Alias PIX Image

import magic
import struct

# Libmagic usually fails to identify Alias PIX, defaulting to 'application/octet-stream'.
print(magic.from_file('render.pix', mime=True))

# Manual header check:
with open('render.pix', 'rb') as f:
    header = f.read(10)
    if len(header) == 10:
        width, height, xoff, yoff, bpp = struct.unpack('>hhhhh', header)
        is_pix = (bpp == 24) # 24-bit RGB PIX
        print('Is Alias PIX:', is_pix)

const fs = require('fs');
// Alias PIX lacks magic bytes. Check the 10-byte header manually for the bit-depth flag.
const buffer = Buffer.alloc(10);
const fd = fs.openSync('render.pix', 'r');
fs.readSync(fd, buffer, 0, 10, 0);
fs.closeSync(fd);
// Check if bytes 8 and 9 indicate 24-bit color (0x0018)
const isAliasPix = buffer[8] === 0x00 && buffer[9] === 0x18;
console.log('Is Alias PIX:', isAliasPix);

import (
    "bytes"
    "net/http"
)
// http.DetectContentType cannot detect Alias PIX natively.
// A custom check on the 10-byte header is required to verify the bit-depth flag at offset 8.
// isAliasPix := len(buf) >= 10 && buf[8] == 0x00 && buf[9] == 0x18

$mime = mime_content_type('render.pix');
echo $mime; // Without a magic signature, standard PHP setups will resolve this to 'application/octet-stream' or falsely map the extension.