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_FXCODEC_FLATE_FLATEMODULE_H_ 8 #define CORE_FXCODEC_FLATE_FLATEMODULE_H_ 9 10 #include <memory> 11 12 #include "core/fxcrt/fx_memory_wrappers.h" 13 #include "core/fxcrt/fx_system.h" 14 #include "third_party/base/span.h" 15 16 namespace fxcodec { 17 18 class ScanlineDecoder; 19 20 class FlateModule { 21 public: 22 static std::unique_ptr<ScanlineDecoder> CreateDecoder( 23 pdfium::span<const uint8_t> src_span, 24 int width, 25 int height, 26 int nComps, 27 int bpc, 28 int predictor, 29 int Colors, 30 int BitsPerComponent, 31 int Columns); 32 33 static uint32_t FlateOrLZWDecode( 34 bool bLZW, 35 pdfium::span<const uint8_t> src_span, 36 bool bEarlyChange, 37 int predictor, 38 int Colors, 39 int BitsPerComponent, 40 int Columns, 41 uint32_t estimated_size, 42 std::unique_ptr<uint8_t, FxFreeDeleter>* dest_buf, 43 uint32_t* dest_size); 44 45 static bool Encode(const uint8_t* src_buf, 46 uint32_t src_size, 47 std::unique_ptr<uint8_t, FxFreeDeleter>* dest_buf, 48 uint32_t* dest_size); 49 50 FlateModule() = delete; 51 FlateModule(const FlateModule&) = delete; 52 FlateModule& operator=(const FlateModule&) = delete; 53 }; 54 55 } // namespace fxcodec 56 57 using FlateModule = fxcodec::FlateModule; 58 59 #endif // CORE_FXCODEC_FLATE_FLATEMODULE_H_ 60