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// Copyright 2014 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
#include "barcode.h"
#include "include/BC_Encoder.h"
#include "include/BC_DefaultPlacement.h"
CBC_DefaultPlacement::CBC_DefaultPlacement(CFX_WideString codewords, FX_INT32 numcols, FX_INT32 numrows)
{
m_codewords = codewords;
m_numcols = numcols;
m_numrows = numrows;
m_bits.SetSize(numcols * numrows);
for (FX_INT32 i = 0; i < numcols * numrows; i++) {
m_bits[i] = (FX_BYTE) 2;
}
}
CBC_DefaultPlacement::~CBC_DefaultPlacement()
{
m_bits.RemoveAll();
}
FX_INT32 CBC_DefaultPlacement::getNumrows()
{
return m_numrows;
}
FX_INT32 CBC_DefaultPlacement::getNumcols()
{
return m_numcols;
}
CFX_ByteArray& CBC_DefaultPlacement::getBits()
{
return m_bits;
}
FX_BOOL CBC_DefaultPlacement::getBit(FX_INT32 col, FX_INT32 row)
{
return m_bits[row * m_numcols + col] == 1;
}
void CBC_DefaultPlacement::setBit(FX_INT32 col, FX_INT32 row, FX_BOOL bit)
{
m_bits[row * m_numcols + col] = bit ? (FX_BYTE) 1 : (FX_BYTE) 0;
}
FX_BOOL CBC_DefaultPlacement::hasBit(FX_INT32 col, FX_INT32 row)
{
return m_bits[row * m_numcols + col] != 2;
}
void CBC_DefaultPlacement::place()
{
FX_INT32 pos = 0;
FX_INT32 row = 4;
FX_INT32 col = 0;
do {
if ((row == m_numrows) && (col == 0)) {
corner1(pos++);
}
if ((row == m_numrows - 2) && (col == 0) && ((m_numcols % 4) != 0)) {
corner2(pos++);
}
if ((row == m_numrows - 2) && (col == 0) && (m_numcols % 8 == 4)) {
corner3(pos++);
}
if ((row == m_numrows + 4) && (col == 2) && ((m_numcols % 8) == 0)) {
corner4(pos++);
}
do {
if ((row < m_numrows) && (col >= 0) && !hasBit(col, row)) {
utah(row, col, pos++);
}
row -= 2;
col += 2;
} while (row >= 0 && (col < m_numcols));
row++;
col += 3;
do {
if ((row >= 0) && (col < m_numcols) && !hasBit(col, row)) {
utah(row, col, pos++);
}
row += 2;
col -= 2;
} while ((row < m_numrows) && (col >= 0));
row += 3;
col++;
} while ((row < m_numrows) || (col < m_numcols));
if (!hasBit(m_numcols - 1, m_numrows - 1)) {
setBit(m_numcols - 1, m_numrows - 1, TRUE);
setBit(m_numcols - 2, m_numrows - 2, TRUE);
}
}
void CBC_DefaultPlacement::module(FX_INT32 row, FX_INT32 col, FX_INT32 pos, FX_INT32 bit)
{
if (row < 0) {
row += m_numrows;
col += 4 - ((m_numrows + 4) % 8);
}
if (col < 0) {
col += m_numcols;
row += 4 - ((m_numcols + 4) % 8);
}
FX_INT32 v = m_codewords.GetAt(pos);
v &= 1 << (8 - bit);
setBit(col, row, v != 0);
}
void CBC_DefaultPlacement::utah(FX_INT32 row, FX_INT32 col, FX_INT32 pos)
{
module(row - 2, col - 2, pos, 1);
module(row - 2, col - 1, pos, 2);
module(row - 1, col - 2, pos, 3);
module(row - 1, col - 1, pos, 4);
module(row - 1, col, pos, 5);
module(row, col - 2, pos, 6);
module(row, col - 1, pos, 7);
module(row, col, pos, 8);
}
void CBC_DefaultPlacement::corner1(FX_INT32 pos)
{
module(m_numrows - 1, 0, pos, 1);
module(m_numrows - 1, 1, pos, 2);
module(m_numrows - 1, 2, pos, 3);
module(0, m_numcols - 2, pos, 4);
module(0, m_numcols - 1, pos, 5);
module(1, m_numcols - 1, pos, 6);
module(2, m_numcols - 1, pos, 7);
module(3, m_numcols - 1, pos, 8);
}
void CBC_DefaultPlacement::corner2(FX_INT32 pos)
{
module(m_numrows - 3, 0, pos, 1);
module(m_numrows - 2, 0, pos, 2);
module(m_numrows - 1, 0, pos, 3);
module(0, m_numcols - 4, pos, 4);
module(0, m_numcols - 3, pos, 5);
module(0, m_numcols - 2, pos, 6);
module(0, m_numcols - 1, pos, 7);
module(1, m_numcols - 1, pos, 8);
}
void CBC_DefaultPlacement::corner3(FX_INT32 pos)
{
module(m_numrows - 3, 0, pos, 1);
module(m_numrows - 2, 0, pos, 2);
module(m_numrows - 1, 0, pos, 3);
module(0, m_numcols - 2, pos, 4);
module(0, m_numcols - 1, pos, 5);
module(1, m_numcols - 1, pos, 6);
module(2, m_numcols - 1, pos, 7);
module(3, m_numcols - 1, pos, 8);
}
void CBC_DefaultPlacement::corner4(FX_INT32 pos)
{
module(m_numrows - 1, 0, pos, 1);
module(m_numrows - 1, m_numcols - 1, pos, 2);
module(0, m_numcols - 3, pos, 3);
module(0, m_numcols - 2, pos, 4);
module(0, m_numcols - 1, pos, 5);
module(1, m_numcols - 3, pos, 6);
module(1, m_numcols - 2, pos, 7);
module(1, m_numcols - 1, pos, 8);
}
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