87 lines
2.6 KiB
Java
87 lines
2.6 KiB
Java
/**
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*
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* Copyright 2006 Jerry Huxtable
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.jivesoftware.smackx.jingleold.mediaimpl.sshare.api;
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import java.awt.Rectangle;
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import java.awt.image.BufferedImage;
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import java.awt.image.ColorModel;
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import java.awt.image.WritableRaster;
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/**
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* A filter which acts as a superclass for filters which need to have the whole image in memory
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* to do their stuff.
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*/
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public abstract class WholeImageFilter extends AbstractBufferedImageOp {
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/**
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* The output image bounds.
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*/
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protected Rectangle transformedSpace;
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/**
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* The input image bounds.
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*/
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protected Rectangle originalSpace;
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/**
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* Construct a WholeImageFilter.
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*/
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public WholeImageFilter() {
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}
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public BufferedImage filter( BufferedImage src, BufferedImage dst ) {
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int width = src.getWidth();
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int height = src.getHeight();
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int type = src.getType();
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WritableRaster srcRaster = src.getRaster();
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originalSpace = new Rectangle(0, 0, width, height);
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transformedSpace = new Rectangle(0, 0, width, height);
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transformSpace(transformedSpace);
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if ( dst == null ) {
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ColorModel dstCM = src.getColorModel();
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dst = new BufferedImage(dstCM, dstCM.createCompatibleWritableRaster(transformedSpace.width, transformedSpace.height), dstCM.isAlphaPremultiplied(), null);
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}
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WritableRaster dstRaster = dst.getRaster();
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int[] inPixels = getRGB( src, 0, 0, width, height, null );
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inPixels = filterPixels( width, height, inPixels, transformedSpace );
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setRGB( dst, 0, 0, transformedSpace.width, transformedSpace.height, inPixels );
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return dst;
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}
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/**
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* Calculate output bounds for given input bounds.
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* @param rect input and output rectangle
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*/
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protected void transformSpace(Rectangle rect) {
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}
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/**
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* Actually filter the pixels.
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* @param width the image width
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* @param height the image height
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* @param inPixels the image pixels
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* @param transformedSpace the output bounds
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* @return the output pixels
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*/
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protected abstract int[] filterPixels( int width, int height, int[] inPixels, Rectangle transformedSpace );
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}
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