| // Copyright 2014 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 _DIB_INT_H_ |
| #define _DIB_INT_H_ |
| |
| class CPDF_FixedMatrix |
| { |
| public: |
| CPDF_FixedMatrix(const CFX_AffineMatrix& src, int bits) |
| { |
| base = 1 << bits; |
| a = FXSYS_round(src.a * base); |
| b = FXSYS_round(src.b * base); |
| c = FXSYS_round(src.c * base); |
| d = FXSYS_round(src.d * base); |
| e = FXSYS_round(src.e * base); |
| f = FXSYS_round(src.f * base); |
| } |
| inline void Transform(int x, int y, int& x1, int& y1) |
| { |
| x1 = (a * x + c * y + e + base / 2) / base; |
| y1 = (b * x + d * y + f + base / 2) / base; |
| } |
| int a, b, c, d, e, f; |
| int base; |
| }; |
| #define FPDF_HUGE_IMAGE_SIZE 60000000 |
| struct PixelWeight { |
| int m_SrcStart; |
| int m_SrcEnd; |
| int m_Weights[1]; |
| }; |
| class CWeightTable |
| { |
| public: |
| CWeightTable() |
| { |
| m_pWeightTables = NULL; |
| } |
| ~CWeightTable() |
| { |
| if(m_pWeightTables) { |
| FX_Free(m_pWeightTables); |
| } |
| m_pWeightTables = NULL; |
| } |
| void 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) |
| { |
| return (PixelWeight*)(m_pWeightTables + (pixel - m_DestMin) * m_ItemSize); |
| } |
| int m_DestMin, m_ItemSize; |
| FX_LPBYTE m_pWeightTables; |
| }; |
| class CStretchEngine |
| { |
| public: |
| CStretchEngine(IFX_ScanlineComposer* pDestBitmap, FXDIB_Format dest_format, |
| int dest_width, int dest_height, const FX_RECT& clip_rect, |
| const CFX_DIBSource* pSrcBitmap, int flags); |
| ~CStretchEngine(); |
| FX_BOOL Continue(IFX_Pause* pPause); |
| public: |
| FXDIB_Format m_DestFormat; |
| int m_DestBpp, m_SrcBpp, m_bHasAlpha; |
| IFX_ScanlineComposer* m_pDestBitmap; |
| int m_DestWidth, m_DestHeight; |
| FX_RECT m_DestClip; |
| FX_LPBYTE m_pDestScanline; |
| FX_LPBYTE m_pDestMaskScanline; |
| FX_RECT m_SrcClip; |
| const CFX_DIBSource* m_pSource; |
| FX_DWORD* m_pSrcPalette; |
| int m_SrcWidth, m_SrcHeight; |
| int m_SrcPitch, m_InterPitch; |
| int m_ExtraMaskPitch; |
| unsigned char* m_pInterBuf; |
| unsigned char* m_pExtraAlphaBuf; |
| int m_TransMethod; |
| int m_Flags; |
| CWeightTable m_WeightTable; |
| int m_CurRow; |
| FX_BOOL StartStretchHorz(); |
| FX_BOOL ContinueStretchHorz(IFX_Pause* pPause); |
| void StretchVert(); |
| int m_State; |
| }; |
| |
| #endif // _DIB_INT_H_ |