189 lines
3.8 KiB
C
189 lines
3.8 KiB
C
/*
|
|
* fimg-pnm.c
|
|
*
|
|
*
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
|
|
#include "string.h"
|
|
|
|
#include "../floatimg.h"
|
|
|
|
extern int verbosity; /* must be declared around main() */
|
|
|
|
/* ---------------------------------------------------------------- */
|
|
/* nouveau juin 2019, pendant la Ravebish */
|
|
|
|
int fimg_load_from_pnm(char *fname, FloatImg *head, int notused)
|
|
{
|
|
FILE *fp;
|
|
int width, height, maxval;
|
|
int foo, line, column;
|
|
unsigned char *buffline, *idxrd, dummychar;
|
|
float *Rptr, *Gptr, *Bptr;
|
|
|
|
if (NULL==head) {
|
|
fprintf(stderr, "%s : head ptr is %p\n", __func__, head);
|
|
return -8;
|
|
}
|
|
|
|
if (NULL==(fp=fopen(fname, "r"))) {
|
|
perror(fname);
|
|
exit(1);
|
|
}
|
|
|
|
foo = fscanf(fp, "P6 %d %d %d", &width, &height, &maxval);
|
|
if (3 != foo) {
|
|
fprintf(stderr, "%s : fscanf -> %d\n", __func__, foo);
|
|
return -1;
|
|
}
|
|
|
|
if (verbosity) {
|
|
fprintf(stderr, "%s is %dx%d , max=%d\n",fname, width, height, maxval);
|
|
}
|
|
|
|
if (NULL==(buffline=calloc(3, width))) {
|
|
fprintf(stderr, "%s on %s : memory error\n", __func__, fname);
|
|
return -2;
|
|
}
|
|
|
|
foo = fimg_create(head, width, height, 3);
|
|
if (foo) {
|
|
fprintf(stderr, "%s : create floatimg -> %d\n", __func__, foo);
|
|
exit(1);
|
|
}
|
|
|
|
#if DEBUG_LEVEL
|
|
fread(&dummychar, 1, 1, fp);
|
|
fprintf(stderr, "%s : dummychar %xx\n", __func__, dummychar);
|
|
#else
|
|
fseek(fp, 1L, SEEK_CUR); /* black magic */
|
|
#endif
|
|
|
|
Rptr = head->R; Gptr = head->G; Bptr = head->B;
|
|
for (line=0; line<height; line++) {
|
|
foo = fread(buffline, 3, width, fp);
|
|
// fprintf(stderr, "line %d read %d\n", line, width);
|
|
idxrd = buffline;
|
|
for (column=0; column<width; column++)
|
|
{
|
|
*Rptr++ = (float)*idxrd++;
|
|
*Gptr++ = (float)*idxrd++;
|
|
*Bptr++ = (float)*idxrd++;
|
|
}
|
|
}
|
|
|
|
fclose(fp);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* ---------------------------------------------------------------- */
|
|
static void dump_gray_values(FILE *fp, FloatImg *picz, float fk)
|
|
{
|
|
int cnt, sz, value;
|
|
int idx;
|
|
|
|
cnt = 0;
|
|
sz = picz->width * picz->height;
|
|
for (idx=0; idx<sz; idx++) {
|
|
if (fk > 0) value = (int)(picz->R[idx] / fk);
|
|
else value = 0;
|
|
cnt += fprintf(fp, "%d", value);
|
|
if (cnt > 70) {
|
|
fputs("\n", fp); cnt = 0;
|
|
}
|
|
else {
|
|
fputs(" ", fp); cnt++;
|
|
}
|
|
}
|
|
fputs("\n", fp);
|
|
}
|
|
/* ---------------------------------------------------------------- */
|
|
static void dump_rgb_values(FILE *fp, FloatImg *picz, float fk)
|
|
{
|
|
int cnt, sz, idx;
|
|
int Rv, Gv, Bv;
|
|
|
|
cnt = 0;
|
|
sz = picz->width * picz->height;
|
|
for (idx=0; idx<sz; idx++) {
|
|
if (fk > 0) {
|
|
Rv = (int)(picz->R[idx] / fk);
|
|
Gv = (int)(picz->G[idx] / fk);
|
|
Bv = (int)(picz->B[idx] / fk);
|
|
}
|
|
else {
|
|
Rv = Gv = Bv = 0;
|
|
}
|
|
cnt += fprintf(fp, "%d %d %d", Rv, Gv, Bv);
|
|
if (cnt > 60) {
|
|
fputs("\n", fp); cnt = 0;
|
|
}
|
|
else {
|
|
fputs(" ", fp); cnt++;
|
|
}
|
|
}
|
|
fputs("\n", fp);
|
|
}
|
|
/* ---------------------------------------------------------------- */
|
|
/*
|
|
*
|
|
*/
|
|
int fimg_save_as_pnm(FloatImg *head, char *fname, int notused)
|
|
{
|
|
FILE *fp;
|
|
float maximum, fk;
|
|
char *code;
|
|
|
|
#if DEBUG_LEVEL
|
|
fprintf(stderr, ">>> %-25s ( %p '%s' %d )\n", __func__, head,
|
|
fname, notused);
|
|
#endif
|
|
|
|
if ( head->type != FIMG_TYPE_RGB && head->type != FIMG_TYPE_GRAY) {
|
|
#if DEBUG_LEVEL
|
|
fprintf(stderr, "%s : type %d is bad.\n", __func__, head->type);
|
|
#endif
|
|
return -1;
|
|
}
|
|
|
|
if (NULL==(fp=fopen(fname, "w"))) {
|
|
perror(fname);
|
|
return -2;
|
|
}
|
|
|
|
switch(head->type) {
|
|
case FIMG_TYPE_GRAY: code = "P2"; break;
|
|
case FIMG_TYPE_RGB: code = "P3"; break;
|
|
}
|
|
|
|
fprintf(fp, "%s\n%d %d\n", code, head->width, head->height);
|
|
|
|
maximum = fimg_get_maxvalue(head);
|
|
fprintf(fp, "# maxval %15f\n", maximum);
|
|
fk = maximum / 65536.0;
|
|
fprintf(fp, "# divisor %15f\n", fk);
|
|
fprintf(fp, "65535\n");
|
|
fflush(fp);
|
|
|
|
switch(head->type) {
|
|
case FIMG_TYPE_GRAY:
|
|
dump_gray_values(fp, head, fk);
|
|
break;
|
|
case FIMG_TYPE_RGB:
|
|
dump_rgb_values(fp, head, fk);
|
|
break;
|
|
}
|
|
|
|
fputs("\n", fp);
|
|
|
|
fclose(fp);
|
|
|
|
return 0;
|
|
}
|
|
/* ---------------------------------------------------------------- */
|