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/*
* Gray8Rect.java
*
* Created on September 9, 2006, 2:52 PM
*
* To change this template, choose Tools | Template Manager
* and open the template in the editor.
*
* Copyright 2007 by Jon A. Webb
* 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; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the Lesser GNU General Public License
* along with this program. If not, see .
*
*/
package com.github.ojil.algorithm;
import com.github.ojil.core.Error;
import com.github.ojil.core.Gray8Image;
import com.github.ojil.core.Image;
import com.github.ojil.core.PipelineStage;
/**
* Pipeline stage assigns a constant value to a rectangle in an input Gray8Image
* to produce an output Gray8Image.
* @author webb
*/
public class Gray8Rect extends PipelineStage {
private int cX, cY, nWidth, nHeight;
private byte bValue;
/**
* Creates a new instance of Gray8Rect.
* @param cX The horizontal offset of the rectangle.
* @param cY the vertical offset of the rectangle.
* @param nWidth the width of the rectangle.
* @param nHeight the height of the rectangle.
* @param bValue the value to be assigned to the rectangle.
* @throws com.github.ojil.core.Error if the height or width of the rectange is negative or zero.
*/
public Gray8Rect(int cX, int cY, int nWidth, int nHeight, byte bValue)
throws com.github.ojil.core.Error {
setWindow(cX, cY, nWidth, nHeight);
this.bValue = bValue;
}
/**
* Assigns a constant rectangle to the input Gray8Image, replacing values in the image.
* @param image the input image (output replaces input).
* @throws com.github.ojil.core.Error if the input is not a Gray8Image.
*/
public void push(Image image) throws com.github.ojil.core.Error {
if (!(image instanceof Gray8Image)) {
throw new Error(
Error.PACKAGE.ALGORITHM,
ErrorCodes.IMAGE_NOT_GRAY8IMAGE,
image.toString(),
null,
null);
}
Gray8Image input = (Gray8Image) image;
Byte[] data = input.getData();
int nLimitY = Math.min(input.getHeight(), this.cY + this.nHeight);
int nLimitX = Math.min(input.getWidth(), this.cX + this.nWidth);
for (int i=this.cY; i
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