rle_row_alc.c File Reference

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

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Functions
int	rle_row_alloc (rle_hdr *the_hdr, rle_pixel ***scanp)
void	rle_row_free (rle_hdr *the_hdr, rle_pixel **scanp)

Function Documentation

int rle_row_alloc	(	rle_hdr *	the_hdr,
		rle_pixel ***	scanp
	)

Definition at line 56 of file rle_row_alc.c.

Referenced by get_scanlines(), RLE::open:, write_ppm_data(), write_rlb_data(), and write_rle_data().

{
    rle_pixel ** scanbuf, * pixbuf;
    int rowlen, nchan = 0, i, ncol;

    rowlen = the_hdr->xmax + 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_pixel **)malloc( ncol * sizeof(rle_pixel *) )) == 0 )
    return -1;
    if ( (pixbuf = (rle_pixel *)malloc( nchan * rowlen *
                       sizeof(rle_pixel) )) == 0 )
    {
    free( scanbuf );
    return -1;
    }

    if ( the_hdr->alpha )
    scanbuf++;

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

    return 0;
}

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void rle_row_free	(	rle_hdr *	the_hdr,
		rle_pixel **	scanp
	)

Definition at line 114 of file rle_row_alc.c.

Referenced by RLE::open:, write_ppm_data(), and write_rle_data().

{
    int i;

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

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