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   this work for additional information regarding copyright ownership.
   The ASF licenses this file to You under the Apache License, Version 2.0
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       http://www.apache.org/licenses/LICENSE-2.0

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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.PadMode;
import org.apache.batik.ext.awt.image.renderable.ColorMatrixRable;
import org.apache.batik.ext.awt.image.renderable.ColorMatrixRable8Bit;
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 <feColorMatrix> element.
Author:Thierry Kormann
Version:$Id: SVGFeColorMatrixElementBridge.java 1808888 2017-09-19 14:22:11Z ssteiner $
/** * Bridge class for the &lt;feColorMatrix&gt; element. * * @author <a href="mailto:tkormann@apache.org">Thierry Kormann</a> * @version $Id: SVGFeColorMatrixElementBridge.java 1808888 2017-09-19 14:22:11Z ssteiner $ */
public class SVGFeColorMatrixElementBridge extends AbstractSVGFilterPrimitiveElementBridge {
Constructs a new bridge for the <feColorMatrix> element.
/** * Constructs a new bridge for the &lt;feColorMatrix&gt; element. */
public SVGFeColorMatrixElementBridge() {}
Returns 'feColorMatrix'.
/** * Returns 'feColorMatrix'. */
public String getLocalName() { return SVG_FE_COLOR_MATRIX_TAG; }
Creates a Filter primitive according to the specified parameters.
Params:
  • ctx – the bridge context to use
  • filterElement – the element that defines a filter
  • filteredElement – the element that references the filter
  • filteredNode – the graphics node to filter
  • inputFilter – the Filter that represents the current filter input if the filter chain.
  • filterRegion – the filter area defined for the filter chain the new node will be part of.
  • filterMap – a map where the mediator can map a name to the Filter it creates. Other FilterBridges can then access a filter node from the filterMap if they know its name.
/** * 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) { // 'in' attribute Filter in = getIn(filterElement, filteredElement, filteredNode, inputFilter, filterMap, ctx); if (in == null) { return null; // disable the filter } // Default region is the size of in (if in is SourceGraphic or // SourceAlpha it will already include a pad/crop to the // proper filter region size). Rectangle2D defaultRegion = in.getBounds2D(); Rectangle2D primitiveRegion = SVGUtilities.convertFilterPrimitiveRegion(filterElement, filteredElement, filteredNode, defaultRegion, filterRegion, ctx); int type = convertType(filterElement, ctx); ColorMatrixRable colorMatrix; switch (type) { case ColorMatrixRable.TYPE_HUE_ROTATE: float a = convertValuesToHueRotate(filterElement, ctx); colorMatrix = ColorMatrixRable8Bit.buildHueRotate(a); break; case ColorMatrixRable.TYPE_LUMINANCE_TO_ALPHA: colorMatrix = ColorMatrixRable8Bit.buildLuminanceToAlpha(); break; case ColorMatrixRable.TYPE_MATRIX: float [][] matrix = convertValuesToMatrix(filterElement, ctx); colorMatrix = ColorMatrixRable8Bit.buildMatrix(matrix); break; case ColorMatrixRable.TYPE_SATURATE: float s = convertValuesToSaturate(filterElement, ctx); colorMatrix = ColorMatrixRable8Bit.buildSaturate(s); break; default: throw new RuntimeException("invalid convertType:" + type ); // can't be reached } colorMatrix.setSource(in); // handle the 'color-interpolation-filters' property handleColorInterpolationFilters(colorMatrix, filterElement); Filter filter = new PadRable8Bit(colorMatrix, primitiveRegion, PadMode.ZERO_PAD); // update the filter Map updateFilterMap(filterElement, filter, filterMap); return filter; }
Converts the 'values' attribute of the specified feColorMatrix filter primitive element for the 'matrix' type.
Params:
  • filterElement – the filter element
  • ctx – the BridgeContext to use for error information
/** * Converts the 'values' attribute of the specified feColorMatrix * filter primitive element for the 'matrix' type. * * @param filterElement the filter element * @param ctx the BridgeContext to use for error information */
protected static float[][] convertValuesToMatrix(Element filterElement, BridgeContext ctx) { String s = filterElement.getAttributeNS(null, SVG_VALUES_ATTRIBUTE); float [][] matrix = new float[4][5]; if (s.length() == 0) { matrix[0][0] = 1; matrix[1][1] = 1; matrix[2][2] = 1; matrix[3][3] = 1; return matrix; } StringTokenizer tokens = new StringTokenizer(s, " ,"); int n = 0; try { while (n < 20 && tokens.hasMoreTokens()) { matrix[n/5][n%5] = SVGUtilities.convertSVGNumber(tokens.nextToken()); n++; } } catch (NumberFormatException nfEx ) { throw new BridgeException (ctx, filterElement, nfEx, ERR_ATTRIBUTE_VALUE_MALFORMED, new Object[] {SVG_VALUES_ATTRIBUTE, s, nfEx }); } if (n != 20 || tokens.hasMoreTokens()) { throw new BridgeException (ctx, filterElement, ERR_ATTRIBUTE_VALUE_MALFORMED, new Object[] {SVG_VALUES_ATTRIBUTE, s}); } for (int i = 0; i < 4; ++i) { matrix[i][4] *= 255; } return matrix; }
Converts the 'values' attribute of the specified feColorMatrix filter primitive element for the 'saturate' type.
Params:
  • filterElement – the filter element
  • ctx – the BridgeContext to use for error information
/** * Converts the 'values' attribute of the specified feColorMatrix * filter primitive element for the 'saturate' type. * * @param filterElement the filter element * @param ctx the BridgeContext to use for error information */
protected static float convertValuesToSaturate(Element filterElement, BridgeContext ctx) { String s = filterElement.getAttributeNS(null, SVG_VALUES_ATTRIBUTE); if (s.length() == 0) return 1; // default is 1 try { return SVGUtilities.convertSVGNumber(s); } catch (NumberFormatException nfEx ) { throw new BridgeException (ctx, filterElement, nfEx, ERR_ATTRIBUTE_VALUE_MALFORMED, new Object[] {SVG_VALUES_ATTRIBUTE, s}); } }
Converts the 'values' attribute of the specified feColorMatrix filter primitive element for the 'hueRotate' type.
Params:
  • filterElement – the filter element
  • ctx – the BridgeContext to use for error information
/** * Converts the 'values' attribute of the specified feColorMatrix * filter primitive element for the 'hueRotate' type. * * @param filterElement the filter element * @param ctx the BridgeContext to use for error information */
protected static float convertValuesToHueRotate(Element filterElement, BridgeContext ctx) { String s = filterElement.getAttributeNS(null, SVG_VALUES_ATTRIBUTE); if (s.length() == 0) return 0; // default is 0 try { return (float) Math.toRadians( SVGUtilities.convertSVGNumber(s) ); } catch (NumberFormatException nfEx ) { throw new BridgeException (ctx, filterElement, nfEx, ERR_ATTRIBUTE_VALUE_MALFORMED, new Object [] {SVG_VALUES_ATTRIBUTE, s}); } }
Converts the type of the specified color matrix filter primitive.
Params:
  • filterElement – the filter element
  • ctx – the BridgeContext to use for error information
/** * Converts the type of the specified color matrix filter primitive. * * @param filterElement the filter element * @param ctx the BridgeContext to use for error information */
protected static int convertType(Element filterElement, BridgeContext ctx) { String s = filterElement.getAttributeNS(null, SVG_TYPE_ATTRIBUTE); if (s.length() == 0) { return ColorMatrixRable.TYPE_MATRIX; } if (SVG_HUE_ROTATE_VALUE.equals(s)) { return ColorMatrixRable.TYPE_HUE_ROTATE; } if (SVG_LUMINANCE_TO_ALPHA_VALUE.equals(s)) { return ColorMatrixRable.TYPE_LUMINANCE_TO_ALPHA; } if (SVG_MATRIX_VALUE.equals(s)) { return ColorMatrixRable.TYPE_MATRIX; } if (SVG_SATURATE_VALUE.equals(s)) { return ColorMatrixRable.TYPE_SATURATE; } throw new BridgeException (ctx, filterElement, ERR_ATTRIBUTE_VALUE_MALFORMED, new Object[] {SVG_TYPE_ATTRIBUTE, s}); } }