| /* |
| |
| 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.ARGBChannel; |
| import org.apache.batik.ext.awt.image.PadMode; |
| import org.apache.batik.ext.awt.image.renderable.DisplacementMapRable8Bit; |
| import org.apache.batik.ext.awt.image.renderable.Filter; |
| import org.apache.batik.ext.awt.image.renderable.PadRable; |
| import org.apache.batik.ext.awt.image.renderable.PadRable8Bit; |
| import org.apache.batik.gvt.GraphicsNode; |
| import org.w3c.dom.Element; |
| |
| /** |
| * Bridge class for the <feDisplacementMap> element. |
| * |
| * @author <a href="mailto:tkormann@apache.org">Thierry Kormann</a> |
| * @version $Id$ |
| */ |
| public class SVGFeDisplacementMapElementBridge |
| extends AbstractSVGFilterPrimitiveElementBridge { |
| |
| |
| /** |
| * Constructs a new bridge for the <feDisplacementMap> element. |
| */ |
| public SVGFeDisplacementMapElementBridge() {} |
| |
| /** |
| * Returns 'feDisplacementMap'. |
| */ |
| public String getLocalName() { |
| return SVG_FE_DISPLACEMENT_MAP_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) { |
| |
| // 'scale' attribute - default is 0 |
| float scale = convertNumber(filterElement, SVG_SCALE_ATTRIBUTE, 0, ctx); |
| |
| // 'xChannelSelector' attribute - default is 'A' |
| ARGBChannel xChannelSelector = convertChannelSelector |
| (filterElement, SVG_X_CHANNEL_SELECTOR_ATTRIBUTE, ARGBChannel.A, |
| ctx); |
| |
| // 'yChannelSelector' attribute - default is 'A' |
| ARGBChannel yChannelSelector = convertChannelSelector |
| (filterElement, SVG_Y_CHANNEL_SELECTOR_ATTRIBUTE, ARGBChannel.A, |
| 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); |
| |
| PadRable pad |
| = new PadRable8Bit(in, primitiveRegion, PadMode.ZERO_PAD); |
| |
| // build the displacement map filter |
| List srcs = new ArrayList(2); |
| srcs.add(pad); |
| srcs.add(in2); |
| Filter displacementMap = new DisplacementMapRable8Bit |
| (srcs, scale, xChannelSelector, yChannelSelector); |
| |
| // handle the 'color-interpolation-filters' property |
| handleColorInterpolationFilters(displacementMap, filterElement); |
| |
| PadRable filter = new PadRable8Bit |
| (displacementMap, primitiveRegion, PadMode.ZERO_PAD); |
| |
| // update the filter Map |
| updateFilterMap(filterElement, filter, filterMap); |
| |
| return filter; |
| } |
| |
| /** |
| * Returns the channel for the specified feDisplacementMap filter |
| * primitive attribute, considering the specified attribute name. |
| * |
| * @param filterElement the feDisplacementMap filter primitive element |
| * @param attrName the name of the channel attribute |
| * @param ctx the BridgeContext to use for error information |
| */ |
| protected static |
| ARGBChannel convertChannelSelector(Element filterElement, |
| String attrName, |
| ARGBChannel defaultChannel, |
| BridgeContext ctx) { |
| |
| String s = filterElement.getAttributeNS(null, attrName); |
| if (s.length() == 0) { |
| return defaultChannel; |
| } |
| if (SVG_A_VALUE.equals(s)) { |
| return ARGBChannel.A; |
| } |
| if (SVG_R_VALUE.equals(s)) { |
| return ARGBChannel.R; |
| } |
| if (SVG_G_VALUE.equals(s)) { |
| return ARGBChannel.G; |
| } |
| if (SVG_B_VALUE.equals(s)) { |
| return ARGBChannel.B; |
| } |
| throw new BridgeException |
| (ctx, filterElement, ERR_ATTRIBUTE_VALUE_MALFORMED, |
| new Object[] {attrName, s}); |
| } |
| } |