Wox-launcher/Wox · error · SystemExit

{path} is not a PNG file

Error message

{path} is not a PNG file

What it means

Error "{path} is not a PNG file" thrown in Wox-launcher/Wox.

Source

Thrown at assets/generate_app_icons.sh:72

def paeth(left, up, up_left):
    estimate = left + up - up_left
    distance_left = abs(estimate - left)
    distance_up = abs(estimate - up)
    distance_up_left = abs(estimate - up_left)
    if distance_left <= distance_up and distance_left <= distance_up_left:
        return left
    if distance_up <= distance_up_left:
        return up
    return up_left


def decode_png(path):
    # Decode common 8-bit non-interlaced PNG files into straight RGBA bytes.
    with open(path, "rb") as handle:
        data = handle.read()

    if not data.startswith(b"\x89PNG\r\n\x1a\n"):
        raise SystemExit(f"{path} is not a PNG file")

    width = None
    height = None
    bit_depth = None
    color_type = None
    palette = None
    transparency = b""
    idat = bytearray()
    offset = 8

    while offset < len(data):
        length = struct.unpack(">I", data[offset : offset + 4])[0]
        offset += 4
        kind = data[offset : offset + 4]
        offset += 4
        payload = data[offset : offset + length]
        offset += length
        offset += 4

View on GitHub (pinned to 1659730fcb)

When it happens

Trigger: Thrown at assets/generate_app_icons.sh:72 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of Wox-launcher/Wox@1659730fcb (2026-08-15). Data as JSON: /api/errors/b44400577c1714c9. Report an issue: GitHub.