Difference between revisions of "FF7/Field/Palette"
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Qhimm>Myst6re (Many corrections) |
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=== Section 4: Palette ([[User:Terence Fergusson|Terence Fergusson]]) === | === Section 4: Palette ([[User:Terence Fergusson|Terence Fergusson]] & [[User:Myst6re|myst6re]]) === | ||
The following is an overview of the palette data. | The following is an overview of the palette data. | ||
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|- | |- | ||
|style="background:rgb(255,255,255)" | 0x00 | |style="background:rgb(255,255,255)" | 0x00 | ||
|style="background:rgb(255,255,255)" | | |style="background:rgb(255,255,255)" | 4 bytes | ||
|style="background:rgb(255,255,255)" | Length (Repeat of previous length header) | |style="background:rgb(255,255,255)" | Length (Repeat of previous length header) | ||
|- | |- | ||
|style="background:rgb(255,255,204)" | | |style="background:rgb(255,255,204)" | 0x04 | ||
|style="background:rgb(255,255,204)" | 2 bytes | |style="background:rgb(255,255,204)" | 2 bytes | ||
|style="background:rgb(255,255,204)" | Unknown (often blank) | |style="background:rgb(255,255,204)" | Unknown (often blank) | ||
|- | |- | ||
|style="background:rgb(255,255, | |style="background:rgb(255,255,204)" | 0x06 | ||
|style="background:rgb(255,255, | |style="background:rgb(255,255,204)" | 2 bytes | ||
|style="background:rgb(255,255, | |style="background:rgb(255,255,204)" | Unknown | ||
|- | |- | ||
|style="background:rgb(255,255, | |style="background:rgb(255,255,255)" | 0x08 | ||
|style="background:rgb(255,255, | |style="background:rgb(255,255,255)" | 2 bytes | ||
|style="background:rgb(255,255, | |style="background:rgb(255,255,255)" | Number of colors in palette | ||
|- | |- | ||
|style="background:rgb(255,255,255)" | 0x0A | |style="background:rgb(255,255,255)" | 0x0A | ||
|style="background:rgb(255,255,255)" | | |style="background:rgb(255,255,255)" | 2 bytes | ||
|style="background:rgb(255,255,255)" | Number of palettes | |||
|- | |||
|style="background:rgb(255,255,255)" | 0x0C | |||
|style="background:rgb(255,255,255)" | (Number of palettes) * (Number of colors in palette) * 2 | |||
|style="background:rgb(255,255,255)" | Palette data | |style="background:rgb(255,255,255)" | Palette data | ||
|} | |} | ||
After the first length indicator comes another integer, also indicating length. Useless, but it's there. | After the first length indicator comes another integer, also indicating length. Useless, but it's there. | ||
Then there's one more integer; unknown purpose. | Then there's one more integer; unknown purpose. | ||
Then | Then two bytes; unknown (blank often). | ||
Then | Then two bytes again; unknown (always 480). | ||
Then two bytes; number of colors in the palette (always 256). | |||
Then two bytes; number of palettes. | |||
Then the actual palette data. | Then the actual palette data. | ||
Each palette entry is a 16-bit color. This is unusual - normally palettes store as high quality data as possible, usually 24/32 bit. However since FF7 only ever runs in 16 bit I guess there isn't much point storing any other kind of data. Actually, the data is 15-bit (5-bit | Each palette entry is a 16-bit color. This is unusual - normally palettes store as high quality data as possible, usually 24/32 bit. However since FF7 only ever runs in 16 bit I guess there isn't much point storing any other kind of data. Actually, the data is 15-bit (1 mask bit, 5-bit Blue, 5-bit Green and 5-bit Red). | ||
{| border="0" cellspacing="1" cellpadding="3" style="background: rgb(0,0,0)" align="center" | {| border="0" cellspacing="1" cellpadding="3" style="background: rgb(0,0,0)" align="center" | ||
! style="background:rgb(204,204,204)" align="center" colspan="16" | Palette Data | ! style="background:rgb(204,204,204)" align="center" colspan="16" | Palette Data | ||
|- | |- | ||
|style="background:rgb(255,255,255)" colspan="5" | | |style="background:rgb(255,255,255)" colspan="1" | Mask | ||
|style="background:rgb(255,255,255)" colspan="5" | Blue | |||
|style="background:rgb(255,255,255)" colspan="5" | Green | |style="background:rgb(255,255,255)" colspan="5" | Green | ||
|style="background:rgb(255,255,255)" colspan="5" | | |style="background:rgb(255,255,255)" colspan="5" | Red (LSB) | ||
|- | |- | ||
|style="background:rgb(255,255,255)" align="center" | m | |style="background:rgb(255,255,255)" align="center" | m | ||
|style="background:rgb(255,255,255);color:blue" | b | |||
|style="background:rgb(255,255,255);color:blue" | b | |||
|style="background:rgb(255,255,255);color:blue" | b | |||
|style="background:rgb(255,255,255);color:blue" | b | |||
|style="background:rgb(255,255,255);color:blue" | b | |||
|style="background:rgb(255,255,255);color:green" | g | |||
|style="background:rgb(255,255,255);color:green" | g | |||
|style="background:rgb(255,255,255);color:green" | g | |||
|style="background:rgb(255,255,255);color:green" | g | |||
|style="background:rgb(255,255,255);color:green" | g | |||
|style="background:rgb(255,255,255);color:red" | r | |||
|style="background:rgb(255,255,255);color:red" | r | |||
|style="background:rgb(255,255,255);color:red" | r | |||
|style="background:rgb(255,255,255);color:red" | r | |||
|style="background:rgb(255,255,255);color:red" | r | |||
|} | |} | ||
Palettes generally contain a number of colors that's a multiple of 256. This is because the palette is split up into 256-color 'pages' internally. So the first color is page 0/color 0. Color 256 is page 1/color 0. Color 628 is page 2/color 116. You'll see why in the [[FF7/Field/Background|background]] section. | Palettes generally contain a number of colors that's a multiple of 256. This is because the palette is split up into 256-color 'pages' internally. So the first color is page 0/color 0. Color 256 is page 1/color 0. Color 628 is page 2/color 116. You'll see why in the [[FF7/Field/Background|background]] section. | ||
Revision as of 13:16, 27 May 2010
Section 4: Palette (Terence Fergusson & myst6re)
The following is an overview of the palette data.
Section 4 Format
| Offset | Size | Description |
|---|---|---|
| 0x00 | 4 bytes | Length (Repeat of previous length header) |
| 0x04 | 2 bytes | Unknown (often blank) |
| 0x06 | 2 bytes | Unknown |
| 0x08 | 2 bytes | Number of colors in palette |
| 0x0A | 2 bytes | Number of palettes |
| 0x0C | (Number of palettes) * (Number of colors in palette) * 2 | Palette data |
After the first length indicator comes another integer, also indicating length. Useless, but it's there. Then there's one more integer; unknown purpose. Then two bytes; unknown (blank often). Then two bytes again; unknown (always 480). Then two bytes; number of colors in the palette (always 256). Then two bytes; number of palettes. Then the actual palette data.
Each palette entry is a 16-bit color. This is unusual - normally palettes store as high quality data as possible, usually 24/32 bit. However since FF7 only ever runs in 16 bit I guess there isn't much point storing any other kind of data. Actually, the data is 15-bit (1 mask bit, 5-bit Blue, 5-bit Green and 5-bit Red).
| Palette Data | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mask | Blue | Green | Red (LSB) | ||||||||||||
| m | b | b | b | b | b | g | g | g | g | g | r | r | r | r | r |
Palettes generally contain a number of colors that's a multiple of 256. This is because the palette is split up into 256-color 'pages' internally. So the first color is page 0/color 0. Color 256 is page 1/color 0. Color 628 is page 2/color 116. You'll see why in the background section.