Calcbitmapsize - Texas Instruments TI-89 Developer's Manual

Appendix A: System Routines — Windows

CalcBitmapSize

Declaration: WORD CalcBitmapSize (BITMAP * bitmapPtr )
Category(ies): Windows
Description: Calculate a BITMAP size given a pointer to a BITMAP structure.
Inputs: bitmapPtr — Pointer to BITMAP structure.
Outputs: Size in bytes of a BITMAP pointed to by bitmapPtr.
typedef struct {
}
Assumptions: Compare this routine with WinBitmapSize and WinBitmapSizeExt which
compute the size of a BITMAP if it were pulled out of a given window.
None
Side Effects:
Availability: On AMS 2.00 and higher.
TI-89 / TI-92 Plus
Differences: None
See Also: WinBitmapSize, WinBitmapSizeExt, WinGetBitmap, WinPutBitmap
Example:
/* Return HANDLE of the copy of a BITMAP or H_NULL if not enough memory */
HANDLE BitmapCopy( BITMAP *bPtr )
{ HANDLE hCopy;
WORD size = CalcBitmapSize( bPtr );
if (hCopy = HeapAlloc( size ))
memcpy( HeapDeref(hCopy), bPtr, size );
return hCopy;
}
TI-89 / TI-92 Plus Developer Guide
WORD NumRows;
WORD NumCols;
BYTE Data[1];
BITMAP;
Not for Distribution
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Beta Version January 26, 2001