From 9f938ab8ba5af561bd44dbc7142f338ce317a01a Mon Sep 17 00:00:00 2001
From: Sadeep Madurange <sadeep@asciimx.com>
Date: Sat, 1 Nov 2025 09:46:52 +0800
Subject: Etlas project.

---
 scripts/fonttool.py | 91 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 91 insertions(+)
 create mode 100644 scripts/fonttool.py

(limited to 'scripts/fonttool.py')

diff --git a/scripts/fonttool.py b/scripts/fonttool.py
new file mode 100644
index 0000000..a2f1a1e
--- /dev/null
+++ b/scripts/fonttool.py
@@ -0,0 +1,91 @@
+"""
+Converts glyphs in the current directory to a C header.
+
+Usage: python -m fonttool font_24.h 24
+"""
+
+import os
+import re
+import sys
+import subprocess
+
+dst = sys.argv[1]
+font_size = sys.argv[2]
+header = "FONT_{}_H".format(font_size)
+files = [f for f in os.listdir('.') if os.path.isfile(f) and f.endswith(".jpg")]
+files.sort()
+
+with open(dst, "w") as o:
+    o.write("#ifndef {}\n".format(header))
+    o.write("#define {}\n\n".format(header))
+
+    for i, src in enumerate(files):    
+        id = src.split('.')[0]
+    
+        rv = subprocess.run(
+            ["identify", "-ping", "-format", "%w %h", src],
+            capture_output=True,
+            text=True
+        )
+        
+        dim = rv.stdout.split(' ')
+        width = int(dim[0])
+        height = int(dim[1])
+
+        print("Image={}, size={}x{}".format(src, width, height))
+    
+        if i == 0:
+            o.write("int font_{0}_height = {1};\n\n".format(font_size, height))
+            
+        subprocess.run(["convert", src, "-threshold", "80%", "mon.jpg"])
+        subprocess.run(["convert", "mon.jpg", "-depth", "1", "-format", "'txt'", "mon.txt"])
+    
+        n = 7
+        x = 0
+        column_len = 0
+        byte_count = 0
+    
+        res = width * height
+        image_size = (res // 8) + (res % 8 > 0) 
+    
+        o.write("int {0}_width = {1};\n\n".format(id, width))
+        o.write("unsigned char {0}_bmp[{1}] = {{\n\t".format(id, image_size))
+        
+        with open("mon.txt", "r") as fd:
+            fd.readline()
+            for line in fd:
+                px = re.search("\([^\)]+\)", line).group()
+                if px == "(0)":                        
+                    x |= (1 << n)
+
+                n -= 1
+
+                if n < 0:
+                    o.write("0x{:02X}, ".format(x))
+
+                    column_len += 1
+                    byte_count += 1
+
+                    if column_len >= 12:
+                        o.write("\n\t")
+                        column_len = 0
+
+                    x = 0
+                    n = 7
+
+            if res % 8 != 0:
+                o.write("0x{:02X}, ".format(x))
+                byte_count += 1
+
+        o.write("\n};\n\n")
+
+        if (image_size != byte_count):
+            raise Exception("Detected image size {} and bytes written {} not equal".format(image_size, byte_count))
+                
+
+    o.write("#endif")
+        
+os.remove("mon.jpg")
+os.remove("mon.txt")
+    
+print("Wrote {} bytes of image data to {}".format(byte_count, dst))
-- 
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