001: /*
002: * Copyright (c) 2007, intarsys consulting GmbH
003: *
004: * Redistribution and use in source and binary forms, with or without
005: * modification, are permitted provided that the following conditions are met:
006: *
007: * - Redistributions of source code must retain the above copyright notice,
008: * this list of conditions and the following disclaimer.
009: *
010: * - Redistributions in binary form must reproduce the above copyright notice,
011: * this list of conditions and the following disclaimer in the documentation
012: * and/or other materials provided with the distribution.
013: *
014: * - Neither the name of intarsys nor the names of its contributors may be used
015: * to endorse or promote products derived from this software without specific
016: * prior written permission.
017: *
018: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
019: * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
020: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
021: * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
022: * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
023: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
024: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
025: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
026: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
027: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
028: * POSSIBILITY OF SUCH DAMAGE.
029: */
030: package de.intarsys.pdf.pd;
031:
032: import de.intarsys.pdf.cos.COSArray;
033: import de.intarsys.pdf.cos.COSDictionary;
034: import de.intarsys.pdf.cos.COSName;
035: import de.intarsys.pdf.cos.COSNumber;
036: import de.intarsys.pdf.cos.COSObject;
037:
038: /**
039: * Evaluate a function when filling the shape.
040: *
041: */
042: public class PDFunctionBasedShading extends PDShading {
043: /**
044: * The meta class implementation
045: */
046: static public class MetaClass extends PDShading.MetaClass {
047: protected MetaClass(Class paramInstanceClass) {
048: super (paramInstanceClass);
049: }
050: }
051:
052: private static final COSName DK_Domain = COSName.constant("Domain"); //$NON-NLS-1$
053:
054: private static final COSName DK_Function = COSName
055: .constant("Function"); //$NON-NLS-1$
056:
057: private static final COSName DK_Matrix = COSName.constant("Matrix"); //$NON-NLS-1$
058:
059: /** The meta class instance */
060: static public final MetaClass META = new MetaClass(MetaClass.class
061: .getDeclaringClass());
062:
063: private float[] domain;
064:
065: private PDFunction function;
066:
067: private float[] matrix;
068:
069: protected PDFunctionBasedShading(COSObject object) {
070: super (object);
071:
072: COSArray cosDomain;
073: COSArray cosMatrix;
074:
075: cosDomain = (COSArray) ((COSDictionary) object).get(DK_Domain);
076: if (domain == null) {
077: domain = new float[] { 0, 1, 0, 1 };
078: } else {
079: domain = new float[4];
080: for (int index = 0; index < 4; index++) {
081: domain[index] = ((COSNumber) cosDomain.get(index))
082: .floatValue();
083: }
084: }
085:
086: cosMatrix = (COSArray) ((COSDictionary) object).get(DK_Matrix);
087: if (matrix == null) {
088: matrix = new float[] { 1, 0, 0, 1, 0, 0 };
089: } else {
090: matrix = new float[6];
091: for (int index = 0; index < 6; index++) {
092: matrix[index] = ((COSNumber) cosMatrix.get(index))
093: .floatValue();
094: }
095: }
096: }
097:
098: public float[] getDomain() {
099: return domain;
100: }
101:
102: public PDFunction getFunction() {
103: if (function == null) {
104: function = (PDFunction) PDFunction.META
105: .createFromCos(((COSDictionary) cosGetObject())
106: .get(DK_Function));
107: }
108: return function;
109: }
110:
111: public float[] getMatrix() {
112: return domain;
113: }
114:
115: public int getShadingType() {
116: return SHADING_TYPE_FUNCTIONBASED;
117: }
118: }
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