| /* |
| |
| 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.batik.bridge; |
| |
| import java.awt.geom.Rectangle2D; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.apache.batik.ext.awt.image.CompositeRule; |
| import org.apache.batik.ext.awt.image.PadMode; |
| import org.apache.batik.ext.awt.image.renderable.CompositeRable8Bit; |
| import org.apache.batik.ext.awt.image.renderable.Filter; |
| import org.apache.batik.ext.awt.image.renderable.PadRable8Bit; |
| import org.apache.batik.gvt.GraphicsNode; |
| import org.w3c.dom.Element; |
| |
| /** |
| * Bridge class for the <feBlend> element. |
| * |
| * @author <a href="mailto:tkormann@apache.org">Thierry Kormann</a> |
| * @version $Id$ |
| */ |
| public class SVGFeBlendElementBridge |
| extends AbstractSVGFilterPrimitiveElementBridge { |
| |
| |
| /** |
| * Constructs a new bridge for the <feBlend> element. |
| */ |
| public SVGFeBlendElementBridge() {} |
| |
| /** |
| * Returns 'feBlend'. |
| */ |
| public String getLocalName() { |
| return SVG_FE_BLEND_TAG; |
| } |
| |
| /** |
| * Creates a <code>Filter</code> primitive according to the specified |
| * parameters. |
| * |
| * @param ctx the bridge context to use |
| * @param filterElement the element that defines a filter |
| * @param filteredElement the element that references the filter |
| * @param filteredNode the graphics node to filter |
| * |
| * @param inputFilter the <code>Filter</code> that represents the current |
| * filter input if the filter chain. |
| * @param filterRegion the filter area defined for the filter chain |
| * the new node will be part of. |
| * @param filterMap a map where the mediator can map a name to the |
| * <code>Filter</code> it creates. Other <code>FilterBridge</code>s |
| * can then access a filter node from the filterMap if they |
| * know its name. |
| */ |
| public Filter createFilter(BridgeContext ctx, |
| Element filterElement, |
| Element filteredElement, |
| GraphicsNode filteredNode, |
| Filter inputFilter, |
| Rectangle2D filterRegion, |
| Map filterMap) { |
| |
| |
| // 'mode' attribute - default is 'normal' |
| CompositeRule rule = convertMode(filterElement, ctx); |
| |
| // 'in' attribute |
| Filter in = getIn(filterElement, |
| filteredElement, |
| filteredNode, |
| inputFilter, |
| filterMap, |
| ctx); |
| if (in == null) { |
| return null; // disable the filter |
| } |
| |
| // 'in2' attribute - required |
| Filter in2 = getIn2(filterElement, |
| filteredElement, |
| filteredNode, |
| inputFilter, |
| filterMap, |
| ctx); |
| if (in2 == null) { |
| return null; // disable the filter |
| } |
| |
| Rectangle2D defaultRegion; |
| defaultRegion = (Rectangle2D)in.getBounds2D().clone(); |
| defaultRegion.add(in2.getBounds2D()); |
| |
| // get filter primitive chain region |
| Rectangle2D primitiveRegion |
| = SVGUtilities.convertFilterPrimitiveRegion(filterElement, |
| filteredElement, |
| filteredNode, |
| defaultRegion, |
| filterRegion, |
| ctx); |
| |
| // build the blend filter |
| List srcs = new ArrayList(2); |
| srcs.add(in2); |
| srcs.add(in); |
| |
| Filter filter = new CompositeRable8Bit(srcs, rule, true); |
| // handle the 'color-interpolation-filters' property |
| handleColorInterpolationFilters(filter, filterElement); |
| |
| filter = new PadRable8Bit(filter, primitiveRegion, PadMode.ZERO_PAD); |
| |
| // update the filter Map |
| updateFilterMap(filterElement, filter, filterMap); |
| |
| |
| return filter; |
| } |
| |
| /** |
| * Converts the 'mode' of the specified feBlend filter primitive. |
| * |
| * @param filterElement the filter feBlend element |
| */ |
| protected static CompositeRule convertMode(Element filterElement, |
| BridgeContext ctx) { |
| String rule = filterElement.getAttributeNS(null, SVG_MODE_ATTRIBUTE); |
| if (rule.length() == 0) { |
| return CompositeRule.OVER; |
| } |
| if (SVG_NORMAL_VALUE.equals(rule)) { |
| return CompositeRule.OVER; |
| } |
| if (SVG_MULTIPLY_VALUE.equals(rule)) { |
| return CompositeRule.MULTIPLY; |
| } |
| if (SVG_SCREEN_VALUE.equals(rule)) { |
| return CompositeRule.SCREEN; |
| } |
| if (SVG_DARKEN_VALUE.equals(rule)) { |
| return CompositeRule.DARKEN; |
| } |
| if (SVG_LIGHTEN_VALUE.equals(rule)) { |
| return CompositeRule.LIGHTEN; |
| } |
| throw new BridgeException |
| (ctx, filterElement, ERR_ATTRIBUTE_VALUE_MALFORMED, |
| new Object[] {SVG_MODE_ATTRIBUTE, rule}); |
| } |
| } |