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FF7/Field/Palette

1,195 bytes removed, 07:04, 30 March 2018
Created page with "=== Section 4: Palette (Terence Fergusson & myst6re) === The following is an overview of the palette data. ==== Section 4..."
=== Section 4: Palette ([[User:Terence FergussonTerence_Fergusson|Terence Fergusson]] & amp; [[User:Myst6re|myst6re]]) ===
The following is an overview of the palette data.
==== Section 4 Format ====
{| borderclass="0" cellspacing="1" cellpadding="3" style="background: rgb(0,0,0)" align="centerwikitable"! style="background:rgb(204,204,204)" align="center" | Offset! style="background:rgb(204,204,204)" align="center" | Size! style="background:rgb(204,204,204); width: 250px" align="center" | Description
|-
|style="background:rgb(255,255,255)" | 0x00|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)" | 0x04|style="background:rgb(255,255,255)" | 2 bytes|style="background:rgb(255,255,255)" | PalX
|-
|style="background:rgb(255,255,255)" | 0x06|style="background:rgb(255,255,255)" | 2 bytes|style="background:rgb(255,255,255)" | PalY
|-
|style="background:rgb(255,255,255)" | 0x08|style="background:rgb(255,255,255)" | 2 bytes|style="background:rgb(255,255,255)" | Number of colors in palette
|-
|style="background:rgb(255,255,255)" | 0x0A|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
|}
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 again; palY, useful for the PS version only (always 480).<br />Then two bytes; number of colors in the palette (always 256).<br />Then two bytes; number of palettes.<br />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).
{| borderclass="0" cellspacing="1" cellpadding="3" style="background: rgb(0,0,0)" align="centerwikitable"! style="background:rgb(204,204,204)" aligncolspan="center16" colspanalign="16center" | Palette Data
|-
|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" | Red (LSB)
|-
|style="background:rgb(255,255,255)" align="center" | m|style<font color="background:rgb(255,255,255);color:blue" | > b</font>|style<font color="background:rgb(255,255,255);color:blue" | > b</font>|style<font color="background:rgb(255,255,255);color:blue" | > b</font>|style<font color="background:rgb(255,255,255);color:blue" | > b</font>|style<font color="background:rgb(255,255,255);color:blue" | > b</font>|style<font color="background:rgb(255,255,255);color:green" | > g</font>|style<font color="background:rgb(255,255,255);color:green" | > g</font>|style<font color="background:rgb(255,255,255);color:green" | > g</font>|style<font color="background:rgb(255,255,255);color:green" | > g</font>|style<font color="background:rgb(255,255,255);color:green" | > g</font>|style<font color="background:rgb(255,255,255);color:red" | > r</font>|style<font color="background:rgb(255,255,255);color:red" | > r</font>|style<font color="background:rgb(255,255,255);color:red" | > r</font>|style<font color="background:rgb(255,255,255);color:red" | > r</font>|style<font color="background:rgb(255,255,255);color:red" | > r</font>
|}
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.
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