/*
* Copyright 2002-2004 The Apache Software Foundation
*
* 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 org.apache.tools.ant.types.optional.image;
import javax.media.jai.PlanarImage;
import javax.media.jai.InterpolationNearest;
import javax.media.jai.JAI;
import java.awt.image.renderable.ParameterBlock;
import java.awt.image.BufferedImage;
import java.awt.Graphics2D;
/**
* ImageOperation to rotate an image by a certain degree
*
* @author <a href="mailto:kzgrey@ntplx.net">Kevin Z Grey</a>
* @see org.apache.tools.ant.taskdefs.optional.image.Image
*/
public class Rotate extends TransformOperation implements DrawOperation {
protected float angle = 0.0F;
/**
* Sets the angle of rotation in degrees.
* @param ang The angle at which to rotate the image
*/
public void setAngle(String ang) {
angle = Float.parseFloat(ang);
}
public PlanarImage performRotate(PlanarImage image) {
float t_angle = (float) (angle * (Math.PI / 180.0F));
ParameterBlock pb = new ParameterBlock();
pb.addSource(image);
pb.add(0.0F);
pb.add(0.0F);
pb.add(t_angle);
pb.add(new InterpolationNearest());
return JAI.create("Rotate", pb, null);
}
/**
* Performs the image rotation when being handled as a TransformOperation.
* @param image The image to perform the transformation on.
*/
public PlanarImage executeTransformOperation(PlanarImage image) {
BufferedImage bi = null;
Graphics2D graphics = null;
for (int i = 0; i < instructions.size(); i++) {
ImageOperation instr = ((ImageOperation) instructions.elementAt(i));
if (instr instanceof DrawOperation) {
// If this TransformOperation has DrawOperation children
// then Rotate the first child and return.
System.out.println("Execing Draws");
PlanarImage op = ((DrawOperation) instr).executeDrawOperation();
image = performRotate(op);
return image;
} else if (instr instanceof TransformOperation) {
bi = image.getAsBufferedImage();
graphics = (Graphics2D) bi.getGraphics();
System.out.println("Execing Transforms");
image = ((TransformOperation) instr).executeTransformOperation(PlanarImage.wrapRenderedImage(bi));
bi = image.getAsBufferedImage();
}
}
System.out.println("Execing as TransformOperation");
image = performRotate(image);
System.out.println(image);
return image;
}
/**
* Performs the image rotation when being handled as a DrawOperation.
* It absolutely requires that there be a DrawOperation nested beneath it,
* but only the FIRST DrawOperation will be handled since it can only return
* ONE image.
*/
public PlanarImage executeDrawOperation() {
for (int i = 0; i < instructions.size(); i++) {
ImageOperation instr = ((ImageOperation) instructions.elementAt(i));
if (instr instanceof DrawOperation) {
// If this TransformOperation has DrawOperation children
// then Rotate the first child and return.
PlanarImage op = ((DrawOperation) instr).executeDrawOperation();
op = performRotate(op);
return op;
}
}
return null;
}
}