| /* |
| |
| 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.Map; |
| import java.util.StringTokenizer; |
| |
| import org.apache.batik.ext.awt.image.renderable.Filter; |
| import org.apache.batik.ext.awt.image.renderable.TurbulenceRable; |
| import org.apache.batik.ext.awt.image.renderable.TurbulenceRable8Bit; |
| import org.apache.batik.gvt.GraphicsNode; |
| import org.w3c.dom.Element; |
| |
| /** |
| * Bridge class for the <feTurbulence> element. |
| * |
| * @author <a href="mailto:tkormann@apache.org">Thierry Kormann</a> |
| * @version $Id$ |
| */ |
| public class SVGFeTurbulenceElementBridge |
| extends AbstractSVGFilterPrimitiveElementBridge { |
| |
| /** |
| * Constructs a new bridge for the <feTurbulence> element. |
| */ |
| public SVGFeTurbulenceElementBridge() {} |
| |
| /** |
| * Returns 'feTurbulence'. |
| */ |
| public String getLocalName() { |
| return SVG_FE_TURBULENCE_TAG; |
| } |
| |
| /** |
| * Creates a <tt>Filter</tt> 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 <tt>Filter</tt> 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 |
| * <tt>Filter</tt> it creates. Other <tt>FilterBridge</tt>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) { |
| |
| // 'in' attribute |
| Filter in = getIn(filterElement, |
| filteredElement, |
| filteredNode, |
| inputFilter, |
| filterMap, |
| ctx); |
| if (in == null) { |
| return null; // disable the filter |
| } |
| |
| // default region is the filter chain region |
| Rectangle2D defaultRegion = filterRegion; |
| Rectangle2D primitiveRegion |
| = SVGUtilities.convertFilterPrimitiveRegion(filterElement, |
| filteredElement, |
| filteredNode, |
| defaultRegion, |
| filterRegion, |
| ctx); |
| |
| // 'baseFrequency' attribute - default is [0, 0] |
| float [] baseFrequency |
| = convertBaseFrenquency(filterElement, ctx); |
| |
| // 'numOctaves' attribute - default is 1 |
| int numOctaves |
| = convertInteger(filterElement, SVG_NUM_OCTAVES_ATTRIBUTE, 1, ctx); |
| |
| // 'seed' attribute - default is 0 |
| int seed |
| = convertInteger(filterElement, SVG_SEED_ATTRIBUTE, 0, ctx); |
| |
| // 'stitchTiles' attribute - default is 'noStitch' |
| boolean stitchTiles |
| = convertStitchTiles(filterElement, ctx); |
| |
| // 'fractalNoise' attribute - default is 'turbulence' |
| boolean isFractalNoise |
| = convertType(filterElement, ctx); |
| |
| // create the filter primitive |
| TurbulenceRable turbulenceRable |
| = new TurbulenceRable8Bit(primitiveRegion); |
| |
| turbulenceRable.setBaseFrequencyX(baseFrequency[0]); |
| turbulenceRable.setBaseFrequencyY(baseFrequency[1]); |
| turbulenceRable.setNumOctaves(numOctaves); |
| turbulenceRable.setSeed(seed); |
| turbulenceRable.setStitched(stitchTiles); |
| turbulenceRable.setFractalNoise(isFractalNoise); |
| |
| // handle the 'color-interpolation-filters' property |
| handleColorInterpolationFilters(turbulenceRable, filterElement); |
| |
| // update the filter Map |
| updateFilterMap(filterElement, turbulenceRable, filterMap); |
| |
| return turbulenceRable; |
| } |
| |
| /** |
| * Converts the 'baseFrequency' attribute of the specified |
| * feTurbulence element. |
| * |
| * @param e the feTurbulence element |
| * @param ctx the BridgeContext to use for error information |
| */ |
| protected static float[] convertBaseFrenquency(Element e, |
| BridgeContext ctx) { |
| String s = e.getAttributeNS(null, SVG_BASE_FREQUENCY_ATTRIBUTE); |
| if (s.length() == 0) { |
| return new float[] {0.001f, 0.001f}; |
| } |
| float[] v = new float[2]; |
| StringTokenizer tokens = new StringTokenizer(s, " ,"); |
| try { |
| v[0] = SVGUtilities.convertSVGNumber(tokens.nextToken()); |
| if (tokens.hasMoreTokens()) { |
| v[1] = SVGUtilities.convertSVGNumber(tokens.nextToken()); |
| } else { |
| v[1] = v[0]; |
| } |
| if (tokens.hasMoreTokens()) { |
| throw new BridgeException |
| (ctx, e, ERR_ATTRIBUTE_VALUE_MALFORMED, |
| new Object[] {SVG_BASE_FREQUENCY_ATTRIBUTE, s}); |
| } |
| } catch (NumberFormatException nfEx ) { |
| throw new BridgeException |
| (ctx, e, nfEx, ERR_ATTRIBUTE_VALUE_MALFORMED, |
| new Object[] {SVG_BASE_FREQUENCY_ATTRIBUTE, s}); |
| } |
| if (v[0] < 0 || v[1] < 0) { |
| throw new BridgeException |
| (ctx, e, ERR_ATTRIBUTE_VALUE_MALFORMED, |
| new Object[] {SVG_BASE_FREQUENCY_ATTRIBUTE, s}); |
| } |
| return v; |
| } |
| |
| /** |
| * Converts the 'stitchTiles' attribute of the specified |
| * feTurbulence element. |
| * |
| * @param e the feTurbulence element |
| * @param ctx the BridgeContext to use for error information |
| * @return true if stitchTiles attribute is 'stitch', false otherwise |
| */ |
| protected static boolean convertStitchTiles(Element e, BridgeContext ctx) { |
| String s = e.getAttributeNS(null, SVG_STITCH_TILES_ATTRIBUTE); |
| if (s.length() == 0) { |
| return false; |
| } |
| if (SVG_STITCH_VALUE.equals(s)) { |
| return true; |
| } |
| if (SVG_NO_STITCH_VALUE.equals(s)) { |
| return false; |
| } |
| throw new BridgeException(ctx, e, ERR_ATTRIBUTE_VALUE_MALFORMED, |
| new Object[] {SVG_STITCH_TILES_ATTRIBUTE, s}); |
| } |
| |
| /** |
| * Converts the 'type' attribute of the specified feTurbulence element. |
| * |
| * @param e the feTurbulence element |
| * @param ctx the BridgeContext to use for error information |
| * @return true if type attribute value is 'fractalNoise', false otherwise |
| */ |
| protected static boolean convertType(Element e, BridgeContext ctx) { |
| String s = e.getAttributeNS(null, SVG_TYPE_ATTRIBUTE); |
| if (s.length() == 0) { |
| return false; |
| } |
| if (SVG_FRACTAL_NOISE_VALUE.equals(s)) { |
| return true; |
| } |
| if (SVG_TURBULENCE_VALUE.equals(s)) { |
| return false; |
| } |
| throw new BridgeException(ctx, e, ERR_ATTRIBUTE_VALUE_MALFORMED, |
| new Object[] {SVG_TYPE_ATTRIBUTE, s}); |
| } |
| } |
