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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 java.awt.image.BufferedImage;
import java.awt.image.renderable.ParameterBlock;
import javax.media.jai.JAI;
import javax.media.jai.PlanarImage;
import org.apache.tools.ant.types.EnumeratedAttribute;
/**
*
* @see org.apache.tools.ant.taskdefs.optional.image.Image
*/
public class Scale extends TransformOperation implements DrawOperation {
private static final int HUNDRED = 100;
private String widthStr = "100%";
private String heightStr = "100%";
private boolean xPercent = true;
private boolean yPercent = true;
private String proportions = "ignore";
/** Enumerated class for proportions attribute. */
public static class ProportionsAttribute extends EnumeratedAttribute {
/** {@inheritDoc}. */
public String[] getValues() {
return new String[] {"ignore", "width", "height", "cover", "fit"};
}
}
/**
* Sets the behaviour regarding the image proportions.
* @param pa the enumerated value.
*/
public void setProportions(ProportionsAttribute pa) {
proportions = pa.getValue();
}
/**
* Sets the width of the image, either as an integer or a %.
* Defaults to 100%.
* @param width the value to use.
*/
public void setWidth(String width) {
widthStr = width;
}
/**
* Sets the height of the image, either as an integer or a %. Defaults to 100%.
* @param height the value to use.
*/
public void setHeight(String height) {
heightStr = height;
}
/**
* Get the width.
* @return the value converted from the width string.
*/
public float getWidth() {
float width = 0.0F;
int percIndex = widthStr.indexOf('%');
if (percIndex > 0) {
width = Float.parseFloat(widthStr.substring(0, percIndex));
xPercent = true;
return width / HUNDRED;
} else {
xPercent = false;
return Float.parseFloat(widthStr);
}
}
/**
* Get the height.
* @return the value converted from the height string.
*/
public float getHeight() {
int percIndex = heightStr.indexOf('%');
if (percIndex > 0) {
float height = Float.parseFloat(heightStr.substring(0, percIndex));
yPercent = true;
return height / HUNDRED;
} else {
yPercent = false;
return Float.parseFloat(heightStr);
}
}
/**
* Scale an image.
* @param image the image to scale.
* @return the scaled image.
*/
public PlanarImage performScale(PlanarImage image) {
ParameterBlock pb = new ParameterBlock();
pb.addSource(image);
float xFl = getWidth();
float yFl = getHeight();
if (!xPercent) {
xFl = (xFl / image.getWidth());
}
if (!yPercent) {
yFl = (yFl / image.getHeight());
}
if ("width".equals(proportions)) {
yFl = xFl;
} else if ("height".equals(proportions)) {
xFl = yFl;
} else if ("fit".equals(proportions)) {
yFl = Math.min(xFl, yFl);
xFl = yFl;
} else if ("cover".equals(proportions)) {
yFl = Math.max(xFl, yFl);
xFl = yFl;
}
pb.add(new Float(xFl));
pb.add(new Float(yFl));
log("\tScaling to " + (xFl * HUNDRED) + "% x "
+ (yFl * HUNDRED) + "%");
return JAI.create("scale", pb);
}
/** {@inheritDoc}. */
public PlanarImage executeTransformOperation(PlanarImage image) {
BufferedImage bi = null;
final int size = instructions.size();
for (int i = 0; i < size; i++) {
ImageOperation instr = ((ImageOperation) instructions.elementAt(i));
if (instr instanceof DrawOperation) {
return performScale(image);
} else if (instr instanceof TransformOperation) {
bi = image.getAsBufferedImage();
image = ((TransformOperation) instr)
.executeTransformOperation(PlanarImage.wrapRenderedImage(bi));
bi = image.getAsBufferedImage();
}
}
return performScale(image);
}
/** {@inheritDoc}. */
public PlanarImage executeDrawOperation() {
final int size = instructions.size();
for (int i = 0; i < size; i++) {
ImageOperation instr = ((ImageOperation) instructions.elementAt(i));
if (instr instanceof DrawOperation) {
PlanarImage image = null;
// If this TransformOperation has DrawOperation children
// then Rotate the first child and return.
performScale(image);
return image;
}
}
return null;
}
}
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