Add ZEICHENSATZ dumper

1 files changed, 71 insertions, 0 deletions

diff --git a/convertCharset.py b/convertCharset.py
new file mode 100755
index 0000000..59163aa
--- /dev/null
+++ b/convertCharset.py
@@ -0,0 +1,71 @@
+#!/usr/bin/env python3
+
+"""
+Convert file ZEICHENSATZ from graphics package to PNG files
+"""
+
+from eumel import *
+
+class ZeichensatzDataspace(Dataspace):
+    TYPE = 0x44c
+
+    def __init__ (self, fd):
+        Dataspace.__init__ (self, fd)
+        
+        # just an array with 255 elements
+        self.rows = []
+        for i in range (255):
+            self.rows.append (self.parseText ())
+        self.parseHeap ()
+
+if __name__ == '__main__':
+    import argparse, sys, cairo, math
+
+    def transform (w, h, x, y):
+        return ((2+x), (11-y))
+
+    parser = argparse.ArgumentParser(description='Convert ZEICHENSATZ dataspace to PNG')
+    parser.add_argument ('-v', '--verbose', help='Enable debugging messages', action='store_true')
+    parser.add_argument ('file', help='Input file')
+    parser.add_argument ('prefix', help='Output prefix')
+    args = parser.parse_args ()
+
+    if args.verbose:
+        logging.basicConfig (level=logging.DEBUG)
+    else:
+        logging.basicConfig (level=logging.WARNING)
+
+    m = []
+    with open (args.file, 'rb') as fd:
+        ds = ZeichensatzDataspace (fd)
+        # no character with code 0
+        for (j, r) in zip (range (1, len (ds.rows)+1), ds.rows):
+            if len (r) == 0:
+                continue
+
+            out = '{}{:03d}.png'.format (args.prefix, j)
+            logging.info ('Converting character {} to {}'.format (j, out))
+            w, h = 1024, 1024
+            surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, w, h)
+            ctx = cairo.Context(surface)
+            ctx.scale (64, 64)
+            ctx.set_line_width (0.1)
+            ctx.set_source_rgb (1, 0, 0)
+
+            r = bytes (r)
+            lastxy = (0, 0)
+            for i in range (0, len (r), 4):
+                x0, y0, x1, y1 = struct.unpack ('<bbbb', r[i:i+4])
+                m.extend ([x0, y0, x1, y1])
+                if (x0, y0) != lastxy:
+                    ctx.move_to (*transform (w, h, x0, y0))
+                if (x0, y0) != (x1, y1):
+                    ctx.line_to (*transform (w, h, x1, y1))
+                else:
+                    x1, y1 = transform (w, h, x1, y1)
+                    ctx.arc (x1, y1, 0.1, 0, 2*math.pi)
+                lastxy = (x1, y1)
+            ctx.stroke ()
+
+            surface.write_to_png (out)
+