added and debugged first filter function

funcs/filtrage.c

@@ -10,6 +10,8 @@
 int fimg_lissage_2x2(FloatImg *img)
 {
 int		x, y, offset;
+float		cr, cg, cb;
+float		*pr, *pg, *pb;
 
 #if DEBUG_LEVEL
 fprintf(stderr, ">>> %s ( %p )\n", __func__, img);
@@ -17,15 +19,77 @@ fprintf(stderr,"     type %d size %dx%d\n", img->type,
 					img->width, img->height);
 #endif
 
-for (y=1; y<img->height; y++) {
+pr = img->R;	pg = img->G;	pb = img->B;
 
-	for (x=1; x<img->width; x++) {
+for (y=1; y < img->height-1; y++) {
+
+	for (x=1; x < img->width-1; x++) {
 
 		offset = x + (y * img->width);
 
+	cr =	pr[offset]		+	pr[offset+1]	+
+		pr[offset+img->width]	+	pr[offset+img->width+1];
+
+	cg =	pg[offset]		+	pg[offset+1]	+
+		pg[offset+img->width]	+	pg[offset+img->width+1];
+
+	cb =	pb[offset]		+	pb[offset+1]	+
+		pb[offset+img->width]	+	pb[offset+img->width+1];
+
+	pr[offset] = cr / 4.0;
+	pg[offset] = cg / 4.0;
+	pb[offset] = cb / 4.0;
+
 	}
 }
 
+return 0;
+}
+/* -------------------------------------------------------------------- */
+int fimg_killborders(FloatImg *img)
+{
+int		idx, h, w, o;
+
+#if DEBUG_LEVEL
+fprintf(stderr, ">>> %s ( %p )\n", __func__, img);
+fprintf(stderr,"     type %d size %dx%d\n", img->type,
+					img->width, img->height);
+#endif
+
+h = img->height;	w = img->width;
+
+for (idx=0; idx<h; idx++) {
+
+#define FAST 1
+
+#if FAST
+	img->R[idx*w] = 0.0;
+	img->G[idx*w] = 0.0;
+	img->B[idx*w] = 0.0;
+	img->R[(idx*w)+w-1] = 0.0;
+	img->G[(idx*w)+w-1] = 0.0;
+	img->B[(idx*w)+w-1] = 0.0;
+#else
+	fimg_plot_rgb(img, 0, idx, 0.0, 0.0, 0.0);
+	fimg_plot_rgb(img, w-1, idx, 0.0, 0.0, 0.0);
+#endif
+	}
+
+o = w * (h - 1);
+
+for (idx=0; idx<w; idx++) {
+#if FAST
+	img->R[idx] = 0.0;
+	img->G[idx] = 0.0;
+	img->B[idx] = 0.0;
+	img->R[idx+o] = 0.0;
+	img->G[idx+o] = 0.0;
+	img->B[idx+o] = 0.0;
+#else
+	fimg_plot_rgb(img, idx, 0, 0.0, 0.0, 0.0);
+	fimg_plot_rgb(img, idx, h-1, 0.0, 0.0, 0.0);
+#endif
+	}
 return -1;
 }
 /* -------------------------------------------------------------------- */

funcs/t.c

@@ -12,6 +12,40 @@ int		verbosity;
 
 float		global_fvalue;
 
+/* --------------------------------------------------------------------- */
+int essai_filtrage(char *infile)
+{
+FloatImg	fimg;
+int		foo, idx;
+char		buffer[100];
+
+if (NULL != infile) {
+	fprintf(stderr, "loading %s\n", infile);
+	foo = fimg_create_from_dump(infile, &fimg);
+	if (foo) {
+		fprintf(stderr, "%s: err load '%s'\n", __func__, infile);
+		return foo;
+		}
+	}
+else	{
+	fprintf(stderr, "%s is creating the picz\n", __func__);
+	fimg_create(&fimg, 512, 512, FIMG_TYPE_RGB);
+	fimg_draw_something(&fimg);
+	}
+
+foo = fimg_save_as_pnm(&fimg, "source.pnm", 0);
+
+for (idx=0; idx<20; idx++) {
+	foo = fimg_lissage_2x2(&fimg);
+	foo = fimg_killborders(&fimg);
+	sprintf(buffer, "filter%03d.pnm", idx);
+	foo = fimg_save_as_pnm(&fimg, buffer, 0);
+	}
+
+fimg_destroy(&fimg);
+
+return 0;
+}
 /* --------------------------------------------------------------------- */
 int essai_geometrie(char *infile)
 {
@@ -173,6 +207,7 @@ return 0;
 int main(int argc, char *argv[])
 {
 int		foo, opt;
+char		*filename;
 
 puts("++++++++++++++++++++++++++++++++");
 
@@ -186,9 +221,14 @@ while ((opt = getopt(argc, argv, "hk:v")) != -1) {
 		}
 	}
 
-foo = essai_geometrie("foo.fimg");
+fprintf(stderr, "argc %d   optind %d\n", argc, optind);
+
+filename = NULL;
+if (1 == argc-optind)	filename = argv[optind];
+
+foo = essai_filtrage(filename);
 if (foo) {
-	fprintf(stderr, "************ %d\n", foo);
+	fprintf(stderr, "====> %d\n", foo);
 	}
 
 return 0;