xfa/fxbarcode/cbc_ean8.cpp

// Copyright 2016 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
/*
 * Copyright 2011 ZXing authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "xfa/fxbarcode/cbc_ean8.h"

#include "xfa/fxbarcode/BC_BinaryBitmap.h"
#include "xfa/fxbarcode/BC_BufferedImageLuminanceSource.h"
#include "xfa/fxbarcode/common/BC_GlobalHistogramBinarizer.h"
#include "xfa/fxbarcode/oned/BC_OnedEAN8Reader.h"
#include "xfa/fxbarcode/oned/BC_OnedEAN8Writer.h"

CBC_EAN8::CBC_EAN8() {
  m_pBCReader = (CBC_Reader*)new (CBC_OnedEAN8Reader);
  m_pBCWriter = (CBC_Writer*)new (CBC_OnedEAN8Writer);
}

CBC_EAN8::~CBC_EAN8() {
  delete (m_pBCReader);
  delete (m_pBCWriter);
}

CFX_WideString CBC_EAN8::Preprocess(const CFX_WideStringC& contents) {
  CFX_WideString encodeContents =
      ((CBC_OnedEAN8Writer*)m_pBCWriter)->FilterContents(contents);
  int32_t length = encodeContents.GetLength();
  if (length <= 7) {
    for (int32_t i = 0; i < 7 - length; i++)
      encodeContents = FX_WCHAR('0') + encodeContents;

    CFX_ByteString byteString = encodeContents.UTF8Encode();
    int32_t checksum =
        ((CBC_OnedEAN8Writer*)m_pBCWriter)->CalcChecksum(byteString);
    encodeContents += FX_WCHAR(checksum - 0 + '0');
  }
  if (length > 8)
    encodeContents = encodeContents.Mid(0, 8);

  return encodeContents;
}

FX_BOOL CBC_EAN8::Encode(const CFX_WideStringC& contents,
                         FX_BOOL isDevice,
                         int32_t& e) {
  if (contents.IsEmpty()) {
    e = BCExceptionNoContents;
    return FALSE;
  }
  BCFORMAT format = BCFORMAT_EAN_8;
  int32_t outWidth = 0;
  int32_t outHeight = 0;
  CFX_WideString encodeContents = Preprocess(contents);
  CFX_ByteString byteString = encodeContents.UTF8Encode();
  m_renderContents = encodeContents;
  uint8_t* data = static_cast<CBC_OnedEAN8Writer*>(m_pBCWriter)
                      ->Encode(byteString, format, outWidth, outHeight, e);
  BC_EXCEPTION_CHECK_ReturnValue(e, FALSE);
  ((CBC_OneDimWriter*)m_pBCWriter)
      ->RenderResult(encodeContents.AsStringC(), data, outWidth, isDevice, e);
  FX_Free(data);
  BC_EXCEPTION_CHECK_ReturnValue(e, FALSE);
  return TRUE;
}

FX_BOOL CBC_EAN8::RenderDevice(CFX_RenderDevice* device,
                               const CFX_Matrix* matrix,
                               int32_t& e) {
  ((CBC_OneDimWriter*)m_pBCWriter)
      ->RenderDeviceResult(device, matrix, m_renderContents.AsStringC(), e);
  BC_EXCEPTION_CHECK_ReturnValue(e, FALSE);
  return TRUE;
}

FX_BOOL CBC_EAN8::RenderBitmap(CFX_DIBitmap*& pOutBitmap, int32_t& e) {
  ((CBC_OneDimWriter*)m_pBCWriter)
      ->RenderBitmapResult(pOutBitmap, m_renderContents.AsStringC(), e);
  BC_EXCEPTION_CHECK_ReturnValue(e, FALSE);
  return TRUE;
}

CFX_WideString CBC_EAN8::Decode(uint8_t* buf,
                                int32_t width,
                                int32_t height,
                                int32_t& e) {
  CFX_WideString str;
  return str;
}

CFX_WideString CBC_EAN8::Decode(CFX_DIBitmap* pBitmap, int32_t& e) {
  CBC_BufferedImageLuminanceSource source(pBitmap);
  CBC_GlobalHistogramBinarizer binarizer(&source);
  CBC_BinaryBitmap bitmap(&binarizer);
  CFX_ByteString str = m_pBCReader->Decode(&bitmap, 0, e);
  BC_EXCEPTION_CHECK_ReturnValue(e, FX_WSTRC(L""));
  return CFX_WideString::FromUTF8(str.AsStringC());
}