L_GetPNGTRNS

#include "l_bitmap.h"

L_INT EXT_FUNCTION L_GetPNGTRNS (pData)

/* pointer to a buffer */

Gets the transparency data used by LEADTOOLS when loading PNG files.

Parameter	Description
pData	Pointer to a buffer to be updated with the transparency data used when loading PNG files.

Returns

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

Comments

This function supports 8-bit PNG images.

To set the transparency data used when saving PNG files, use L_SetPNGTRNS function.

The transparency data obtained by this function is valid for the current thread.

Required DLLs and Libraries

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.

Platforms

Windows 95 / 98 / Me, Windows 2000 / XP, Windows CE.

See Also

Functions:	L_SetPNGTRNS; L_SetBitmapAlpha, L_CreateMaskFromBitmapRgn, L_SetBitmapRgnFromMask
Topics:	Raster Image Functions: Loading Files.
	Loading and Saving Images
	PNG Files and Transparency

Example

/* This example gets PNG transparency data */

L_INT ExampleGetTrns(L_UCHAR * pData)
{
   L_INT nRet;
   nRet  = L_GetPNGTRNS(pData);
   return nRet;
}