sch2fig/: support 180 deg rotation of components

sch2fig/lib.c

@@ -216,6 +216,13 @@ static void draw_pin(const struct comp *comp, const struct pin_obj *pin,
 	};
 
 	text_rot(&name_txt, matrix_to_angle(m));
+	switch (name_txt.rot) {
+	case 180:
+		text_flip_x(&name_txt);
+		break;
+	default:
+		break;
+	}
 	if (comp->show_pin_name)
 		text_fig(&name_txt, COLOR_PIN_NAME, LAYER_PIN_NAME);
 
@@ -239,7 +246,7 @@ static void draw_pin(const struct comp *comp, const struct pin_obj *pin,
 		.vert = text_min,
 	};
 
-	text_rot(&num_txt, matrix_to_angle(m));
+	text_rot(&num_txt, matrix_to_angle(m) % 180);
 	if (comp->show_pin_num)
 		text_fig(&num_txt, COLOR_PIN_NUMBER, LAYER_PIN_NUMBER);
 

sch2fig/misc.c

@@ -30,6 +30,8 @@ unsigned matrix_to_angle(int m[6])
 		return 0;
 	if (eq(m, 0, -1, -1, 0))
 		return 90;
+	if (eq(m, -1, 0, 0, 1))
+		return 180;
 	if (eq(m, 0, 1, 1, 0))
 		return 270;
 	fprintf(stderr, "unrecognized matrix %d %d %d %d\n",

sch2fig/text.c

@@ -62,12 +62,21 @@ enum text_align text_flip(enum text_align align)
 	case text_mid:
 		return text_mid;
 	case text_max:
-		return text_max;
+		return text_min;
 	default:
 		abort();
 	}
 }
 
+
+void text_flip_x(struct text *txt)
+{
+	txt->rot = angle_add(txt->rot, 180);
+	txt->hor = text_flip(txt->hor);
+	// @@@ flip vert, too ?
+}
+
+
 static int rx(int x, int y, int rot)
 {
 	float a = rot / 180.0 * M_PI;

sch2fig/text.h

@@ -37,6 +37,7 @@ void text_free(struct text *txt);
 
 void text_set(struct text *txt, const char *s);
 void text_rot(struct text *txt, int deg);
+void text_flip_x(struct text *txt);
 enum text_align text_flip(enum text_align align);
 
 void text_fig(const struct text *txt, int color, unsigned layer);