/*
* Copyright 1999-2101 Alibaba Group.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.alibaba.simpleimage.render;
import java.io.InputStream;
import javax.media.jai.PlanarImage;
import com.alibaba.simpleimage.ImageFormat;
import com.alibaba.simpleimage.ImageRender;
import com.alibaba.simpleimage.ImageWrapper;
import com.alibaba.simpleimage.SimpleImageException;
import com.alibaba.simpleimage.util.ImageScaleHelper;
public class ScaleRender extends ImageRender {
private ScaleParameter zoom = null;
private ImageWrapper imgWrapper = null;
public ScaleRender(ImageRender imageRender, ScaleParameter p){
super(imageRender);
this.zoom = p;
}
public ScaleRender(ImageWrapper imgWrapper, ScaleParameter p){
super(null);
this.zoom = p;
this.imgWrapper = imgWrapper;
}
public ScaleRender(InputStream input, ScaleParameter param){
super(new ReadRender(input));
this.zoom = param;
}
public ScaleRender(InputStream input, boolean tosRGBColorSpace, ScaleParameter param){
super(new ReadRender(input, tosRGBColorSpace));
this.zoom = param;
}
/*
* (non-Javadoc)
* @see com.alibaba.simpleimage.ImageRender#dispose()
*/
@Override
public void dispose() throws SimpleImageException {
super.dispose();
this.zoom = null;
}
/*
* (non-Javadoc)
* @see com.alibaba.simpleimage.ImageRender#render()
*/
@Override
public ImageWrapper render() throws SimpleImageException {
if(imgWrapper == null) {
imgWrapper = imageRender.render();
}
if (zoom == null) {
return imgWrapper;
}
if(imgWrapper.getImageFormat() == ImageFormat.GIF) {
imgWrapper = ImageScaleHelper.scaleGIF(imgWrapper, zoom);
} else {
PlanarImage img = ImageScaleHelper.scale(imgWrapper.getAsPlanarImage(), zoom);
imgWrapper.setImage(img);
}
return imgWrapper;
}
/**
* @return the zoom
*/
public ScaleParameter getZoom() {
return zoom;
}
/**
* @param zoom the zoom to set
*/
public void setZoom(ScaleParameter zoom) {
this.zoom = zoom;
}
}