1 public class ImageReader {
9 public static Image getImage() {
10 System.out.println(idx);
11 Image image = ImageReader.readImage("data/b" + idx + ".bmp");
19 public static Image readImage(String file) {
21 FileInputStream fs = new FileInputStream(file);
22 int bflen = 14; // 14 byte BITMAPFILEHEADER
23 byte bf[] = new byte[bflen];
24 // fs.read(bf,0,bflen);
26 int bilen = 40; // 40-byte BITMAPINFOHEADER
27 byte bi[] = new byte[bilen];
28 // fs.read(bi,0,bilen);
32 (((int) bf[5] & 0xff) << 24) | (((int) bf[4] & 0xff) << 16) | (((int) bf[3] & 0xff) << 8)
34 // System.out.println("File type is :" + (char) bf[0] + (char) bf[1]);
35 // System.out.println("Size of file is :" + nsize);
37 (((int) bi[3] & 0xff) << 24) | (((int) bi[2] & 0xff) << 16) | (((int) bi[1] & 0xff) << 8)
39 // System.out.println("Size of bitmapinfoheader is :" + nbisize);
41 (((int) bi[7] & 0xff) << 24) | (((int) bi[6] & 0xff) << 16) | (((int) bi[5] & 0xff) << 8)
43 // System.out.println("Width is :" + nwidth);
45 (((int) bi[11] & 0xff) << 24) | (((int) bi[10] & 0xff) << 16) | (((int) bi[9] & 0xff) << 8)
47 // System.out.println("Height is :" + nheight);
48 int nplanes = (((int) bi[13] & 0xff) << 8) | (int) bi[12] & 0xff;
49 // System.out.println("Planes is :" + nplanes);
50 int nbitcount = (((int) bi[15] & 0xff) << 8) | (int) bi[14] & 0xff;
51 // System.out.println("BitCount is :" + nbitcount);
52 // Look for non-zero values to indicate compression
54 (((int) bi[19]) << 24) | (((int) bi[18]) << 16) | (((int) bi[17]) << 8) | (int) bi[16];
55 // System.out.println("Compression is :" + ncompression);
57 (((int) bi[23] & 0xff) << 24) | (((int) bi[22] & 0xff) << 16)
58 | (((int) bi[21] & 0xff) << 8) | (int) bi[20] & 0xff;
59 // System.out.println("SizeImage is :" + nsizeimage);
62 (((int) bi[27] & 0xff) << 24) | (((int) bi[26] & 0xff) << 16)
63 | (((int) bi[25] & 0xff) << 8) | (int) bi[24] & 0xff;
64 // System.out.println("X-Pixels per meter is :" + nxpm);
66 (((int) bi[31] & 0xff) << 24) | (((int) bi[30] & 0xff) << 16)
67 | (((int) bi[29] & 0xff) << 8) | (int) bi[28] & 0xff;
68 // System.out.println("Y-Pixels per meter is :" + nypm);
70 (((int) bi[35] & 0xff) << 24) | (((int) bi[34] & 0xff) << 16)
71 | (((int) bi[33] & 0xff) << 8) | (int) bi[32] & 0xff;
72 // System.out.println("Colors used are :" + nclrused);
74 (((int) bi[39] & 0xff) << 24) | (((int) bi[38] & 0xff) << 16)
75 | (((int) bi[37] & 0xff) << 8) | (int) bi[36] & 0xff;
76 // System.out.println("Colors important are :" + nclrimp);
78 Image image = new Image(nwidth, nheight);
80 if (nbitcount == 24) {
81 // No Palatte data for 24-bit format but scan lines are
82 // padded out to even 4-byte boundaries.
83 int npad = (nsizeimage / nheight) - nwidth * 3;
84 // ndata = new int[(nheight * nwidth) + 4];
85 byte brgb[] = new byte[(nwidth + npad) * 3 * nheight];
86 // fs.read (brgb, 0, (nwidth + npad) * 3 * nheight);
90 for (int j = 0; j < nheight; j++) {
91 for (int i = 0; i < nwidth; i++) {
92 // ndata[nwidth * (nheight - j - 1) + i] =
93 // (255 & 0xff) << 24 | (((int) brgb[nindex + 2] & 0xff) << 16)
94 // | (((int) brgb[nindex + 1] & 0xff) << 8) | (int) brgb[nindex] &
97 ((3 * ((int) (brgb[nindex + 2]) & 0xff) + 6 * ((int) brgb[nindex + 1] & 0xff) + ((int) brgb[nindex] & 0xff))) / 10;
99 // ndata[nwidth * (nheight - j - 1) + i + 4] = ta;
100 yPos = nheight - j - 1;
101 // System.out.println("yPos=" + yPos + " nheight=" + nheight + " j=" +
103 // System.out.println("Encoded Color at (" + i + "," + yPos + ")is:" +
104 // brgb + " (R,G,B)= ("
105 // + ((int) (brgb[nindex + 2]) & 0xff) + "," + ((int) brgb[nindex + 1]
107 // + ((int) brgb[nindex] & 0xff) + ")" + "cufoff=" + ta);
108 image.setPixel(i, yPos, ((int) brgb[nindex + 2] & 0xff), ((int) brgb[nindex + 1] & 0xff),
109 ((int) brgb[nindex] & 0xff));
114 // image = createImage
115 // ( new MemoryImageSource (nwidth, nheight,
116 // ndata, 0, nwidth));
118 } else if (nbitcount == 8) {
119 // Have to determine the number of colors, the clrsused
120 // parameter is dominant if it is greater than zero. If
121 // zero, calculate colors based on bitsperpixel.
124 nNumColors = nclrused;
126 nNumColors = (1 & 0xff) << nbitcount;
128 System.out.println("The number of Colors is" + nNumColors);
129 // Some bitmaps do not have the sizeimage field calculated
130 // Ferret out these cases and fix 'em.
131 if (nsizeimage == 0) {
132 nsizeimage = ((((nwidth * nbitcount) + 31) & 31) >> 3);
133 nsizeimage *= nheight;
134 System.out.println("nsizeimage (backup) is" + nsizeimage);
136 // Read the palatte colors.
137 int npalette[] = new int[nNumColors];
138 byte bpalette[] = new byte[nNumColors * 4];
139 // fs.read (bpalette, 0, nNumColors*4);
142 for (int n = 0; n < nNumColors; n++) {
144 (255 & 0xff) << 24 | (((int) bpalette[nindex8 + 2] & 0xff) << 16)
145 | (((int) bpalette[nindex8 + 1] & 0xff) << 8) | (int) bpalette[nindex8] & 0xff;
146 // System.out.println ("Palette Color "+n
147 // +" is:"+npalette[n]+" (res,R,G,B)= (" +((int)(bpalette[nindex8+3]) &
148 // 0xff)+"," +((int)(bpalette[nindex8+2]) & 0xff)+","
149 // +((int)bpalette[nindex8+1]&0xff)+","
150 // +((int)bpalette[nindex8]&0xff)+")");
154 // Read the image data (actually indices into the palette)
155 // Scan lines are still padded out to even 4-byte
157 int npad8 = (nsizeimage / nheight) - nwidth;
158 // System.out.println("nPad is:" + npad8);
159 // int ndata8[] = new int[nwidth * nheight];
160 // ndata = new int[(nwidth * nheight) + 4];
161 byte bdata[] = new byte[(nwidth + npad8) * nheight];
162 // fs.read (bdata, 0, (nwidth+npad8)*nheight);
165 for (int j8 = 0; j8 < nheight; j8++) {
166 for (int i8 = 0; i8 < nwidth; i8++) {
167 // ndata[nwidth * (nheight - j8 - 1) + i8 + 4] = npalette[((int)
168 // bdata[nindex8] & 0xff)];
169 image.setPixel(i8, j8, npalette[((int) bdata[nindex8] & 0xff)]);
170 // System.out.println("Encoded Color at (" + i8 + "," + j8 + ")is: "
171 // + ndata[nwidth * (nheight - j8 - 1) + i8 + 4]);
176 // image = createImage ( new MemoryImageSource (nwidth, nheight,
177 // ndata8, 0, nwidth));
179 System.out.println("Not a 24-bit or 8-bit Windows Bitmap, aborting...");
180 // image = (Image)null;
184 // ndata[0] = nheight;
185 // ndata[1] = nwidth;
186 // ndata[2] = nheight * nwidth;