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88 lines
2.4 KiB
C++
88 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 <limits>
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namespace zxing {
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class BitMatrix : public Counted {
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private:
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size_t width_;
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size_t height_;
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size_t words_;
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unsigned 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 unsigned int bitsPerWord =
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std::numeric_limits<unsigned int>::digits;
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static const unsigned int logBits = ZX_LOG_DIGITS(bitsPerWord);
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static const unsigned int bitsMask = (1 << logBits) - 1;
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public:
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BitMatrix(size_t dimension);
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BitMatrix(size_t width, size_t height);
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~BitMatrix();
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bool get(size_t x, size_t y) const {
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size_t offset = x + width_ * y;
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return ((bits_[offset >> logBits] >> (offset & bitsMask)) & 0x01) != 0;
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}
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void set(size_t x, size_t y) {
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size_t offset = x + width_ * y;
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bits_[offset >> logBits] |= 1 << (offset & bitsMask);
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}
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void flip(size_t x, size_t y);
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void clear();
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void setRegion(size_t left, size_t top, size_t width, size_t height);
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Ref<BitArray> getRow(int y, Ref<BitArray> row);
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size_t getDimension() const;
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size_t getWidth() const;
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size_t getHeight() const;
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unsigned int* getBits() 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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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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