From 8ddecc892008d73317092332a20bca95a0402fd7 Mon Sep 17 00:00:00 2001
From: Jeff Epler <jepler@unpythonic.net>
Date: Thu, 13 Jul 2017 14:28:26 -0500
Subject: [PATCH] Makefile: generate font image programmatically

---
 Makefile     | 18 +++++++++++++++++
 charset.cfg  |  7 +++++++
 mkfontimg.py | 55 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 80 insertions(+)
 create mode 100644 charset.cfg
 create mode 100644 mkfontimg.py

diff --git a/Makefile b/Makefile
index 91cf694..161845e 100755
--- a/Makefile
+++ b/Makefile
@@ -1,12 +1,30 @@
 .PHONY: all
 all: 80columns-compressed.prg 80c2-compressed.prg 80c3-compressed.prg 80c4-compressed.prg
 
+.INTERMEDIATE: charset.bin
+charset.bin: charset.o charset.cfg
+	ld65 -C charset.cfg $< -o $@
+
+charset%.bin: charset%.o charset.cfg
+	ld65 -C charset.cfg $< -o $@
+
 %-compressed.prg: %-uncompressed.prg
 	exomizer sfx 51200 -q -n -o $@ $<
 
 %-uncompressed.prg: %.bin
 	(printf '\0\310'; cat $<) > $@
 
+.PHONY: update-font-images
+update-font-images: charset.bin charset2.bin charset3.bin charset4.bin mkfontimg.py
+	python mkfontimg.py -l charset.bin  img/t1.png
+	python mkfontimg.py    charset.bin  img/g1.png
+	python mkfontimg.py -l charset2.bin img/t2.png
+	python mkfontimg.py    charset2.bin img/g2.png
+	python mkfontimg.py -l charset3.bin img/t3.png
+	python mkfontimg.py    charset3.bin img/g3.png
+	python mkfontimg.py -l charset4.bin img/t4.png
+	python mkfontimg.py    charset4.bin img/g4.png
+
 .INTERMEDIATE: 80columns.bin
 80columns.bin: 80columns.o charset.o 80columns.cfg
 	ld65 -C 80columns.cfg $(filter %.o,$^) -o $@
diff --git a/charset.cfg b/charset.cfg
new file mode 100644
index 0000000..7306344
--- /dev/null
+++ b/charset.cfg
@@ -0,0 +1,7 @@
+MEMORY {
+	CHARSET: start = $D000, size = $0800, fill=no;
+}
+
+SEGMENTS {
+	CHARSET: load = CHARSET, type = ro;
+}
diff --git a/mkfontimg.py b/mkfontimg.py
new file mode 100644
index 0000000..9c15da4
--- /dev/null
+++ b/mkfontimg.py
@@ -0,0 +1,55 @@
+#!/usr/bin/python
+import sys
+import PIL.Image as Image
+
+text = """\
+10 poke53280,0:poke53281,1
+20 print"\xd0\xd3";
+30 fory=0to7
+40 forx=0to15
+50 poke49152+111+x+80*y,x+16*y
+60 next
+70 next
+80 list"""
+
+lowercase = False
+if sys.argv[1] == '-l':
+    lowercase = True
+    del sys.argv[1]
+
+def toscreencode(ch):
+    cc = ord(ch)
+    if '`' <= ch <= '~': return cc - 96
+    return cc
+
+charset = map(ord, open(sys.argv[1]).read())
+
+
+def putcat(img, r, c, code, lowercase):
+    inverse = code & 128
+    code = code % 128
+    idx = code*8
+    for y in range(8):
+        data = charset[idx+y+lowercase*1024]
+        if not inverse: data = ~data
+        for x in range(4):
+            img.putpixel((4*c+x,8*r+y), data & (1<<(3-x)))
+
+img = Image.frombytes('1', (188,64), '\xff' * 188*64)
+
+r=c=0
+for ch in text:
+    if ch == '\n':
+        r = r + 1
+        c = 0
+        continue 
+    putcat(img, r, c, toscreencode(ch), lowercase)
+    c = c + 1
+    if c == 80:
+        r = r + 1
+        c = 0
+for r in range(8):
+    for c in range(16):
+        putcat(img, r, c+31, r*16+c, lowercase)
+
+img.save(sys.argv[2])