Image reader for TIFF images

from Michael Lee
PR:
Obtained from:
Submitted by:
Reviewed by:

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@193904 13f79535-47bb-0310-9956-ffa450edef68

diff --git a/src/org/apache/fop/image/analyser/TIFFReader.java b/src/org/apache/fop/image/analyser/TIFFReader.java
new file mode 100644 (file)
index 0000000..be95ad3
--- /dev/null
+++ b/src/org/apache/fop/image/analyser/TIFFReader.java
@@ -0,0 +1,138 @@
+/*
+ ============================================================================
+                                                                        The Apache Software License, Version 1.1
+ ============================================================================
+               Copyright (C) 1999 The Apache Software Foundation. All rights reserved.
+ Redistribution and use in source and binary forms, with or without modifica-
+ tion, are permitted provided that the following conditions are met:
+ 1. Redistributions of  source code must  retain the above copyright  notice,
+               this list of conditions and the following disclaimer.
+ 2. Redistributions 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.
+ 3. The end-user documentation included with the redistribution, if any, must
+               include  the following  acknowledgment:  "This product includes  software
+               developed  by the  Apache Software Foundation  (http://www.apache.org/)."
+               Alternately, this  acknowledgment may  appear in the software itself,  if
+               and wherever such third-party acknowledgments normally appear.
+ 4. The names "Fop" and  "Apache Software Foundation"  must not be used to
+               endorse  or promote  products derived  from this  software without  prior
+               written permission. For written permission, please contact
+               apache@apache.org.
+ 5. Products  derived from this software may not  be called "Apache", nor may
+               "Apache" appear  in their name,  without prior written permission  of the
+               Apache Software Foundation.
+ THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
+ INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ FITNESS  FOR A PARTICULAR  PURPOSE ARE  DISCLAIMED.  IN NO  EVENT SHALL  THE
+ APACHE SOFTWARE  FOUNDATION  OR ITS CONTRIBUTORS  BE LIABLE FOR  ANY DIRECT,
+ INDIRECT, INCIDENTAL, SPECIAL,  EXEMPLARY, OR CONSEQUENTIAL  DAMAGES (INCLU-
+ DING, BUT NOT LIMITED TO, PROCUREMENT  OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ OF USE, DATA, OR  PROFITS; OR BUSINESS  INTERRUPTION)  HOWEVER CAUSED AND ON
+ ANY  THEORY OF LIABILITY,  WHETHER  IN CONTRACT,  STRICT LIABILITY,  OR TORT
+ (INCLUDING  NEGLIGENCE OR  OTHERWISE) ARISING IN  ANY WAY OUT OF THE  USE OF
+ THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ This software  consists of voluntary contributions made  by many individuals
+ on  behalf of the Apache Software  Foundation and was  originally created by
+ James Tauber <jtauber@jtauber.com>. For more  information on the Apache
+ Software Foundation, please see <http://www.apache.org/>.
+ */
+
+package org.apache.fop.image.analyser;
+
+// Java
+import java.io.BufferedInputStream;
+import java.io.IOException;
+
+/**
+ * ImageReader object for TIFF image type.
+ * @author Pankaj Narula, Michael Lee
+ * @version 1.0
+ */
+public class TIFFReader extends AbstractImageReader
+{
+       static protected final int TIFF_SIG_LENGTH = 8;
+       protected byte[] header;
+
+       public boolean verifySignature( BufferedInputStream fis ) throws IOException
+       {
+               this.imageStream = fis;
+               this.setDefaultHeader();
+               boolean supported = false;
+
+               if( header[0] == (byte) 0x49 && header[1] == (byte) 0x49 )              // first 2 bytes = II (little endian encoding)
+               {
+                       // look for '42' in byte 3 and '0' in byte 4
+                       if( header[2] == 42 && header[3] == 0 )
+                               supported = true;
+               }
+
+               if( header[0] == (byte) 0x4D && header[1] == (byte) 0x4D )              // first 2 bytes == MM (big endian encoding)
+               {
+                       // look for '42' in byte 4 and '0' in byte 3
+                       if( header[2] == 0 && header[3] == 42 )
+                               supported = true;
+               }
+
+               if ( supported )
+               {
+                       setDimension();
+                       return true;
+               }
+               else
+                       return false;
+       }
+
+       public String getMimeType()
+       {
+               return "image/tiff";
+       }
+
+       protected void setDimension()
+       {
+               // currently not setting the width and height
+               // these are set again by the Jimi image reader.
+               // I suppose I'll do it one day to be complete.  Or
+               // someone else will.
+               // Note: bytes 4,5,6,7 contain the byte offset in the stream of the first IFD block
+               /*
+               //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 );
+               this.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 );
+               this.height = ( int ) ( l );
+               */
+       }
+
+       protected void setDefaultHeader() throws IOException
+       {
+               this.header = new byte[ TIFF_SIG_LENGTH ];
+               try
+               {
+                       this.imageStream.mark( TIFF_SIG_LENGTH + 1 );
+                       this.imageStream.read( header );
+                       this.imageStream.reset();
+               }
+               catch ( IOException ex )
+               {
+                       try
+                       {
+                               this.imageStream.reset();
+                       }
+                       catch ( IOException exbis ) {}
+                       throw ex;
+               }
+       }
+}
+