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_CODEC_CCODEC_SCANLINEDECODER_H_
8 #define CORE_FXCODEC_CODEC_CCODEC_SCANLINEDECODER_H_
9 
10 #include "core/fxcrt/include/fx_system.h"
11 
12 class IFX_Pause;
13 
14 class CCodec_ScanlineDecoder {
15  public:
16   CCodec_ScanlineDecoder();
17   virtual ~CCodec_ScanlineDecoder();
18 
19   const uint8_t* GetScanline(int line);
20   FX_BOOL SkipToScanline(int line, IFX_Pause* pPause);
21 
GetWidth()22   int GetWidth() { return m_OutputWidth; }
GetHeight()23   int GetHeight() { return m_OutputHeight; }
CountComps()24   int CountComps() { return m_nComps; }
GetBPC()25   int GetBPC() { return m_bpc; }
26 
27   virtual uint32_t GetSrcOffset() = 0;
28 
29  protected:
30   virtual FX_BOOL v_Rewind() = 0;
31   virtual uint8_t* v_GetNextLine() = 0;
32 
33   uint8_t* ReadNextLine();
34 
35   int m_OrigWidth;
36   int m_OrigHeight;
37   int m_OutputWidth;
38   int m_OutputHeight;
39   int m_nComps;
40   int m_bpc;
41   uint32_t m_Pitch;
42   int m_NextLine;
43   uint8_t* m_pLastScanline;
44 };
45 
46 #endif  // CORE_FXCODEC_CODEC_CCODEC_SCANLINEDECODER_H_
47