added a new function : fimg_rotate_90, need more tests

funcs/Makefile

@@ -3,7 +3,7 @@
 COPT = -Wall -fpic -g -pg -no-pie -DDEBUG_LEVEL=0
 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
+	fimg-libpnm.o rampes.o sfx0.o geometry.o rotate.o
 
 #---------------------------------------------------------------
 
@@ -33,6 +33,9 @@ filtrage.o:		filtrage.c $(DEPS)
 geometry.o:		geometry.c $(DEPS)
 	gcc $(COPT) -c $<
 
+rotate.o:		rotate.c $(DEPS)
+	gcc $(COPT) -DDEBUG_LEVEL=1 -c $<
+
 sfx0.o:			sfx0.c $(DEPS)
 	gcc $(COPT) -c $<
 

funcs/rotate.c

@@ -0,0 +1,65 @@
+/*
+ *		FLOATIMG
+ *	rotation matricielle des images
+ *	#coronamaison  Mon 23 Mar 2020 11:45:59 AM CET
+ */
+
+#include  <stdio.h>
+#include  <string.h>
+
+#include  "../floatimg.h"
+
+extern int		verbosity;
+
+/* --------------------------------------------------------------------- */
+int fimg_rotate_90(FloatImg *src, FloatImg *dst, int notused)
+{
+int			foo;
+int			x, y;
+float			rgb[3];
+
+#if DEBUG_LEVEL
+fprintf(stderr, ">>> %s ( %p %p %d )\n", __func__,
+				src, dst, notused);
+#endif
+
+if (src->type != FIMG_TYPE_RGB) {
+	fprintf(stderr, "%s: src type %d not valid\n", __func__,
+					src->type);
+	return -6;
+	}
+
+/* check if dst pic is not allocated */
+if ( 0 == (dst->type | dst->width | dst->height) ) {
+	fprintf(stderr, "in %s, %p is empty\n", __func__, dst);
+	/* OK allocate a new fpic */
+	foo = fimg_create(dst, src->height, src->width, src->type);
+	if (foo) {
+		fprintf(stderr, "%s: err %d create new pic\n", __func__, foo);
+		return -887;
+		}
+	if (verbosity) fimg_describe(dst, "new pic");
+	}
+
+/* check if dst and src are conpatibles */
+if ( (src->type != dst->type)    ||
+     (src->width != dst->height) || (src->height != dst->width) ) {
+	fprintf(stderr, "%s: src & dst not compatibles\n", __func__);
+	return -888;
+	}
+
+/*
+ *		THIS IS A CRUDE IMPLEMENTATION
+*/
+for (y=0; y<src->height; y++) {
+	for (x=0; x<src->width; x++) {
+		fimg_get_rgb(src, x, y, rgb);
+		fimg_plot_rgb(dst, y, x, rgb[0], rgb[1], rgb[2]);
+		}
+	}
+
+/* we don't have any cleanup to make */
+
+return 0;
+}
+/* --------------------------------------------------------------------- */

funcs/sfx0.c

@@ -4,6 +4,7 @@
  */
 
 #include  <stdio.h>
+#include  <string.h>
 
 #include  "../floatimg.h"
 

funcs/t.c

@@ -12,12 +12,43 @@ int		verbosity;
 
 float		global_fvalue;
 
+/* --------------------------------------------------------------------- */
+int essai_rotate(char *infile)
+{
+FloatImg	src, dst;
+int		foo;
+
+if (NULL != infile) {
+	fprintf(stderr, "%s: loading %s\n", __func__, infile);
+	foo = fimg_create_from_dump(infile, &src);
+	if (foo) {
+		fprintf(stderr, "%s: err load '%s'\n", __func__, infile);
+		return foo;
+		}
+	}
+else	{
+	fprintf(stderr, "%s : NOT INPUT FILE, FUBAR\n", __func__);
+	abort();
+	}
+
+fimg_save_as_png(&src, "test.png", 0);
+
+foo = fimg_rotate_90(&src, &dst, 0);
+fprintf(stderr, "rotate 90 -> %d\n", foo);
+
+foo = fimg_save_as_png(&dst, "rotated90.png", 0);
+foo = fimg_save_as_pnm(&dst, "rotated90.pnm", 0);
+
+fimg_destroy(&src);
+
+return -1;
+}
 /* --------------------------------------------------------------------- */
 int essai_filtrage_3x3(char *infile)
 {
 FloatImg	src, dst;
-int		foo, idx;
-char		buffer[100];
+int		foo;			/// , idx;
+// char		buffer[100];
 
 FimgFilter3x3	filter_a =  {
 
@@ -54,7 +85,10 @@ else	{
 fimg_save_as_png(&src, "test.png", 0);
 
 foo = fimg_clone(&src, &dst, 0);
-
+if (foo) {
+	fprintf(stderr, "%s: err clone %p\n", __func__, &src);
+	return -44;
+	}
 fimg_filter_3x3(&src, &dst, &filter_a);
 foo = fimg_clamp_negativ(&dst);
 if (foo) {
@@ -310,9 +344,9 @@ if (foo) {
 	}
 */
 
-foo = essai_filtrage_3x3(filename);
+foo = essai_rotate(filename);
 if (foo) {
-	fprintf(stderr, "Filtre 3x3 ====> %d\n", foo);
+	fprintf(stderr, "Essai ====> %d\n", foo);
 	}
 
 fprintf(stderr, "++++++++++++++ end of pid %d\n", getpid());