| // 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_CFX_IMAGETRANSFORMER_H_ |
| #define CORE_FXGE_DIB_CFX_IMAGETRANSFORMER_H_ |
| |
| #include <memory> |
| |
| #include "core/fxcrt/fx_coordinates.h" |
| #include "core/fxcrt/retain_ptr.h" |
| #include "core/fxcrt/unowned_ptr.h" |
| #include "core/fxge/dib/cfx_bitmapstorer.h" |
| #include "core/fxge/dib/cfx_dibitmap.h" |
| #include "core/fxge/dib/cfx_dibsource.h" |
| |
| class CFX_ImageStretcher; |
| |
| class CFX_ImageTransformer { |
| public: |
| CFX_ImageTransformer(const RetainPtr<CFX_DIBSource>& pSrc, |
| const CFX_Matrix* pMatrix, |
| int flags, |
| const FX_RECT* pClip); |
| ~CFX_ImageTransformer(); |
| |
| bool Continue(PauseIndicatorIface* pPause); |
| |
| const FX_RECT& result() const { return m_result; } |
| RetainPtr<CFX_DIBitmap> DetachBitmap(); |
| |
| private: |
| struct BilinearData { |
| int res_x; |
| int res_y; |
| int src_col_l; |
| int src_row_l; |
| int src_col_r; |
| int src_row_r; |
| int row_offset_l; |
| int row_offset_r; |
| }; |
| |
| struct BicubicData { |
| int res_x; |
| int res_y; |
| int src_col_l; |
| int src_row_l; |
| int src_col_r; |
| int src_row_r; |
| int pos_pixel[8]; |
| int u_w[4]; |
| int v_w[4]; |
| }; |
| |
| struct DownSampleData { |
| int src_col; |
| int src_row; |
| }; |
| |
| struct CalcData { |
| const CFX_DIBitmap* bitmap; |
| const CFX_Matrix& matrix; |
| const uint8_t* buf; |
| uint32_t pitch; |
| }; |
| |
| void CalcMask(const CalcData& cdata); |
| void CalcAlpha(const CalcData& cdata); |
| void CalcMono(const CalcData& cdata, FXDIB_Format format); |
| void CalcColor(const CalcData& cdata, FXDIB_Format format, int Bpp); |
| |
| bool IsBilinear() const { |
| return !(m_Flags & FXDIB_DOWNSAMPLE) && !IsBiCubic(); |
| } |
| bool IsBiCubic() const { return !!(m_Flags & FXDIB_BICUBIC_INTERPOL); } |
| |
| int stretch_width() const { return m_StretchClip.Width(); } |
| int stretch_height() const { return m_StretchClip.Height(); } |
| |
| bool InStretchBounds(int col, int row) const { |
| return col >= 0 && col <= stretch_width() && row >= 0 && |
| row <= stretch_height(); |
| } |
| |
| void AdjustCoords(int* col, int* row) const; |
| |
| void DoBilinearLoop(const CalcData& cdata, |
| int increment, |
| std::function<void(const BilinearData&, uint8_t*)> func); |
| void DoBicubicLoop(const CalcData& cdata, |
| int increment, |
| std::function<void(const BicubicData&, uint8_t*)> func); |
| void DoDownSampleLoop( |
| const CalcData& cdata, |
| int increment, |
| std::function<void(const DownSampleData&, uint8_t*)> func); |
| |
| const RetainPtr<CFX_DIBSource> m_pSrc; |
| UnownedPtr<const CFX_Matrix> const m_pMatrix; |
| const FX_RECT* const m_pClip; |
| FX_RECT m_StretchClip; |
| FX_RECT m_result; |
| CFX_Matrix m_dest2stretch; |
| std::unique_ptr<CFX_ImageStretcher> m_Stretcher; |
| CFX_BitmapStorer m_Storer; |
| const uint32_t m_Flags; |
| int m_Status; |
| }; |
| |
| #endif // CORE_FXGE_DIB_CFX_IMAGETRANSFORMER_H_ |