1 // Copyright 2016 The PDFium Authors 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_FXCODEC_FAX_FAXMODULE_H_ 8 #define CORE_FXCODEC_FAX_FAXMODULE_H_ 9 10 #include <stdint.h> 11 12 #include <memory> 13 14 #include "build/build_config.h" 15 #include "core/fxcrt/span.h" 16 17 #if BUILDFLAG(IS_WIN) 18 #include "core/fxcrt/data_vector.h" 19 #include "core/fxcrt/retain_ptr.h" 20 #endif 21 22 class CFX_DIBBase; 23 24 namespace fxcodec { 25 26 class ScanlineDecoder; 27 28 class FaxModule { 29 public: 30 static std::unique_ptr<ScanlineDecoder> CreateDecoder( 31 pdfium::span<const uint8_t> src_span, 32 int width, 33 int height, 34 int K, 35 bool EndOfLine, 36 bool EncodedByteAlign, 37 bool BlackIs1, 38 int Columns, 39 int Rows); 40 41 // Return the ending bit position. 42 static int FaxG4Decode(pdfium::span<const uint8_t> src_buf, 43 int starting_bitpos, 44 int width, 45 int height, 46 int pitch, 47 uint8_t* dest_buf); 48 49 #if BUILDFLAG(IS_WIN) 50 // `src` must have a BPP value of 1. 51 static DataVector<uint8_t> FaxEncode(RetainPtr<const CFX_DIBBase> src); 52 #endif // BUILDFLAG(IS_WIN) 53 54 FaxModule() = delete; 55 FaxModule(const FaxModule&) = delete; 56 FaxModule& operator=(const FaxModule&) = delete; 57 }; 58 59 } // namespace fxcodec 60 61 using FaxModule = fxcodec::FaxModule; 62 63 #endif // CORE_FXCODEC_FAX_FAXMODULE_H_ 64