| 1 |
/* |
| 2 |
* abitmap.h |
| 3 |
* panlib |
| 4 |
* |
| 5 |
* General bitmap class (mostly inline) |
| 6 |
* |
| 7 |
* Created by gward on Tue May 15 2001. |
| 8 |
* Copyright (c) 2001 Anyhere Software. All rights reserved. |
| 9 |
* |
| 10 |
*/ |
| 11 |
#ifndef _ABITMAP_H_ |
| 12 |
#define _ABITMAP_H_ |
| 13 |
|
| 14 |
#ifndef _TIFF_ |
| 15 |
#include "tiff.h" /* needed for uint32 type */ |
| 16 |
#endif |
| 17 |
|
| 18 |
#define ABMend 0xffffffff // terminal return |
| 19 |
|
| 20 |
// Inline bitmap class |
| 21 |
class ABitMap { |
| 22 |
private: |
| 23 |
uint32 * bmap; // bitmap storage |
| 24 |
uint32 len; // bitmap size |
| 25 |
public: |
| 26 |
ABitMap() { len=0; bmap=0; } |
| 27 |
ABitMap(uint32 n, bool clrset=false) { |
| 28 |
bmap=0; len=0; NewBitMap(n,clrset); |
| 29 |
} |
| 30 |
ABitMap(const ABitMap &orig) { |
| 31 |
bmap=0; len=0; *this=orig; |
| 32 |
} |
| 33 |
~ABitMap() { |
| 34 |
delete [] bmap; |
| 35 |
} |
| 36 |
// Access to raw word data |
| 37 |
uint32 * base() { |
| 38 |
return bmap; |
| 39 |
} |
| 40 |
// Read-only word access |
| 41 |
const uint32 * base() const { |
| 42 |
return bmap; |
| 43 |
} |
| 44 |
// Number of words from #bits |
| 45 |
static int32 bmlen(uint32 nbits) { |
| 46 |
return (nbits+0x1f)>>5; |
| 47 |
} |
| 48 |
// Total number of words |
| 49 |
int32 bmlen() const { |
| 50 |
return bmlen(len); |
| 51 |
} |
| 52 |
// Reallocate and clear bitmap |
| 53 |
bool NewBitMap(uint32 n, bool clrset=false); |
| 54 |
// Clear bitmap to all 0's or 1's |
| 55 |
void ClearBitMap(bool clrset=false); |
| 56 |
// Steal another bitmap's contents |
| 57 |
bool Take(ABitMap *srcp) { |
| 58 |
if (srcp == this) return false; |
| 59 |
delete [] bmap; bmap=0; len=0; |
| 60 |
if (!srcp) return false; |
| 61 |
bmap=srcp->bmap; len=srcp->len; |
| 62 |
srcp->bmap=0; srcp->len=0; |
| 63 |
return len; |
| 64 |
} |
| 65 |
// Return number of bits in bitmap |
| 66 |
uint32 Length() const { |
| 67 |
return len; |
| 68 |
} |
| 69 |
// Get original length if RLE (or 0) |
| 70 |
uint32 RLength() const; |
| 71 |
// Compress into a run-length encoded bitmap |
| 72 |
bool GetRLE(ABitMap *rlep) const; |
| 73 |
// Reconstitute bits from RLE encoding |
| 74 |
bool SetFromRLE(const ABitMap &rle); |
| 75 |
// Extract bitmap section (true if some overlap) |
| 76 |
bool GetBits(ABitMap *dp, uint32 i) const; |
| 77 |
// Extract bitmap section (fill if past end) |
| 78 |
ABitMap GetBits(uint32 i, uint32 n, bool fill=false) const { |
| 79 |
ABitMap bm(n, fill); |
| 80 |
GetBits(&bm, i); |
| 81 |
return bm; |
| 82 |
} |
| 83 |
// Overlay bitmap section (ignores bits past end) |
| 84 |
bool AssignBits(uint32 i, const ABitMap &src); |
| 85 |
// Apply operation to bitmap section |
| 86 |
bool OpBits(uint32 i, char op, const ABitMap &src); |
| 87 |
// Clear bitmap section |
| 88 |
void ClearBits(uint32 i, uint32 n, bool clrset=false); |
| 89 |
// Clear bits set in second bitmap |
| 90 |
bool ClearBitsFrom(const ABitMap &src); |
| 91 |
// Count number of bits set in bitmap |
| 92 |
uint32 SumTotal(bool bit2cnt = true) const; |
| 93 |
// Return the next bit position matching val (or ABMend) |
| 94 |
uint32 Find(uint32 i = 0, bool val = true) const; |
| 95 |
uint32 Find(int i, bool val = true) const { |
| 96 |
return Find((uint32)i, val); |
| 97 |
} |
| 98 |
uint32 Find(long i, bool val = true) const { |
| 99 |
return Find((uint32)i, val); |
| 100 |
} |
| 101 |
// Different interface to find the next bit matching val |
| 102 |
bool Find(uint32 *ip, bool val = true) const { |
| 103 |
if (!ip) return false; |
| 104 |
if (*ip >= len) return false; |
| 105 |
*ip = Find(*ip, val); |
| 106 |
return (*ip < len); |
| 107 |
} |
| 108 |
// Access word for i'th bit |
| 109 |
uint32 & Word(uint32 i) { |
| 110 |
static uint32 dummy; |
| 111 |
if (i >= len) return dummy; |
| 112 |
return bmap[i>>5]; |
| 113 |
} |
| 114 |
// Get word value for i'th bit (0 if out of range) |
| 115 |
uint32 WordV(uint32 i) const { |
| 116 |
if (i >= len) return 0; |
| 117 |
return bmap[i>>5]; |
| 118 |
} |
| 119 |
// Index corresponding bit in word |
| 120 |
static uint32 Bit(uint32 i) { |
| 121 |
return 1 << (i & 0x1f); |
| 122 |
} |
| 123 |
// Return value of i'th bit in bitmap |
| 124 |
bool Check(uint32 i) const { |
| 125 |
return (WordV(i) & Bit(i)); |
| 126 |
} |
| 127 |
// Set i'th bit |
| 128 |
void Set(uint32 i) { |
| 129 |
Word(i) |= Bit(i); |
| 130 |
} |
| 131 |
// Reset i'th bit |
| 132 |
void Reset(uint32 i) { |
| 133 |
Word(i) &= ~Bit(i); |
| 134 |
} |
| 135 |
// Set i'th bit explicitly on or off |
| 136 |
void Set(uint32 i, bool switchon) { |
| 137 |
uint32 b = Bit(i); |
| 138 |
uint32 & w = Word(i); |
| 139 |
if (switchon) w |= b; |
| 140 |
else w &= ~b; |
| 141 |
} |
| 142 |
// Toggle i'th bit |
| 143 |
void Toggle(uint32 i) { |
| 144 |
Word(i) ^= Bit(i); |
| 145 |
} |
| 146 |
// Set i'th bit if it's clear (or fail) |
| 147 |
bool TestAndSet(uint32 i) { |
| 148 |
if (i >= len) return false; |
| 149 |
uint32 b = Bit(i); |
| 150 |
uint32 & w = Word(i); |
| 151 |
uint32 wasset = w & b; |
| 152 |
w |= b; |
| 153 |
return !wasset; |
| 154 |
} |
| 155 |
// Clear i'th bit if it's set (or fail) |
| 156 |
bool TestAndReset(uint32 i) { |
| 157 |
if (i >= len) return false; |
| 158 |
uint32 b = Bit(i); |
| 159 |
uint32 & w = Word(i); |
| 160 |
uint32 wasset = w & b; |
| 161 |
w &= ~b; |
| 162 |
return wasset; |
| 163 |
} |
| 164 |
// Set i'th bit on/off (fail if no change) |
| 165 |
bool TestAndSet(uint32 i, bool switchon) { |
| 166 |
return switchon ? TestAndSet(i) : TestAndReset(i); |
| 167 |
} |
| 168 |
// Invert the entire bitmap |
| 169 |
void Invert(); |
| 170 |
// Downward shift operator, zero fill |
| 171 |
ABitMap & operator>>=(uint32 nbits); |
| 172 |
// Upward shift operator, zero fill |
| 173 |
ABitMap & operator<<=(uint32 nbits); |
| 174 |
// Copy operator |
| 175 |
ABitMap & operator=(const ABitMap &src); |
| 176 |
// Bitwise OR-copy operator |
| 177 |
ABitMap & operator|=(const ABitMap &src); |
| 178 |
// Bitwise AND-assign operator |
| 179 |
ABitMap & operator&=(const ABitMap &src); |
| 180 |
// Bitwise XOR-assign operator |
| 181 |
ABitMap & operator^=(const ABitMap &src); |
| 182 |
// Subtraction operator, synonym for ClearBitsFrom() |
| 183 |
ABitMap & operator-=(const ABitMap &src) { |
| 184 |
ClearBitsFrom(src); |
| 185 |
return *this; |
| 186 |
} |
| 187 |
// Compare two bitmaps for equality |
| 188 |
bool operator==(const ABitMap &that) const; |
| 189 |
}; |
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|
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inline bool |
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operator!=(const ABitMap &bm1, const ABitMap &bm2) |
| 193 |
{ |
| 194 |
return !(bm1 == bm2); |
| 195 |
} |
| 196 |
|
| 197 |
inline ABitMap |
| 198 |
operator>>(ABitMap bmLeft, uint32 nbr) |
| 199 |
{ |
| 200 |
return bmLeft >>= nbr; |
| 201 |
} |
| 202 |
|
| 203 |
inline ABitMap |
| 204 |
operator<<(ABitMap bmLeft, uint32 nbl) |
| 205 |
{ |
| 206 |
return bmLeft <<= nbl; |
| 207 |
} |
| 208 |
|
| 209 |
inline ABitMap |
| 210 |
operator|(ABitMap bmLeft, const ABitMap &bmRight) |
| 211 |
{ |
| 212 |
return bmLeft |= bmRight; |
| 213 |
} |
| 214 |
|
| 215 |
inline ABitMap |
| 216 |
operator&(ABitMap bmLeft, const ABitMap &bmRight) |
| 217 |
{ |
| 218 |
return bmLeft &= bmRight; |
| 219 |
} |
| 220 |
|
| 221 |
inline ABitMap |
| 222 |
operator^(ABitMap bmLeft, const ABitMap &bmRight) |
| 223 |
{ |
| 224 |
return bmLeft ^= bmRight; |
| 225 |
} |
| 226 |
|
| 227 |
inline ABitMap |
| 228 |
operator-(ABitMap bmLeft, const ABitMap &bmRight) |
| 229 |
{ |
| 230 |
return bmLeft -= bmRight; |
| 231 |
} |
| 232 |
|
| 233 |
inline ABitMap |
| 234 |
operator~(ABitMap bmUnary) |
| 235 |
{ |
| 236 |
bmUnary.Invert(); |
| 237 |
return bmUnary; |
| 238 |
} |
| 239 |
|
| 240 |
// 2-dimensional bitmap class |
| 241 |
class ABitMap2 : protected ABitMap { |
| 242 |
private: |
| 243 |
int width, height; // bitmap dimensions |
| 244 |
protected: |
| 245 |
uint32 bmi(int x, int y) const { |
| 246 |
if (OffBitMap(x, y)) return ABMend; |
| 247 |
return (uint32)y*width + x; |
| 248 |
} |
| 249 |
public: |
| 250 |
ABitMap2() { width=height=0; } |
| 251 |
ABitMap2(int w, int h, bool clrset=false) : |
| 252 |
ABitMap((w>0)&(h>0)&&(w <= ABMend/h) |
| 253 |
? (uint32)w*h : (uint32)0, clrset) { |
| 254 |
if (Length()) { |
| 255 |
width=w; height=h; |
| 256 |
} else { width=height=0; } |
| 257 |
} |
| 258 |
ABitMap2(const ABitMap2 &orig) { |
| 259 |
*this=orig; |
| 260 |
} |
| 261 |
// Access to raw word data |
| 262 |
uint32 * base() { |
| 263 |
return ABitMap::base(); |
| 264 |
} |
| 265 |
// Read-only word access |
| 266 |
const uint32 * base() const { |
| 267 |
return ABitMap::base(); |
| 268 |
} |
| 269 |
// Total number of words |
| 270 |
int32 bmlen() const { |
| 271 |
return ABitMap::bmlen(); |
| 272 |
} |
| 273 |
// Return bitmap width |
| 274 |
int Width() const { |
| 275 |
return width; |
| 276 |
} |
| 277 |
// Return bitmap height |
| 278 |
int Height() const { |
| 279 |
return height; |
| 280 |
} |
| 281 |
// Is the indicated bit off our bitmap? |
| 282 |
bool OffBitMap(int x, int y) const { |
| 283 |
return ((x < 0) | (x >= width) | |
| 284 |
(y < 0) | (y >= height)); |
| 285 |
} |
| 286 |
// Count number of bits set in bitmap |
| 287 |
uint32 SumTotal(bool bit2cnt = true) const { |
| 288 |
return ABitMap::SumTotal(bit2cnt); |
| 289 |
} |
| 290 |
// Reallocate and clear bitmap |
| 291 |
bool NewBitMap(int w, int h, bool clrset=false) { |
| 292 |
if ((w <= 0) | (h <= 0) || w > ABMend/h) |
| 293 |
w = h = 0; |
| 294 |
width=w; height=h; |
| 295 |
return ABitMap::NewBitMap((uint32)w*h, clrset); |
| 296 |
} |
| 297 |
// Clear bitmap to all 0's or 1's |
| 298 |
void ClearBitMap(bool clrset=false) { |
| 299 |
ABitMap::ClearBitMap(clrset); |
| 300 |
} |
| 301 |
// Compress with run-length encoding into a 1-D bitmap |
| 302 |
bool GetRLE(ABitMap *rlep) const { |
| 303 |
return ABitMap::GetRLE(rlep); |
| 304 |
} |
| 305 |
// Reconstitute bits from RLE encoding (size must match) |
| 306 |
bool SetFromRLE(int w, int h, const ABitMap &rle); |
| 307 |
// Steal another bitmap's contents |
| 308 |
bool Take(ABitMap2 *srcp) { |
| 309 |
if (srcp == this) return false; |
| 310 |
width=height=0; |
| 311 |
if (!ABitMap::Take(srcp)) return false; |
| 312 |
width=srcp->width; height=srcp->height; |
| 313 |
srcp->width=srcp->height=0; |
| 314 |
return true; |
| 315 |
} |
| 316 |
// Extract bitmap section (true if some overlap) |
| 317 |
bool GetRect(ABitMap2 *dp, int sx, int sy) const; |
| 318 |
// Extract bitmap section (fill outside overlap) |
| 319 |
ABitMap2 GetRect(int sx, int sy, int w, int h, bool fill=false) const { |
| 320 |
ABitMap2 bm2(w, h, fill); |
| 321 |
GetRect(&bm2, sx, sy); |
| 322 |
return bm2; |
| 323 |
} |
| 324 |
// Assign bitmap section (ignores anything past edges) |
| 325 |
bool AssignRect(int dx, int dy, const ABitMap2 &src); |
| 326 |
// Apply operation to bitmap section |
| 327 |
bool OpRect(int dx, int dy, char op, const ABitMap2 &src); |
| 328 |
// Clear a rectangle |
| 329 |
void ClearRect(int x, int y, int w, int h, bool clrset=false); |
| 330 |
// Find the next bit matching val (scanline order) |
| 331 |
bool Find(int *xp, int *yp, bool val=true) const { |
| 332 |
if (!xp | !yp) return false; |
| 333 |
if (width <= 0) return false; |
| 334 |
if ((*xp < 0) | (*yp < 0)) *xp = *yp = 0; |
| 335 |
else if (*xp >= width) { *xp=0; ++(*yp); } |
| 336 |
uint32 i = ABitMap::Find(bmi(*xp,*yp), val); |
| 337 |
if (i == ABMend) { *yp = height; return false; } |
| 338 |
*yp = int(i / width); |
| 339 |
*xp = int(i - *yp*width); |
| 340 |
return true; |
| 341 |
} |
| 342 |
// Get bounds of assigned region |
| 343 |
bool GetBoundRect(int xymin[2], int wh[2], bool val=true) const; |
| 344 |
// Return value of bit in bitmap |
| 345 |
bool Check(int x, int y) const { |
| 346 |
return ABitMap::Check(bmi(x,y)); |
| 347 |
} |
| 348 |
// Set bit |
| 349 |
void Set(int x, int y) { |
| 350 |
ABitMap::Set(bmi(x,y)); |
| 351 |
} |
| 352 |
// Reset bit |
| 353 |
void Reset(int x, int y) { |
| 354 |
ABitMap::Reset(bmi(x,y)); |
| 355 |
} |
| 356 |
// Set bit explicitly on or off |
| 357 |
void Set(int x, int y, bool switchon) { |
| 358 |
ABitMap::Set(bmi(x,y), switchon); |
| 359 |
} |
| 360 |
// Toggle bit |
| 361 |
void Toggle(int x, int y) { |
| 362 |
ABitMap::Toggle(bmi(x,y)); |
| 363 |
} |
| 364 |
// Set bit if it's clear (or fail) |
| 365 |
bool TestAndSet(int x, int y) { |
| 366 |
return ABitMap::TestAndSet(bmi(x,y)); |
| 367 |
} |
| 368 |
// Clear bit if it's set (or fail) |
| 369 |
bool TestAndReset(int x, int y) { |
| 370 |
return ABitMap::TestAndReset(bmi(x,y)); |
| 371 |
} |
| 372 |
// Set bit on/off (fail if no change) |
| 373 |
bool TestAndSet(int x, int y, bool switchon) { |
| 374 |
return ABitMap::TestAndSet(bmi(x,y), switchon); |
| 375 |
} |
| 376 |
// Invert the entire bitmap |
| 377 |
void Invert() { |
| 378 |
ABitMap::Invert(); |
| 379 |
} |
| 380 |
// Shift bitmap, filling uncovered area as indicated |
| 381 |
void Shift(int dx, int dy, int fill=0); |
| 382 |
// Dilate (or erode) selection by given radius |
| 383 |
void Expand(double rad, bool val=true); |
| 384 |
// Clear bits set in second map |
| 385 |
bool ClearBitsFrom(const ABitMap2 &src) { |
| 386 |
if (width != src.width) |
| 387 |
return false; |
| 388 |
return ABitMap::ClearBitsFrom(src); |
| 389 |
} |
| 390 |
// Copy operator |
| 391 |
ABitMap2 & operator=(const ABitMap2 &src) { |
| 392 |
ABitMap::operator=(src); |
| 393 |
width=src.width; height=src.height; |
| 394 |
return *this; |
| 395 |
} |
| 396 |
// Bitwise OR-copy operator |
| 397 |
ABitMap2 & operator|=(const ABitMap2 &src) { |
| 398 |
ABitMap::operator|=(src); |
| 399 |
width=src.width; height=src.height; |
| 400 |
return *this; |
| 401 |
} |
| 402 |
// Bitwise AND-assign operator |
| 403 |
ABitMap2 & operator&=(const ABitMap2 &src) { |
| 404 |
if ((width!=src.width)|(height!=src.height)) |
| 405 |
return *this; |
| 406 |
ABitMap::operator&=(src); |
| 407 |
return *this; |
| 408 |
} |
| 409 |
// Bitwise XOR-assign operator |
| 410 |
ABitMap2 & operator^=(const ABitMap2 &src) { |
| 411 |
if ((width!=src.width)|(height!=src.height)) |
| 412 |
return *this; |
| 413 |
ABitMap::operator^=(src); |
| 414 |
return *this; |
| 415 |
} |
| 416 |
// Subtraction operator, synonym for ClearBitsFrom() |
| 417 |
ABitMap2 & operator-=(const ABitMap2 &src) { |
| 418 |
ClearBitsFrom(src); |
| 419 |
return *this; |
| 420 |
} |
| 421 |
// Compare two bitmaps for equality |
| 422 |
bool operator==(const ABitMap2 &that) const { |
| 423 |
if (width != that.width) |
| 424 |
return false; |
| 425 |
return ABitMap::operator==(that); |
| 426 |
} |
| 427 |
}; |
| 428 |
|
| 429 |
inline bool |
| 430 |
operator!=(const ABitMap2 &bm1, const ABitMap2 &bm2) |
| 431 |
{ |
| 432 |
return !(bm1 == bm2); |
| 433 |
} |
| 434 |
|
| 435 |
inline ABitMap2 |
| 436 |
operator|(ABitMap2 bmLeft, const ABitMap2 &bmRight) |
| 437 |
{ |
| 438 |
return bmLeft |= bmRight; |
| 439 |
} |
| 440 |
|
| 441 |
inline ABitMap2 |
| 442 |
operator&(ABitMap2 bmLeft, const ABitMap2 &bmRight) |
| 443 |
{ |
| 444 |
return bmLeft &= bmRight; |
| 445 |
} |
| 446 |
|
| 447 |
inline ABitMap2 |
| 448 |
operator^(ABitMap2 bmLeft, const ABitMap2 &bmRight) |
| 449 |
{ |
| 450 |
return bmLeft ^= bmRight; |
| 451 |
} |
| 452 |
|
| 453 |
inline ABitMap2 |
| 454 |
operator-(ABitMap2 bmLeft, const ABitMap2 &bmRight) |
| 455 |
{ |
| 456 |
return bmLeft -= bmRight; |
| 457 |
} |
| 458 |
|
| 459 |
inline ABitMap2 |
| 460 |
operator~(ABitMap2 bmUnary) |
| 461 |
{ |
| 462 |
bmUnary.Invert(); |
| 463 |
return bmUnary; |
| 464 |
} |
| 465 |
|
| 466 |
// Function to write a bitmap to a BMP file |
| 467 |
extern bool WriteBitMap(const ABitMap &bm, const char *fname); |
| 468 |
|
| 469 |
// Function to write a 2-D bitmap to a BMP file |
| 470 |
extern bool WriteBitMap2(const ABitMap2 &bm2, const char *fname); |
| 471 |
|
| 472 |
// Function to read a bitmap from a BMP file |
| 473 |
extern bool ReadBitMap(ABitMap *bmp, const char *fname); |
| 474 |
|
| 475 |
// Function to read a 2-D bitmap from a BMP file |
| 476 |
extern bool ReadBitMap2(ABitMap2 *bm2p, const char *fname); |
| 477 |
|
| 478 |
#endif // ! _ABITMAP_H_ |
