60 lines
1.5 KiB
C++
60 lines
1.5 KiB
C++
// Copyright 2016 The PDFium Authors
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
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#ifndef CORE_FXCODEC_SCANLINEDECODER_H_
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#define CORE_FXCODEC_SCANLINEDECODER_H_
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#include <stdint.h>
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#include "third_party/base/span.h"
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class PauseIndicatorIface;
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namespace fxcodec {
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class ScanlineDecoder {
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public:
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ScanlineDecoder();
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ScanlineDecoder(int nOrigWidth,
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int nOrigHeight,
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int nOutputWidth,
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int nOutputHeight,
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int nComps,
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int nBpc,
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uint32_t nPitch);
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virtual ~ScanlineDecoder();
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pdfium::span<const uint8_t> GetScanline(int line);
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bool SkipToScanline(int line, PauseIndicatorIface* pPause);
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int GetWidth() const { return m_OutputWidth; }
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int GetHeight() const { return m_OutputHeight; }
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int CountComps() const { return m_nComps; }
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int GetBPC() const { return m_bpc; }
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virtual uint32_t GetSrcOffset() = 0;
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protected:
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virtual bool Rewind() = 0;
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virtual pdfium::span<uint8_t> GetNextLine() = 0;
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int m_OrigWidth;
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int m_OrigHeight;
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int m_OutputWidth;
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int m_OutputHeight;
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int m_nComps;
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int m_bpc;
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uint32_t m_Pitch;
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int m_NextLine = -1;
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pdfium::span<uint8_t> m_pLastScanline;
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};
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} // namespace fxcodec
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using ScanlineDecoder = fxcodec::ScanlineDecoder;
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#endif // CORE_FXCODEC_SCANLINEDECODER_H_
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