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Diffstat (limited to 'src/java/org/apache/fop/image/analyser/PNGReader.java')
-rw-r--r--src/java/org/apache/fop/image/analyser/PNGReader.java115
1 files changed, 0 insertions, 115 deletions
diff --git a/src/java/org/apache/fop/image/analyser/PNGReader.java b/src/java/org/apache/fop/image/analyser/PNGReader.java
deleted file mode 100644
index ab6c64775..000000000
--- a/src/java/org/apache/fop/image/analyser/PNGReader.java
+++ /dev/null
@@ -1,115 +0,0 @@
-/*
- * 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.
- */
-
-/* $Id$ */
-
-package org.apache.fop.image.analyser;
-
-// Java
-import java.io.InputStream;
-import java.io.IOException;
-
-// FOP
-import org.apache.fop.image.FopImage;
-import org.apache.fop.apps.FOUserAgent;
-
-/**
- * ImageReader object for PNG image type.
- *
- * @author Pankaj Narula
- * @version $Id$
- */
-public class PNGReader implements ImageReader {
-
- private static final int PNG_SIG_LENGTH = 24;
-
- /** {@inheritDoc} */
- public FopImage.ImageInfo verifySignature(String uri, InputStream bis,
- FOUserAgent ua) throws IOException {
- byte[] header = getDefaultHeader(bis);
- boolean supported = ((header[0] == (byte) 0x89)
- && (header[1] == (byte) 0x50)
- && (header[2] == (byte) 0x4e)
- && (header[3] == (byte) 0x47)
- && (header[4] == (byte) 0x0d)
- && (header[5] == (byte) 0x0a)
- && (header[6] == (byte) 0x1a)
- && (header[7] == (byte) 0x0a));
-
- if (supported) {
- FopImage.ImageInfo info = new FopImage.ImageInfo();
- info.dpiHorizontal = ua.getFactory().getSourceResolution();
- info.dpiVertical = info.dpiHorizontal;
-
- getDimension(header, info);
- info.originalURI = uri;
- info.mimeType = getMimeType();
- info.inputStream = bis;
- return info;
- } else {
- return null;
- }
- }
-
- /**
- * Returns the MIME type supported by this implementation.
- *
- * @return The MIME type
- */
- public String getMimeType() {
- return "image/png";
- }
-
- private void getDimension(byte[] header, FopImage.ImageInfo info) {
- // png is always big endian
- int byte1 = header[16] & 0xff;
- int byte2 = header[17] & 0xff;
- int byte3 = header[18] & 0xff;
- int byte4 = header[19] & 0xff;
- long l = (long) ((byte1 << 24)
- | (byte2 << 16)
- | (byte3 << 8)
- | (byte4));
- info.width = (int) l;
-
- byte1 = header[20] & 0xff;
- byte2 = header[21] & 0xff;
- byte3 = header[22] & 0xff;
- byte4 = header[23] & 0xff;
- l = (long) ((byte1 << 24) | (byte2 << 16) | (byte3 << 8) | byte4);
- info.height = (int) l;
- }
-
- private byte[] getDefaultHeader(InputStream imageStream)
- throws IOException {
- byte[] header = new byte[PNG_SIG_LENGTH];
- try {
- imageStream.mark(PNG_SIG_LENGTH + 1);
- imageStream.read(header);
- imageStream.reset();
- } catch (IOException ex) {
- try {
- imageStream.reset();
- } catch (IOException exbis) {
- // throw the original exception, not this one
- }
- throw ex;
- }
- return header;
- }
-
-}