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#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include "loader.h"
#ifdef USE_X11
# include "viewer.h"
#endif
/* ---------------------------------------------------------------------- */
/* load */
struct ppm_state {
FILE *infile;
int width,height;
unsigned char *row;
};
static void*
pnm_init(FILE *fp, char *filename, struct ida_image_info *i)
{
struct ppm_state *h;
char line[1024];
h = malloc(sizeof(*h));
memset(h,0,sizeof(*h));
h->infile = fp;
fgets(line,sizeof(line),fp); /* Px */
fgets(line,sizeof(line),fp); /* width height */
while ('#' == line[0])
fgets(line,sizeof(line),fp); /* skip comments */
sscanf(line,"%d %d",&h->width,&h->height);
fgets(line,sizeof(line),fp); /* ??? */
if (0 == h->width || 0 == h->height)
goto oops;
i->width = h->width;
i->height = h->height;
h->row = malloc(h->width*3);
return h;
oops:
fclose(fp);
free(h);
return NULL;
}
static void
ppm_read(unsigned char *dst, int line, void *data)
{
struct ppm_state *h = data;
fread(dst,h->width,3,h->infile);
}
static void
pgm_read(unsigned char *dst, int line, void *data)
{
struct ppm_state *h = data;
unsigned char *src;
int x;
fread(h->row,h->width,1,h->infile);
src = h->row;
for (x = 0; x < h->width; x++) {
dst[0] = src[0];
dst[1] = src[0];
dst[2] = src[0];
dst += 3;
src += 1;
}
}
static void
pnm_done(void *data)
{
struct ppm_state *h = data;
fclose(h->infile);
free(h->row);
free(h);
}
struct ida_loader ppm_loader = {
magic: "P6",
moff: 0,
mlen: 2,
name: "ppm parser",
init: pnm_init,
read: ppm_read,
done: pnm_done,
};
struct ida_loader pgm_loader = {
magic: "P5",
moff: 0,
mlen: 2,
name: "pgm parser",
init: pnm_init,
read: pgm_read,
done: pnm_done,
};
#ifdef USE_X11
/* ---------------------------------------------------------------------- */
/* save */
static int
ppm_write(FILE *fp, struct ida_image *img)
{
fprintf(fp,"P6\n"
"# written by ida " VERSION "\n"
"# http://bytesex.org/ida/\n"
"%d %d\n255\n",
img->i.width,img->i.height);
fwrite(img->data, img->i.height, 3*img->i.width, fp);
return 0;
}
struct ida_writer ppm_writer = {
label: "PPM",
ext: { "ppm", NULL},
write: ppm_write,
};
#endif
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