BDF to Adafruit font converter script added. The script was changed from the original to output the font bitmaps in compressed format.

fontconvert/bdf2adafruit.py

@@ -0,0 +1,135 @@
+#!/usr/bin/python2
+
+# MIT License.
+
+# Copyright (c) 2016 William Skellenger
+# 
+# Permission is hereby granted, free of charge, to any person obtaining a 
+# copy of this software and associated documentation files (the "Software"), 
+# to deal in the Software without restriction, including without limitation 
+# the rights to use, copy, modify, merge, publish, distribute, sublicense, 
+# and/or sell copies of the Software, and to permit persons to whom the 
+# Software is furnished to do so, subject to the following conditions:
+# 
+# The above copyright notice and this permission notice shall be included 
+# in all copies or substantial portions of the Software.
+# 
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 
+# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
+# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 
+# IN THE SOFTWARE.
+
+# This small script is designed to mostly take a BDF file and convert it to a
+# format that can largely be cut/pasted as an Adafruit-format font.
+# It was written in an hour or so and did what I needed it to do.
+# I used it for one file.  Maybe it bombs on other files.
+# William Skellenger, Feb 2016
+# (email: williamj@skellenger.net)
+# (Twitter: @skelliam)
+#
+# Usage: bdf2adafruit.py <somefont.bdf> > out.txt
+#
+# Once you have out.txt you can cut/paste the contents into a new font 
+# header file as part of the Adafruit GFX library.
+
+import sys
+
+myfile = open(sys.argv[1])
+
+processing = 0
+getting_rows = 0
+
+chars = []
+bitmapData = []
+
+class Glyph:
+    encoding = -1
+    rows = []
+    comment = ""
+    offset = -1
+    width = 0
+    height = 0
+    advance = 0
+    xoffs = 0
+    yoffs = 0 
+    def __init__(self, comment):
+        self.comment = comment
+        self.rows = []
+
+for line in myfile.readlines():
+    if 'STARTCHAR' in line:
+        processing = 1
+        vals = line.split()
+        g = Glyph(vals[1])
+        #g.width = 8  #in this example always 8 bits wide
+    elif 'ENDCHAR' in line:
+        dataByteCompressed = 0
+        dataByteCompressedIndex = 8
+        g.height = len(bitmapData)
+        for value in bitmapData:
+            bitIndex = 0
+            while bitIndex < g.width:
+                bit = (value >> (7 - bitIndex)) & 0x01
+                dataByteCompressed |= bit << (dataByteCompressedIndex - 1)
+                dataByteCompressedIndex -= 1
+                if dataByteCompressedIndex == 0:
+                    dataByteCompressedIndex = 8
+                    g.rows.append(dataByteCompressed)
+                    dataByteCompressed = 0
+                bitIndex += 1
+        if 8 != dataByteCompressedIndex:
+            g.rows.append(dataByteCompressed)
+
+        chars.append(g)  #append the completed glyph into list
+        processing = 0
+        getting_rows = 0
+        bitmapData.clear()
+
+    if processing:
+        if 'ENCODING' in line:
+            vals = line.split()
+            g.encoding = int(vals[1])
+        elif 'DWIDTH' in line:
+            vals = line.split()
+            #g.advance = int(vals[1])  #cursor advance seems to be the first number in DWIDTH
+        elif 'BBX' in line:
+            vals = line.split()
+            g.xoffs = 0
+            g.yoffs = -(int(vals[2]) + int(vals[4]))
+            g.advance = (int(vals[1]) + 1)  #x bounding box + 1
+            g.width = int(vals[1])
+        elif 'BITMAP' in line:
+            getting_rows = 1
+        elif getting_rows:
+            #g.rows.append(int(line, 16))  #append pixel rows into glyph's list of rows
+            bitmapData.append(int(line, 16))
+
+print 
+
+i=0
+for char in chars:
+    char.offset = i
+    print("\t", end='')
+    num = 3
+    for row in char.rows:
+        if num != 3:
+            print(" ", end = '')
+        print("0x%02X," %(row), end = ''),
+        i+=1
+        num-=1
+
+    if num == 1:
+        print("\t\t", end = '')
+    if num == 2:
+        print("\t\t\t", end = '')
+    print("\t/* 0x%02X %s */" %(char.encoding, char.comment))
+
+for char in chars:
+    # offset, bit-width, bit-height, advance cursor, x offset, y offset 
+    print("\t{ %d, %d, %d, %d, %d, %d }, /* 0x%02X %s */" %(
+            char.offset, char.width, char.height, 
+            char.advance, char.xoffs, char.yoffs, 
+            char.encoding, char.comment))