Signatures
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| External signatures |
File extension: xwd
File extension: xdm
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| Internal signatures |
| Name |
X-Windows Screen Dump X11 |
| Description |
Header starts with 4-byte integers: Length (100 [+ filename length]); Version (7); Format (0 - 1-bit XYBitmap, 1 - single-plane XYPixmap, 2 - multi-plane Zpixmap); Depth (1-32); Width; Height; XOffset; Byte Order (0 - least significant byte first, 1 - most significant byte first); Unit Size (8,16,32); Bit Order (0 - least significant bit first, 1 - most significant bit first); Padding Bits (8,16,32); Bits Per Pixel (1-16,24,32); Bytes Per Line; Class (0 - static grey, 1 - grey scale, 2 - static colour, 3 - pseudocolour, 4 - true colour, 5 - direct colour). |
| Byte sequences |
| Position type |
Absolute from BOF |
| Offset |
0 |
| Byte order |
Big-endian |
| Value |
000000??00000007000000(00|01|02)000000[01:20]{12}000000(00|01)000000(08|10|20)000000(00|01)000000(08|10|20)000000(01|02|03|04|05|06|07|08|09|0A|0B|0C|0D|0E|0F|10|18|20){4}000000[00:05] |
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Details: File format summary
: detailed report on file format 
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