WIP: tools: Simple RLE encoder

1 files changed, 51 insertions, 0 deletions

diff --git a/tools/rle_encode.py b/tools/rle_encode.py
new file mode 100644
index 0000000..3117ee1
--- /dev/null
+++ b/tools/rle_encode.py
@@ -0,0 +1,51 @@
+from PIL import Image
+
+im = Image.open('pine64.png')
+pixels = im.load()
+
+rle = []
+rl = 0
+px = 0
+    
+for y in range(im.height):
+    for x in range(im.width):
+        newpx = pixels[x, y]
+        if newpx == px:
+            rl += 1
+            continue
+        assert(rl < 255)
+        rle.append(rl)
+        rl = 1
+        px = newpx
+rle.append(rl)
+
+sx = 240
+sy = 240
+image = bytes(rle)
+
+
+data = bytearray(2*sx)
+dp = 0
+black = ord('#')
+white = ord(' ')
+color = black
+
+for rl in image:
+    while rl:
+        data[dp] = color
+        data[dp+1] = color
+        dp += 2
+        rl -= 1
+
+        if dp >= (2*sx):
+            print(data.decode('utf-8'))
+            dp = 0
+
+    if color == black:
+        color = white
+    else:
+        color = black
+
+assert(dp == 0)
+
+print(image)