sch2fig/: support mirrored symbols (matrix -1 0 0 -1)

sch2fig/lib.c

@@ -264,6 +264,13 @@ static void draw_pin(const struct comp *comp, const struct pin_obj *pin,
 	};
 
 	text_rot(&name_txt, matrix_to_angle(m));
+	if (matrix_is_mirrored(m)) {
+		if ((name_txt.rot % 180) == 0)
+			name_txt.hor = text_flip(name_txt.hor);
+		else
+			name_txt.vert = text_flip(name_txt.vert);
+	}
+
 	switch (name_txt.rot) {
 	case 180:
 		text_flip_x(&name_txt);
@@ -295,6 +302,13 @@ static void draw_pin(const struct comp *comp, const struct pin_obj *pin,
 	};
 
 	text_rot(&num_txt, matrix_to_angle(m) % 180);
+	if (matrix_is_mirrored(m)) {
+		if ((num_txt.rot % 180) == 0)
+			num_txt.hor = text_flip(num_txt.hor);
+		else
+			num_txt.vert = text_flip(num_txt.vert);
+	}
+
 	if (comp->show_pin_num)
 		text_fig(&num_txt, COLOR_PIN_NUMBER, LAYER_PIN_NUMBER);
 

sch2fig/misc.c

@@ -14,6 +14,7 @@
 #include <stdbool.h>
 #include <stdlib.h>
 #include <stdio.h>
+#include <assert.h>
 
 #include "misc.h"
 
@@ -34,12 +35,31 @@ unsigned matrix_to_angle(int m[6])
 		return 180;
 	if (eq(m, 0, 1, 1, 0))
 		return 270;
+	if (eq(m, -1, 0, 0, -1))
+		return 0;
 	fprintf(stderr, "unrecognized matrix %d %d %d %d\n",
 	    m[1], m[2], m[4], m[5]);
 	exit(1);
 }
 
 
+bool matrix_is_mirrored(int m[6])
+{
+	if (eq(m, 1, 0, 0, -1))
+		return 0;
+	if (eq(m, 0, -1, -1, 0))
+		return 0;
+	if (eq(m, -1, 0, 0, 1))
+		return 0;
+	if (eq(m, 0, 1, 1, 0))
+		return 0;
+
+	if (eq(m, -1, 0, 0, -1))
+		return 1;
+	assert(0);
+}
+
+
 int angle_add(int a, int b)
 {
 	a += b;

sch2fig/misc.h

@@ -42,6 +42,7 @@ static inline int my(int x, int y, int m[6])
 
 
 unsigned matrix_to_angle(int m[6]);
+bool matrix_is_mirrored(int m[6]);
 int angle_add(int a, int b);
 
 #endif /* !MISC_H */

sch2fig/sch.c

@@ -177,6 +177,13 @@ static void dump_field(const struct sch_field *field, int m[6])
 		break;
 	}
 
+	if (matrix_is_mirrored(m)) {
+		if ((txt.rot % 180) == 0)
+			txt.hor = text_flip(txt.hor);
+		else
+			txt.vert = text_flip(txt.vert);
+	}
+
 	text_fig(&txt, COLOR_FIELD, LAYER_FIELD);
 }