1// Copyright 2016 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#ifndef CORE_FPDFAPI_PARSER_FPDF_PARSER_DECODE_H_
8#define CORE_FPDFAPI_PARSER_FPDF_PARSER_DECODE_H_
9
10#include <memory>
11
12#include "core/fxcrt/fx_basic.h"
13
14class CCodec_ScanlineDecoder;
15class CPDF_Dictionary;
16
17// Indexed by 8-bit char code, contains unicode code points.
18extern const uint16_t PDFDocEncoding[256];
19
20CFX_ByteString PDF_NameDecode(const CFX_ByteStringC& orig);
21CFX_ByteString PDF_NameDecode(const CFX_ByteString& orig);
22CFX_ByteString PDF_NameEncode(const CFX_ByteString& orig);
23CFX_ByteString PDF_EncodeString(const CFX_ByteString& src, bool bHex = false);
24CFX_WideString PDF_DecodeText(const uint8_t* pData, uint32_t size);
25CFX_WideString PDF_DecodeText(const CFX_ByteString& bstr);
26CFX_ByteString PDF_EncodeText(const FX_WCHAR* pString, int len = -1);
27CFX_ByteString PDF_EncodeText(const CFX_WideString& str);
28
29bool FlateEncode(const uint8_t* src_buf,
30                 uint32_t src_size,
31                 uint8_t** dest_buf,
32                 uint32_t* dest_size);
33
34// This used to have more parameters like the predictor and bpc, but there was
35// only one caller, so the interface has been simplified, the values are hard
36// coded, and dead code has been removed.
37bool PngEncode(const uint8_t* src_buf,
38               uint32_t src_size,
39               uint8_t** dest_buf,
40               uint32_t* dest_size);
41
42uint32_t FlateDecode(const uint8_t* src_buf,
43                     uint32_t src_size,
44                     uint8_t*& dest_buf,
45                     uint32_t& dest_size);
46uint32_t RunLengthDecode(const uint8_t* src_buf,
47                         uint32_t src_size,
48                         uint8_t*& dest_buf,
49                         uint32_t& dest_size);
50
51std::unique_ptr<CCodec_ScanlineDecoder> FPDFAPI_CreateFaxDecoder(
52    const uint8_t* src_buf,
53    uint32_t src_size,
54    int width,
55    int height,
56    const CPDF_Dictionary* pParams);
57
58std::unique_ptr<CCodec_ScanlineDecoder> FPDFAPI_CreateFlateDecoder(
59    const uint8_t* src_buf,
60    uint32_t src_size,
61    int width,
62    int height,
63    int nComps,
64    int bpc,
65    const CPDF_Dictionary* pParams);
66
67// Public for testing.
68uint32_t A85Decode(const uint8_t* src_buf,
69                   uint32_t src_size,
70                   uint8_t*& dest_buf,
71                   uint32_t& dest_size);
72// Public for testing.
73uint32_t HexDecode(const uint8_t* src_buf,
74                   uint32_t src_size,
75                   uint8_t*& dest_buf,
76                   uint32_t& dest_size);
77// Public for testing.
78uint32_t FPDFAPI_FlateOrLZWDecode(bool bLZW,
79                                  const uint8_t* src_buf,
80                                  uint32_t src_size,
81                                  CPDF_Dictionary* pParams,
82                                  uint32_t estimated_size,
83                                  uint8_t*& dest_buf,
84                                  uint32_t& dest_size);
85bool PDF_DataDecode(const uint8_t* src_buf,
86                    uint32_t src_size,
87                    const CPDF_Dictionary* pDict,
88                    uint8_t*& dest_buf,
89                    uint32_t& dest_size,
90                    CFX_ByteString& ImageEncoding,
91                    CPDF_Dictionary*& pImageParms,
92                    uint32_t estimated_size,
93                    bool bImageAcc);
94
95#endif  // CORE_FPDFAPI_PARSER_FPDF_PARSER_DECODE_H_
96