46 lines
1.6 KiB
C++
46 lines
1.6 KiB
C++
// Copyright 2014 The PDFium Authors
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
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// Original code is licensed as follows:
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/*
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* Copyright 2007 ZXing authors
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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 "fxbarcode/common/BC_CommonBitMatrix.h"
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#include "core/fxcrt/fixed_zeroed_data_vector.h"
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#include "third_party/base/check_op.h"
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CBC_CommonBitMatrix::CBC_CommonBitMatrix(size_t width, size_t height)
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: m_height(height), m_rowSize((width + 31) >> 5) {
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static constexpr int32_t kMaxBits = 1024 * 1024 * 1024; // 1 Gb.
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CHECK_LT(m_rowSize, kMaxBits / m_height);
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m_bits = FixedZeroedDataVector<uint32_t>(m_rowSize * m_height);
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}
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CBC_CommonBitMatrix::~CBC_CommonBitMatrix() = default;
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bool CBC_CommonBitMatrix::Get(size_t x, size_t y) const {
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size_t offset = y * m_rowSize + (x >> 5);
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return ((m_bits.span()[offset] >> (x & 0x1f)) & 1) != 0;
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}
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void CBC_CommonBitMatrix::Set(size_t x, size_t y) {
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size_t offset = y * m_rowSize + (x >> 5);
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m_bits.writable_span()[offset] |= 1u << (x & 0x1f);
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}
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