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