- /*
- * 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
- *
- * @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;
- }
-
- }