Difference between revisions of "FF7/Field/Palette"
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|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, | + | |style="background:rgb(255,255,255)" | 0x04 |
| − | |style="background:rgb(255,255, | + | |style="background:rgb(255,255,255)" | 2 bytes |
| − | |style="background:rgb(255,255, | + | |style="background:rgb(255,255,255)" | PalX |
|- | |- | ||
| − | |style="background:rgb(255,255, | + | |style="background:rgb(255,255,255)" | 0x06 |
| − | |style="background:rgb(255,255, | + | |style="background:rgb(255,255,255)" | 2 bytes |
| − | |style="background:rgb(255,255, | + | |style="background:rgb(255,255,255)" | PalY |
|- | |- | ||
|style="background:rgb(255,255,255)" | 0x08 | |style="background:rgb(255,255,255)" | 0x08 | ||
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|} | |} | ||
| − | 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.<br /> |
| − | + | Then two bytes; palX, useful for the PS version only (always 0).<br /> | |
| − | Then two bytes; | + | Then two bytes again; palY, useful for the PS version only (always 480).<br /> |
| − | Then two bytes again; | + | Then two bytes; number of colors in the palette (always 256).<br /> |
| − | Then two bytes; number of colors in the palette (always 256). | + | Then two bytes; number of palettes.<br /> |
| − | Then two bytes; number of palettes. | ||
Then the actual palette data. | Then the actual palette data. | ||
Revision as of 00:05, 2 June 2013
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 | PalX |
| 0x06 | 2 bytes | PalY |
| 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 two bytes; palX, useful for the PS version only (always 0).
Then two bytes again; palY, useful for the PS version only (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.
