OBD:TXMP: Difference between revisions

OBD:TXMP (view source)

Revision as of 01:13, 5 April 2026

27 bytes added , 5 April

m

wording

Iritscen

Bureaucrats, Interface administrators, Suppressors, Administrators

20,500

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 *Valid palette indices start at 1. Palettes are stored per-level in level#_palette.pal files in a pal/ subdirectory of GameDataFolder, corresponding to how .raw and .sep files are stored in raw/ and sep/ subdirectories. Each palette consists of 256 32-bit colors and takes up 1024 bytes.
 *Each level#_palette.pal file contains between 85 and 179 palettes, not counting the first palette (index 0) at the start of each .pal file which is always blank.
-*Two new pixel formats were added, and are the only formats used on PS2: type 16 for opaque textures, meaning 32-bit RGB with ignored alpha, and type 17 for transparent textures.
+*Two new pixel formats were added, and are the only formats used on PS2: type 16 for opaque textures, meaning 32-bit RGB with ignored alpha byte (always set to 0x80), and type 17 for transparent textures.
-*The pixel data (color indices) can be stored either in the .raw file (pointer field at 0xA0) or in the .sep file (pointer at 0xA4). See below for an overview.
+*The pixel data (color indices) can be stored either in the .raw file (pointer field at 0xA0) or in the .sep file (pointer at 0xA4).
+*Each pixel is stored as a 1-byte index into the image's chosen color palette.
 Here is how the end of TXMPrl_1 looks in level3_Final.dat of the English retail PS2 version.
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 |- ALIGN=CENTER VALIGN=TOP
 {{OBDtr| 0x90 | int32    |C8FFC8| 56 00 00 00 | 86        | index of the 256-color palette used by this texture (starts at 0x15800 in level3_palette.pal) }}
-{{OBDtr| 0x94 | int32    |C8FFFF| 10 00 00 00 | 16        | palette pixel format #16 (32-bit RGB, with inactive alpha); the other recurrent format is #17 (32-bit RGBA) }}
+{{OBDtr| 0x94 | int32    |C8FFFF| 10 00 00 00 | 16        | pixel format 16 (indexed 32-bit RGB with inactive alpha) }}
 {{OBDtr| 0x98 | link     |FFC8FF| 00 00 00 00 | 0         | link to a [[OBD:TXAN|TXAN]] file; used if this texture is animated }}
 {{OBDtr| 0x9C | link     |FFC800| 00 00 00 00 | 0         | link to a TXMP file that contains the environment map  }}
 {{OBDtr| 0xA0 | offset   |C800C8| C0 05 00 00 |00 00 05 C0| offset of pixel data in the .raw file }}
 {{OBDtr| 0xA4 | offset   |C87C64| 00 00 00 00 | 0         | offset of pixel data in the .sep file }}
-{{OBDtr| 0xA8 | int32    |B0C3D4| 00 00 00 00 | 0         | always 0; supposedly the same "material type" (set at runtime) as for Windows demo and Mac }}
+{{OBDtr| 0xA8 | int32    |B0C3D4| 00 00 00 00 | 0         | always 0; presumably the same "material type" (set at runtime) as for Windows demo and Mac }}
-{{OBDtr| 0xAC | char[4]  |B0C3D4| AD DE AD DE | dead      | supposedly the same texture name pointer (set at runtime) as for Windows demo and Mac }}
+{{OBDtr| 0xAC | char[4]  |B0C3D4| AD DE AD DE | dead      | presumably the same texture name pointer (set at runtime) as for Windows demo and Mac }}
-{{OBDtr| 0xB0 | char[4]  |B0C3D4| AD DE AD DE | dead      | supposedly the same rendering optimization flags (runtime) as for Windows demo and Mac }}
+{{OBDtr| 0xB0 | char[4]  |B0C3D4| AD DE AD DE | dead      | presumably the same rendering optimization flags (runtime) as for Windows demo and Mac }}
 {{OBDtr| 0xB4 | char[12] |B0C3D4| AD DE       | dead      | completely unused bytes (not part of the template) }}
 |}