| // 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_SCANLINEDECODER_H_ |
| #define CORE_FXCODEC_SCANLINEDECODER_H_ |
| |
| #include <stdint.h> |
| |
| #include "core/fxcrt/raw_span.h" |
| #include "core/fxcrt/span.h" |
| |
| class PauseIndicatorIface; |
| |
| namespace fxcodec { |
| |
| class ScanlineDecoder { |
| public: |
| ScanlineDecoder(); |
| ScanlineDecoder(int nOrigWidth, |
| int nOrigHeight, |
| int nOutputWidth, |
| int nOutputHeight, |
| int nComps, |
| int nBpc, |
| uint32_t nPitch); |
| virtual ~ScanlineDecoder(); |
| |
| pdfium::span<const uint8_t> GetScanline(int line); |
| bool SkipToScanline(int line, PauseIndicatorIface* pPause); |
| |
| int GetWidth() const { return m_OutputWidth; } |
| int GetHeight() const { return m_OutputHeight; } |
| int CountComps() const { return m_nComps; } |
| int GetBPC() const { return m_bpc; } |
| |
| virtual uint32_t GetSrcOffset() = 0; |
| |
| protected: |
| virtual bool Rewind() = 0; |
| virtual pdfium::span<uint8_t> GetNextLine() = 0; |
| |
| int m_OrigWidth; |
| int m_OrigHeight; |
| int m_OutputWidth; |
| int m_OutputHeight; |
| int m_nComps; |
| int m_bpc; |
| uint32_t m_Pitch; |
| int m_NextLine = -1; |
| pdfium::raw_span<uint8_t> m_pLastScanline; |
| }; |
| |
| } // namespace fxcodec |
| |
| using ScanlineDecoder = fxcodec::ScanlineDecoder; |
| |
| #endif // CORE_FXCODEC_SCANLINEDECODER_H_ |