main

framebuffer.py

@@ -0,0 +1,24 @@
+class Framebuffer(object):
+    def __init__(self, device_no: int):
+        self.path = "/dev/fb%d" % device_no
+        config_dir = "/sys/class/graphics/fb%d/" % device_no
+        self.size = tuple(_read_and_convert_to_ints(
+            config_dir + "/virtual_size"))
+        self.stride = _read_and_convert_to_ints(config_dir + "/stride")[0]
+        self.bits_per_pixel = _read_and_convert_to_ints(
+            config_dir + "/bits_per_pixel")[0]
+        assert self.stride == self.bits_per_pixel // 8 * self.size[0]
+    def __str__(self):
+        args = (self.path, self.size, self.stride, self.bits_per_pixel)
+        return "%s  size:%s  stride:%s  bits_per_pixel:%s" % args
+    # Note: performance is terrible even for medium resolutions
+    def show(self, image: Image):
+        converter = _CONVERTER[(image.mode, self.bits_per_pixel)]
+        assert image.size == self.size
+        out = converter(image)
+        with open(self.path, "wb") as fp:
+            fp.write(out)
+    def on(self):
+        pass
+    def off(self):
+        pass

main.py

@@ -0,0 +1,15 @@
+import clock_pillow
+from framebuffer import Framebuffer
+import time
+
+
+def main():
+    fb = Framebuffer()
+    while True:
+        img = clock_pillow.draw_clock(pixelformat="RGB", aliasing=4)
+        fb.show(img)
+        time.sleep(0.1)
+
+
+if __name__ == "__main__":
+    main()