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// 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 CORE_SRC_FXGE_DIB_DIB_INT_H_
#define CORE_SRC_FXGE_DIB_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 // CORE_SRC_FXGE_DIB_DIB_INT_H_
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