// Copyright 2014 PDFium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
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#ifndef CORE_FXGE_DIB_DIB_INT_H_
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#define CORE_FXGE_DIB_DIB_INT_H_
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#include <stdint.h>
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#include "core/fxcrt/include/fx_coordinates.h"
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#include "core/fxge/include/fx_dib.h"
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class IFX_ScanlineComposer;
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extern const int16_t SDP_Table[513];
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class CPDF_FixedMatrix {
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public:
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CPDF_FixedMatrix(const CFX_Matrix& src, int bits) {
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base = 1 << bits;
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a = FXSYS_round(src.a * base);
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b = FXSYS_round(src.b * base);
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c = FXSYS_round(src.c * base);
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d = FXSYS_round(src.d * base);
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e = FXSYS_round(src.e * base);
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f = FXSYS_round(src.f * base);
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}
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inline void Transform(int x, int y, int& x1, int& y1) {
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x1 = (a * x + c * y + e + base / 2) / base;
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y1 = (b * x + d * y + f + base / 2) / base;
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}
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int a, b, c, d, e, f;
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int base;
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};
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#define FPDF_HUGE_IMAGE_SIZE 60000000
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struct PixelWeight {
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int m_SrcStart;
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int m_SrcEnd;
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int m_Weights[1];
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};
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class CWeightTable {
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public:
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CWeightTable() { m_pWeightTables = nullptr; }
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~CWeightTable() {
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FX_Free(m_pWeightTables);
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m_pWeightTables = nullptr;
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}
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void Calc(int dest_len,
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int dest_min,
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int dest_max,
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int src_len,
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int src_min,
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int src_max,
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int flags);
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PixelWeight* GetPixelWeight(int pixel) {
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return (PixelWeight*)(m_pWeightTables + (pixel - m_DestMin) * m_ItemSize);
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}
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int m_DestMin, m_ItemSize;
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uint8_t* m_pWeightTables;
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};
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class CStretchEngine {
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public:
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CStretchEngine(IFX_ScanlineComposer* pDestBitmap,
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FXDIB_Format dest_format,
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int dest_width,
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int dest_height,
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const FX_RECT& clip_rect,
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const CFX_DIBSource* pSrcBitmap,
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int flags);
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~CStretchEngine();
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FX_BOOL Continue(IFX_Pause* pPause);
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public:
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FXDIB_Format m_DestFormat;
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int m_DestBpp, m_SrcBpp, m_bHasAlpha;
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IFX_ScanlineComposer* m_pDestBitmap;
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int m_DestWidth, m_DestHeight;
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FX_RECT m_DestClip;
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uint8_t* m_pDestScanline;
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uint8_t* m_pDestMaskScanline;
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FX_RECT m_SrcClip;
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const CFX_DIBSource* m_pSource;
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uint32_t* m_pSrcPalette;
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int m_SrcWidth, m_SrcHeight;
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int m_SrcPitch, m_InterPitch;
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int m_ExtraMaskPitch;
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uint8_t* m_pInterBuf;
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uint8_t* m_pExtraAlphaBuf;
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int m_TransMethod;
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int m_Flags;
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CWeightTable m_WeightTable;
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int m_CurRow;
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FX_BOOL StartStretchHorz();
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FX_BOOL ContinueStretchHorz(IFX_Pause* pPause);
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void StretchVert();
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int m_State;
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};
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FX_RECT FXDIB_SwapClipBox(FX_RECT& clip,
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int width,
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int height,
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FX_BOOL bFlipX,
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FX_BOOL bFlipY);
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#endif // CORE_FXGE_DIB_DIB_INT_H_
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