From 3a3602861226e995d95a8898668cd559c3ca1cf6 Mon Sep 17 00:00:00 2001
From: Benji Dial <benji6283@gmail.com>
Date: Wed, 17 Feb 2021 16:35:02 -0500
Subject: quick bitmap font format, borrowing new default font from X

---
 tools/pbf-gen.rb | 66 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 66 insertions(+)
 create mode 100644 tools/pbf-gen.rb

(limited to 'tools')

diff --git a/tools/pbf-gen.rb b/tools/pbf-gen.rb
new file mode 100644
index 0000000..f4c59c8
--- /dev/null
+++ b/tools/pbf-gen.rb
@@ -0,0 +1,66 @@
+#args: .hex file, .pbf file, hex pitch, char width, char height, hz padding, vt padding
+#converts the .hex output of gbdfed into a pbf file
+#6x9x0x0
+
+bitmaps = {}
+
+File.readlines(ARGV[0]).map do |l|
+  bitmaps[l[0..3].to_i 16] = (l[5..-2].to_i(16) + 2**80).to_s(2)[1..-1]
+end
+
+data_area_entries = {}
+
+bitmaps.each do |cp, bm|
+  lines = bm.scan /.{#{ARGV[2].to_i}}/
+  this_entry = []
+  this_byte = 0
+  byte_mask = 1
+  for y in 0..(ARGV[4].to_i() - 1) do
+    for x in 0..(ARGV[3].to_i() - 1) do
+      if lines[y][x] == '1'
+        this_byte |= byte_mask
+      end
+      byte_mask *= 2
+      if byte_mask == 256
+        byte_mask = 1
+        this_entry << this_byte
+        this_byte = 0
+      end
+    end
+  end
+  if byte_mask != 1
+    this_entry << this_byte
+  end
+  data_area_entries[cp] = this_entry
+end
+
+data_area = []
+
+def put_u32(f, n)
+  f.putc (n % 256)
+  f.putc ((n / 256) % 256)
+  f.putc ((n / 65536) % 256)
+  f.putc ((n / 16777216) % 256)
+end
+
+File.open(ARGV[1], 'wb') do |f|
+  f.putc ARGV[3].to_i
+  f.putc ARGV[4].to_i
+  f.putc ARGV[5].to_i
+  f.putc ARGV[6].to_i
+
+  for cp in 0..255 do
+    if data_area_entries.key? cp
+      put_u32(f, data_area.length)
+      for b in data_area_entries[cp] do
+        data_area << b
+      end
+    else
+      put_u32(f, 0)
+    end
+  end
+
+  for b in data_area do
+    f.putc b
+  end
+end
\ No newline at end of file
-- 
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