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138 lines
2.8 KiB
C++
138 lines
2.8 KiB
C++
//-----------------------------------------------------------------------------
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// V12 Engine
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//
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// Copyright (c) 2001 GarageGames.Com
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// Portions Copyright (c) 2001 by Sierra Online, Inc.
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//-----------------------------------------------------------------------------
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#ifndef _BITMATRIX_H_
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#define _BITMATRIX_H_
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#ifndef _PLATFORM_H_
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#include "Platform/platform.h"
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#endif
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#ifndef _BITVECTOR_H_
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#include "Core/bitVector.h"
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#endif
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class BitMatrix
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{
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U32 mWidth;
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U32 mHeight;
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U32 mRowByteWidth;
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U8* mBits;
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U32 mSize;
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BitVector mColFlags;
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BitVector mRowFlags;
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public:
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BitMatrix(const U32 width, const U32 height);
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~BitMatrix();
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void clearAllBits();
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void setAllBits();
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void setBit(const U32 x, const U32 y);
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void clearBit(const U32 x, const U32 y);
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// Queries
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bool isSet(const U32 x, const U32 y) const;
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bool isAnySetCol(const U32 x);
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bool isAnySetRow(const U32 y);
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};
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inline BitMatrix::BitMatrix(const U32 width, const U32 height)
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: mColFlags(width),
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mRowFlags(height)
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{
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AssertFatal(width != 0 && height != 0, "Error, w/h must be non-zero");
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mWidth = width;
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mHeight = height;
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mRowByteWidth = (width + 7) >> 3;
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mSize = mRowByteWidth * mHeight;
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mBits = new U8[mSize];
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}
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inline BitMatrix::~BitMatrix()
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{
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mWidth = 0;
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mHeight = 0;
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mRowByteWidth = 0;
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mSize = 0;
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delete [] mBits;
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mBits = NULL;
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}
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inline void BitMatrix::clearAllBits()
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{
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AssertFatal(mBits != NULL, "Error, clearing after deletion");
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dMemset(mBits, 0x00, mSize);
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mColFlags.clear();
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mRowFlags.clear();
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}
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inline void BitMatrix::setAllBits()
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{
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AssertFatal(mBits != NULL, "Error, setting after deletion");
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dMemset(mBits, 0xFF, mSize);
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mColFlags.set();
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mRowFlags.set();
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}
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inline void BitMatrix::setBit(const U32 x, const U32 y)
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{
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AssertFatal(x < mWidth && y < mHeight, "Error, out of bounds bit!");
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U8* pRow = &mBits[y * mRowByteWidth];
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U8* pByte = &pRow[x >> 3];
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*pByte |= 1 << (x & 0x7);
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mColFlags.set(x);
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mRowFlags.set(y);
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}
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inline void BitMatrix::clearBit(const U32 x, const U32 y)
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{
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AssertFatal(x < mWidth && y < mHeight, "Error, out of bounds bit!");
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U8* pRow = &mBits[y * mRowByteWidth];
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U8* pByte = &pRow[x >> 3];
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*pByte &= ~(1 << (x & 0x7));
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}
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inline bool BitMatrix::isSet(const U32 x, const U32 y) const
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{
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AssertFatal(x < mWidth && y < mHeight, "Error, out of bounds bit!");
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U8* pRow = &mBits[y * mRowByteWidth];
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U8* pByte = &pRow[x >> 3];
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return (*pByte & (1 << (x & 0x7))) != 0;
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}
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inline bool BitMatrix::isAnySetCol(const U32 x)
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{
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AssertFatal(x < mWidth, "Error, out of bounds column!");
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return mColFlags.test(x);
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}
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inline bool BitMatrix::isAnySetRow(const U32 y)
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{
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AssertFatal(y < mHeight, "Error, out of bounds row!");
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return mRowFlags.test(y);
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}
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#endif // _H_BITMATRIX_
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