file's contents
   *
   * @throws IOException if an error occurred while reading the URL
   */
  public TextureData newTextureData(URL url,
                                    int internalFormat,
                                    int pixelFormat,
                                    boolean mipmap,
                                    String fileSuffix) throws IOException;
}