rle.c File Reference

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

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Go to the source code of this file.

Functions
void	rasterInit (int fd, int width, int height)
void	rasterRowGet (unsigned char *red, unsigned char *green, unsigned char *blue)
void	rasterDone ()

Variables
static char	rcsid [] = "$Header:$"
rle_hdr	hdr
struct {
int   width
int   height
unsigned char **   scan
int   row
}	Globals

Function Documentation

void rasterDone

(

)

Definition at line 103 of file rle.c.

References hdr, and rle_puteof().

{
    rle_puteof(&hdr);
}

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void rasterInit	(	int	fd,
		int	width,
		int	height
	)

Definition at line 31 of file rle.c.

{
    FILE           *rleFile;
    int             i;

    hdr = *rle_hdr_init( (rle_hdr *)NULL );
    /* Fake the names, since we don't have argv. */
    rle_names( &hdr, "rletoabA62", fd == 0 ? NULL : "RLE file", 0 );

    Globals.width = width;
    Globals.height = height;
    if (fd == 0) {
    rleFile = stdin;
    } else {
    rleFile = fdopen(fd, "r");
    }
    hdr.rle_file = rleFile;
    rle_get_setup_ok(&hdr, NULL, NULL);

    if (hdr.xmax > width) {
    fprintf(stderr, "Warning: RLE width (%d) exceeds maximum (%d)\n", 
        hdr.xmax, width);
    }
    if (hdr.ymax > height) {
    fprintf(stderr, "Warning: RLE height (%d) exceeds maximum (%d)\n", 
        hdr.ymax, height);
    }
    Globals.row = 0;
    Globals.scan = (unsigned char **) malloc((hdr.ncolors +
                      hdr.alpha) *
                     sizeof(unsigned char *));
    for (i = 0; i < hdr.ncolors + hdr.alpha; i++)
    Globals.scan[i] = 
        (unsigned char *)malloc(hdr.xmax+1);

    if (hdr.alpha) {
    Globals.scan++;
    }
}

void rasterRowGet	(	unsigned char *	red,
		unsigned char *	green,
		unsigned char *	blue
	)

Definition at line 75 of file rle.c.

{
    int             i, max;

    if (Globals.row < hdr.ymin || Globals.row > hdr.ymax) {
    for (i = 0; i < Globals.width; i++) {
        red[i] = 0;
        green[i] = 0;
        blue[i] = 0;
    }
    } else {
    rle_getrow(&hdr, Globals.scan);
    max = hdr.xmax < Globals.width ?
        hdr.xmax : Globals.width;
    for (i = 0 ; i < max; i++) {
        red[i] = Globals.scan[0][i];
        green[i] = Globals.scan[1][i];
        blue[i] = Globals.scan[2][i];
    }
    for (; i < Globals.width; i++) {
        red[i] = green[i] = blue[i] = 0;
    }
    }
    Globals.row++;
}

Variable Documentation

struct { ... } Globals

rle_hdr hdr

Definition at line 21 of file rle.c.

int height

Definition at line 25 of file rle.c.

char rcsid[] = "$Header:$"

static

Definition at line 8 of file rle.c.

int row

Definition at line 27 of file rle.c.

unsigned char** scan

Definition at line 26 of file rle.c.

int width

Definition at line 24 of file rle.c.