tTh/FloatImg
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another scaling computation...

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tth 2019-09-17 11:22:00 +02:00
parent f3d2dd6034
commit b0fe0091d4
2 changed files with 17 additions and 9 deletions
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2
floatimg.h
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@ -58,7 +58,7 @@ int fimg_sub(FloatImg *a, FloatImg *b, FloatImg *d);
int fimg_mul(FloatImg *a, FloatImg *b, FloatImg *d);
/* PNM files module */
int fimg_save_as_pnm(FloatImg *head, char *fname, int notused);
int fimg_save_as_pnm(FloatImg *head, char *fname, int flags);
int fimg_load_from_pnm(char *fname, FloatImg *head, int notused);
double fimg_timer_set(int whot);

24
lib/fimg-pnm.c
View File

@ -131,17 +131,17 @@ fputs("\n", fp);
}
/* ---------------------------------------------------------------- */
/*
*
* bit 0 of flags : use fvalue/count
*/
int fimg_save_as_pnm(FloatImg *head, char *fname, int notused)
int fimg_save_as_pnm(FloatImg *head, char *fname, int flags)
{
FILE *fp;
float maximum, fk;
char *code;
#if DEBUG_LEVEL
fprintf(stderr, ">>> %-25s ( %p '%s' %d )\n", __func__, head,
fname, notused);
fprintf(stderr, ">>> %-25s ( %p '%s' 0x%04x )\n", __func__, head,
fname, flags);
#endif
if ( head->type != FIMG_TYPE_RGB && head->type != FIMG_TYPE_GRAY) {
@ -163,10 +163,18 @@ switch(head->type) {
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 / 65535.0;
fprintf(fp, "# divisor %15f\n", fk);
if ( flags & 1 ) {
fprintf(stderr, "%s using fval/count %f %d -> %f\n", __func__,
head->fval, head->count,
head->fval * head->count);
fk = (head->fval * head->count) / 65535.0;
}
else {
maximum = fimg_get_maxvalue(head);
fk = maximum / 65535.0;
fprintf(fp, "# maxval %15f\n# divisor %15f\n", maximum, fk);
}
fprintf(fp, "65535\n");
fflush(fp);