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 14 class CCodec_ScanlineDecoder; 15 class CPDF_Dictionary; 16 17 // Indexed by 8-bit char code, contains unicode code points. 18 extern const uint16_t PDFDocEncoding[256]; 19 20 CFX_ByteString PDF_NameDecode(const CFX_ByteStringC& orig); 21 CFX_ByteString PDF_NameDecode(const CFX_ByteString& orig); 22 CFX_ByteString PDF_NameEncode(const CFX_ByteString& orig); 23 CFX_ByteString PDF_EncodeString(const CFX_ByteString& src, bool bHex = false); 24 CFX_WideString PDF_DecodeText(const uint8_t* pData, uint32_t size); 25 CFX_WideString PDF_DecodeText(const CFX_ByteString& bstr); 26 CFX_ByteString PDF_EncodeText(const FX_WCHAR* pString, int len = -1); 27 CFX_ByteString PDF_EncodeText(const CFX_WideString& str); 28 29 bool 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. 37 bool PngEncode(const uint8_t* src_buf, 38 uint32_t src_size, 39 uint8_t** dest_buf, 40 uint32_t* dest_size); 41 42 uint32_t FlateDecode(const uint8_t* src_buf, 43 uint32_t src_size, 44 uint8_t*& dest_buf, 45 uint32_t& dest_size); 46 uint32_t RunLengthDecode(const uint8_t* src_buf, 47 uint32_t src_size, 48 uint8_t*& dest_buf, 49 uint32_t& dest_size); 50 51 std::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 58 std::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. 68 uint32_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. 73 uint32_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. 78 uint32_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); 85 bool 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
