1 // Copyright 2018 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
7 #include "fxbarcode/cbc_eancode.h"
8
9 #include <utility>
10
11 #include "core/fxcrt/fx_memory_wrappers.h"
12 #include "fxbarcode/oned/BC_OnedEANWriter.h"
13
CBC_EANCode(std::unique_ptr<CBC_OneDimEANWriter> pWriter)14 CBC_EANCode::CBC_EANCode(std::unique_ptr<CBC_OneDimEANWriter> pWriter)
15 : CBC_OneCode(std::move(pWriter)) {}
16
17 CBC_EANCode::~CBC_EANCode() = default;
18
GetOneDimEANWriter()19 CBC_OneDimEANWriter* CBC_EANCode::GetOneDimEANWriter() {
20 return static_cast<CBC_OneDimEANWriter*>(m_pBCWriter.get());
21 }
22
Encode(WideStringView contents)23 bool CBC_EANCode::Encode(WideStringView contents) {
24 if (contents.IsEmpty() || contents.GetLength() > kMaxInputLengthBytes)
25 return false;
26
27 BCFORMAT format = GetFormat();
28 int32_t out_width = 0;
29 int32_t out_height = 0;
30 m_renderContents = Preprocess(contents);
31 ByteString str = m_renderContents.ToUTF8();
32 auto* pWriter = GetOneDimEANWriter();
33 pWriter->InitEANWriter();
34 std::unique_ptr<uint8_t, FxFreeDeleter> data(
35 pWriter->Encode(str, format, out_width, out_height));
36 return data && pWriter->RenderResult(m_renderContents.AsStringView(),
37 data.get(), out_width);
38 }
39
RenderDevice(CFX_RenderDevice * device,const CFX_Matrix * matrix)40 bool CBC_EANCode::RenderDevice(CFX_RenderDevice* device,
41 const CFX_Matrix* matrix) {
42 return GetOneDimEANWriter()->RenderDeviceResult(
43 device, matrix, m_renderContents.AsStringView());
44 }
45
Preprocess(WideStringView contents)46 WideString CBC_EANCode::Preprocess(WideStringView contents) {
47 auto* pWriter = GetOneDimEANWriter();
48 WideString encoded_contents = pWriter->FilterContents(contents);
49 size_t length = encoded_contents.GetLength();
50 size_t max_length = GetMaxLength();
51 if (length <= max_length) {
52 for (size_t i = 0; i < max_length - length; i++)
53 encoded_contents.InsertAtFront(L'0');
54
55 ByteString str = encoded_contents.ToUTF8();
56 int32_t checksum = pWriter->CalcChecksum(str);
57 str += '0' + checksum;
58 encoded_contents = WideString::FromUTF8(str.AsStringView());
59 } else {
60 encoded_contents = encoded_contents.First(max_length + 1);
61 }
62
63 return encoded_contents;
64 }
65