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greg |
2.3 |
/* RCSid $Id: abitmap.h,v 2.2 2024/08/24 23:25:24 greg Exp $ */ |
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greg |
2.1 |
/* |
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* abitmap.h |
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* |
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* General bitmap class (mostly inline) |
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* |
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* Created by gward on Tue May 15 2001. |
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*/ |
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#ifndef _ABITMAP_H_ |
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#define _ABITMAP_H_ |
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#ifndef _TIFF_ |
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#include "tiff.h" /* needed for uint32 type */ |
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#endif |
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#define ABMend 0xffffffff // terminal return |
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// Inline bitmap class |
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class ABitMap { |
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private: |
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uint32 * bmap; // bitmap storage |
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uint32 len; // bitmap size |
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public: |
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ABitMap() { len=0; bmap=0; } |
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ABitMap(uint32 n, bool clrset=false) { |
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bmap=0; len=0; NewBitMap(n,clrset); |
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} |
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ABitMap(const ABitMap &orig) { |
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bmap=0; len=0; *this=orig; |
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} |
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~ABitMap() { |
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delete [] bmap; |
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} |
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// Access to raw word data |
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uint32 * base() { |
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return bmap; |
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} |
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// Read-only word access |
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const uint32 * base() const { |
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return bmap; |
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} |
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// Number of words from #bits |
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static int32 bmlen(uint32 nbits) { |
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return (nbits+0x1f)>>5; |
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} |
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// Total number of words |
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int32 bmlen() const { |
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return bmlen(len); |
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} |
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// Reallocate and clear bitmap |
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bool NewBitMap(uint32 n, bool clrset=false); |
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// Clear bitmap to all 0's or 1's |
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void ClearBitMap(bool clrset=false); |
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// Steal another bitmap's contents |
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bool Take(ABitMap *srcp) { |
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if (srcp == this) return false; |
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delete [] bmap; bmap=0; len=0; |
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if (!srcp) return false; |
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bmap=srcp->bmap; len=srcp->len; |
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srcp->bmap=0; srcp->len=0; |
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return len; |
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} |
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// Return number of bits in bitmap |
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uint32 Length() const { |
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return len; |
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} |
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// Get original length if RLE (or 0) |
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uint32 RLength() const; |
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// Compress into a run-length encoded bitmap |
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bool GetRLE(ABitMap *rlep) const; |
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// Reconstitute bits from RLE encoding |
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bool SetFromRLE(const ABitMap &rle); |
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// Extract bitmap section (true if some overlap) |
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bool GetBits(ABitMap *dp, uint32 i) const; |
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// Extract bitmap section (fill if past end) |
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ABitMap GetBits(uint32 i, uint32 n, bool fill=false) const { |
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ABitMap bm(n, fill); |
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GetBits(&bm, i); |
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return bm; |
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} |
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// Overlay bitmap section (ignores bits past end) |
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bool AssignBits(uint32 i, const ABitMap &src); |
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// Apply operation to bitmap section |
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bool OpBits(uint32 i, char op, const ABitMap &src); |
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// Clear bitmap section |
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void ClearBits(uint32 i, uint32 n, bool clrset=false); |
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// Clear bits set in second bitmap |
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bool ClearBitsFrom(const ABitMap &src); |
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// Count number of bits set in bitmap |
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uint32 SumTotal(bool bit2cnt = true) const; |
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// Return the next bit position matching val (or ABMend) |
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uint32 Find(uint32 i = 0, bool val = true) const; |
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uint32 Find(int i, bool val = true) const { |
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return Find((uint32)i, val); |
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} |
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uint32 Find(long i, bool val = true) const { |
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return Find((uint32)i, val); |
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} |
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// Different interface to find the next bit matching val |
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bool Find(uint32 *ip, bool val = true) const { |
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if (!ip) return false; |
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if (*ip >= len) return false; |
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*ip = Find(*ip, val); |
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return (*ip < len); |
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} |
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// Access word for i'th bit |
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uint32 & Word(uint32 i) { |
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static uint32 dummy; |
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if (i >= len) return dummy; |
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return bmap[i>>5]; |
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} |
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// Get word value for i'th bit (0 if out of range) |
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uint32 WordV(uint32 i) const { |
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if (i >= len) return 0; |
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return bmap[i>>5]; |
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} |
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// Index corresponding bit in word |
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static uint32 Bit(uint32 i) { |
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return 1 << (i & 0x1f); |
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} |
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// Return value of i'th bit in bitmap |
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bool Check(uint32 i) const { |
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return (WordV(i) & Bit(i)); |
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} |
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// Set i'th bit |
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void Set(uint32 i) { |
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Word(i) |= Bit(i); |
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} |
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// Reset i'th bit |
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void Reset(uint32 i) { |
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Word(i) &= ~Bit(i); |
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} |
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// Set i'th bit explicitly on or off |
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void Set(uint32 i, bool switchon) { |
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uint32 b = Bit(i); |
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uint32 & w = Word(i); |
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if (switchon) w |= b; |
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else w &= ~b; |
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} |
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// Toggle i'th bit |
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void Toggle(uint32 i) { |
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Word(i) ^= Bit(i); |
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} |
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// Set i'th bit if it's clear (or fail) |
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bool TestAndSet(uint32 i) { |
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if (i >= len) return false; |
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uint32 b = Bit(i); |
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uint32 & w = Word(i); |
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uint32 wasset = w & b; |
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w |= b; |
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return !wasset; |
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} |
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// Clear i'th bit if it's set (or fail) |
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bool TestAndReset(uint32 i) { |
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if (i >= len) return false; |
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uint32 b = Bit(i); |
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uint32 & w = Word(i); |
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uint32 wasset = w & b; |
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w &= ~b; |
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return wasset; |
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} |
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// Set i'th bit on/off (fail if no change) |
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bool TestAndSet(uint32 i, bool switchon) { |
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return switchon ? TestAndSet(i) : TestAndReset(i); |
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} |
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// Invert the entire bitmap |
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void Invert(); |
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// Downward shift operator, zero fill |
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ABitMap & operator>>=(uint32 nbits); |
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// Upward shift operator, zero fill |
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ABitMap & operator<<=(uint32 nbits); |
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// Copy operator |
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ABitMap & operator=(const ABitMap &src); |
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// Bitwise OR-copy operator |
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ABitMap & operator|=(const ABitMap &src); |
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// Bitwise AND-assign operator |
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ABitMap & operator&=(const ABitMap &src); |
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// Bitwise XOR-assign operator |
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ABitMap & operator^=(const ABitMap &src); |
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// Subtraction operator, synonym for ClearBitsFrom() |
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ABitMap & operator-=(const ABitMap &src) { |
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ClearBitsFrom(src); |
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return *this; |
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} |
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// Compare two bitmaps for equality |
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bool operator==(const ABitMap &that) const; |
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}; |
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inline bool |
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operator!=(const ABitMap &bm1, const ABitMap &bm2) |
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{ |
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return !(bm1 == bm2); |
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} |
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inline ABitMap |
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operator>>(ABitMap bmLeft, uint32 nbr) |
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{ |
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return bmLeft >>= nbr; |
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} |
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inline ABitMap |
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operator<<(ABitMap bmLeft, uint32 nbl) |
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{ |
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return bmLeft <<= nbl; |
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} |
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inline ABitMap |
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operator|(ABitMap bmLeft, const ABitMap &bmRight) |
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{ |
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return bmLeft |= bmRight; |
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} |
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inline ABitMap |
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operator&(ABitMap bmLeft, const ABitMap &bmRight) |
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{ |
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return bmLeft &= bmRight; |
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} |
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inline ABitMap |
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operator^(ABitMap bmLeft, const ABitMap &bmRight) |
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{ |
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return bmLeft ^= bmRight; |
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} |
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inline ABitMap |
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operator-(ABitMap bmLeft, const ABitMap &bmRight) |
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{ |
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return bmLeft -= bmRight; |
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} |
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inline ABitMap |
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operator~(ABitMap bmUnary) |
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{ |
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bmUnary.Invert(); |
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return bmUnary; |
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} |
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// 2-dimensional bitmap class |
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class ABitMap2 : protected ABitMap { |
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private: |
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int width, height; // bitmap dimensions |
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protected: |
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uint32 bmi(int x, int y) const { |
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if (OffBitMap(x, y)) return ABMend; |
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return (uint32)y*width + x; |
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} |
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public: |
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ABitMap2() { width=height=0; } |
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ABitMap2(int w, int h, bool clrset=false) : |
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ABitMap((w>0)&(h>0)&&(w <= ABMend/h) |
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? (uint32)w*h : (uint32)0, clrset) { |
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if (Length()) { |
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width=w; height=h; |
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} else { width=height=0; } |
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} |
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ABitMap2(const ABitMap2 &orig) { |
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*this=orig; |
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} |
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// Access to raw word data |
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uint32 * base() { |
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return ABitMap::base(); |
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} |
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// Read-only word access |
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const uint32 * base() const { |
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return ABitMap::base(); |
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} |
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// Total number of words |
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int32 bmlen() const { |
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return ABitMap::bmlen(); |
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} |
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// Return bitmap width |
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int Width() const { |
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return width; |
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} |
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// Return bitmap height |
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int Height() const { |
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return height; |
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} |
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// Is the indicated bit off our bitmap? |
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bool OffBitMap(int x, int y) const { |
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return ((x < 0) | (x >= width) | |
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(y < 0) | (y >= height)); |
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} |
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// Count number of bits set in bitmap |
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uint32 SumTotal(bool bit2cnt = true) const { |
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return ABitMap::SumTotal(bit2cnt); |
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} |
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// Reallocate and clear bitmap |
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bool NewBitMap(int w, int h, bool clrset=false) { |
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if ((w <= 0) | (h <= 0) || w > ABMend/h) |
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w = h = 0; |
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width=w; height=h; |
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return ABitMap::NewBitMap((uint32)w*h, clrset); |
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} |
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// Clear bitmap to all 0's or 1's |
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void ClearBitMap(bool clrset=false) { |
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ABitMap::ClearBitMap(clrset); |
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} |
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// Compress with run-length encoding into a 1-D bitmap |
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bool GetRLE(ABitMap *rlep) const { |
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return ABitMap::GetRLE(rlep); |
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} |
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// Reconstitute bits from RLE encoding (size must match) |
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bool SetFromRLE(int w, int h, const ABitMap &rle); |
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// Steal another bitmap's contents |
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bool Take(ABitMap2 *srcp) { |
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if (srcp == this) return false; |
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width=height=0; |
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if (!ABitMap::Take(srcp)) return false; |
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width=srcp->width; height=srcp->height; |
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srcp->width=srcp->height=0; |
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return true; |
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} |
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// Extract bitmap section (true if some overlap) |
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bool GetRect(ABitMap2 *dp, int sx, int sy) const; |
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// Extract bitmap section (fill outside overlap) |
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ABitMap2 GetRect(int sx, int sy, int w, int h, bool fill=false) const { |
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ABitMap2 bm2(w, h, fill); |
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GetRect(&bm2, sx, sy); |
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return bm2; |
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} |
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// Assign bitmap section (ignores anything past edges) |
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bool AssignRect(int dx, int dy, const ABitMap2 &src); |
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// Apply operation to bitmap section |
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bool OpRect(int dx, int dy, char op, const ABitMap2 &src); |
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// Clear a rectangle |
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void ClearRect(int x, int y, int w, int h, bool clrset=false); |
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// Find the next bit matching val (scanline order) |
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bool Find(int *xp, int *yp, bool val=true) const { |
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if (!xp | !yp) return false; |
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if (width <= 0) return false; |
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if ((*xp < 0) | (*yp < 0)) *xp = *yp = 0; |
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else if (*xp >= width) { *xp=0; ++(*yp); } |
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uint32 i = ABitMap::Find(bmi(*xp,*yp), val); |
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if (i == ABMend) { *yp = height; return false; } |
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*yp = int(i / width); |
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*xp = int(i - *yp*width); |
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return true; |
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} |
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// Get bounds of assigned region |
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bool GetBoundRect(int xymin[2], int wh[2], bool val=true) const; |
| 342 |
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// Return value of bit in bitmap |
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bool Check(int x, int y) const { |
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return ABitMap::Check(bmi(x,y)); |
| 345 |
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} |
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// Set bit |
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void Set(int x, int y) { |
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ABitMap::Set(bmi(x,y)); |
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} |
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// Reset bit |
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void Reset(int x, int y) { |
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ABitMap::Reset(bmi(x,y)); |
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} |
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// Set bit explicitly on or off |
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void Set(int x, int y, bool switchon) { |
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ABitMap::Set(bmi(x,y), switchon); |
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} |
| 358 |
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// Toggle bit |
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void Toggle(int x, int y) { |
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ABitMap::Toggle(bmi(x,y)); |
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} |
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// Set bit if it's clear (or fail) |
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bool TestAndSet(int x, int y) { |
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return ABitMap::TestAndSet(bmi(x,y)); |
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} |
| 366 |
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// Clear bit if it's set (or fail) |
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bool TestAndReset(int x, int y) { |
| 368 |
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return ABitMap::TestAndReset(bmi(x,y)); |
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} |
| 370 |
|
|
// Set bit on/off (fail if no change) |
| 371 |
|
|
bool TestAndSet(int x, int y, bool switchon) { |
| 372 |
|
|
return ABitMap::TestAndSet(bmi(x,y), switchon); |
| 373 |
|
|
} |
| 374 |
|
|
// Invert the entire bitmap |
| 375 |
|
|
void Invert() { |
| 376 |
|
|
ABitMap::Invert(); |
| 377 |
|
|
} |
| 378 |
|
|
// Shift bitmap, filling uncovered area as indicated |
| 379 |
|
|
void Shift(int dx, int dy, int fill=0); |
| 380 |
|
|
// Dilate (or erode) selection by given radius |
| 381 |
|
|
void Expand(double rad, bool val=true); |
| 382 |
|
|
// Clear bits set in second map |
| 383 |
|
|
bool ClearBitsFrom(const ABitMap2 &src) { |
| 384 |
|
|
if (width != src.width) |
| 385 |
|
|
return false; |
| 386 |
|
|
return ABitMap::ClearBitsFrom(src); |
| 387 |
|
|
} |
| 388 |
|
|
// Copy operator |
| 389 |
|
|
ABitMap2 & operator=(const ABitMap2 &src) { |
| 390 |
|
|
ABitMap::operator=(src); |
| 391 |
|
|
width=src.width; height=src.height; |
| 392 |
|
|
return *this; |
| 393 |
|
|
} |
| 394 |
|
|
// Bitwise OR-copy operator |
| 395 |
|
|
ABitMap2 & operator|=(const ABitMap2 &src) { |
| 396 |
|
|
ABitMap::operator|=(src); |
| 397 |
|
|
width=src.width; height=src.height; |
| 398 |
|
|
return *this; |
| 399 |
|
|
} |
| 400 |
|
|
// Bitwise AND-assign operator |
| 401 |
|
|
ABitMap2 & operator&=(const ABitMap2 &src) { |
| 402 |
|
|
if ((width!=src.width)|(height!=src.height)) |
| 403 |
|
|
return *this; |
| 404 |
|
|
ABitMap::operator&=(src); |
| 405 |
|
|
return *this; |
| 406 |
|
|
} |
| 407 |
|
|
// Bitwise XOR-assign operator |
| 408 |
|
|
ABitMap2 & operator^=(const ABitMap2 &src) { |
| 409 |
|
|
if ((width!=src.width)|(height!=src.height)) |
| 410 |
|
|
return *this; |
| 411 |
|
|
ABitMap::operator^=(src); |
| 412 |
|
|
return *this; |
| 413 |
|
|
} |
| 414 |
|
|
// Subtraction operator, synonym for ClearBitsFrom() |
| 415 |
|
|
ABitMap2 & operator-=(const ABitMap2 &src) { |
| 416 |
|
|
ClearBitsFrom(src); |
| 417 |
|
|
return *this; |
| 418 |
|
|
} |
| 419 |
|
|
// Compare two bitmaps for equality |
| 420 |
|
|
bool operator==(const ABitMap2 &that) const { |
| 421 |
|
|
if (width != that.width) |
| 422 |
|
|
return false; |
| 423 |
|
|
return ABitMap::operator==(that); |
| 424 |
|
|
} |
| 425 |
|
|
}; |
| 426 |
|
|
|
| 427 |
|
|
inline bool |
| 428 |
|
|
operator!=(const ABitMap2 &bm1, const ABitMap2 &bm2) |
| 429 |
|
|
{ |
| 430 |
|
|
return !(bm1 == bm2); |
| 431 |
|
|
} |
| 432 |
|
|
|
| 433 |
|
|
inline ABitMap2 |
| 434 |
|
|
operator|(ABitMap2 bmLeft, const ABitMap2 &bmRight) |
| 435 |
|
|
{ |
| 436 |
|
|
return bmLeft |= bmRight; |
| 437 |
|
|
} |
| 438 |
|
|
|
| 439 |
|
|
inline ABitMap2 |
| 440 |
|
|
operator&(ABitMap2 bmLeft, const ABitMap2 &bmRight) |
| 441 |
|
|
{ |
| 442 |
|
|
return bmLeft &= bmRight; |
| 443 |
|
|
} |
| 444 |
|
|
|
| 445 |
|
|
inline ABitMap2 |
| 446 |
|
|
operator^(ABitMap2 bmLeft, const ABitMap2 &bmRight) |
| 447 |
|
|
{ |
| 448 |
|
|
return bmLeft ^= bmRight; |
| 449 |
|
|
} |
| 450 |
|
|
|
| 451 |
|
|
inline ABitMap2 |
| 452 |
|
|
operator-(ABitMap2 bmLeft, const ABitMap2 &bmRight) |
| 453 |
|
|
{ |
| 454 |
|
|
return bmLeft -= bmRight; |
| 455 |
|
|
} |
| 456 |
|
|
|
| 457 |
|
|
inline ABitMap2 |
| 458 |
|
|
operator~(ABitMap2 bmUnary) |
| 459 |
|
|
{ |
| 460 |
|
|
bmUnary.Invert(); |
| 461 |
|
|
return bmUnary; |
| 462 |
|
|
} |
| 463 |
|
|
|
| 464 |
|
|
// Function to write a bitmap to a BMP file |
| 465 |
|
|
extern bool WriteBitMap(const ABitMap &bm, const char *fname); |
| 466 |
|
|
|
| 467 |
|
|
// Function to write a 2-D bitmap to a BMP file |
| 468 |
|
|
extern bool WriteBitMap2(const ABitMap2 &bm2, const char *fname); |
| 469 |
|
|
|
| 470 |
|
|
// Function to read a bitmap from a BMP file |
| 471 |
|
|
extern bool ReadBitMap(ABitMap *bmp, const char *fname); |
| 472 |
|
|
|
| 473 |
|
|
// Function to read a 2-D bitmap from a BMP file |
| 474 |
|
|
extern bool ReadBitMap2(ABitMap2 *bm2p, const char *fname); |
| 475 |
|
|
|
| 476 |
|
|
#endif // ! _ABITMAP_H_ |
