Pixel format for BMP output. Requires a BMP output type; passing it with any other output type is rejected.
| Value | Bits | Layout |
|---|---|---|
bgr24 (default) | 24 | Blue, green, red — the standard BMP byte order |
rgb565le | 16 | 5 red / 6 green / 5 blue, little-endian |
gray8 | 8 | Grayscale |