| // Copyright 2017 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_FXGE_DIB_CSTRETCHENGINE_H_ |
| #define CORE_FXGE_DIB_CSTRETCHENGINE_H_ |
| |
| #include <vector> |
| |
| #include "core/fxcrt/fx_coordinates.h" |
| #include "core/fxcrt/retain_ptr.h" |
| #include "core/fxcrt/unowned_ptr.h" |
| #include "core/fxge/fx_dib.h" |
| |
| class PauseIndicatorIface; |
| class ScanlineComposerIface; |
| |
| class CStretchEngine { |
| public: |
| CStretchEngine(ScanlineComposerIface* pDestBitmap, |
| FXDIB_Format dest_format, |
| int dest_width, |
| int dest_height, |
| const FX_RECT& clip_rect, |
| const RetainPtr<CFX_DIBSource>& pSrcBitmap, |
| int flags); |
| ~CStretchEngine(); |
| |
| bool Continue(PauseIndicatorIface* pPause); |
| |
| bool StartStretchHorz(); |
| bool ContinueStretchHorz(PauseIndicatorIface* pPause); |
| void StretchVert(); |
| |
| class CWeightTable { |
| public: |
| CWeightTable(); |
| ~CWeightTable(); |
| |
| bool Calc(int dest_len, |
| int dest_min, |
| int dest_max, |
| int src_len, |
| int src_min, |
| int src_max, |
| int flags); |
| PixelWeight* GetPixelWeight(int pixel) const; |
| int* GetValueFromPixelWeight(PixelWeight* pWeight, int index) const; |
| size_t GetPixelWeightSize() const; |
| |
| private: |
| int m_DestMin; |
| int m_ItemSize; |
| std::vector<uint8_t> m_WeightTables; |
| size_t m_dwWeightTablesSize; |
| }; |
| |
| enum class State : uint8_t { kInitial, kHorizontal, kVertical }; |
| |
| enum class TransformMethod : uint8_t { |
| k1BppTo8Bpp, |
| k1BppToManyBpp, |
| k8BppTo8Bpp, |
| k8BppTo8BppWithAlpha, |
| k8BppToManyBpp, |
| k8BppToManyBppWithAlpha, |
| kManyBpptoManyBpp, |
| kManyBpptoManyBppWithAlpha |
| }; |
| |
| const FXDIB_Format m_DestFormat; |
| const int m_DestBpp; |
| const int m_SrcBpp; |
| const int m_bHasAlpha; |
| RetainPtr<CFX_DIBSource> const m_pSource; |
| const uint32_t* m_pSrcPalette; |
| const int m_SrcWidth; |
| const int m_SrcHeight; |
| UnownedPtr<ScanlineComposerIface> const m_pDestBitmap; |
| const int m_DestWidth; |
| const int m_DestHeight; |
| const FX_RECT m_DestClip; |
| std::vector<uint8_t> m_DestScanline; |
| std::vector<uint8_t> m_DestMaskScanline; |
| std::vector<uint8_t> m_InterBuf; |
| std::vector<uint8_t> m_ExtraAlphaBuf; |
| FX_RECT m_SrcClip; |
| int m_InterPitch; |
| int m_ExtraMaskPitch; |
| int m_Flags; |
| TransformMethod m_TransMethod; |
| State m_State = State::kInitial; |
| int m_CurRow; |
| CWeightTable m_WeightTable; |
| }; |
| |
| #endif // CORE_FXGE_DIB_CSTRETCHENGINE_H_ |