|
1 /* ***************************************************************** |
|
2 * BitMap.cc - Member functions for a BitMap * |
|
3 * because of the complexity of the many Bit functions, they are * |
|
4 * not all in this file. In this file are only the following * |
|
5 * functions: |
|
6 * |
|
7 * BitMap() - Constructor |
|
8 * ~BitMap() - Destructor |
|
9 * |
|
10 * int imageLength(); |
|
11 * int imageWidth(); |
|
12 * MapStatus & status; |
|
13 * MapStatus readMap(char * filename) ; |
|
14 * MapStatus writeMap(char * filename); |
|
15 * |
|
16 * // Data Access and low level manipulation functions |
|
17 * uchar * row(int i) - Returns a pointer to row i |
|
18 * MapStatus setBit(Point point, Color clr); |
|
19 * Color readBit(Point point); |
|
20 * |
|
21 * |
|
22 ***************************************************************/ |
|
23 |
|
24 #include "BitMap.h" |
|
25 #include <iostream.h> |
|
26 #include <stdio.h> |
|
27 #include "status_message.h" |
|
28 |
|
29 inline int set_pixel_value(uchar** new_data, int y, int x, int new_val) |
|
30 { |
|
31 new_data[y][x/8] |= (uchar)(new_val << (7-(x%8))); |
|
32 } |
|
33 |
|
34 inline int get_pixel_value(uchar** data, int y, int x) |
|
35 { |
|
36 if((data[y][x/8]) & (1 << (7 - (x%8)))) |
|
37 return 1; |
|
38 else |
|
39 return 0; |
|
40 } |
|
41 |
|
42 |
|
43 |
|
44 BitMap::BitMap() |
|
45 :fImageWidth(0), fImageLength(0), fStatus(EMPTY), fMapData(NULL) |
|
46 /*-------------------------------------------------------------- |
|
47 Primary Function: Constructor |
|
48 Return Value: pointer to new BitMap |
|
49 Effects: Initialize status to empty other values to zero |
|
50 Rev: 10/6/95 KM |
|
51 ---------------------------------------------------------------*/ |
|
52 { }; |
|
53 |
|
54 |
|
55 |
|
56 BitMap::~BitMap() |
|
57 /*-------------------------------------------------------------- |
|
58 Primary Purpose: destructor |
|
59 Effects: Deletes each row of BitPairs then the array of rows |
|
60 Rev: 10/6/95 KM |
|
61 ---------------------------------------------------------------*/ |
|
62 { |
|
63 if (fMapData != NULL) |
|
64 { |
|
65 int i; |
|
66 |
|
67 // delete each row |
|
68 for (i=0; i< fImageLength; i++) |
|
69 delete fMapData[i]; |
|
70 |
|
71 // delete array of rows |
|
72 delete fMapData; |
|
73 } |
|
74 }; |
|
75 |
|
76 int BitMap::readBit(Point p) |
|
77 {return get_pixel_value(fMapData,p.y(), p.x());} |
|
78 |
|
79 uchar * BitMap::row(int i) |
|
80 /*-------------------------------------------------------------- |
|
81 Primary Purpose: Access a row of the BitMap |
|
82 Arguments: i is the row to access |
|
83 Constraints: i < fImageLength |
|
84 Rev: KM 10/15 |
|
85 ---------------------------------------------------------------*/ |
|
86 { |
|
87 return fMapData[i]; |
|
88 |
|
89 }; |
|
90 |
|
91 |
|
92 |
|
93 MapStatus BitMap::readMap(char * filename) |
|
94 /*-------------------------------------------------------------- |
|
95 Primary Purpose: Read an BitMap from a TIFF file |
|
96 Arguments: filename of TIFF file |
|
97 Return Value: A MapStatus, either VALID or READERROR |
|
98 Effects: |
|
99 * BitMap::readMap(filename) will read a two level TIFF file |
|
100 * and place it in an BitMap. The private fields of the BitMap |
|
101 * set are: |
|
102 fImageWidth - the pixel width of the image |
|
103 fImageLength - the vertical pixel length of the image |
|
104 fstat - the status after the Read VALID, OTHERERROR,READERROR |
|
105 fMapData - an array of pointers to uchar arrays/ |
|
106 Constraints: filename must be a two level TIFF file |
|
107 Rev: 10/15/95 KM Portions Borrowed from Assignment 1 |
|
108 ---------------------------------------------------------------*/ |
|
109 { |
|
110 TIFF *tif; |
|
111 short photometric; |
|
112 |
|
113 // Open File - Read length and width |
|
114 |
|
115 tif = TIFFOpen (filename, "r"); |
|
116 if(tif == NULL) |
|
117 { fStatus= OPENERROR; |
|
118 return OPENERROR; |
|
119 } |
|
120 |
|
121 TIFFGetField (tif, TIFFTAG_IMAGELENGTH, &fImageLength); |
|
122 TIFFGetField (tif, TIFFTAG_IMAGEWIDTH, &fImageWidth); |
|
123 TIFFGetField (tif, TIFFTAG_PHOTOMETRIC, &photometric); |
|
124 |
|
125 |
|
126 fMapData = new (uchar *)[fImageLength]; |
|
127 |
|
128 printf("open succeeded on file %s. length = %d. width = %d\n", |
|
129 filename, fImageLength, fImageWidth); |
|
130 /* if(photometric == PHOTOMETRIC_MINISWHITE) |
|
131 printf("min-is-white format\n"); |
|
132 else if(photometric == PHOTOMETRIC_MINISBLACK ) |
|
133 printf("min-is-black format\n"); */ |
|
134 |
|
135 if((photometric != PHOTOMETRIC_MINISWHITE) && |
|
136 (photometric != PHOTOMETRIC_MINISBLACK)) |
|
137 printf("with an unknown(!) photometric: %d\n", photometric); |
|
138 |
|
139 // Calculate number of chars in a row |
|
140 int numChars = (fImageWidth / 8 ) +1 ; |
|
141 if(ENABLE_USER_INTERFACE) |
|
142 set_status("Reading %s...", filename); |
|
143 last_status = 0.0; |
|
144 |
|
145 for (int row = 0; row < fImageLength; ++row) |
|
146 { |
|
147 if(ENABLE_USER_INTERFACE) |
|
148 set_read_status(row, fImageLength); |
|
149 fMapData[row] = new uchar[numChars]; |
|
150 fMapData[row][numChars - 1] = 0; |
|
151 TIFFReadScanline(tif,fMapData[row],row,0); |
|
152 if(photometric != PHOTOMETRIC_MINISWHITE) |
|
153 invertBitsInBuffer(fMapData[row], numChars); |
|
154 // need to clear top and bottom row |
|
155 if(row == fImageLength-1 || row == 0) |
|
156 clearBitsInBuffer(fMapData[row], numChars); |
|
157 |
|
158 } |
|
159 last_status = 0.0; |
|
160 if(ENABLE_USER_INTERFACE) |
|
161 set_status("Done reading %s", filename); |
|
162 TIFFClose(tif); |
|
163 fStatus = VALID; |
|
164 return VALID; |
|
165 |
|
166 }; |
|
167 |
|
168 |
|
169 MapStatus BitMap::writeTclMap(char * filename, |
|
170 Point ul, Point lr, int scaledown) |
|
171 { |
|
172 FILE * outfile; |
|
173 int numChars= fImageWidth /8 + 1; |
|
174 outfile = fopen(filename, "w"); |
|
175 |
|
176 if(!outfile) |
|
177 cout << " Could not open " << filename << endl; |
|
178 |
|
179 fprintf(outfile, "%s_width %d\n",filename,fImageWidth); |
|
180 fprintf(outfile, "%s_height %d\n",filename,fImageLength); |
|
181 fprintf(outfile, "static char %s_bits[] {\n",filename); |
|
182 |
|
183 |
|
184 for (int r = 0; r < fImageLength; r++) |
|
185 { |
|
186 for(int col=0; col < numChars; col++) |
|
187 { |
|
188 fprintf(outfile, "%4#x,", fMapData[r][col]); |
|
189 |
|
190 if (!(r == fImageLength-1 && col == numChars-1)) |
|
191 fprintf(outfile, " ,"); |
|
192 |
|
193 if (((r*numChars + col) % 15)==0) |
|
194 fprintf(outfile,"\n"); |
|
195 } |
|
196 |
|
197 } |
|
198 fprintf(outfile,"}\n"); |
|
199 |
|
200 fclose(outfile); |
|
201 |
|
202 } |
|
203 |
|
204 |
|
205 |
|
206 short int BitMap::grayScale(Point ul, Point lr) |
|
207 // Dummy function for now |
|
208 { |
|
209 int numPixels = pixelsInRegion( ul, lr); |
|
210 int area = (lr.x() - ul.x()+1) * (lr.y() - ul.y()+1); |
|
211 if (area < numPixels) { |
|
212 printf("Uh oh! Area = %d and pixels = %d\n", area, numPixels); |
|
213 assert(area >= numPixels); |
|
214 } |
|
215 short int gscale =(short int)(((float)numPixels/area) * 255); |
|
216 |
|
217 return gscale; |
|
218 }; |
|
219 |
|
220 |
|
221 |
|
222 const int BitMap::pixelsInRegion (Point ul, Point lr) |
|
223 { |
|
224 assert (ul >= Point(0,0)); /* did someone overload these? */ |
|
225 if (!(lr <= Point(fImageWidth+8, fImageLength+8))) |
|
226 printf("problem\n"); |
|
227 // assert (lr <= Point(fImageWidth+8, fImageLength+8)); |
|
228 |
|
229 if(ul > lr)return 0; |
|
230 |
|
231 int ulx = ul.x(); int uly = ul.y(); |
|
232 int lrx = lr.x(); int lry = lr.y(); |
|
233 uchar * curRow; |
|
234 int pixCount = 0; |
|
235 |
|
236 |
|
237 for(int r = uly; r <= lry; r++) |
|
238 { |
|
239 curRow = row(r); |
|
240 // Count middle (whole) characters |
|
241 pixCount += pixelsBetween(curRow, ulx, lrx); |
|
242 // cout << pixelsBetween(curRow,ulx,lrx) <<" "; |
|
243 // cout << pixCount << endl; |
|
244 |
|
245 } |
|
246 return pixCount; |
|
247 }; |
|
248 |
|
249 |
|
250 int BitMap::minThickness(Point top, Point bottom) |
|
251 // returns the minimum number of pixels joined from top to bottom |
|
252 // requires that top.x == bottom.x |
|
253 { |
|
254 assert(top.x() = bottom.x()); |
|
255 Point p = top; |
|
256 int thickness = 0; |
|
257 int min = pixelsInRegion(top,bottom); |
|
258 for(p = top; p.y()<= bottom.y(); (p.y())++) |
|
259 { |
|
260 if(readBit(p)) |
|
261 thickness++; |
|
262 else if(thickness >0 && thickness < min) |
|
263 { |
|
264 min = thickness; |
|
265 thickness = 0; |
|
266 } |
|
267 } |
|
268 if( thickness > 0 && thickness < min) |
|
269 min = thickness; |
|
270 return min; |
|
271 |
|
272 } |
|
273 |
|
274 void testBitMap(char * filename) |
|
275 // Reads in BitMap and prints on screen |
|
276 { |
|
277 BitMap * m = new BitMap; |
|
278 |
|
279 m->readMap(filename); |
|
280 int numChars = (m->imageWidth() / 8 )+ 1; |
|
281 |
|
282 for (int r = 0; r < m->imageLength(); r++){ |
|
283 for (int c =0; c < numChars; c++) byteprint(m->row(r)[c]); |
|
284 printf( "\n"); |
|
285 } |
|
286 |
|
287 }; |
|
288 |
|
289 |
|
290 void byteprint(char d) // print bits in a byte, high bit on left |
|
291 { |
|
292 for (int i= 7; i>=0; --i) { |
|
293 if ((d>>i)&1) printf("X"); |
|
294 else printf(" "); |
|
295 } |
|
296 }; |
|
297 |
|
298 void bitprint(char d, int x) |
|
299 { |
|
300 if ((d>>(7-x))&1) cout << "X"; |
|
301 else cout << " "; |
|
302 }; |
|
303 |
|
304 |
|
305 class Page; |
|
306 |
|
307 void testPixelsInRegion(BitMap * bmap, RLEMap * rmap) |
|
308 // Reads in file and compares pixelsInRegion to RLEVersion |
|
309 { |
|
310 |
|
311 int bmapcnt, rmapcnt; |
|
312 |
|
313 cout << "Testing pixelsInRegion " << endl; |
|
314 |
|
315 bmapcnt = bmap->pixelsInRegion(Point(0,0), |
|
316 Point(bmap->imageWidth()-1, bmap->imageLength()-1)); |
|
317 |
|
318 rmapcnt = rmap->pixelsInRegion(Point(0,0), |
|
319 Point(rmap->imageWidth()-1, rmap->imageLength()-1)); |
|
320 |
|
321 cout << "For whole page:"; |
|
322 cout <<" Bitmap-" << bmapcnt << " RLEMap-" << rmapcnt << endl; |
|
323 |
|
324 cout << "Start on char edge end on edge (8,8) (16,21) "; |
|
325 bmapcnt = bmap->pixelsInRegion(Point(8,8), Point(16,21)); |
|
326 rmapcnt = rmap->pixelsInRegion(Point(8,8), Point(16,21)); |
|
327 cout <<" Bitmap-" << bmapcnt << " RLEMap-" << rmapcnt << endl; |
|
328 |
|
329 cout << "Start on char edge, end mid char (0,8) (50,21)"; |
|
330 bmapcnt = bmap->pixelsInRegion(Point(0,8), Point(50,21)); |
|
331 rmapcnt = rmap->pixelsInRegion(Point(0,8), Point(50,21)); |
|
332 cout <<" Bitmap-" << bmapcnt << " RLEMap-" << rmapcnt << endl; |
|
333 |
|
334 cout << "Start mid char, end on edge (2,8) (7,21)"; |
|
335 bmapcnt = bmap->pixelsInRegion(Point(2,8), Point(7,21)); |
|
336 rmapcnt = rmap->pixelsInRegion(Point(2,8), Point(7,21)); |
|
337 cout <<" Bitmap-" << bmapcnt << " RLEMap-" << rmapcnt << endl; |
|
338 |
|
339 cout << "Start mid char, end mid char (2,8) (9,21)"; |
|
340 bmapcnt = bmap->pixelsInRegion(Point(2,8), Point(9,21)); |
|
341 rmapcnt = rmap->pixelsInRegion(Point(2,8), Point(9,21)); |
|
342 cout <<" Bitmap-" << bmapcnt << " RLEMap-" << rmapcnt << endl; |
|
343 |
|
344 cout << "Start and, end same char (2,8) (4,21)"; |
|
345 bmapcnt = bmap->pixelsInRegion(Point(2,4), Point(4,21)); |
|
346 rmapcnt = rmap->pixelsInRegion(Point(2,4), Point(4,21)); |
|
347 cout <<" Bitmap-" << bmapcnt << " RLEMap-" << rmapcnt << endl; |
|
348 |
|
349 }; |
|
350 |
|
351 MapStatus BitMap::rotateMap(Angle angle) |
|
352 /* |
|
353 Thanks to Clint Staley and S. Jacques @calpoly |
|
354 for this bitmap rotation alg. |
|
355 |
|
356 copied and slightly modified since it wass a pain getting |
|
357 the RLE rotate to work and I think this might be decently |
|
358 fast -AR |
|
359 */ |
|
360 { |
|
361 int nx,ny,newheight,newwidth,oldheight,oldwidth,i,j,halfnewheight,halfnewwidth; |
|
362 int halfoldheight,halfoldwidth; |
|
363 double radians; |
|
364 double cosval,sinval; |
|
365 uchar** newMapData; |
|
366 |
|
367 fprintf(stderr,"Rotating Image %lf Degrees\n",angle); |
|
368 radians = -(angle) / ((180 / 3.142)); |
|
369 cosval = cos(radians); |
|
370 sinval = sin(radians); |
|
371 |
|
372 oldheight = fImageLength; |
|
373 oldwidth = fImageWidth; |
|
374 |
|
375 newwidth = (int)abs((int)(oldwidth*cosval)) + (int)abs((int)(oldheight*sinval)); |
|
376 newheight = (int)abs((int)(-oldwidth*sinval)) + (int)abs((int)(oldheight*cosval)); |
|
377 |
|
378 halfnewheight = newheight / 2; |
|
379 halfnewwidth = newwidth / 2; |
|
380 halfoldwidth = oldwidth /2; |
|
381 halfoldheight = oldheight /2 ; |
|
382 |
|
383 newMapData = new (uchar*) [newheight]; |
|
384 |
|
385 int num_chars = (newwidth / 8) + 1; |
|
386 |
|
387 for (int row = 0; row < newheight; ++row) |
|
388 { |
|
389 newMapData[row] = new uchar[num_chars]; |
|
390 for (int k = 0; k < num_chars; k++) |
|
391 newMapData[row][k] = '\0'; |
|
392 } |
|
393 |
|
394 last_status = 0.0; |
|
395 for(i=0;i < newheight;i++) |
|
396 { |
|
397 if(ENABLE_USER_INTERFACE) |
|
398 set_rotation_status((int)i, (int)newheight); |
|
399 for(j=0;j < newwidth;j++) |
|
400 { |
|
401 |
|
402 /* set_pixel_value(newMapData, i, j, 0); |
|
403 break; */ |
|
404 |
|
405 nx =(int)( (j - halfnewwidth)*cosval + (i-halfnewheight)*sinval); |
|
406 ny =(int)( -((j - halfnewwidth)*sinval) + (i - halfnewheight)*cosval); |
|
407 nx = nx + halfoldwidth; |
|
408 ny = ny + halfoldheight; |
|
409 if ((nx < oldwidth) && (ny < oldheight) && (nx > 0) && (ny > 0)) |
|
410 { |
|
411 if(get_pixel_value(fMapData, ny, nx)) |
|
412 set_pixel_value(newMapData, i, j, 1); |
|
413 else |
|
414 set_pixel_value(newMapData, i, j, 0); |
|
415 } |
|
416 else |
|
417 { |
|
418 set_pixel_value(newMapData, i, j, 0); |
|
419 } |
|
420 } |
|
421 } |
|
422 if(ENABLE_USER_INTERFACE) |
|
423 set_status("Rotating Image: Done"); |
|
424 last_status = 0.0; |
|
425 |
|
426 /* free up the old storage */ |
|
427 for(i = 0; i < fImageLength; i++) |
|
428 { |
|
429 free(fMapData[i]); |
|
430 } |
|
431 free(fMapData); |
|
432 |
|
433 /* assign pointer, etc to the new stuff */ |
|
434 fMapData = newMapData; |
|
435 fImageLength = newheight; |
|
436 fImageWidth = newwidth; |
|
437 } |
|
438 |
|
439 /* |
|
440 |
|
441 int set_pixel_value(uchar** new_data, int y, int x, int new_val) |
|
442 { |
|
443 new_data[y][x/8] |= (uchar)(new_val << (7-(x%8))); |
|
444 } |
|
445 |
|
446 int get_pixel_value(uchar** data, int y, int x) |
|
447 { |
|
448 if((data[y][x/8]) & (1 << (7 - (x%8)))) |
|
449 return 1; |
|
450 else |
|
451 return 0; |
|
452 } |
|
453 |
|
454 */ |
|
455 |
|
456 |
|
457 |
|
458 |
|
459 |
|
460 |
|
461 |
|
462 |
|
463 |