LPFNIG_WRITE

This function will be called during file operations when a WRITE is required.

Declaration:

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typedef LONG (ACCUAPI LPFNIG_WRITE) ( LONG fd, const LPBYTE lpBuffer, LONG lSize );

Arguments:

Name	Type	Description
fd	LONG	File Descriptor handle.
lpBuffer	const LPBYTE	Far pointer to buffer from which to write.
lSize	LONG	Number of bytes to write.

Return Value:

Return the number of bytes written, or -1 to indicate that an error occurred.

Supported Raster Image Formats:

This function does not process image pixels.

Sample:

IOSET

Example:

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HIGEAR hIGear; /* HIGEAR handle of image / LPFNIG_WRITE MyWriteFunc; / To be called for file WRITEs / { IG_file_IO_register ( NULL, MyWriteFunc, NULL ); / Register it / ... IG_save_file ( hIGear, "picture.bmp", IG_SAVE_BMP_UNCOMP ); ... } / This will be called for each write during the above Save: / LONG ACCUAPI MyWriteFunc ( LONG fd, LPBYTE lpBuffer, LONG lNumToWrite ) { LONG nNumActuallyWritten; ... return nNumActuallyWritten; / Return count, or -1 for error */

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HIGEAR       hIGear;        /* HIGEAR handle of image */
LPFNIG_WRITE  MyWriteFunc; /* To be called for file WRITEs */
{
IG_file_IO_register ( NULL, MyWriteFunc, NULL );    /* Register it */
 ...
IG_save_file ( hIGear, "picture.bmp", IG_SAVE_BMP_UNCOMP );
 ...
}
/* This will be called for each write during the above Save:  */
LONG ACCUAPI  MyWriteFunc ( LONG fd, LPBYTE lpBuffer, LONG lNumToWrite )
{
LONG     nNumActuallyWritten;
 ...
return  nNumActuallyWritten; /* Return count, or -1 for error  */

Remarks:

This type of function is established by calling IG_file_IO_register().