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      1 // Copyright 2014 PDFium Authors. All rights reserved.
      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 "xfa/fxbarcode/common/BC_CommonBitArray.h"
     24 #include "xfa/fxbarcode/common/BC_CommonBitMatrix.h"
     25 #include "xfa/fxbarcode/utils.h"
     26 
     27 CBC_CommonBitMatrix::CBC_CommonBitMatrix() {
     28   m_width = 0;
     29   m_height = 0;
     30   m_rowSize = 0;
     31   m_bits = nullptr;
     32 }
     33 void CBC_CommonBitMatrix::Init(int32_t dimension) {
     34   m_width = dimension;
     35   m_height = dimension;
     36   int32_t rowSize = (m_height + 31) >> 5;
     37   m_rowSize = rowSize;
     38   m_bits = FX_Alloc2D(int32_t, m_rowSize, m_height);
     39   FXSYS_memset(m_bits, 0, m_rowSize * m_height * sizeof(int32_t));
     40 }
     41 void CBC_CommonBitMatrix::Init(int32_t width, int32_t height) {
     42   m_width = width;
     43   m_height = height;
     44   int32_t rowSize = (width + 31) >> 5;
     45   m_rowSize = rowSize;
     46   m_bits = FX_Alloc2D(int32_t, m_rowSize, m_height);
     47   FXSYS_memset(m_bits, 0, m_rowSize * m_height * sizeof(int32_t));
     48 }
     49 CBC_CommonBitMatrix::~CBC_CommonBitMatrix() {
     50   FX_Free(m_bits);
     51 }
     52 bool CBC_CommonBitMatrix::Get(int32_t x, int32_t y) {
     53   int32_t offset = y * m_rowSize + (x >> 5);
     54   if (offset >= m_rowSize * m_height || offset < 0) {
     55     return false;
     56   }
     57   return ((((uint32_t)m_bits[offset]) >> (x & 0x1f)) & 1) != 0;
     58 }
     59 int32_t* CBC_CommonBitMatrix::GetBits() {
     60   return m_bits;
     61 }
     62 void CBC_CommonBitMatrix::Set(int32_t x, int32_t y) {
     63   int32_t offset = y * m_rowSize + (x >> 5);
     64   if (offset >= m_rowSize * m_height || offset < 0) {
     65     return;
     66   }
     67   m_bits[offset] |= 1 << (x & 0x1f);
     68 }
     69 void CBC_CommonBitMatrix::Flip(int32_t x, int32_t y) {
     70   int32_t offset = y * m_rowSize + (x >> 5);
     71   m_bits[offset] ^= 1 << (x & 0x1f);
     72 }
     73 void CBC_CommonBitMatrix::Clear() {
     74   FXSYS_memset(m_bits, 0, m_rowSize * m_height * sizeof(int32_t));
     75 }
     76 void CBC_CommonBitMatrix::SetRegion(int32_t left,
     77                                     int32_t top,
     78                                     int32_t width,
     79                                     int32_t height,
     80                                     int32_t& e) {
     81   if (top < 0 || left < 0) {
     82     e = BCExceptionLeftAndTopMustBeNonnegative;
     83     return;
     84   }
     85   if (height < 1 || width < 1) {
     86     e = BCExceptionHeightAndWidthMustBeAtLeast1;
     87     return;
     88   }
     89   int32_t right = left + width;
     90   int32_t bottom = top + height;
     91   if (m_height < bottom || m_width < right) {
     92     e = BCExceptionRegionMustFitInsideMatrix;
     93     return;
     94   }
     95   int32_t y;
     96   for (y = top; y < bottom; y++) {
     97     int32_t offset = y * m_rowSize;
     98     int32_t x;
     99     for (x = left; x < right; x++) {
    100       m_bits[offset + (x >> 5)] |= 1 << (x & 0x1f);
    101     }
    102   }
    103 }
    104 CBC_CommonBitArray* CBC_CommonBitMatrix::GetRow(int32_t y,
    105                                                 CBC_CommonBitArray* row) {
    106   CBC_CommonBitArray* rowArray = nullptr;
    107   if (!row || row->GetSize() < m_width) {
    108     rowArray = new CBC_CommonBitArray(m_width);
    109   } else {
    110     rowArray = new CBC_CommonBitArray(row);
    111   }
    112   int32_t offset = y * m_rowSize;
    113   int32_t x;
    114   for (x = 0; x < m_rowSize; x++) {
    115     rowArray->SetBulk(x << 5, m_bits[offset + x]);
    116   }
    117   return rowArray;
    118 }
    119 void CBC_CommonBitMatrix::SetRow(int32_t y, CBC_CommonBitArray* row) {
    120   int32_t l = y * m_rowSize;
    121   for (int32_t i = 0; i < m_rowSize; i++) {
    122     m_bits[l] = row->GetBitArray()[i];
    123     l++;
    124   }
    125 }
    126 void CBC_CommonBitMatrix::SetCol(int32_t y, CBC_CommonBitArray* col) {
    127   for (int32_t i = 0; i < col->GetBits().GetSize(); i++) {
    128     m_bits[i * m_rowSize + y] = col->GetBitArray()[i];
    129   }
    130 }
    131 int32_t CBC_CommonBitMatrix::GetWidth() {
    132   return m_width;
    133 }
    134 int32_t CBC_CommonBitMatrix::GetHeight() {
    135   return m_height;
    136 }
    137 int32_t CBC_CommonBitMatrix::GetRowSize() {
    138   return m_rowSize;
    139 }
    140 int32_t CBC_CommonBitMatrix::GetDimension(int32_t& e) {
    141   if (m_width != m_height) {
    142     e = BCExceptionCanNotCallGetDimensionOnNonSquareMatrix;
    143     return 0;
    144   }
    145   return m_width;
    146 }
    147