L_SetPNGTRNS

#include "l_bitmap.h"

L_LTFIL_API L_INT L_SetPNGTRNS (pData, uSize)

L_UCHAR * pData;	/* pointer to a buffer */
L_UINT uSize;	/* size of the buffer pointed by pData */

Sets the transparency data used by LEADTOOLS when saving PNG files.

Parameter	Description
pData	Pointer to a buffer that contains the transparency data to be used for saving PNG files.
uSize	Size in bytes, of the buffer pointed to by pData.

Returns

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

Comments

This function supports 1-bit to 8-bit PNG images.

The values set by this function are valid for the current thread. To change the values used by the current thread, this function must be called again.

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

Win32, x64, Mobile.

See Also

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

Example

// This example sets PNG transparency data

L_INT SetPNGTRNSExample(L_UCHAR * pData) 
{
   L_INT nRet; 
   nRet = L_SetPNGTRNS( pData, 0xFF); 
   return nRet; 
}