/*
Copyright 2006-2010 Stefano Chizzolini. http://www.pdfclown.org
Contributors:
* Stefano Chizzolini (original code developer, http://www.stefanochizzolini.it)
This file should be part of the source code distribution of "PDF Clown library"
(the Program): see the accompanying README files for more info.
This Program is free software; you can redistribute it and/or modify it under the terms
of the GNU Lesser General Public License as published by the Free Software Foundation;
either version 3 of the License, or (at your option) any later version.
This Program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY,
either expressed or implied; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the License for more details.
You should have received a copy of the GNU Lesser General Public License along with this
Program (see README files); if not, go to the GNU website (http://www.gnu.org/licenses/).
Redistribution and use, with or without modification, are permitted provided that such
redistributions retain the above copyright notice, license and disclaimer, along with
this list of conditions.
*/
package org.pdfclown.documents.contents.entities;
import org.pdfclown.bytes.FileInputStream;
import org.pdfclown.bytes.IInputStream;
/**
Abstract image object [PDF:1.6:4.8].
@author Stefano Chizzolini (http://www.stefanochizzolini.it)
@version 0.1.0
*/
public abstract class Image
extends Entity
{
// <class>
// <static>
// <interface>
// <public>
public static Image get(
String path
)
{
try
{
return get(
new FileInputStream(
new java.io.RandomAccessFile(path,"r")
)
);
}
catch(Exception e)
{throw new RuntimeException(e);}
}
public static Image get(
java.io.File file
)
{return get(file.getPath());}
public static Image get(
IInputStream stream
)
{
try
{
// Get the format identifier!
byte[] formatMarkerBytes = new byte[2];
stream.read(formatMarkerBytes);
// Is JPEG?
/*
NOTE: JPEG files are identified by a SOI (Start Of Image) marker [ISO 10918-1].
*/
if(formatMarkerBytes[0] == (byte)0xFF
&& formatMarkerBytes[1] == (byte)0xD8) // JPEG.
{return new JpegImage(stream);}
else // Unknown.
{return null;}
}
catch(Exception e)
{throw new RuntimeException(e);}
}
// </public>
// </interface>
// </static>
// <dynamic>
// <fields>
private int bitsPerComponent;
private int height;
private int width;
private IInputStream stream;
// </fields>
// <constructors>
protected Image(
IInputStream stream
)
{this.stream = stream;}
// </constructors>
// <interface>
// <public>
/**
Gets the number of bits per color component [PDF:1.6:4.8.2].
*/
public int getBitsPerComponent(
)
{return bitsPerComponent;}
/**
Gets the height of the image in samples [PDF:1.6:4.8.2].
*/
public int getHeight(
)
{return height;}
/**
Gets the width of the image in samples [PDF:1.6:4.8.2].
*/
public int getWidth(
)
{return width;}
// </public>
// <protected>
/**
Gets the underlying stream.
*/
protected IInputStream getStream(
)
{return stream;}
/**
Sets the number of bits per color component [PDF:1.6:4.8.2].
*/
protected void setBitsPerComponent(
int value
)
{bitsPerComponent = value;}
/**
Sets the height of the image in samples [PDF:1.6:4.8.2].
*/
protected void setHeight(
int value
)
{height = value;}
/**
Sets the width of the image in samples [PDF:1.6:4.8.2].
*/
protected void setWidth(
int value
)
{width = value;}
// </protected>
// </interface>
// </dynamic>
// </class>
}