tools: rle_encode: Implement proper argument parsing

tools/rle_encode.py

@@ -1,5 +1,6 @@
 #!/usr/bin/env python3
 
+import argparse
 import sys
 from PIL import Image
 
@@ -32,6 +33,20 @@ def encode(im):
 
     return (im.width, im.height, bytes(rle))
 
+def render_c(image, fname):
+    print(f'// 1-bit RLE, generated from {fname}, {len(image[2])} bytes')
+    print('static const uint8_t rle[] = {\n ', end='')
+    i = 0
+    for rl in image[2]:
+        print(f' {hex(rl)},', end='')
+
+        i += 1
+        if i == 12:
+            print('\n ', end='')
+            i = 0
+
+    print('\n};')
+
 def decode_to_ascii(image):
     (sx, sy, rle) = image
     data = bytearray(2*sx)
@@ -59,9 +74,26 @@ def decode_to_ascii(image):
     # Check the image is the correct length
     assert(dp == 0)
 
-image = encode(Image.open(sys.argv[1]))
-# This is kinda cool for testing but let's leave this disabled until we add
-# proper argument processing!
-#decode_to_ascii(image)
-print(f'# 1-bit RLE, generated from {sys.argv[1]}')
-print(image)
+
+
+parser = argparse.ArgumentParser(description='RLE encoder tool.')
+parser.add_argument('files', nargs='+',
+                    help='files to be encoded')
+parser.add_argument('--ascii', action='store_true',
+                    help='Run the resulting image(s) through an ascii art decoder')
+parser.add_argument('--c', action='store_true',
+                    help='Render the output as C instead of python')
+args = parser.parse_args()
+
+for fname in args.files:
+    image = encode(Image.open(fname))
+
+    if args.c:
+        render_c(image, fname)
+    else:
+        print(f'# 1-bit RLE, generated from {fname}, {len(image[2])} bytes')
+        print(f'rle = {image}')
+
+    if args.ascii:
+        print()
+        decode_to_ascii(image)