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Main ACS AEM Commons OSGi Bundle. Includes commons utilities.
/*
* #%L
* ACS AEM Commons Bundle
* %%
* Copyright (C) 2013 Adobe
* %%
* 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.
* #L%
*/
package com.adobe.acs.commons.images.transformers.impl;
import com.adobe.acs.commons.images.ImageTransformer;
import com.day.image.Layer;
import org.apache.commons.lang.StringUtils;
import org.apache.felix.scr.annotations.Component;
import org.apache.felix.scr.annotations.Properties;
import org.apache.felix.scr.annotations.Property;
import org.apache.felix.scr.annotations.Service;
import org.apache.sling.api.resource.ValueMap;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* ACS AEM Commons - Image Transformer - Sharpening
* ImageTransformer that sharpens the layer. Accepts op_usm as parameter.
*
* op_usm is unsharp mask technique. It accepts 2 comma separated values: amount, radius.
* amount: filter strength factor (real 0…5)
* radius: filter kernel radius in pixels (real 0…250)
*
*/
@Component
@Properties({
@Property(name = ImageTransformer.PROP_TYPE, value = SharpenImageTransformerImpl.TYPE)
})
@Service
public class SharpenImageTransformerImpl implements ImageTransformer {
private static final Logger log = LoggerFactory.getLogger(SharpenImageTransformerImpl.class);
static final String TYPE = "sharpen";
private static final String KEY_UNSHARP_MASK = "op_usm";
private static final int NUM_SHARPEN_PARAMS = 2;
@Override
public final Layer transform(final Layer layer, final ValueMap properties) {
if (properties == null || properties.isEmpty()) {
log.warn("Transform [ {} ] requires parameters.", TYPE);
return layer;
}
log.debug("Transforming with [ {} ]", TYPE);
String unsharpenMask = StringUtils.trim(properties.get(KEY_UNSHARP_MASK, String.class));
try {
if(!unsharpenMask.isEmpty()) {
String[] param = unsharpenMask.split(",");
// Support is provided for amount and radius only.
if(param.length == NUM_SHARPEN_PARAMS) {
float amount = Float.parseFloat(param[0]);
float radius = Float.parseFloat(param[1]);
layer.sharpen(amount, radius);
} else {
log.warn("Transform [ {} ] requires 2 parameters.", TYPE);
}
}
} catch (NumberFormatException exception) {
log.warn("Transform [ {} ] requires floating type values.", TYPE);
log.error("Exception occured while parsing string to float", exception);
}
return layer;
}
}