Source code of Windows XP (NT5)
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/****************************************************************************
* * iaverage.h * * Image averaging * * Copyright (c) 1992-1994 Microsoft Corporation. All Rights Reserved. * ***************************************************************************/
#ifndef _INC_AVERAGE
#define _INC_AVERAGE
#ifdef __cplusplus
extern "C" { /* Assume C declarations for C++ */#endif /* __cplusplus */
#ifndef RC_INVOKED
#pragma pack(1) /* Assume byte packing throughout */
#endif /* RC_INVOKED */
#ifndef RC_INVOKED
// -------------------------
// Structures
// -------------------------
typedef struct tagiAverage { BITMAPINFO bi; // Copy of source format
RGBQUAD pe[256]; // Copy of color table
LPBYTE lpInverseMap; // rgb15 to palette index
LPWORD lpRGB; // accumulator
WORD iCount; // Count of images accumulated
} IAVERAGE, *PIAVERAGE, FAR *LPIAVERAGE;
BOOL iaverageInit (LPIAVERAGE FAR * lppia, LPBITMAPINFO lpbi, HPALETTE hPal);BOOL iaverageFini (LPIAVERAGE lpia);BOOL iaverageZero (LPIAVERAGE lpia);BOOL iaverageSum (LPIAVERAGE lpia, LPVOID lpBits);BOOL iaverageDivide (LPIAVERAGE lpia, LPVOID lpBits);BOOL CrunchDIB( LPIAVERAGE lpia, LPBITMAPINFOHEADER lpbiSrc, // BITMAPINFO of source
LPVOID lpSrc, // input bits to crunch
LPBITMAPINFOHEADER lpbiDst, // BITMAPINFO of dest
LPVOID lpDst); // output bits to crunch
#endif /* RC_INVOKED */
#ifndef RC_INVOKED
#pragma pack() /* Revert to default packing */
#endif /* RC_INVOKED */
#ifdef __cplusplus
} /* End of extern "C" { */#endif /* __cplusplus */
#endif /* INC_AVERAGE */
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