|
1
47 package com.lowagie.text.pdf;
48
49 import java.io.IOException  ;
50
51 import com.lowagie.text.ExceptionConverter;
52
56 public class PdfFunction {
57
58 protected PdfWriter writer;
59
60 protected PdfIndirectReference reference;
61
62 protected PdfDictionary dictionary;
63
64
65 protected PdfFunction(PdfWriter writer) {
66 this.writer = writer;
67 }
68
69 PdfIndirectReference getReference() {
70 try {
71 if (reference == null) {
72 reference = writer.addToBody(dictionary).getIndirectReference();
73 }
74 }
75 catch (IOException ioe) {
76 throw new ExceptionConverter(ioe);
77 }
78 return reference;
79 }
80
81 public static PdfFunction type0(PdfWriter writer, float domain[], float range[], int size[],
82 int bitsPerSample, int order, float encode[], float decode[], byte stream[]) {
83 PdfFunction func = new PdfFunction(writer);
84 func.dictionary = new PdfStream(stream);
85 ((PdfStream)func.dictionary).flateCompress();
86 func.dictionary.put(PdfName.FUNCTIONTYPE, new PdfNumber(0));
87 func.dictionary.put(PdfName.DOMAIN, new PdfArray(domain));
88 func.dictionary.put(PdfName.RANGE, new PdfArray(range));
89 func.dictionary.put(PdfName.SIZE, new PdfArray(size));
90 func.dictionary.put(PdfName.BITSPERSAMPLE, new PdfNumber(bitsPerSample));
91 if (order != 1)
92 func.dictionary.put(PdfName.ORDER, new PdfNumber(order));
93 if (encode != null)
94 func.dictionary.put(PdfName.ENCODE, new PdfArray(encode));
95 if (decode != null)
96 func.dictionary.put(PdfName.DECODE, new PdfArray(decode));
97 return func;
98 }
99
100 public static PdfFunction type2(PdfWriter writer, float domain[], float range[], float c0[], float c1[], float n) {
101 PdfFunction func = new PdfFunction(writer);
102 func.dictionary = new PdfDictionary();
103 func.dictionary.put(PdfName.FUNCTIONTYPE, new PdfNumber(2));
104 func.dictionary.put(PdfName.DOMAIN, new PdfArray(domain));
105 if (range != null)
106 func.dictionary.put(PdfName.RANGE, new PdfArray(range));
107 if (c0 != null)
108 func.dictionary.put(PdfName.C0, new PdfArray(c0));
109 if (c1 != null)
110 func.dictionary.put(PdfName.C1, new PdfArray(c1));
111 func.dictionary.put(PdfName.N, new PdfNumber(n));
112 return func;
113 }
114
115 public static PdfFunction type3(PdfWriter writer, float domain[], float range[], PdfFunction functions[], float bounds[], float encode[]) {
116 PdfFunction func = new PdfFunction(writer);
117 func.dictionary = new PdfDictionary();
118 func.dictionary.put(PdfName.FUNCTIONTYPE, new PdfNumber(3));
119 func.dictionary.put(PdfName.DOMAIN, new PdfArray(domain));
120 if (range != null)
121 func.dictionary.put(PdfName.RANGE, new PdfArray(range));
122 PdfArray array = new PdfArray();
123 for (int k = 0; k < functions.length; ++k)
124 array.add(functions[k].getReference());
125 func.dictionary.put(PdfName.FUNCTIONS, array);
126 func.dictionary.put(PdfName.BOUNDS, new PdfArray(bounds));
127 func.dictionary.put(PdfName.ENCODE, new PdfArray(encode));
128 return func;
129 }
130
131 public static PdfFunction type4(PdfWriter writer, float domain[], float range[], String postscript) {
132 byte b[] = new byte[postscript.length()];
133 for (int k = 0; k < b.length; ++k)
134 b[k] = (byte)postscript.charAt(k);
135 PdfFunction func = new PdfFunction(writer);
136 func.dictionary = new PdfStream(b);
137 ((PdfStream)func.dictionary).flateCompress();
138 func.dictionary.put(PdfName.FUNCTIONTYPE, new PdfNumber(4));
139 func.dictionary.put(PdfName.DOMAIN, new PdfArray(domain));
140 func.dictionary.put(PdfName.RANGE, new PdfArray(range));
141 return func;
142 }
143 }
144 |
Popular Tags |
Java API By Example, From Geeks To Geeks.