L_RotateBitmapViewPerspective
#include "l_bitmap.h"
L_INT EXT_FUNCTION L_RotateBitmapViewPerspective(pBitmap, nAngle)
pBITMAPHANDLE pBitmap; |
/* pointer to the bitmap handle */ |
L_INT nAngle; |
/* degrees of rotation */ |
Rotates an image by changing the bitmap's view perspective. This function is available in the Document/Medical Toolkits.
Parameter |
Description |
pBitmap |
Pointer to the bitmap handle. |
nAngle |
Degrees of rotation. Valid values +-90, +-180, +-270, or +-360. Positive values are clockwise; negative values are counterclockwise. |
Returns
SUCCESS |
The function was successful. |
< 1 |
An error occurred. Refer to Return Codes. |
Comments
This function achieves fast rotation by changing only the view perspective. After using this function, you can reverse the result by restoring the original View Perspective.
Some functions must account for the view perspective. For general information about view perspectives, refer to Accounting for View Perspective.
Required DLLs and Libraries
LTKRN For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application. |
Platforms
Windows 95 / 98 / Me, Windows 2000 / XP, Windows CE.
See Also
Functions: |
L_RotateBitmapFine, L_RotateBitmap, L_ShearBitmap, L_FlipBitmap, L_ReverseBitmap, L_DlgRotate |
Topics: |
Example
/* This example rotates the bitmap's ViewPerspective 90 degrees */
BITMAPHANDLE LeadBitmap; /* Bitmap handle that holds the bitmap */
L_LoadBitmap(TEXT("IMAGE1.CMP"), &LeadBitmap, sizeof(BITMAPHANDLE), 0, ORDER_BGR, NULL, NULL);
L_RotateBitmapViewPerspective ( &LeadBitmap, 90 );