From 2300d2813a524cbfeabac794335e7abe99263df6 Mon Sep 17 00:00:00 2001
From: "B. Watson" <yalhcru@gmail.com>
Date: Tue, 29 Dec 2015 23:10:50 -0500
Subject: initial commit

---
 bitmapdump.pl | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100755 bitmapdump.pl

(limited to 'bitmapdump.pl')

diff --git a/bitmapdump.pl b/bitmapdump.pl
new file mode 100755
index 0000000..fb44a6f
--- /dev/null
+++ b/bitmapdump.pl
@@ -0,0 +1,34 @@
+#!/usr/bin/perl -w
+
+# browse through a binary file looking for bitmapped graphics,
+# especially fonts
+
+# user is expected to pipe through less
+
+$height = 8; # how many rows to display per block
+$width  = 8; # how many blocks to display per line
+
+undef $/;
+$data = <>;
+
+for($offs=0; $offs<length($data); $offs += ($height * $width)) {
+	for my $char (0..$width-1) {
+		printf("%7x ", $offs + ($char * $height));
+		printf("%2x", $offs / $height + $char);
+	}
+
+	print "\n";
+
+	for my $line (0..$height-1) {
+		for my $char (0..$width-1) {
+			my $index = $offs + $line + ($char * $height);
+			if($index < length($data)) {
+				my $bitmap = sprintf("  %08b", ord(substr($data, $index, 1)));
+				$bitmap =~ s/0/./g;
+				$bitmap =~ s/1/X/g;
+				print $bitmap;
+			}
+		}
+		print "\n";
+	}
+}
-- 
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