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1
51 package org.apache.fop.image;
52
53 import java.net.URL  ;
55 import java.io.ByteArrayOutputStream ;
56 import java.io.InputStream ;
57
58 import org.apache.fop.datatypes.ColorSpace;
60 import org.apache.fop.pdf.DCTFilter;
61 import org.apache.fop.image.analyser.ImageReader;
62
63
69 public class JpegImage extends AbstractFopImage {
70 boolean hasAPPEMarker = false;
71 boolean found_icc_profile = false;
72 boolean found_dimensions = false;
73
74 public JpegImage(URL href) throws FopImageException {
75 super(href);
76 }
77
78 public JpegImage(URL href,
79 ImageReader imgReader) throws FopImageException {
80 super(href, imgReader);
81 }
82
83 protected void loadImage() throws FopImageException {
84 ByteArrayOutputStream baos = new ByteArrayOutputStream ();
85 ByteArrayOutputStream iccStream = new ByteArrayOutputStream ();
86 InputStream inStream;
87 this.m_colorSpace = new ColorSpace(ColorSpace.DEVICE_UNKNOWN);
88 byte[] readBuf = new byte[4096];
89 int bytes_read;
90 int index = 0;
91 boolean cont = true;
92
93 this.m_compressionType = new DCTFilter();
94 this.m_compressionType.setApplied(true);
95
96 try {
97 inStream = this.m_href.openStream();
98
99 while ((bytes_read = inStream.read(readBuf)) != -1) {
100 baos.write(readBuf, 0, bytes_read);
101 }
102 } catch (java.io.IOException ex) {
103 throw new FopImageException("Error while loading image " +
104 this.m_href.toString() + " : " + ex.getClass() +
105 " - " + ex.getMessage());
106 }
107
108 this.m_bitmaps = baos.toByteArray();
109 this.m_bitsPerPixel = 8;
110 this.m_isTransparent = false;
111
112 if (this.m_bitmaps.length > (index + 2) &&
113 uByte(this.m_bitmaps[index]) == 255 &&
114 uByte(this.m_bitmaps[index + 1]) == 216) {
115 index += 2;
116
117 while (index < this.m_bitmaps.length && cont) {
118 if (this.m_bitmaps.length > (index + 2) &&
120 uByte(this.m_bitmaps[index]) == 255) {
121
122 if (uByte(this.m_bitmaps[index + 1]) == 192 ||
124 uByte(this.m_bitmaps[index + 1]) == 194) {
125
126 this.m_height = calcBytes(this.m_bitmaps[index + 5],
127 this.m_bitmaps[index + 6]);
128 this.m_width = calcBytes(this.m_bitmaps[index + 7],
129 this.m_bitmaps[index + 8]);
130
131 if (this.m_bitmaps[index + 9] == 1) {
132 this.m_colorSpace.setColorSpace(ColorSpace.DEVICE_GRAY);
133 } else if (this.m_bitmaps[index + 9] == 3) {
134 this.m_colorSpace.setColorSpace(ColorSpace.DEVICE_RGB);
135 } else if (this.m_bitmaps[index + 9] == 4) {
136 this.m_colorSpace.setColorSpace(ColorSpace.DEVICE_CMYK);
137 }
138
139 found_dimensions = true;
140 if (found_icc_profile) {
141 cont = false;
142 break;
143 }
144 index += calcBytes(this.m_bitmaps[index + 2],
145 this.m_bitmaps[index + 3]) + 2;
146
147 } else if (uByte(this.m_bitmaps[index+1]) == 226 &&
148 this.m_bitmaps.length > (index+60)) {
149 byte[] icc_string = new byte[11];
151 System.arraycopy(this.m_bitmaps, index+4, icc_string, 0, 11);
152
153
162 if ("ICC_PROFILE".equals(new String (icc_string))){
163 int chunkSize = calcBytes(this.m_bitmaps[index + 2],
164 this.m_bitmaps[index + 3]) + 2;
165
166 iccStream.write(this.m_bitmaps, index+16, chunkSize - 18); }
168
169 index += calcBytes(this.m_bitmaps[index + 2],
170 this.m_bitmaps[index + 3]) + 2;
171 } else if ((uByte(this.m_bitmaps[index]) == 0xff &&
173 uByte(this.m_bitmaps[index+1]) == 0xee &&
174 uByte(this.m_bitmaps[index+2]) == 0 &&
175 uByte(this.m_bitmaps[index+3]) == 14 &&
176 "Adobe".equals(new String (this.m_bitmaps, index+4, 5)))) {
177 hasAPPEMarker = true;
183
184 index += calcBytes(this.m_bitmaps[index + 2],
185 this.m_bitmaps[index + 3]) + 2;
186 } else {
187 index += calcBytes(this.m_bitmaps[index + 2],
188 this.m_bitmaps[index + 3]) + 2;
189 }
190
191
192 } else {
193 cont = false;
194
199 }
200 }
201 } else {
202 throw new FopImageException( "\n1 Error while loading image " +
203 this.m_href.toString() + " : JpegImage - Invalid JPEG Header.");
204 }
205 if (iccStream.size() > 0) {
206 byte[] align = new byte[((iccStream.size()) % 8) + 8];
207 try {iccStream.write(align);} catch (Exception e) {
208 throw new FopImageException( "\n1 Error while loading image " +
209 this.m_href.toString() + " : " + e.getMessage());
210 }
211 this.m_colorSpace.setICCProfile(iccStream.toByteArray());
212 }
213
214 if (hasAPPEMarker && this.m_colorSpace.getColorSpace() == ColorSpace.DEVICE_CMYK)
215 this.m_invertImage = true;
216 }
217
218 private int calcBytes(byte bOne, byte bTwo) {
219 return (uByte(bOne) * 256) + uByte(bTwo);
220 }
221
222 private int uByte(byte bIn) {
223 if (bIn < 0) {
224 return 256 + bIn;
225 } else {
226 return bIn;
227 }
228 }
229 }
230
231
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