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92 lines
2.4 KiB
C++
92 lines
2.4 KiB
C++
// -*- mode:c++; tab-width:2; indent-tabs-mode:nil; c-basic-offset:2 -*-
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#ifndef __BIT_MATRIX_H__
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#define __BIT_MATRIX_H__
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/*
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* BitMatrix.h
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* zxing
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*
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* Copyright 2010 ZXing authors All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <zxing/common/Counted.h>
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#include <zxing/common/BitArray.h>
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#include <zxing/common/Array.h>
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#include <limits>
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namespace zxing {
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class BitMatrix : public Counted {
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public:
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static const int bitsPerWord = std::numeric_limits<unsigned int>::digits;
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private:
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int width;
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int height;
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int rowSize;
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ArrayRef<int> bits;
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#define ZX_LOG_DIGITS(digits) \
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((digits == 8) ? 3 : \
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((digits == 16) ? 4 : \
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((digits == 32) ? 5 : \
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((digits == 64) ? 6 : \
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((digits == 128) ? 7 : \
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(-1))))))
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static const int logBits = ZX_LOG_DIGITS(bitsPerWord);
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static const int bitsMask = (1 << logBits) - 1;
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public:
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BitMatrix(int dimension);
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BitMatrix(int width, int height);
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~BitMatrix();
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bool get(int x, int y) const {
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int offset = y * rowSize + (x >> logBits);
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return ((((unsigned)bits[offset]) >> (x & bitsMask)) & 1) != 0;
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}
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void set(int x, int y) {
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int offset = y * rowSize + (x >> logBits);
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bits[offset] |= 1 << (x & bitsMask);
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}
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void flip(int x, int y);
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void clear();
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void setRegion(int left, int top, int width, int height);
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Ref<BitArray> getRow(int y, Ref<BitArray> row);
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int getWidth() const;
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int getHeight() const;
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ArrayRef<int> getTopLeftOnBit() const;
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ArrayRef<int> getBottomRightOnBit() const;
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friend std::ostream& operator<<(std::ostream &out, const BitMatrix &bm);
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const char *description();
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private:
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inline void init(int, int);
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BitMatrix(const BitMatrix&);
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BitMatrix& operator =(const BitMatrix&);
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};
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}
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#endif // __BIT_MATRIX_H__
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