faxmodule.h

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// Copyright 2016 The PDFium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
 
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
#ifndef CORE_FXCODEC_FAX_FAXMODULE_H_
#define CORE_FXCODEC_FAX_FAXMODULE_H_
 
#include <stdint.h>
 
#include <memory>
 
#include "build/build_config.h"
#include "core/fxcrt/span.h"
 
#if BUILDFLAG(IS_WIN)
#include "core/fxcrt/data_vector.h"
#include "core/fxcrt/retain_ptr.h"
#endif
 
class CFX_DIBBase;
 
namespace fxcodec {
 
class ScanlineDecoder;
 
class FaxModule {
 public:
  static std::unique_ptr<ScanlineDecoder> CreateDecoder(
      pdfium::span<const uint8_t> src_span,
      int width,
      int height,
      int K,
      bool EndOfLine,
      bool EncodedByteAlign,
      bool BlackIs1,
      int Columns,
      int Rows);
 
  // Return the ending bit position.
  static int FaxG4Decode(pdfium::span<const uint8_t> src_buf,
                         int starting_bitpos,
                         int width,
                         int height,
                         int pitch,
                         uint8_t* dest_buf);
 
#if BUILDFLAG(IS_WIN)
  // `src` must have a BPP value of 1.
  static DataVector<uint8_t> FaxEncode(RetainPtr<const CFX_DIBBase> src);
#endif  // BUILDFLAG(IS_WIN)
 
  FaxModule() = delete;
  FaxModule(const FaxModule&) = delete;
  FaxModule& operator=(const FaxModule&) = delete;
};
 
}  // namespace fxcodec
 
using FaxModule = fxcodec::FaxModule;
 
#endif  // CORE_FXCODEC_FAX_FAXMODULE_H_