new func: fimg_do_stripes(&fimg, 0);

floatimg.h

@@ -20,7 +20,7 @@
  *	https://git.tetalab.org/tTh/FloatImg
  */
 
-#define		FIMG_VERSION	(198)
+#define		FIMG_VERSION	(202)
 #define		RELEASE_NAME	("noname")
 
 /* XXX add a test for stdint.h / uint32_t XXX */
@@ -233,7 +233,7 @@ int fimg_qsort_rgb_b(FloatImg *psrc, FloatImg *pdst, int notused);
 
 /*	module funcs/equalize.c		*/
 int fimg_equalize_compute(FloatImg *src, void *vptr, float vmax);
-int fimg_equalize(FloatImg *src, float vmax);
+int fimg_equalize(FloatImg *src, double vmax);
 
 int fimg_mk_gray_from(FloatImg *src, FloatImg*dst, int k);
 int fimg_desaturate(FloatImg *src, FloatImg *dst, int notused);
@@ -254,6 +254,7 @@ int fimg_displacement_0(FloatImg *psrc, FloatImg *pdst, int flags);
 /*	module funcs/rampes.c		*/
 int fimg_hdeg_a(FloatImg *img, double dcoef);
 int fimg_vdeg_a(FloatImg *img, double dcoef);
+int fimg_do_stripes(FloatImg *img, int mode);
 
 /*	FIMG native file module		*/
 int   fimg_fileinfos(char *fname, int *datas);
@@ -285,6 +286,7 @@ int   fimg_meanvalues(FloatImg *head, float means[4]);
 int   fimg_to_gray(FloatImg *head);
 int   fimg_add_cste(FloatImg *fi, float value);
 int   fimg_mul_cste(FloatImg *fi, float value);
+int   fimg_div_cste(FloatImg *fi, float value);
 int   fimg_ajust_from_grab(FloatImg *fi, double maxima, int notused);
 int   fimg_absolute(FloatImg *fimg);
 void  fimg_drand48(FloatImg *fi, float kmul);

funcs/equalize.c

@@ -16,9 +16,10 @@ extern int		verbosity;
 /* --------------------------------------------------------------------- */
 /*				new func: Wed 14 Sep 2022 11:28:04 AM CEST
 */
-int fimg_equalize(FloatImg *src, float vmax)
+int fimg_equalize(FloatImg *src, double vmax)
 {
-float			mm[6], maxi, coef;
+float			mm[6];
+double			maxi, coef;
 int			foo;
 
 #if DEBUG_LEVEL
@@ -31,8 +32,8 @@ if (foo) {
 	fprintf(stderr, "%s: err %d get_minmax\n", __func__, foo);
 	return foo;
 	}
-maxi = mm[1] > mm[3] ? mm[1] : mm[3];
+maxi = mm[1] > mm[3] ? (double)mm[1] : (double)mm[3];
-maxi = maxi  > mm[5] ? maxi  : mm[5];
+maxi = maxi  > mm[5] ?         maxi  : (double)mm[5];
 coef = vmax / maxi;
 
 if (verbosity) {
@@ -41,7 +42,7 @@ if (verbosity) {
 	fprintf(stderr, "vmax %f maxi %f multcoef = %g\n", vmax, maxi, coef);
 	}
 
-foo = fimg_mul_cste(src, coef);
+foo = fimg_mul_cste(src, (float)coef);
 if (foo) {
 	fprintf(stderr, "%s: err %d mul_cste\n", __func__, foo);
 	return foo;

funcs/rampes.c

@@ -5,6 +5,7 @@
 
 #include  <stdio.h>
 #include  <stdint.h>
+#include  <stdlib.h>
 #include  <sys/time.h>
 
 #include  "../floatimg.h"
@@ -23,8 +24,7 @@ if (FIMG_TYPE_RGB != img->type) {
 	fprintf(stderr, "%s bad type\n", __func__);
 	return -6;
 	}
-for (x=0; x<img->width; x++)
+for (x=0; x<img->width; x++) {
-	{
 	value = (float)x / (float)img->width;
 	value *= dcoef;
 	for (y=0; y<img->height; y++) {
@@ -51,11 +51,10 @@ if (FIMG_TYPE_RGB != img->type) {
 	fprintf(stderr, "%s bad type\n", __func__);
 	return -6;
 	}
-for (y=0; y<img->height; y++)
-	{
-	value = (float)y / (float)img->height;
-	value *= dcoef;
 for (x=0; x<img->width; x++) {
+	value = (float)x / (float)img->width;
+	value *= dcoef;
+	for (y=0; y<img->height; y++) {
 		fimg_plot_rgb(img, x, y, value, value, value);
 		}
 	}
@@ -63,3 +62,47 @@ for (y=0; y<img->height; y++)
 return 0;
 }
 /* --------------------------------------------------------------------- */
+/*				nouveau 19 septembre 2022		 */
+
+int fimg_do_stripes(FloatImg *img, int mode)
+{
+int		x, y, quad;
+float		*ligne;
+float		fr, fg, fb;
+
+fprintf(stderr, ">>> %s ( %p %d )\n", __func__, img, mode);
+
+/*
+ *	allocate and fill a lookup table
+ */
+if (NULL==(ligne=malloc(img->width*sizeof(float)))) {
+	fprintf(stderr, "%s: malloc fail\n", __func__);
+	exit(1);
+	}
+for (x=0; x<img->width; x++)
+	ligne[x] = (float)x / (float)img->width;
+
+/*
+ *	build the pixels
+ */
+for (y=0; y<img->height; y++)
+	{
+	quad = (y*4) / img->height ;
+	for (x=0; x<img->width; x++) {
+		fr = fg = fb = ligne[x];
+		switch(quad) {
+			case 0:		fg = fb = 0;		break;
+			case 1:		fr = fb = 0;		break;
+			case 2:		fr = fg = 0;		break;
+			case 3:					break;
+			default:	abort();		break;
+			}
+		fimg_plot_rgb(img, x, y, fr, fg, fb);
+		}
+	}
+
+free(ligne);
+
+return 0;
+}
+/* --------------------------------------------------------------------- */

lib/fimg-math.c

@@ -296,6 +296,33 @@ if (fi->type == FIMG_TYPE_GRAY) {
 return 0;
 }
 /* ---------------------------------------------------------------- */
+/*				nouveau 17 septembre 2022 */
+int   fimg_div_cste(FloatImg *fi, float value)
+{
+int		nbre, idx;
+
+if ( (fi->type != FIMG_TYPE_RGB) && (fi->type != FIMG_TYPE_GRAY) ) {
+	fprintf(stderr, "%s : type %d invalide\n",
+				__func__, fi->type);
+	return -44;
+	}
+
+nbre = fi->width * fi->height;
+if (fi->type == FIMG_TYPE_RGB) {
+	for (idx=0; idx<nbre; idx++) {
+		fi->R[idx] /= value;
+		fi->G[idx] /= value;
+		fi->B[idx] /= value;
+		}
+	}
+if (fi->type == FIMG_TYPE_GRAY) {
+	for (idx=0; idx<nbre; idx++) {
+		fi->R[idx] /= value;
+		}
+	}
+return 0;
+}
+/* ---------------------------------------------------------------- */
 /*
  *	oh, please explain the usecase of this function !
  */

tools/cumulfimgs.c

@@ -40,9 +40,10 @@ void help(int v)
 puts("");
 puts("$ cumulfimgs a.fimg b.fimg c-fimg ...");
 puts("cumulator options :");
-puts("\t-v\tincrease verbosity");
-puts("\t-o\tname of output file");
 puts("\t-g\tconvert to gray level");
+puts("\t-o\tname of output file");
+puts("\t-s\trescale end image");
+puts("\t-v\tincrease verbosity");
 puts("");
 if (verbosity) { puts("Xperiment"); fimg_print_version(v); }
 exit(0);
@@ -52,22 +53,25 @@ int main(int argc, char *argv[])
 {
 int		foo, idx;
 int		opt;
-int		compte = 0;
 
+int		compte		= 0;
 int		to_gray		= 0;
 int		experiment	= 0;
+int		rescale		= 0;
+int		src_loaded	= 0;
+
 char		*output_file	= "out.fimg";
 FloatImg	accu, temp;
-int		src_loaded = 0;
 float		vals[6];
 
 g_width = g_height = 0;
 
-while ((opt = getopt(argc, argv, "gho:vx")) != -1) {
+while ((opt = getopt(argc, argv, "gho:svx")) != -1) {
 	switch(opt) {
 		case 'g':	to_gray = 1;			break;
 		case 'h':	help(1);			break;
 		case 'o':	output_file = optarg;		break;
+		case 's':	rescale = 1;			break;
 		case 'v':	verbosity++;			break;
 		case 'x':	experiment++;			break;
 		}
@@ -104,6 +108,11 @@ for (idx=optind; idx<argc; idx++) {
 	compte++;
 	}
 
+if (rescale) {
+	fprintf(stderr, "cumulfimg: count = %d\n", compte);
+	fimg_div_cste(&accu, (float)compte);
+	}
+
 /*	XXX 		*/
 if (experiment) {
 

tools/mkfimg.c

@@ -154,8 +154,8 @@ fname = argv[optind];
 
 if (verbosity>1) fprintf(stderr, "*** mkfimg *** %s %s *** pid %ld\n",
 				__DATE__, __TIME__, (long)getpid());
-if (verbosity)   fprintf(stderr, "making  '%s'  %dx%d, type %d\n",
+if (verbosity)   fprintf(stderr, "::: %s is making  '%s'  %dx%d, type %d\n",
-					fname, width, height, type);
+					argv[0], fname, width, height, type);
 
 srand48(getpid() ^ time(NULL));
 
@@ -176,6 +176,7 @@ switch(type) {
 	case T_TPAT0:		fimg_test_pattern(&fimg, 0, fvalue); break;
 	case T_MIRCOL1:		fimg_mircol_1(&fimg, fvalue);	break;
 	case T_BLOUP:		fimg_draw_something(&fimg);	break;
+	case T_STRIPES:		fimg_do_stripes(&fimg, 0);	break;
 	case -1:		exit(1);
 	}
 
@@ -191,8 +192,9 @@ if (wrmdata) {
 else	{
 	foo = fimg_dump_to_file(&fimg, fname, 0);
 	}
+
 if (foo) {
-	fprintf(stderr, "dump fimg to %s error -> %d\n", fname, foo);
+	fprintf(stderr, "*** dump fimg to %s error -> %d\n", fname, foo);
 	exit(1);
 	}