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/*
* $RCSfile: ImgDataAdapter.java,v $
* $Revision: 1.1 $
* $Date: 2005/02/11 05:02:12 $
* $State: Exp $
*
* Class: ImgDataAdapter
*
* Description: A default implementation of the ImgData
* interface that has an ImgData source and just
* returns the values of the source.
*
*
*
* COPYRIGHT:
*
* This software module was originally developed by Raphaël Grosbois and
* Diego Santa Cruz (Swiss Federal Institute of Technology-EPFL); Joel
* Askelöf (Ericsson Radio Systems AB); and Bertrand Berthelot, David
* Bouchard, Félix 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;
import java.awt.Point;
/**
* This class provides a default implementation of the methods in the
* 'ImgData' interface. The default implementation is just to return the value
* of the source, where the source is another 'ImgData' object.
*
* <p>This abstract class can be used to facilitate the development of other
* classes that implement 'ImgData'. For example a YCbCr color transform can
* inherit from this class and all the trivial methods do not have to be
* re-implemented.</p>
*
* <p>If the default implementation of a method provided in this class does
* not suit a particular implementation of the 'ImgData' interface, the method
* can be overridden to implement the proper behavior.</p>
*
* @see ImgData
* */
public abstract class ImgDataAdapter implements ImgData {
/** Index of the current tile */
protected int tIdx = 0;
/** The ImgData source */
protected ImgData imgdatasrc;
/**
* Instantiates the ImgDataAdapter object specifying the ImgData source.
*
* @param src From where to obtain all the ImgData values.
* */
protected ImgDataAdapter(ImgData src) {
imgdatasrc = src;
}
/**
* Returns the overall width of the current tile in pixels. This is the
* tile's width without accounting for any component subsampling. This is
* also referred as the reference grid width in the current tile.
*
* <p>This default implementation returns the value of the source.</p>
*
* @return The total current tile's width in pixels.
* */
public int getTileWidth() {
return imgdatasrc.getTileWidth();
}
/**
* Returns the overall height of the current tile in pixels. This is the
* tile's height without accounting for any component subsampling. This is
* also referred as the reference grid height in the current tile.
*
* <p>This default implementation returns the value of the source.</p>
*
* @return The total current tile's height in pixels.
* */
public int getTileHeight() {
return imgdatasrc.getTileHeight();
}
/** Returns the nominal tiles width */
public int getNomTileWidth() {
return imgdatasrc.getNomTileWidth();
}
/** Returns the nominal tiles height */
public int getNomTileHeight() {
return imgdatasrc.getNomTileHeight();
}
/**
* Returns the overall width of the image in pixels. This is the image's
* width without accounting for any component subsampling or tiling.
*
* <p>This default implementation returns the value of the source.</p>
*
* @return The total image's width in pixels.
* */
public int getImgWidth() {
return imgdatasrc.getImgWidth();
}
/**
* Returns the overall height of the image in pixels. This is the image's
* height without accounting for any component subsampling or tiling.
*
* <p>This default implementation returns the value of the source.</p>
*
* @return The total image's height in pixels.
* */
public int getImgHeight() {
return imgdatasrc.getImgHeight();
}
/**
* Returns the number of components in the image.
*
* <p>This default implementation returns the value of the source.</p>
*
* @return The number of components in the image.
* */
public int getNumComps() {
return imgdatasrc.getNumComps();
}
/**
* Returns the component subsampling factor in the horizontal direction,
* for the specified component. This is, approximately, the ratio of
* dimensions between the reference grid and the component itself, see the
* 'ImgData' interface desription for details.
*
* <p>This default implementation returns the value of the source.</p>
*
* @param c The index of the component (between 0 and N-1)
*
* @return The horizontal subsampling factor of component 'c'
*
* @see ImgData
* */
public int getCompSubsX(int c) {
return imgdatasrc.getCompSubsX(c);
}
/**
* Returns the component subsampling factor in the vertical direction, for
* the specified component. This is, approximately, the ratio of
* dimensions between the reference grid and the component itself, see the
* 'ImgData' interface desription for details.
*
* <p>This default implementation returns the value of the source.</p>
*
* @param c The index of the component (between 0 and N-1)
*
* @return The vertical subsampling factor of component 'c'
*
* @see ImgData
* */
public int getCompSubsY(int c) {
return imgdatasrc.getCompSubsY(c);
}
/**
* Returns the width in pixels of the specified tile-component
* tile.
*
* <p>This default implementation returns the value of the source.</p>
*
* @param t Tile index
*
* @param c The index of the component, from 0 to N-1.
*
* @return The width in pixels of component <tt>c</tt> in tile<tt>t</tt>.
* */
public int getTileCompWidth(int t,int c) {
return imgdatasrc.getTileCompWidth(t,c);
}
/**
* Returns the height in pixels of the specified tile-component.
*
* <p>This default implementation returns the value of the source.</p>
*
* @param t The tile index.
*
* @param c The index of the component, from 0 to N-1.
*
* @return The height in pixels of component <tt>c</tt> in tile
* <tt>t</tt>.
* */
public int getTileCompHeight(int t,int c) {
return imgdatasrc.getTileCompHeight(t,c);
}
/**
* Returns the width in pixels of the specified component in the overall
* image.
*
* <p>This default implementation returns the value of the source.</p>
*
* @param c The index of the component, from 0 to N-1.
*
* @return The width in pixels of component <tt>c</tt> in the overall
* image.
* */
public int getCompImgWidth(int c) {
return imgdatasrc.getCompImgWidth(c);
}
/**
* Returns the height in pixels of the specified component in the overall
* image.
*
* <p>This default implementation returns the value of the source.</p>
*
* @param c The index of the component, from 0 to N-1.
*
* @return The height in pixels of component <tt>c</tt> in the overall
* image.
* */
public int getCompImgHeight(int c) {
return imgdatasrc.getCompImgHeight(c);
}
/**
* Returns the number of bits, referred to as the "range bits",
* corresponding to the nominal range of the image data in the specified
* component. If this number is <i>n</b> then for unsigned data the
* nominal range is between 0 and 2^b-1, and for signed data it is between
* -2^(b-1) and 2^(b-1)-1. In the case of transformed data which is not in
* the image domain (e.g., wavelet coefficients), this method returns the
* "range bits" of the image data that generated the coefficients.
*
* <p>This default implementation returns the value of the source.</p>
*
* @param c The index of the component.
*
* @return The number of bits corresponding to the nominal range of the
* image data (in the image domain).
* */
public int getNomRangeBits(int c) {
return imgdatasrc.getNomRangeBits(c);
}
/**
* Changes the current tile, given the new indexes. An
* IllegalArgumentException is thrown if the indexes do not correspond to
* a valid tile.
*
* <p>This default implementation just changes the tile in the source.</p>
*
* @param x The horizontal index of the tile.
*
* @param y The vertical index of the new tile.
* */
public void setTile(int x, int y) {
imgdatasrc.setTile(x,y);
tIdx = getTileIdx();
}
/**
* Advances to the next tile, in standard scan-line order (by rows then
* columns). An NoNextElementException is thrown if the current tile is
* the last one (i.e. there is no next tile).
*
* <p>This default implementation just advances to the next tile in the
* source.</p>
* */
public void nextTile() {
imgdatasrc.nextTile();
tIdx = getTileIdx();
}
/**
* Returns the indexes of the current tile. These are the horizontal and
* vertical indexes of the current tile.
*
* <p>This default implementation returns the value of the source.</p>
*
* @param co If not null this object is used to return the information. If
* null a new one is created and returned.
*
* @return The current tile's indexes (vertical and horizontal indexes).
* */
public Point getTile(Point co) {
return imgdatasrc.getTile(co);
}
/**
* Returns the index of the current tile, relative to a standard scan-line
* order.
*
* <p>This default implementation returns the value of the source.</p>
*
* @return The current tile's index (starts at 0).
* */
public int getTileIdx() {
return imgdatasrc.getTileIdx();
}
/**
* Returns the horizontal coordinate of the upper-left corner of the
* specified component in the current tile.
*
* <p>This default implementation returns the value of the source.</p>
*
* @param c The component index.
* */
public int getCompULX(int c) {
return imgdatasrc.getCompULX(c);
}
/**
* Returns the vertical coordinate of the upper-left corner of the
* specified component in the current tile.
*
* <p>This default implementation returns the value of the source.</p>
*
* @param c The component index.
* */
public int getCompULY(int c) {
return imgdatasrc.getCompULY(c);
}
/** Returns the horizontal tile partition offset in the reference grid */
public int getTilePartULX() {
return imgdatasrc.getTilePartULX();
}
/** Returns the vertical tile offset in the reference grid */
public int getTilePartULY() {
return imgdatasrc.getTilePartULY();
}
/**
* Returns the horizontal coordinate of the image origin, the top-left
* corner, in the canvas system, on the reference grid.
*
* <p>This default implementation returns the value of the source.</p>
*
* @return The horizontal coordinate of the image origin in the canvas
* system, on the reference grid.
* */
public int getImgULX() {
return imgdatasrc.getImgULX();
}
/**
* Returns the vertical coordinate of the image origin, the top-left
* corner, in the canvas system, on the reference grid.
*
* <p>This default implementation returns the value of the source.</p>
*
* @return The vertical coordinate of the image origin in the canvas
* system, on the reference grid.
* */
public int getImgULY() {
return imgdatasrc.getImgULY();
}
/**
* Returns the number of tiles in the horizontal and vertical directions.
*
* <p>This default implementation returns the value of the source.</p>
*
* @param co If not null this object is used to return the information. If
* null a new one is created and returned.
*
* @return The number of tiles in the horizontal (Point.x) and vertical
* (Point.y) directions.
* */
public Point getNumTiles(Point co) {
return imgdatasrc.getNumTiles(co);
}
/**
* Returns the total number of tiles in the image.
*
* <p>This default implementation returns the value of the source.</p>
*
* @return The total number of tiles in the image.
* */
public int getNumTiles() {
return imgdatasrc.getNumTiles();
}
}