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factor out ega loader

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This commit is contained in:
Jared Roberts
2016-09-19 03:00:54 -07:00
parent fd9d1cca13
commit 067e8906be
3 changed files with 75 additions and 35 deletions
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46
src/bin/tileview.rs
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@@ -1,30 +1,14 @@
extern crate vrtue;
use vrtue::ega;
use vrtue::ega::{Compression, Tiling};
extern crate image;
extern crate itertools;
use std::env;
use std::io::Read;
use std::path::Path;
static EGA_PALETTE: [[u8; 4]; 16] = [[0x00, 0x00, 0x00, 0x00],
[0x00, 0x00, 0xAA, 0x00],
[0x00, 0xAA, 0x00, 0x00],
[0x00, 0xAA, 0xAA, 0x00],
[0xAA, 0x00, 0x00, 0x00],
[0xAA, 0x00, 0xAA, 0x00],
[0xAA, 0x55, 0x00, 0x00],
[0xAA, 0xAA, 0xAA, 0x00],
[0x55, 0x55, 0x55, 0x00],
[0x55, 0x55, 0xFF, 0x00],
[0x55, 0xFF, 0x55, 0x00],
[0x55, 0xFF, 0xFF, 0x00],
[0xFF, 0x55, 0x55, 0x00],
[0xFF, 0x55, 0xFF, 0x00],
[0xFF, 0xFF, 0x55, 0x00],
[0xFF, 0xFF, 0xFF, 0x00]];
pub fn main() {
fn main() {
let args: Vec<String> = env::args().collect();
let filename;
if args.len() > 1 {
@@ -33,24 +17,16 @@ pub fn main() {
filename = "data/SHAPES.EGA";
}
let mut file = std::fs::File::open(Path::new(filename)).unwrap();
let mut tile_buf = [0u8; 128];
let mut file = std::fs::File::open(Path::new(filename))
.expect(&format!("failed opening EGA file: {}", filename));
let mut ega_vec = Vec::<u8>::new();
let mut i = 0;
while file.read_exact(&mut tile_buf).is_ok() {
let tilepixels = tile_buf.iter()
.flat_map(|tile_byte| {
EGA_PALETTE[(tile_byte >> 4u8 & 0xF) as usize]
.into_iter()
.chain(EGA_PALETTE[(tile_byte & 0xF) as usize]
.into_iter())
})
.map(|x| *x)
.collect::<Vec<u8>>();
file.read_to_end(&mut ega_vec).expect("Read EGA file");
let ega_page = ega::decode(&ega_vec, Compression::UNCOMPRESSED, Tiling::TILED(16));
for (i, tilepixels) in ega_page.iter().enumerate() {
let out_name = format!("out/{}.png", i);
let out_file = std::fs::File::create(Path::new(&out_name)).expect("open out file");
let enc = image::png::PNGEncoder::new(out_file);
enc.encode(&tilepixels, 16, 16, image::ColorType::RGBA(8)).expect("write png");
i += 1;
}
}