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// 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(IFX_PauseIndicator* pPause);
const FX_RECT& result() const { return m_result; }
RetainPtr<CFX_DIBitmap> DetachBitmap();
private:
struct CalcData {
const CFX_DIBitmap* bitmap;
const CFX_Matrix& matrix;
const uint8_t* buf;
int pitch;
};
void CalcMask(const CalcData& cdata);
void CalcAlpha(const CalcData& cdata);
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;
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_
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