diff options
Diffstat (limited to 'src/art.rs')
| -rw-r--r-- | src/art.rs | 120 |
1 files changed, 0 insertions, 120 deletions
diff --git a/src/art.rs b/src/art.rs deleted file mode 100644 index 2e7e116..0000000 --- a/src/art.rs +++ /dev/null @@ -1,120 +0,0 @@ -// Copyright (C) 2018 Jakob L. Kreuze, All Rights Reserved. -// -// This file is part of rebuild. -// -// rebuild is free software: you can redistribute it and/or modify it under the -// terms of the GNU General Public License as published by the Free Software -// Foundation, either version 3 of the License, or (at your option) any later -// version. -// -// rebuild is distributed in the hope that it will be useful, but WITHOUT ANY -// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR -// A PARTICULAR PURPOSE. See the GNU General Public License for more details. -// -// You should have received a copy of the GNU General Public License along with -// rebuild. If not, see <http://www.gnu.org/licenses/>. - -extern crate simple_error; - -use std::error::Error; - -// What's the PALETTE.DAT format? -// -// char palette[768], palookup[numpalookups][256], transluc[256][256]; -// short numpalookups; -// -// fil = open("PALETTE.DAT",...); -// read(fil,palette,768); -// read(fil,&numpalookups,2); -// read(fil,palookup,numpalookups*256); -// read(fil,transluc,65536); -// close(fil); -// -// PALETTE: This 768 byte array is exactly the palette you want. The format is: -// Red0, Green0, Blue0, Red1, Green1, Blue1, ..., Blue255 -// The colors are based on the VGA 262,144 color palette. The values range from -// 0-63, so if you want to convert it to a windows palette you will have to -// multiply each byte by 4. -// -// NUMPALOOKUPS: The number of shading tables used. Usually this number is 32, -// but 16 or 64 have also been used. Each of the 256 colors of the VGA palette -// can take on any of "numpalookups" number of shades. -// -// PALOOKUP: The shading table. If numpalookups = 32, then this table is: -// (32 shades) * (256 colors) = 8192 bytes (8K). The shade tables are often made -// to go from normal brightness (shade #0) down to pitch black (shade #31) So -// the first 256 bytes of the table would be for shade #0, etc... -// -// TRANSLUC: 64K translucent lookup table. Given any 2 colors of the palette, -// this lookup table gives the best match of the 2 colors when mixed together. -// -// Here's a funny story: I noticed that Duke3D's PALETTE.DAT file is 8K longer -// than it should be. Any PALETTE.DAT file with 32 shades and translucent table -// should be 74,498 bytes. Duke3D's palette is 82,690 bytes, but it only has 32 -// shades! The reason is that at one time, Duke3D had 64 shades in their -// "palookup" table. Then when we noticed that this extra memory overhead slowed -// down the frame rate of the game noticably, it was converted back to 32 -// shades. The problem is that my palette conversion program never truncated off -// the end of the file. So the last 8K of Duke3D's PALETTE.DAT is the last 8K of -// a translucent table that was based on an older version of their palette. -// -// -// For canonical parsers, see: -// - 'paletteLoadFromDisk' in EDuke's 'build/src/palette.cpp' -// - 'loadpalette' in Build's 'ENGINE.C' - -/// Parser for PALETTE.DAT, the file specifying the color format. -pub struct Palette { - colors: Vec<u8>, -} - -impl Palette { - /// Parse the contents of a PALETTE.DAT - pub fn new(data: &[u8]) -> Result<Palette, Box<Error>> { - let len = data.len(); - - // FIXME: This only takes into account the actual palette. PALETTE.DAT - // should also contain some lookup tables. - if len < 770 { - bail!("Too small to contain palette."); - } - - let colors = data[0..768].to_vec(); - - // FIXME: Not loading the lookup table yet because.. well, I don't know - // if we really need it yet? I suppose we'll need to get the values for - // TRANSLUC, but we're not on DOS anymore and I think a lookup table - // would be overkill. My plan is to convert ART files into bitmaps ahead - // of time, anyway. - - // let _lookup_count = LittleEndian::read_u16(size) as usize; - - Ok(Palette { colors }) - } -} - -#[cfg(test)] -mod palette_tests { - use super::*; - - #[test] - fn test_load_slice() { - // Considering the size of PALETTE.DAT, it would be absurd embed as a - // blob in this file. We'll just generate dummy data. I'm leaving the - // number of 'pa' lookups as 0 intentionally. - let data = [0; 0x10301]; - - if let Err(e) = Palette::new(&data) { - panic!("Valid PALETTE errored out with '{}'", e); - } - } - - #[test] - fn test_not_enough_data() { - let data = [0; 1]; - - if let Ok(_) = Palette::new(&data) { - panic!("Accepted incomplete header."); - } - } -} |