core/fxcodec/codec/ccodec_jpegmodule.h

// Copyright 2016 PDFium Authors. All rights reserved.
// 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_CODEC_CCODEC_JPEGMODULE_H_
#define CORE_FXCODEC_CODEC_CCODEC_JPEGMODULE_H_

#include "core/fxcrt/include/fx_system.h"

class CCodec_ScanlineDecoder;
class CFX_DIBSource;
struct FXJPEG_Context;

#ifdef PDF_ENABLE_XFA
class CFX_DIBAttribute;
#endif  // PDF_ENABLE_XFA

class CCodec_JpegModule {
 public:
  CCodec_JpegModule() {}
  CCodec_ScanlineDecoder* CreateDecoder(const uint8_t* src_buf,
                                        uint32_t src_size,
                                        int width,
                                        int height,
                                        int nComps,
                                        FX_BOOL ColorTransform);
  FX_BOOL LoadInfo(const uint8_t* src_buf,
                   uint32_t src_size,
                   int& width,
                   int& height,
                   int& num_components,
                   int& bits_per_components,
                   FX_BOOL& color_transform,
                   uint8_t** icc_buf_ptr = nullptr,
                   uint32_t* icc_length = nullptr);
  FX_BOOL Encode(const CFX_DIBSource* pSource,
                 uint8_t*& dest_buf,
                 FX_STRSIZE& dest_size,
                 int quality = 75,
                 const uint8_t* icc_buf = nullptr,
                 uint32_t icc_length = 0);
  FXJPEG_Context* Start();
  void Finish(FXJPEG_Context* pContext);
  void Input(FXJPEG_Context* pContext,
             const uint8_t* src_buf,
             uint32_t src_size);

#ifndef PDF_ENABLE_XFA
  int ReadHeader(FXJPEG_Context* pContext,
                 int* width,
                 int* height,
                 int* nComps);
#else   // PDF_ENABLE_XFA
  int ReadHeader(FXJPEG_Context* pContext,
                 int* width,
                 int* height,
                 int* nComps,
                 CFX_DIBAttribute* pAttribute);
#endif  // PDF_ENABLE_XFA

  int StartScanline(FXJPEG_Context* pContext, int down_scale);
  FX_BOOL ReadScanline(FXJPEG_Context* pContext, uint8_t* dest_buf);
  uint32_t GetAvailInput(FXJPEG_Context* pContext, uint8_t** avail_buf_ptr);
};

#endif  // CORE_FXCODEC_CODEC_CCODEC_JPEGMODULE_H_