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/fx_system.h" 11 12 class IFX_PauseIndicator; 13 14 class CCodec_ScanlineDecoder { 15 public: 16 CCodec_ScanlineDecoder(); 17 CCodec_ScanlineDecoder(int nOrigWidth, 18 int nOrigHeight, 19 int nOutputWidth, 20 int nOutputHeight, 21 int nComps, 22 int nBpc, 23 uint32_t nPitch); 24 virtual ~CCodec_ScanlineDecoder(); 25 26 const uint8_t* GetScanline(int line); 27 bool SkipToScanline(int line, IFX_PauseIndicator* pPause); 28 29 int GetWidth() { return m_OutputWidth; } 30 int GetHeight() { return m_OutputHeight; } 31 int CountComps() { return m_nComps; } 32 int GetBPC() { return m_bpc; } 33 34 virtual uint32_t GetSrcOffset() = 0; 35 36 protected: 37 virtual bool v_Rewind() = 0; 38 virtual uint8_t* v_GetNextLine() = 0; 39 40 uint8_t* ReadNextLine(); 41 42 int m_OrigWidth; 43 int m_OrigHeight; 44 int m_OutputWidth; 45 int m_OutputHeight; 46 int m_nComps; 47 int m_bpc; 48 uint32_t m_Pitch; 49 int m_NextLine; 50 uint8_t* m_pLastScanline; 51 }; 52 53 #endif // CORE_FXCODEC_CODEC_CCODEC_SCANLINEDECODER_H_ 54
