1 files changed, 46 insertions, 0 deletions
diff --git a/core/fxcodec/codec/ccodec_scanlinedecoder.h b/core/fxcodec/codec/ccodec_scanlinedecoder.h
new file mode 100644
index 0000000000..cd18c8d76e
--- /dev/null
+++ b/core/fxcodec/codec/ccodec_scanlinedecoder.h
@@ -0,0 +1,46 @@
+// Copyright 2016 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_CCODEC_SCANLINEDECODER_H_
+#define CORE_FXCODEC_CODEC_CCODEC_SCANLINEDECODER_H_
+
+#include "core/fxcrt/include/fx_system.h"
+
+class IFX_Pause;
+
+class CCodec_ScanlineDecoder {
+ public:
+  CCodec_ScanlineDecoder();
+  virtual ~CCodec_ScanlineDecoder();
+
+  const uint8_t* GetScanline(int line);
+  FX_BOOL SkipToScanline(int line, IFX_Pause* pPause);
+
+  int GetWidth() { return m_OutputWidth; }
+  int GetHeight() { return m_OutputHeight; }
+  int CountComps() { return m_nComps; }
+  int GetBPC() { return m_bpc; }
+
+  virtual uint32_t GetSrcOffset() = 0;
+
+ protected:
+  virtual FX_BOOL v_Rewind() = 0;
+  virtual uint8_t* v_GetNextLine() = 0;
+
+  uint8_t* ReadNextLine();
+
+  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;
+  uint8_t* m_pLastScanline;
+};
+
+#endif  // CORE_FXCODEC_CODEC_CCODEC_SCANLINEDECODER_H_