1 // Copyright 2014 The PDFium Authors
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
6 // Original code is licensed as follows:
7 /*
8 * Copyright 2007 ZXing authors
9 *
10 * Licensed under the Apache License, Version 2.0 (the "License");
11 * you may not use this file except in compliance with the License.
12 * You may obtain a copy of the License at
13 *
14 * http://www.apache.org/licenses/LICENSE-2.0
15 *
16 * Unless required by applicable law or agreed to in writing, software
17 * distributed under the License is distributed on an "AS IS" BASIS,
18 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
19 * See the License for the specific language governing permissions and
20 * limitations under the License.
21 */
22
23 #include "fxbarcode/common/BC_CommonBitMatrix.h"
24
25 #include "core/fxcrt/fixed_zeroed_data_vector.h"
26 #include "third_party/base/check_op.h"
27
CBC_CommonBitMatrix(size_t width,size_t height)28 CBC_CommonBitMatrix::CBC_CommonBitMatrix(size_t width, size_t height)
29 : m_height(height), m_rowSize((width + 31) >> 5) {
30 static constexpr int32_t kMaxBits = 1024 * 1024 * 1024; // 1 Gb.
31 CHECK_LT(m_rowSize, kMaxBits / m_height);
32 m_bits = FixedZeroedDataVector<uint32_t>(m_rowSize * m_height);
33 }
34
35 CBC_CommonBitMatrix::~CBC_CommonBitMatrix() = default;
36
Get(size_t x,size_t y) const37 bool CBC_CommonBitMatrix::Get(size_t x, size_t y) const {
38 size_t offset = y * m_rowSize + (x >> 5);
39 return ((m_bits.span()[offset] >> (x & 0x1f)) & 1) != 0;
40 }
41
Set(size_t x,size_t y)42 void CBC_CommonBitMatrix::Set(size_t x, size_t y) {
43 size_t offset = y * m_rowSize + (x >> 5);
44 m_bits.writable_span()[offset] |= 1u << (x & 0x1f);
45 }
46