first version of displacement mapping

funcs/Makefile

@@ -5,7 +5,8 @@ DEPS = ../floatimg.h Makefile
 OBJS = fimg-png.o fimg-tiff.o misc-plots.o filtrage.o utils.o	\
 	fimg-libpnm.o rampes.o sfx0.o geometry.o rotate.o	\
 	equalize.o fimg-fits.o saturation.o histogram.o		\
-	hsv.o classif.o contour2x2.o qsortrgb.o exporter.o
+	hsv.o classif.o contour2x2.o qsortrgb.o exporter.o	\
+	displacement.o
 
 #---------------------------------------------------------------
 
@@ -19,6 +20,9 @@ t:	t.c $(DEPS) ../libfloatimg.a
 ../libfloatimg.a:       $(OBJS)
 	$(AR) r $@ $?
 
+displacement.o:	displacement.c
+	gcc $(COPT) -c $<
+
 fimg-png.o:		fimg-png.c $(DEPS)
 	gcc $(COPT) -c $<
 

funcs/displacement.c

@@ -0,0 +1,91 @@
+/*
+ *		displacement.c
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include   <math.h>
+
+#include "../floatimg.h"
+
+extern int		verbosity;
+
+/* --------------------------------------------------------------------- */
+/* --------------------------------------------------------------------- */
+/* nouveau 24 octobre 2020, pendant le masque-flamme coronavidique       */
+
+int fimg_displacement_0(FloatImg *psrc, FloatImg *pdst, int flags)
+{
+int		x, y, foo;
+float		minmax[6];
+float		rgb[3];
+float		dltr, dltg, dltb;	/* delta des minmax */
+float		dispx, dispy;
+
+int		dstx, dsty;
+int		in, out;
+
+#if DEBUG_LEVEL
+fprintf(stderr, ">>> %s ( %p %p 0x%04x )\n", __func__, psrc, pdst, flags);
+#endif
+
+if (FIMG_TYPE_RGB != psrc->type) {
+	fprintf(stderr, "%s: bad src type %d\n", __func__, psrc->type);
+	return -7;
+	}
+if (fimg_images_not_compatible(psrc, pdst)) {
+	fprintf(stderr, "%s: bad dst type %d\n", __func__, pdst->type);
+	return -8;
+	}
+
+foo = fimg_get_minmax_rgb(psrc, minmax);
+if (verbosity) {
+	fimg_print_minmax(minmax, (char *)__func__);
+	}
+
+dltr = minmax[1] - minmax[0];
+dltg = minmax[3] - minmax[2];
+dltb = minmax[5] - minmax[4];
+
+in = out = 0;
+
+for (y=0; y<psrc->height; y++) {
+
+	for (x=0; x<psrc->width; x++) {
+
+		fimg_get_rgb(psrc, x, y, rgb);
+
+		dispx = (float)x + (rgb[1]/dltg * 10.0);
+		dispy = (float)y + (rgb[2]/dltb * 10.0);
+		dstx = (int)roundf(dispx - 5.0);
+		dsty = (int)roundf(dispy - 5.0);
+
+		if (		(dstx < 0) || (dsty < 0)	||
+				(dstx >= psrc->width)		||
+				(dsty >= psrc->height)		)
+			{
+			/* OUT OF DESTINATION PICTURE */
+			out++;
+			}
+		else	{
+			rgb[1] = rgb[2] = rgb[0];
+			fimg_put_rgb(pdst, dstx, dsty, rgb);
+			// fprintf(stderr, "%5d %5d %f\n", dstx, dsty, rgb[1]);
+			in++;
+			}
+
+		}
+
+	if (verbosity > 2) {
+		fprintf(stderr, "%4d / %4d\n", y, psrc->height);
+		}
+	}
+
+fprintf(stderr, "%s ------->  in %d  out %d\n", __func__, in, out);
+
+return 0;
+}
+/* --------------------------------------------------------------------- */
+
+

funcs/t.c

@@ -14,6 +14,39 @@ int		verbosity;
 
 float		global_fvalue;
 
+/* --------------------------------------------------------------------- */
+/* nouveau 24 octobre 2020, pendant le masque-flamme coronavidique       */
+
+int fimg_displacement_0(FloatImg *psrc, FloatImg *pdst, int flags);
+
+int essai_displacement(char *infile, char *outfile)
+{
+int		foo;
+FloatImg	src, dst;
+
+fprintf(stderr, "%s : loading %s\n", __func__, infile);
+foo = fimg_create_from_dump(infile, &src);
+if (foo) {
+	fprintf(stderr, "%s: error loading '%s'\n", __func__, infile);
+	return foo;
+	}
+
+fimg_clone(&src, &dst, 1);
+
+foo = fimg_displacement_0(&src, &dst, 0);
+if (foo) {
+	fprintf(stderr, "%s: err %d in disp map 0\n", __func__, foo);
+	return foo;
+	}
+
+foo = fimg_export_picture(&dst, outfile, 0);
+if (foo) {
+	fprintf(stderr, "%s : err %d saving result\n", __func__, foo);
+	return foo;
+	}
+
+return 0;
+}
 /* --------------------------------------------------------------------- */
 /*
  *	nouveau 7 octobre 2020 pendant sonoptic
@@ -557,7 +590,8 @@ return 0;
 }
 /* --------------------------------------------------------------------- */
 enum nCmd { Equalize=1, Rotate, Sfx0, F3x3, MIRE, Wfits, Wpng, Wtiff,
-			Histo, Hsv, Classif, Ctr2x2, Qsortrgb  };
+			Histo, Hsv, Classif, Ctr2x2, Qsortrgb,
+			Displace  };
 typedef struct {
 	char	*name;
 	int	Cmd;
@@ -577,6 +611,7 @@ Command commands[] = {
 	{ "classif",	Classif		},
 	{ "ctr2x2",	Ctr2x2		},
 	{ "qsortrgb",	Qsortrgb	},
+	{ "displace",	Displace	},
 	{ NULL,		0		}
 	} ;
 
@@ -620,10 +655,11 @@ int		foo, opt;
 char		*filename, *command, *outfile;
 
 fprintf(stderr, "++++++++ test des fonctions pid=%d\n", getpid());
+fprintf(stderr, "++++++++ compiled "__DATE__" at " __TIME__ "\n");
 
 global_fvalue	= 1.0;
 outfile 	= "out.pnm";
-
+command		= "none";
 
 while ((opt = getopt(argc, argv, "hk:o:p:v")) != -1) {
 	switch(opt) {
@@ -690,6 +726,9 @@ switch(opt) {
 	case Qsortrgb:
 		foo = essai_qsort_rgb(filename, outfile);
 		break;
+	case Displace:
+		foo = essai_displacement(filename, outfile);
+		break;
 	default:
 		fprintf(stderr, "%s : bad command\n", command);
 		exit(1);

funcs/vroum.sh

@@ -6,7 +6,7 @@ out=out.fimg
 maxi=49
 W="640"
 H="480"
-grabopt=" -s 640x480 -vv -p 0 -n 400 -c pow2 "
+grabopt=" -s 640x480 -vv  -p 0 -n 300 -c cos01 "
 
 mkdir /tmp/V
 
@@ -20,9 +20,11 @@ do
 	grabvidseq -$grabopt -o $src
 
 	fval=$(echo "$foo / $maxi" | bc -l)
-	./t -vv -k 0.333 -o $out classif $src
-	echo $foo ' => ' $fval
+	./t -vv -k 0.333 -o $out displace $src
 
+	# fimgstats $out
+
+	echo $foo ' => ' $fval
 	dst=$(printf "/tmp/V/%03d.png" $foo)
 	echo $dst
 	montage $src $out -tile 1x2 -geometry $G $dst