init

send.py

@@ -0,0 +1,75 @@
+import socket
+import sys
+from pprint import pprint
+import os.path
+
+from PIL import Image, ImageDraw, ImageFont
+
+
+try:
+    _, device, img_file = sys.argv
+except:
+    print("usage: send.py [bl:ue:to:ot:h0] [filename.png]")
+    exit(1)
+
+# -- handle image
+
+if os.path.isfile(img_file):
+    img = Image.open(img_file)
+else:
+    img = Image.new("1", (384, 240), color=1)
+    draw = ImageDraw.Draw(img)
+    for size in range(100, 1, -1):
+        font = ImageFont.truetype(
+            font="/usr/share/fonts/OTF/CascadiaCode-Regular.otf", size=size
+        )
+        if draw.textlength(img_file, font=font) <= 323:
+            break
+    draw.text((10, 10), img_file, font=font)
+
+if img.height > img.width:
+    img = img.transpose(Image.ROTATE_90)
+
+if 323 / img.width * img.height <= 240:
+    img = img.resize(size=(323, int(323 / img.width * img.height)))
+else:
+    img = img.resize(size=(int(240 / img.height * img.width), 240))
+
+imgborder = Image.new("1", (384, 240), color=1)
+imgborder.paste(img, (61, 0))
+img = imgborder
+
+# -- print
+
+buf = []
+buf += [0x1B, 0x40]
+buf += [0x1D, 0x76, 0x30, 0x0]
+
+width = img.width
+height = img.height
+width8 = width // 8
+
+buf += [width8 & 0xFF, width8 >> 8]
+buf += [height & 0xFF, height >> 8]
+
+ibuf = [0] * height * width8
+for y in range(height):
+    for x in range(width):
+        if img.getpixel((x, y)) == 0:
+            ibuf[x // 8 + y * width8] |= 1 << (7 - (x & 7))
+ibuf = [b if b != 0x0A else 0x14 for b in ibuf]
+
+buf += ibuf
+
+# -- send
+
+with open("out.bin", "wb") as f:
+    f.write(bytes(buf))
+exit(1)
+
+sock = socket.socket(socket.AF_BLUETOOTH, socket.SOCK_STREAM, socket.BTPROTO_RFCOMM)
+sock.bind((socket.BDADDR_ANY, 1))
+sock.connect((device, 1))
+sock.sendall(bytes(buf))
+sock.recv(1024)
+sock.close()