LPlayBack::GetUpdateRect

#include "ltwrappr.h"

virtual L_INT LPlayBack::GetUpdateRect(prcUpdate, bClear)

LPRECT prcUpdate;	/* address of a RECT structure */
L_BOOL bClear;	/* flag that indicates whether to clear the rectangle */

Gets the updated rectangle of the target bitmap during an animation playback. The rectangle uses bitmap coordinates, and it is cumulative.

Parameter	Description
prcUpdate	Address of the RECT structure to be updated with the coordinates of the updated rectangle
bClear	Flag that indicates whether to clear the rectangle. Possible values are:
	Value	Meaning
	TRUE	Clear the rectangle.
	FALSE	Do not clear the rectangle.

Returns

SUCCESS	The function was successful.
< 1	An error occurred. Refer to Return Codes.

Comments

You usually call this function after the following states, which you can get with the LPlayBack::GetState function:

Value	Meaning
PLAYSTATE_POSTCLEAR	[0x0001] Indicates that the target bitmap has been cleared.
PLAYSTATE_POSTRENDER	[0x0003] Indicates that an image has been rendered to the target bitmap.
PLAYSTATE_POSTDISPOSE	[0x0005] Indicates that the current image has been disposed of. The index is incremented after processing this state.

This function uses bitmap coordinates to specify the update rectangle. Therefore, you must account for the bitmap's view perspective. For more information, refer to Accounting for View Perspective.

Required DLLs and Libraries

LTDIS
LTFIL

For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.

Functions:	Class Members
Topics:	Raster Image Functions: Creating and Maintaining Lists of Images
	Implementing Animation