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65 lines
2.2 KiB
65 lines
2.2 KiB
// Copyright 2018 PDFium Authors. All rights reserved.
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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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#include "fxbarcode/cbc_eancode.h"
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#include <utility>
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#include "core/fxcrt/fx_memory_wrappers.h"
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#include "fxbarcode/oned/BC_OnedEANWriter.h"
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CBC_EANCode::CBC_EANCode(std::unique_ptr<CBC_OneDimEANWriter> pWriter)
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: CBC_OneCode(std::move(pWriter)) {}
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CBC_EANCode::~CBC_EANCode() = default;
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CBC_OneDimEANWriter* CBC_EANCode::GetOneDimEANWriter() {
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return static_cast<CBC_OneDimEANWriter*>(m_pBCWriter.get());
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}
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bool CBC_EANCode::Encode(WideStringView contents) {
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if (contents.IsEmpty() || contents.GetLength() > kMaxInputLengthBytes)
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return false;
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BCFORMAT format = GetFormat();
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int32_t out_width = 0;
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int32_t out_height = 0;
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m_renderContents = Preprocess(contents);
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ByteString str = m_renderContents.ToUTF8();
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auto* pWriter = GetOneDimEANWriter();
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pWriter->InitEANWriter();
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std::unique_ptr<uint8_t, FxFreeDeleter> data(
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pWriter->Encode(str, format, out_width, out_height));
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return data && pWriter->RenderResult(m_renderContents.AsStringView(),
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data.get(), out_width);
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}
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bool CBC_EANCode::RenderDevice(CFX_RenderDevice* device,
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const CFX_Matrix* matrix) {
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return GetOneDimEANWriter()->RenderDeviceResult(
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device, matrix, m_renderContents.AsStringView());
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}
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WideString CBC_EANCode::Preprocess(WideStringView contents) {
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auto* pWriter = GetOneDimEANWriter();
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WideString encoded_contents = pWriter->FilterContents(contents);
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size_t length = encoded_contents.GetLength();
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size_t max_length = GetMaxLength();
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if (length <= max_length) {
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for (size_t i = 0; i < max_length - length; i++)
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encoded_contents.InsertAtFront(L'0');
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ByteString str = encoded_contents.ToUTF8();
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int32_t checksum = pWriter->CalcChecksum(str);
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str += '0' + checksum;
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encoded_contents = WideString::FromUTF8(str.AsStringView());
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} else {
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encoded_contents = encoded_contents.First(max_length + 1);
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}
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return encoded_contents;
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}
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