Source code of Windows XP (NT5)
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/****************************************************************************
* * * FILE : SHOWDIB.H * * * * DESCRIPTION : Header/include file for ShowDIB example. * * * ****************************************************************************/
/* Macro to restrict a given value to an upper or lower boundary value */#define BOUND(x,min,max) ((x) < (min) ? (min) : ((x) > (max) ? (max) : (x)))
/* Macro to swap two values */#define SWAP(x,y) ((x)^=(y)^=(x)^=(y))
/* Macro to find the minimum of two values */#define MIN(x,y) (((x) <= (y)) : x ? y)
/* Macros to display/remove hourglass cursor for lengthy operations */#define StartWait() hcurSave = SetCursor(LoadCursor(NULL,IDC_WAIT))
#define EndWait() SetCursor(hcurSave)
#define MINBAND 50 /* Minimum band size used by the program */
#define BANDINCREMENT 20 /* Decrement for band size while trying */
/* to determine optimum band size. */
/* macro to determine if resource is a DIB */#define ISDIB(bft) ((bft) == BFT_BITMAP)
/* Macro to align given value to the closest DWORD (unsigned long ) */#define ALIGNULONG(i) ((i+3)/4*4)
/* Macro to determine to round off the given value to the closest byte */#define WIDTHBYTES(i) ((i+31)/32*4)
#define PALVERSION 0x300
#define MAXPALETTE 256 /* max. # supported palette entries */
/***************** GLOBAL VARIABLES *************************/
extern char achFileName[128]; /* File pathname */extern DWORD dwOffset; /* Current position if DIB file pointer */extern RECT rcClip; /* Current clip rectangle. */extern BOOL fPalColors; /* TRUE if the current DIB's color table */ /* contains palette indexes not rgb values */extern BOOL bDIBToDevice; /* Use SetDIBitsToDevice() to BLT data. */extern BOOL bLegitDraw; /* We have a valid bitmap to draw */extern WORD wTransparent; /* Mode of DC */extern char szAppName[]; /* App. name */extern HPALETTE hpalCurrent; /* Handle to current palette */extern HANDLE hdibCurrent; /* Handle to current memory DIB */extern HBITMAP hbmCurrent; /* Handle to current memory BITMAP */extern HANDLE hbiCurrent; /* Handle to current bitmap info struct */extern DWORD dwStyle; /* Style bits of the App. window */
/***********************************************************//* Declarations of functions used in dib.c module *//***********************************************************/
WORD PaletteSize (VOID FAR * pv);WORD DibNumColors (VOID FAR * pv);HANDLE DibFromBitmap (HBITMAP hbm, DWORD biStyle, WORD biBits, HPALETTE hpal);HBITMAP BitmapFromDib (HANDLE hdib, HPALETTE hpal);
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