From f54e7e8c2aeb4fafebf0d5bd5570b060462c9ecf Mon Sep 17 00:00:00 2001
From: Jari Vetoniemi <mailroxas@gmail.com>
Date: Thu, 1 Feb 2018 08:31:01 +0200
Subject: Initial commit

---
 font/tools/bdf2c.awk | 86 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 86 insertions(+)
 create mode 100755 font/tools/bdf2c.awk

(limited to 'font/tools/bdf2c.awk')

diff --git a/font/tools/bdf2c.awk b/font/tools/bdf2c.awk
new file mode 100755
index 0000000..0f58167
--- /dev/null
+++ b/font/tools/bdf2c.awk
@@ -0,0 +1,86 @@
+#!/bin/gawk -f
+# Converts bdf to nice C header
+# Glyphs should all have the same height, but width can vary
+#
+# Put this in "font.h":
+#
+# #pragma once
+#
+# #include <stdint.h>
+# #include <stddef.h>
+#
+# struct glyph {
+#    size_t offset;
+#    uint8_t width;
+# };
+#
+# struct font {
+#    const struct glyph *ucs2glyph;
+#    const uint8_t *data;
+#    size_t max_ucs;
+#    uint8_t height;
+# };
+
+BEGIN {
+   bbx = 0
+   offset = 0
+   max_ucs = 0
+   encoding = 0
+   font = "unnamed"
+   print "#pragma once"
+   print "#include \"font.h\""
+}
+
+/^FONT / {
+   gsub(/-/, "_", $2)
+   font = $2
+}
+
+/^ENCODING / {
+   idx2ucs[encoding] = $2
+   idx2ucs_offset[encoding++] = offset
+   if ($2 > max_ucs)
+      max_ucs = $2
+}
+
+/^BBX / {
+   widths[bbx++] = $2
+   height = $3
+}
+
+/^ENDCHAR/ {
+   bitmap = 0
+}
+
+bitmap {
+   for (i = 1; i <= NF; ++i) {
+      for (s = 0; s < length($1); s += 2) {
+         data = data "0x" substr($1, s, 2) ","
+         ++offset
+      }
+   }
+}
+
+/^BITMAP/ {
+   bitmap = 1
+}
+
+END {
+   print "static const uint8_t " font "_data[] = {"
+   filter = "awk -F',' -v OFS=',' -v n=24 '{for (i=n+1; i<=NF; i+=n) $i = \"\\n\" $i; print}'"
+   print data | filter
+   close(filter)
+   print "};"
+
+   print "static const struct glyph " font "_glyph[] = {"
+   for (i in idx2ucs)
+   print "[" idx2ucs[i] "] = { .offset = " idx2ucs_offset[i] ", .width = " widths[i] " },"
+   print "};"
+
+   print "static const struct font " font " = {"
+   print ".ucs2glyph = " font "_glyph,"
+   print ".data = " font "_data,"
+   print ".max_ucs = " max_ucs ","
+   print ".height = " height
+   print "};"
+}
-- 
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