GIFCodec.java
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上传日期:2018-01-04
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- /*
- * Copyright (c) 2001 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:
- *
- * -Redistributions of source code must retain the above copyright notice, this
- * list of conditions and the following disclaimer.
- *
- * -Redistribution in binary form must reproduct 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 AND ITS LICENSORS SHALL NOT BE
- * LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING
- * OR DISTRIBUTING THE 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 SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGES.
- *
- * You acknowledge that Software is not designed,licensed or intended for use in
- * the design, construction, operation or maintenance of any nuclear facility.
- */
- import java.awt.image.RenderedImage;
- import java.io.File;
- import java.io.FileInputStream;
- import java.io.InputStream;
- import java.io.IOException;
- import java.io.OutputStream;
- /**
- */
- public final class GIFCodec extends ImageCodec {
- public GIFCodec() {}
- public String getFormatName() {
- return "gif";
- }
- public Class getEncodeParamClass() {
- return Object.class;
- }
- public Class getDecodeParamClass() {
- return Object.class;
- }
- public boolean canEncodeImage(RenderedImage im,
- ImageEncodeParam param) {
- return false;
- }
- protected ImageEncoder createImageEncoder(OutputStream dst,
- ImageEncodeParam param) {
- /*
- GIFEncodeParam p = null;
- if (param != null) {
- p = (GIFEncodeParam)param;
- }
- return new GIFImageEncoder(dst, p);
- */
- return null;
- }
- protected ImageDecoder createImageDecoder(InputStream src,
- ImageDecodeParam param) {
- return new GIFImageDecoder(src, param);
- }
- protected ImageDecoder createImageDecoder(File src,
- ImageDecodeParam param)
- throws IOException {
- return new GIFImageDecoder(new FileInputStream(src), null);
- }
- protected ImageDecoder createImageDecoder(SeekableStream src,
- ImageDecodeParam param) {
- return new GIFImageDecoder(src, param);
- }
- public int getNumHeaderBytes() {
- return 4;
- }
- public boolean isFormatRecognized(byte[] header) {
- return ((header[0] == 'G') &&
- (header[1] == 'I') &&
- (header[2] == 'F') &&
- (header[3] == '8'));
- }
- }