L_BitmapHasMeaningfulAlpha

#include "l_bitmap.h"

L_LTKRN_API L_BOOL L_BitmapHasMeaningfulAlpha(pBitmap)

/* pointer to the bitmap handle */

Determines whether the bitmap has meaningful alpha channel data.

Parameter	Description
pBitmap	Pointer to the bitmap handle referencing the bitmap to test.

Returns

TRUE	At least one alpha channel value is not equal to 0xFF.
FALSE	All alpha channel values are set to 0xFF or there was an error.

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.

Win32, x64.

See Also

Functions:	L_GetBitmapAlpha, L_SetBitmapAlphaValues, L_SetBitmapAlpha
Topics:	Defining and Using a Bitmap Region
	Implementing Transparency
	Saving a Region
	Raster Image Functions: Using the Alpha Channel

Example

For an example, refer to L_SetBitmapAlpha.