|
1
51 package org.apache.fop.image;
52
53 import java.net.URL  ;
55 import java.io.InputStream ;
56 import java.io.IOException ;
57
58 import org.apache.fop.datatypes.ColorSpace;
60 import org.apache.fop.image.analyser.ImageReader;
61
62
68 public class BmpImage extends AbstractFopImage {
69 public BmpImage(URL href) throws FopImageException {
70 super(href);
71 }
72
73 public BmpImage(URL href,
74 ImageReader imgReader) throws FopImageException {
75 super(href, imgReader);
76 }
77
78 protected void loadImage() throws FopImageException {
79 int wpos = 18;
80 int hpos = 22; int[] headermap = new int[54];
82 int filepos = 0;
83 InputStream file = null;
84 byte palette[] = null;
85 try {
86 file = this.m_href.openStream();
87 boolean eof = false;
88 while ((!eof) && (filepos < 54)) {
89 int input = file.read();
90 if (input == -1)
91 eof = true;
92 else
93 headermap[filepos++] = input;
94 }
95
96 if (headermap[28] == 4 || headermap[28] == 8) {
97 int palettesize = 1 << headermap[28];
98 palette = new byte[palettesize * 3];
99 int countr = 0;
100 while (!eof && countr < palettesize) {
101 int count2 = 2;
102 while (!eof && count2 >= -1) {
103 int input = file.read();
104 if (input == -1)
105 eof = true;
106 else if (count2 >= 0) {
107 palette[countr * 3 + count2] = (byte)(input
108 & 0xFF);
109 }
110 count2--;
111 filepos++;
112 }
113 countr++;
114 }
115 }
116 } catch (IOException e) {
117 throw new FopImageException("Error while loading image "
118 + this.m_href.toString() + " : "
119 + e.getClass() + " - "
120 + e.getMessage());
121 }
122 this.m_width = headermap[wpos] + headermap[wpos + 1] * 256
124 + headermap[wpos + 2] * 256 * 256
125 + headermap[wpos + 3] * 256 * 256 * 256;
126 this.m_height = headermap[hpos] + headermap[hpos + 1] * 256
127 + headermap[hpos + 2] * 256 * 256
128 + headermap[hpos + 3] * 256 * 256 * 256;
129
130 int imagestart = headermap[10] + headermap[11] * 256
131 + headermap[12] * 256 * 256
132 + headermap[13] * 256 * 256 * 256;
133 this.m_bitsPerPixel = headermap[28];
134 this.m_colorSpace = new ColorSpace(ColorSpace.DEVICE_RGB);
135 int bytes;
136 if (this.m_bitsPerPixel == 1)
137 bytes = (this.m_width + 7) / 8;
138 else if (this.m_bitsPerPixel == 24)
139 bytes = this.m_width * 3;
140 else if (this.m_bitsPerPixel == 4 || this.m_bitsPerPixel == 8)
141 bytes = this.m_width / (8 / this.m_bitsPerPixel);
142 else
143 throw new FopImageException("Image (" + this.m_href.toString()
144 + ") has " + this.m_bitsPerPixel
145 + " which is not a supported BMP format.");
146 if ((bytes & 0x03) != 0) {
147 bytes |= 0x03;
148 bytes++;
149 }
150
151 this.m_bitmapsSize = this.m_width * this.m_height * 3;
153 this.m_bitmaps = new byte[this.m_bitmapsSize];
154
155 int[] temp = new int[bytes * this.m_height];
156 try {
157 int input;
158 int count = 0;
159 file.skip((long)(imagestart - filepos));
160 while ((input = file.read()) != -1)
161 temp[count++] = input;
162 file.close();
163 } catch (IOException e) {
164 throw new FopImageException("Error while loading image "
165 + this.m_href.toString() + " : "
166 + e.getClass() + " - "
167 + e.getMessage());
168 }
169
170 for (int i = 0; i < this.m_height; i++) {
171 int x = 0;
172 int j = 0;
173 while (j < bytes) {
174 int p = temp[(this.m_height - i - 1) * bytes + j];
175
176 if (this.m_bitsPerPixel == 24 && x < this.m_width) {
177 int countr = 2;
178 do {
179 this.m_bitmaps[3 * (i * this.m_width + x) + countr] =
180 (byte)(temp[(this.m_height - i - 1) * bytes + j]
181 & 0xFF);
182 j++;
183 } while (--countr >= 0);
184 x++;
185 } else if (this.m_bitsPerPixel == 1) {
186 for (int countr = 0; countr < 8 && x < this.m_width;
187 countr++) {
188 if ((p & 0x80) != 0) {
189 this.m_bitmaps[3 * (i * this.m_width + x)] =
190 (byte)0xFF;
191 this.m_bitmaps[3 * (i * this.m_width + x) + 1] =
192 (byte)0xFF;
193 this.m_bitmaps[3 * (i * this.m_width + x) + 2] =
194 (byte)0xFF;
195 } else {
196 this.m_bitmaps[3 * (i * this.m_width + x)] =
197 (byte)0;
198 this.m_bitmaps[3 * (i * this.m_width + x) + 1] =
199 (byte)0;
200 this.m_bitmaps[3 * (i * this.m_width + x) + 2] =
201 (byte)0;
202 }
203 p <<= 1;
204 x++;
205 }
206 j++;
207 } else if (this.m_bitsPerPixel == 4) {
208 for (int countr = 0; countr < 2 && x < this.m_width;
209 countr++) {
210 int pal = ((p & 0xF0) >> 4) * 3;
211 this.m_bitmaps[3 * (i * this.m_width + x)] =
212 palette[pal];
213 this.m_bitmaps[3 * (i * this.m_width + x) + 1] =
214 palette[pal + 1];
215 this.m_bitmaps[3 * (i * this.m_width + x) + 2] =
216 palette[pal + 2];
217 p <<= 4;
218 x++;
219 }
220 j++;
221 } else if (this.m_bitsPerPixel == 8) {
222 if (x < this.m_width) {
223 p *= 3;
224 this.m_bitmaps[3 * (i * this.m_width + x)] =
225 palette[p];
226 this.m_bitmaps[3 * (i * this.m_width + x) + 1] =
227 palette[p + 1];
228 this.m_bitmaps[3 * (i * this.m_width + x) + 2] =
229 palette[p + 2];
230 j++;
231 x++;
232 } else
233 j = bytes;
234 } else
235 j++;
236 }
237 }
238
239 this.m_bitsPerPixel = 8;
243 }
244
245 }
246 |
Popular Tags |
Java API By Example, From Geeks To Geeks.