/*
* $RCSfile: DataBlkFloat.java,v $
* $Revision: 1.1 $
* $Date: 2005/02/11 05:02:12 $
* $State: Exp $
*
* Interface: DataBlkFloat
*
* Description: A float implementation of DataBlk
*
*
*
* COPYRIGHT:
*
* This software module was originally developed by Raphal Grosbois and
* Diego Santa Cruz (Swiss Federal Institute of Technology-EPFL); Joel
* Askelf (Ericsson Radio Systems AB); and Bertrand Berthelot, David
* Bouchard, Flix Henry, Gerard Mozelle and Patrice Onno (Canon Research
* Centre France S.A) in the course of development of the JPEG2000
* standard as specified by ISO/IEC 15444 (JPEG 2000 Standard). This
* software module is an implementation of a part of the JPEG 2000
* Standard. Swiss Federal Institute of Technology-EPFL, Ericsson Radio
* Systems AB and Canon Research Centre France S.A (collectively JJ2000
* Partners) agree not to assert against ISO/IEC and users of the JPEG
* 2000 Standard (Users) any of their rights under the copyright, not
* including other intellectual property rights, for this software module
* with respect to the usage by ISO/IEC and Users of this software module
* or modifications thereof for use in hardware or software products
* claiming conformance to the JPEG 2000 Standard. Those intending to use
* this software module in hardware or software products are advised that
* their use may infringe existing patents. The original developers of
* this software module, JJ2000 Partners and ISO/IEC assume no liability
* for use of this software module or modifications thereof. No license
* or right to this software module is granted for non JPEG 2000 Standard
* conforming products. JJ2000 Partners have full right to use this
* software module for his/her own purpose, assign or donate this
* software module to any third party and to inhibit third parties from
* using this software module for non JPEG 2000 Standard conforming
* products. This copyright notice must be included in all copies or
* derivative works of this software module.
*
* Copyright (c) 1999/2000 JJ2000 Partners.
*
*
*
*/
package jj2000.j2k.image;
/**
* This is an implementation of the <tt>DataBlk</tt> interface for
* 32 bit floating point data (float).
*
* <P>The methods in this class are declared final, so that they can
* be inlined by inlining compilers.
*
* @see DataBlk
* */
public class DataBlkFloat extends DataBlk {
/** The array where the data is stored */
public float[] data;
/**
* Creates a DataBlkFloat with 0 dimensions and no data array
* (i.e. data is null).
*
*
*
*/
public DataBlkFloat() {
}
/**
* Creates a DataBlkFloat with the specified dimensions and
* position. The data array is initialized to an array of size
* w*h.
*
* @param ulx The horizontal coordinate of the upper-left corner
* of the block
*
* @param uly The vertical coordinate of the upper-left corner
* of the block
*
* @param w The width of the block (in pixels)
*
* @param h The height of the block (in pixels)
*
*
* */
public DataBlkFloat(int ulx, int uly, int w, int h) {
this.ulx = ulx;
this.uly = uly;
this.w = w;
this.h = h;
offset = 0;
scanw = w;
data = new float[w*h];
}
/**
* Copy constructor.
* Creates a DataBlkFloat which is the copy of the DataBlkFloat
* given as paramter.
*
* @param DataBlkFloat the object to be copied.
*
*
* */
public DataBlkFloat(DataBlkFloat src) {
this.ulx = src.ulx;
this.uly = src.uly;
this.w = src.w;
this.h = src.h;
this.offset = 0;
this.scanw = this.w;
this.data = new float[this.w*this.h];
for ( int i=0 ; i<this.h ; i++ )
System.arraycopy(src.data, i*src.scanw,
this.data, i*this.scanw, this.w);
}
/**
* Returns the identifier of this data type, <tt>TYPE_FLOAT</tt>,
* as defined in <tt>DataBlk</tt>.
*
* @return The type of data stored. Always
* <tt>DataBlk.TYPE_FLOAT</tt>
*
* @see DataBlk#TYPE_FLOAT
*
*
* */
public final int getDataType() {
return TYPE_FLOAT;
}
/**
* Returns the array containing the data, or null if there is no
* data array. The returned array is a float array.
*
* @return The array of data (a float[]) or null if there is no
* data.
*
*
*
*/
public final Object getData() {
return data;
}
/**
* Returns the array containing the data, or null if there is no
* data array.
*
* @return The array of data or null if there is no data.
*
*
* */
public final float[] getDataFloat() {
return data;
}
/**
* Sets the data array to the specified one. The provided array
* must be a float array, otherwise a ClassCastException is
* thrown. The size of the array is not checked for consistency
* with the block's dimensions.
*
* @param arr The data array to use. Must be a float array.
*
*
* */
public final void setData(Object arr) {
data = (float[]) arr;
}
/**
* Sets the data array to the specified one. The size of the array
* is not checked for consistency with the block's dimensions.
*
* @param arr The data array to use.
*
*
* */
public final void setDataFloat(float[] arr) {
data = arr;
}
/**
* Returns a string of informations about the DataBlkInt.
* */
public String toString() {
String str = super.toString();
if(data!=null) {
str += ",data="+data.length+" bytes";
}
return str;
}
}
|