1 files changed, 107 insertions, 0 deletions
diff --git a/core/fxge/dib/dib_int.h b/core/fxge/dib/dib_int.h
new file mode 100644
index 0000000000..85888fed50
--- /dev/null
+++ b/core/fxge/dib/dib_int.h
@@ -0,0 +1,107 @@
+// 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_FXGE_DIB_DIB_INT_H_
+#define CORE_FXGE_DIB_DIB_INT_H_
+
+#include <stdint.h>
+
+#include "core/include/fxcrt/fx_coordinates.h"
+#include "core/include/fxge/fx_dib.h"
+
+class IFX_ScanlineComposer;
+
+extern const int16_t SDP_Table[513];
+
+class CPDF_FixedMatrix {
+ public:
+  CPDF_FixedMatrix(const CFX_Matrix& 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() {
+    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;
+  uint8_t* 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;
+  uint8_t* m_pDestScanline;
+  uint8_t* 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;
+};
+
+FX_RECT FXDIB_SwapClipBox(FX_RECT& clip,
+                          int width,
+                          int height,
+                          FX_BOOL bFlipX,
+                          FX_BOOL bFlipY);
+
+#endif  // CORE_FXGE_DIB_DIB_INT_H_