I can now write PNG files :)

funcs/t.c

@@ -51,11 +51,30 @@ printf("%-10s %d\n\n", fname, foo);
 return 0;
 }
 /* --------------------------------------------------------------------- */
-int main(int argc, char *argv[])
+int essai_ecrire_png(char *fname)
 {
+FloatImg	fimg;
 int		foo;
 
-foo = essai_detect_type();
+fimg_create(&fimg, 512, 512, FIMG_TYPE_RGB);
+for (foo=0; foo<512; foo++) {
+	fimg_plot_rgb(&fimg, foo, foo, 17000.0, 8000.0, 11111.1);
+	}
+
+fimg_save_as_pnm(&fimg, "quux.pnm", 0);
+
+foo = fimg_save_as_png(&fimg, fname, 0);
+
+return 0;
+}
+/* --------------------------------------------------------------------- */
+int main(int argc, char *argv[])
+{
+int		foo;
+
+puts("++++++++++++++++++++++++++++++++");
+
+foo = essai_ecrire_png("dessin.png");
 
 return 0;
 }