From 96e29061a298cc2be233c1b324e5ea04c88b3e1c Mon Sep 17 00:00:00 2001
From: Thomas Kolb <thomas@tkolb.de>
Date: Tue, 24 Dec 2019 17:28:13 +0100
Subject: [PATCH] font: added conversion verification program

---
 font/verify.c | 45 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 font/verify.c

diff --git a/font/verify.c b/font/verify.c
new file mode 100644
index 0000000..287ae57
--- /dev/null
+++ b/font/verify.c
@@ -0,0 +1,45 @@
+#include <stdio.h>
+
+#include "font16_data.h"
+
+int main(void)
+{
+	FILE *cfile = fopen("characters16.txt", "r");
+
+	if(!cfile) {
+		printf("Failed to open characters16.txt\n");
+		return 1;
+	}
+
+	char characters[256];
+	fgets(characters, 256, cfile);
+	fclose(cfile);
+
+	char *c = characters;
+
+	while(*c) {
+		uint8_t idx = font_lut[(uint8_t)(*c)];
+
+		uint16_t char_start = font_pos[idx];
+		uint16_t char_end = char_start + font_width[idx];
+
+		for(uint16_t char_pos = char_start; char_pos < char_end; char_pos++) {
+
+			uint16_t char_data = font_data[char_pos];
+
+			for(uint8_t y = 0; y < font_height; y++) {
+
+				if(char_data & (1 << y)) {
+					printf("#");
+				} else {
+					printf("-");
+				}
+			}
+
+			printf("\n");
+		}
+
+		printf("\n");
+		c++;
+	}
+}