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- /* ====================================================================
- Licensed to the Apache Software Foundation (ASF) under one or more
- contributor license agreements. See the NOTICE file distributed with
- this work for additional information regarding copyright ownership.
- The ASF licenses this file to You 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 org.apache.poi.hslf.blip;
-
- import org.apache.poi.util.PngUtils;
- import org.apache.poi.hslf.model.Picture;
- import org.apache.poi.hslf.exceptions.HSLFException;
-
- import javax.imageio.ImageIO;
- import java.awt.image.BufferedImage;
- import java.io.ByteArrayInputStream;
- import java.io.IOException;
-
- /**
- * Represents a PNG picture data in a PPT file
- *
- * @author Yegor Kozlov
- */
- public final class PNG extends Bitmap {
-
- /**
- * @return PNG data
- */
- public byte[] getData() {
- byte[] data = super.getData();
-
- //PNG created on MAC may have a 16-byte prefix which prevents successful reading.
- //Just cut it off!.
- if (PngUtils.matchesPngHeader(data, 16)) {
- byte[] png = new byte[data.length-16];
- System.arraycopy(data, 16, png, 0, png.length);
- data = png;
- }
-
- return data;
- }
-
- /**
- * @return type of this picture
- * @see org.apache.poi.hslf.model.Picture#PNG
- */
- public int getType(){
- return Picture.PNG;
- }
-
- /**
- * PNG signature is <code>0x6E00</code>
- *
- * @return PNG signature (<code>0x6E00</code>)
- */
- public int getSignature(){
- return 0x6E00;
- }
- }
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