DGT2 data format

■File layout

offset	size	function
$00	word	identifier
$02	$04	image size
$06	variable	CLUT (present if required)
variable	variable	bitmap data

◆Identifier

"PP"	Palette mode 256 colors/32768 colors
"DC"	RGB mode 32768 colors
"RL"	Run length mode 256 colors/32768 colors
"FP"	Palette mode 256 colors/approximately 16.77 million colors
"FC"	RGB mode approximately 16.77 million colors
"pp"	Palette mode 16 colors/32768 colors
"fp"	Palette mode 16 colors/approximately 16.77 million colors

◆Image size

offset	size	Explanation
$00	word	H image size
$02	word	V image size

◆CLUT

Exists in palette mode and run length mode.

offset	size	function
$00	word or Long x number of pallets (16 or 256)	CLUT data

●For "PP"/"RL" mode, number of pallets = 256 For "pp" mode, number of pallets = 16

MSB     Color data            LSB
│ │ Blue │ Green │ Red │
┌─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┐
│*│4│3│2│1│0│4│3│2│1│0│4│3│2│1│0│
└─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┘

●For "FP" mode, number of pallets = 256 For "fp" mode, number of pallets = 16

MSB             │ Color code
│               │     Blue      │
┌─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┐
│*│−│−│−│−│−│−│−│7│6│5│4│3│2│1│0│
└─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┘
　
                              LSB
│     Green     │     Red       │
┌─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┐
│7│6│5│4│3│2│1│0│7│6│5│4│3│2│1│0│
└─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┘

* = Can be set freely (usually = 1b)

◆Bitmap data

offset	size	function
From $00	variable	bitmap data

●For "PP"/"FP" mode: 8bit/dot

MSB           LSB
│ Palette code  │
┌─┬─┬─┬─┬─┬─┬─┬─┐
│7│6│5│4│3│2│1│0│
└─┴─┴─┴─┴─┴─┴─┴─┘

●For "DC" mode: 16bit/dot

MSB        Color data         LSB
│ │  Blue   │  Green  │   Red   │
┌─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┐
│*│4│3│2│1│0│4│3│2│1│0│4│3│2│1│0│
└─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┘

* = Can be set freely (usually = 1b)

●For "FC" mode: 32bit/dot

MSB             │ Color code
│               │     Blue      │
┌─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┐
│*│−│−│−│−│−│−│−│7│6│5│4│3│2│1│0│
└─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┘
　
                              LSB
│    Green      │      Red      │
┌─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┐
│7│6│5│4│3│2│1│0│7│6│5│4│3│2│1│0│
└─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┘

* = Can be set freely (usually = 1b)

●For "pp"/"fp" mode: 4bit/dot

MSB                           LSB
│Even coordinate│Odd coordinate │
│code           │code           │
┌───┬───┬───┬───┬───┬───┬───┬───┐
│ 3 │ 2 │ 1 │ 0 │ 3 │ 2 │ 1 │ 0 │
└───┴───┴───┴───┴───┴───┴───┴───┘

●For "RL" mode:


MSB                           LSB
│   Run length  │ CLUT index num│
┌─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┐
│7│6│5│4│3│2│1│0│7│6│5│4│3│2│1│0│
└─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┘

★ Graphic Tools Guide ★ Format list