rle_raw_alc.c File Reference

#include <stdio.h>
#include "rle.h"
#include "rle_raw.h"

Include dependency graph for rle_raw_alc.c:

Go to the source code of this file.

Functions
int	rle_raw_alloc (rle_hdr *the_hdr, rle_op ***scanp, int **nrawp)
void	rle_raw_free (rle_hdr *the_hdr, rle_op **scanp, nrawp)

Function Documentation

int rle_raw_alloc	(	rle_hdr *	the_hdr,
		rle_op ***	scanp,
		int **	nrawp
	)

Definition at line 60 of file rle_raw_alc.c.

{
    rle_op ** scanbuf, * opbuf;
    int rowlen, nchan = 0, i, ncol;

    rowlen = the_hdr->xmax - the_hdr->xmin + 1;
    if ( the_hdr->alpha && RLE_BIT( *the_hdr, RLE_ALPHA ) )
    nchan++;
    for ( i = 0; i < the_hdr->ncolors; i++ )
    if ( RLE_BIT( *the_hdr, i ) )
         nchan++;

    ncol = the_hdr->ncolors + the_hdr->alpha;

    if ( (scanbuf = (rle_op **) malloc( ncol * sizeof(rle_op *) )) == 0 )
    return -1;

    if ( (opbuf = (rle_op *)malloc( nchan * rowlen * sizeof(rle_op) )) == 0 )
    {
    free( scanbuf );
    return -1;
    }

    if ( nrawp && (*nrawp = (int *)malloc( ncol * sizeof(int) )) == 0 )
    {
    free( scanbuf );
    free( opbuf );
    return -1;
    }

    if ( the_hdr->alpha )
    {
    scanbuf++;
    if ( nrawp )
        (*nrawp)++;
    }

    for ( i = -the_hdr->alpha; i < the_hdr->ncolors; i++ )
    if ( RLE_BIT( *the_hdr, i ) )
    {
        scanbuf[i] = opbuf;
        opbuf += rowlen;
    }
    else
        scanbuf[i] = 0;
    *scanp = scanbuf;

    return 0;
}

void rle_raw_free	(	rle_hdr *	the_hdr,
		rle_op **	scanp,
		nrawp
	)

Definition at line 131 of file rle_raw_alc.c.

{
    int i;

    if ( the_hdr->alpha )
    {
    scanp--;
    if ( nrawp )
        nrawp--;
    }
    for ( i = 0; i < the_hdr->ncolors + the_hdr->alpha; i++ )
    if ( scanp[i] != 0 )
    {
        free( (char *)scanp[i] );
        break;
    }
    free( (char *)scanp );
    if ( nrawp )
    free( (char *)nrawp );
}