core/fxcodec/codec/icodec_bmpmodule.h

// Copyright 2017 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_ICODEC_BMPMODULE_H_
#define CORE_FXCODEC_CODEC_ICODEC_BMPMODULE_H_

#include "core/fxcrt/fx_system.h"

struct FXBMP_Context;
class CFX_DIBAttribute;

// Virtual interface to avoid linking in a concrete implementation
// if we do not enable this codec.
class ICodec_BmpModule {
 public:
  class Delegate {
   public:
    virtual bool BmpInputImagePositionBuf(uint32_t rcd_pos) = 0;
    virtual void BmpReadScanline(int32_t row_num, uint8_t* row_buf) = 0;
  };

  virtual ~ICodec_BmpModule() {}

  virtual FXBMP_Context* Start() = 0;
  virtual void Finish(FXBMP_Context* pContext) = 0;
  virtual uint32_t GetAvailInput(FXBMP_Context* pContext,
                                 uint8_t** avail_buf_ptr) = 0;
  virtual void Input(FXBMP_Context* pContext,
                     const uint8_t* src_buf,
                     uint32_t src_size) = 0;
  virtual int32_t ReadHeader(FXBMP_Context* pContext,
                             int32_t* width,
                             int32_t* height,
                             bool* tb_flag,
                             int32_t* components,
                             int32_t* pal_num,
                             uint32_t** pal_pp,
                             CFX_DIBAttribute* pAttribute) = 0;
  virtual int32_t LoadImage(FXBMP_Context* pContext) = 0;

  Delegate* GetDelegate() const { return m_pDelegate; }
  void SetDelegate(Delegate* pDelegate) { m_pDelegate = pDelegate; }

 protected:
  Delegate* m_pDelegate;
};

#endif  // CORE_FXCODEC_CODEC_ICODEC_BMPMODULE_H_