eff1ff4b41
* Fixed a typo in OpenJPEG.J2KLayerInfo (only affected debug display) git-svn-id: http://libopenmetaverse.googlecode.com/svn/libopenmetaverse/trunk@3118 52acb1d6-8a22-11de-b505-999d5b087335
467 lines
17 KiB
C#
467 lines
17 KiB
C#
/*
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* CVS identifier:
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*
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* $Id: ImgWriterPPM.java,v 1.16 2002/07/25 15:10:14 grosbois Exp $
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*
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* Class: ImgWriterRawPPM
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*
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* Description: Image writer for unsigned 8 bit data in
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* PPM file format.
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*
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*
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*
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* COPYRIGHT:
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*
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* This software module was originally developed by Raphaël Grosbois and
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* Diego Santa Cruz (Swiss Federal Institute of Technology-EPFL); Joel
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* Askelöf (Ericsson Radio Systems AB); and Bertrand Berthelot, David
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* Bouchard, Félix Henry, Gerard Mozelle and Patrice Onno (Canon Research
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* Centre France S.A) in the course of development of the JPEG2000
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* standard as specified by ISO/IEC 15444 (JPEG 2000 Standard). This
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* software module is an implementation of a part of the JPEG 2000
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* Standard. Swiss Federal Institute of Technology-EPFL, Ericsson Radio
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* Systems AB and Canon Research Centre France S.A (collectively JJ2000
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* Partners) agree not to assert against ISO/IEC and users of the JPEG
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* 2000 Standard (Users) any of their rights under the copyright, not
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* including other intellectual property rights, for this software module
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* with respect to the usage by ISO/IEC and Users of this software module
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* or modifications thereof for use in hardware or software products
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* claiming conformance to the JPEG 2000 Standard. Those intending to use
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* this software module in hardware or software products are advised that
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* their use may infringe existing patents. The original developers of
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* this software module, JJ2000 Partners and ISO/IEC assume no liability
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* for use of this software module or modifications thereof. No license
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* or right to this software module is granted for non JPEG 2000 Standard
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* conforming products. JJ2000 Partners have full right to use this
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* software module for his/her own purpose, assign or donate this
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* software module to any third party and to inhibit third parties from
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* using this software module for non JPEG 2000 Standard conforming
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* products. This copyright notice must be included in all copies or
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* derivative works of this software module.
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*
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* Copyright (c) 1999/2000 JJ2000 Partners.
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* */
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using System;
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using CSJ2K.j2k.image;
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using CSJ2K.j2k.util;
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using CSJ2K.j2k.io;
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namespace CSJ2K.j2k.image.output
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{
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/// <summary> This class writes 3 components from an image in 8 bit unsigned data to a
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/// binary PPM file.
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///
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/// <P>The size of the image that is written is the size of the source
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/// image. No component subsampling is allowed in any of the components that
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/// are written to the file.
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///
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/// <P>Before writing, all coefficients are inversly level-shifted and then
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/// "saturated" (they are limited * to the nominal dynamic range).<br>
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///
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/// <u>Ex:</u> if the nominal range is 0-255, the following algorithm is
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/// applied:<br>
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///
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/// <tt>if coeff<0, output=0<br>
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///
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/// if coeff>255, output=255<br>
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///
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/// else output=coeff</tt>
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///
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/// The write() methods of an object of this class may not be called
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/// concurrently from different threads.
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///
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/// <P>NOTE: This class is not thread safe, for reasons of internal buffering.
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///
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/// </summary>
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public class ImgWriterPPM:ImgWriter
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{
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/// <summary>Value used to inverse level shift. One for each component </summary>
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private int[] levShift = new int[3];
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/// <summary>Where to write the data </summary>
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//UPGRADE_TODO: Class 'java.io.RandomAccessFile' was converted to 'System.IO.FileStream' which has a different behavior. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1073_javaioRandomAccessFile'"
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private System.IO.FileStream out_Renamed;
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/// <summary>The array of indexes of the components from where to get the data </summary>
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private int[] cps = new int[3];
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/// <summary>The array of the number of fractional bits in the components of the
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/// source data
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/// </summary>
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private int[] fb = new int[3];
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/// <summary>A DataBlk, just used to avoid allocating a new one each time
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/// it is needed
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/// </summary>
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private DataBlkInt db = new DataBlkInt();
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/// <summary>The offset of the raw pixel data in the PPM file </summary>
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private int offset;
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/// <summary>The line buffer. </summary>
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// This makes the class not thrad safe
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// (but it is not the only one making it so)
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private byte[] buf;
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/// <summary> Creates a new writer to the specified File object, to write data from
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/// the specified component.
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///
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/// <p>The three components that will be written as R, G and B must be
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/// specified through the b1, b2 and b3 arguments.</p>
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///
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/// </summary>
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/// <param name="out">The file where to write the data
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///
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/// </param>
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/// <param name="imgSrc">The source from where to get the image data to write.
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///
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/// </param>
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/// <param name="n1">The index of the first component from where to get the data,
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/// that will be written as the red channel.
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///
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/// </param>
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/// <param name="n2">The index of the second component from where to get the data,
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/// that will be written as the green channel.
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///
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/// </param>
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/// <param name="n3">The index of the third component from where to get the data,
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/// that will be written as the green channel.
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///
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/// </param>
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/// <seealso cref="DataBlk">
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///
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/// </seealso>
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public ImgWriterPPM(System.IO.FileInfo out_Renamed, BlkImgDataSrc imgSrc, int n1, int n2, int n3)
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{
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// Check that imgSrc is of the correct type
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// Check that the component index is valid
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if ((n1 < 0) || (n1 >= imgSrc.NumComps) || (n2 < 0) || (n2 >= imgSrc.NumComps) || (n3 < 0) || (n3 >= imgSrc.NumComps) || (imgSrc.getNomRangeBits(n1) > 8) || (imgSrc.getNomRangeBits(n2) > 8) || (imgSrc.getNomRangeBits(n3) > 8))
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{
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throw new System.ArgumentException("Invalid component indexes");
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}
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// Initialize
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w = imgSrc.getCompImgWidth(n1);
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h = imgSrc.getCompImgHeight(n1);
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// Check that all components have same width and height
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if (w != imgSrc.getCompImgWidth(n2) || w != imgSrc.getCompImgWidth(n3) || h != imgSrc.getCompImgHeight(n2) || h != imgSrc.getCompImgHeight(n3))
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{
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throw new System.ArgumentException("All components must have the" + " same dimensions and no" + " subsampling");
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}
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w = imgSrc.ImgWidth;
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h = imgSrc.ImgHeight;
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// Continue initialization
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bool tmpBool;
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if (System.IO.File.Exists(out_Renamed.FullName))
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tmpBool = true;
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else
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tmpBool = System.IO.Directory.Exists(out_Renamed.FullName);
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bool tmpBool2;
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if (System.IO.File.Exists(out_Renamed.FullName))
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{
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System.IO.File.Delete(out_Renamed.FullName);
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tmpBool2 = true;
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}
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else if (System.IO.Directory.Exists(out_Renamed.FullName))
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{
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System.IO.Directory.Delete(out_Renamed.FullName);
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tmpBool2 = true;
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}
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else
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tmpBool2 = false;
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if (tmpBool && !tmpBool2)
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{
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throw new System.IO.IOException("Could not reset file");
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}
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this.out_Renamed = SupportClass.RandomAccessFileSupport.CreateRandomAccessFile(out_Renamed, "rw");
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src = imgSrc;
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cps[0] = n1;
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cps[1] = n2;
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cps[2] = n3;
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fb[0] = imgSrc.getFixedPoint(n1);
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fb[1] = imgSrc.getFixedPoint(n2);
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fb[2] = imgSrc.getFixedPoint(n3);
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levShift[0] = 1 << (imgSrc.getNomRangeBits(n1) - 1);
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levShift[1] = 1 << (imgSrc.getNomRangeBits(n2) - 1);
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levShift[2] = 1 << (imgSrc.getNomRangeBits(n3) - 1);
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writeHeaderInfo();
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}
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/// <summary> Creates a new writer to the specified file, to write data from the
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/// specified component.
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///
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/// <p>The three components that will be written as R, G and B must be
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/// specified through the b1, b2 and b3 arguments.</p>
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///
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/// </summary>
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/// <param name="fname">The name of the file where to write the data
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///
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/// </param>
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/// <param name="imgSrc">The source from where to get the image data to write.
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///
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/// </param>
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/// <param name="n1">The index of the first component from where to get the data,
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/// that will be written as the red channel.
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///
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/// </param>
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/// <param name="n2">The index of the second component from where to get the data,
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/// that will be written as the green channel.
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///
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/// </param>
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/// <param name="n3">The index of the third component from where to get the data,
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/// that will be written as the green channel.
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///
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/// </param>
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/// <seealso cref="DataBlk">
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///
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/// </seealso>
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public ImgWriterPPM(System.String fname, BlkImgDataSrc imgSrc, int n1, int n2, int n3):this(new System.IO.FileInfo(fname), imgSrc, n1, n2, n3)
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{
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}
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/// <summary> Closes the underlying file or netwrok connection to where the data is
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/// written. Any call to other methods of the class become illegal after a
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/// call to this one.
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///
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/// </summary>
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/// <exception cref="IOException">If an I/O error occurs.
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///
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/// </exception>
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public override void close()
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{
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int i;
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// Finish writing the file, writing 0s at the end if the data at end
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// has not been written.
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if (out_Renamed.Length != 3 * w * h + offset)
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{
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// Goto end of file
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out_Renamed.Seek(out_Renamed.Length, System.IO.SeekOrigin.Begin);
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// Fill with 0s n all the components
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for (i = 3 * w * h + offset - (int) out_Renamed.Length; i > 0; i--)
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{
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out_Renamed.WriteByte((System.Byte) 0);
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}
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}
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out_Renamed.Close();
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src = null;
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out_Renamed = null;
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db = null;
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}
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/// <summary> Writes all buffered data to the file or resource.
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///
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/// </summary>
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/// <exception cref="IOException">If an I/O error occurs.
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///
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/// </exception>
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public override void flush()
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{
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// No flush needed here since we are using a RandomAccessFile Get rid
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// of line buffer (is this a good choice?)
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buf = null;
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}
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/// <summary> Writes the data of the specified area to the file, coordinates are
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/// relative to the current tile of the source. Before writing, the
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/// coefficients are limited to the nominal range.
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///
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/// <p>This method may not be called concurrently from different
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/// threads.</p>
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///
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/// <p>If the data returned from the BlkImgDataSrc source is progressive,
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/// then it is requested over and over until it is not progressive
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/// anymore.</p>
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///
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/// </summary>
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/// <param name="ulx">The horizontal coordinate of the upper-left corner of the
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/// area to write, relative to the current tile.
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///
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/// </param>
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/// <param name="uly">The vertical coordinate of the upper-left corner of the area
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/// to write, relative to the current tile.
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///
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/// </param>
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/// <param name="width">The width of the area to write.
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///
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/// </param>
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/// <param name="height">The height of the area to write.
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///
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/// </param>
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/// <exception cref="IOException">If an I/O error occurs.
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///
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/// </exception>
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public override void write(int ulx, int uly, int w, int h)
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{
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int k, j, i, c;
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// In local variables for faster access
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int fracbits;
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// variables used during coeff saturation
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int shift, tmp, maxVal;
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int tOffx, tOffy; // Active tile offset in the X and Y direction
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// Active tiles in all components have same offset since they are at
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// same resolution (PPM does not support anything else)
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//UPGRADE_WARNING: Data types in Visual C# might be different. Verify the accuracy of narrowing conversions. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1042'"
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tOffx = src.getCompULX(cps[0]) - (int) System.Math.Ceiling(src.ImgULX / (double) src.getCompSubsX(cps[0]));
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//UPGRADE_WARNING: Data types in Visual C# might be different. Verify the accuracy of narrowing conversions. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1042'"
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tOffy = src.getCompULY(cps[0]) - (int) System.Math.Ceiling(src.ImgULY / (double) src.getCompSubsY(cps[0]));
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// Check the array size
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if (db.data_array != null && db.data_array.Length < w)
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{
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// A new one will be allocated by getInternCompData()
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db.data_array = null;
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}
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// Check the line buffer
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if (buf == null || buf.Length < 3 * w)
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{
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buf = new byte[3 * w];
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}
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// Write the data to the file
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// Write line by line
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for (i = 0; i < h; i++)
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{
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// Write into buffer first loop over the three components and
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// write for each
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for (c = 0; c < 3; c++)
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{
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maxVal = (1 << src.getNomRangeBits(cps[c])) - 1;
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shift = levShift[c];
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// Initialize db
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db.ulx = ulx;
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db.uly = uly + i;
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db.w = w;
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db.h = 1;
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// Request the data and make sure it is not progressive
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do
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{
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db = (DataBlkInt) src.getInternCompData(db, cps[c]);
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}
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while (db.progressive);
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// Get the fracbits value
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fracbits = fb[c];
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// Write all bytes in the line
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if (fracbits == 0)
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{
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for (k = db.offset + w - 1, j = 3 * w - 1 + c - 2; j >= 0; k--)
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{
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tmp = db.data_array[k] + shift;
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buf[j] = (byte) ((tmp < 0)?0:((tmp > maxVal)?maxVal:tmp));
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j -= 3;
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}
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}
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else
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{
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for (k = db.offset + w - 1, j = 3 * w - 1 + c - 2; j >= 0; k--)
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{
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tmp = (SupportClass.URShift(db.data_array[k], fracbits)) + shift;
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buf[j] = (byte) ((tmp < 0)?0:((tmp > maxVal)?maxVal:tmp));
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j -= 3;
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}
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}
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}
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// Write buffer into file
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out_Renamed.Seek(offset + 3 * (this.w * (uly + tOffy + i) + ulx + tOffx), System.IO.SeekOrigin.Begin);
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out_Renamed.Write(buf, 0, 3 * w);
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}
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}
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/// <summary> Writes the source's current tile to the output. The requests of data
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/// issued to the source BlkImgDataSrc object are done by strips, in order
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/// to reduce memory usage.
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///
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/// <P>If the data returned from the BlkImgDataSrc source is progressive,
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/// then it is requested over and over until it is not progressive any
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/// more.
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///
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/// </summary>
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/// <exception cref="IOException">If an I/O error occurs.
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///
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/// </exception>
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public override void write()
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{
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int i;
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int tIdx = src.TileIdx;
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int tw = src.getTileCompWidth(tIdx, 0); // Tile width
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int th = src.getTileCompHeight(tIdx, 0); // Tile height
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// Write in strips
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for (i = 0; i < th; i += DEF_STRIP_HEIGHT)
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{
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write(0, i, tw, ((th - i) < DEF_STRIP_HEIGHT)?th - i:DEF_STRIP_HEIGHT);
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}
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}
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/// <summary> Writes the header info of the PPM file :
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///
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/// P6<br>
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///
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/// width height<br>
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///
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/// 255<br>
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///
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/// </summary>
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/// <exception cref="IOException">If there is an I/O Error
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///
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/// </exception>
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private void writeHeaderInfo()
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{
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byte[] byteVals;
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int i;
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System.String val;
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// write 'P6' to file
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out_Renamed.Seek(0, System.IO.SeekOrigin.Begin);
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out_Renamed.WriteByte((System.Byte) 80);
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out_Renamed.WriteByte((System.Byte) 54);
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out_Renamed.WriteByte((System.Byte) 10); // new line
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offset = 3;
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// Write width in ASCII
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val = System.Convert.ToString(w);
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byteVals = System.Text.ASCIIEncoding.ASCII.GetBytes(val);
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for (i = 0; i < byteVals.Length; i++)
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{
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out_Renamed.WriteByte((byte) byteVals[i]);
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offset++;
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}
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out_Renamed.WriteByte((System.Byte) 32); // blank
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offset++;
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// Write height in ASCII
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val = System.Convert.ToString(h);
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byteVals = System.Text.ASCIIEncoding.ASCII.GetBytes(val);
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for (i = 0; i < byteVals.Length; i++)
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{
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out_Renamed.WriteByte((byte) byteVals[i]);
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offset++;
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}
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out_Renamed.WriteByte((System.Byte) 10); // newline
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out_Renamed.WriteByte((System.Byte) 50); // '2'
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out_Renamed.WriteByte((System.Byte) 53); // '5'
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out_Renamed.WriteByte((System.Byte) 53); // '5'
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out_Renamed.WriteByte((System.Byte) 10); // newline
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offset += 5;
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}
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/// <summary> Returns a string of information about the object, more than 1 line
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/// long. The information string includes information from the underlying
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/// RandomAccessFile (its toString() method is called in turn).
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///
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/// </summary>
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/// <returns> A string of information about the object.
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///
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/// </returns>
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public override System.String ToString()
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{
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//UPGRADE_TODO: The equivalent in .NET for method 'java.lang.Object.toString' may return a different value. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1043'"
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return "ImgWriterPPM: WxH = " + w + "x" + h + ", Components = " + cps[0] + "," + cps[1] + "," + cps[2] + "\nUnderlying RandomAccessFile:\n" + out_Renamed.ToString();
|
|
}
|
|
}
|
|
} |