rust/lib-hwengine-future/src/lib.rs
author unC0Rr
Mon, 13 Feb 2023 11:00:12 +0100
branchtransitional_engine
changeset 15921 5f00829c55ec
parent 15912 6e22f4390b7e
child 15922 da6b67f13c12
permissions -rw-r--r--
Refactor landgen package structure
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use integral_geometry::{Point, Size};
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use land2d;
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use landgen::{outline_template_based::template_based::TemplatedLandGenerator, LandGenerationParameters, LandGenerator};
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use lfprng::LaggedFibonacciPRNG;
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use mapgen::{theme::Theme, MapGenerator};
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use std::fs;
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use std::{ffi::CStr, path::Path};
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#[repr(C)]
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pub struct GameField {
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    collision: land2d::Land2D<u16>,
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    pixels: land2d::Land2D<u32>,
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    landgen_parameters: Option<LandGenerationParameters<u16>>,
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}
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#[no_mangle]
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pub extern "C" fn get_game_field_parameters(
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    game_field: &GameField,
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    width: *mut i32,
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    height: *mut i32,
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    play_width: *mut i32,
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    play_height: *mut i32,
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) {
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    unsafe {
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        *width = game_field.collision.width() as i32;
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        *height = game_field.collision.height() as i32;
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        *play_width = game_field.collision.play_width() as i32;
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        *play_height = game_field.collision.play_height() as i32;
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    }
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}
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#[no_mangle]
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pub extern "C" fn create_empty_game_field(width: u32, height: u32) -> *mut GameField {
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    let game_field = Box::new(GameField {
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        collision: land2d::Land2D::new(&Size::new(width as usize, height as usize), 0),
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        pixels: land2d::Land2D::new(&Size::new(width as usize, height as usize), 0),
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        landgen_parameters: None,
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    });
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    Box::leak(game_field)
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}
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#[no_mangle]
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pub extern "C" fn generate_templated_game_field(
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    feature_size: u32,
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    seed: *const i8,
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    template_type: *const i8,
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    data_path: *const i8,
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) -> *mut GameField {
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    let data_path: &str = unsafe { CStr::from_ptr(data_path) }.to_str().unwrap();
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    let data_path = Path::new(&data_path);
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    let seed: &str = unsafe { CStr::from_ptr(seed) }.to_str().unwrap();
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    let template_type: &str = unsafe { CStr::from_ptr(template_type) }.to_str().unwrap();
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    let mut random_numbers_gen = LaggedFibonacciPRNG::new(seed.as_bytes());
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    let yaml_templates =
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        fs::read_to_string(data_path.join(Path::new("map_templates.yaml")).as_path())
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            .expect("Error reading map templates file");
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    let mut map_gen = MapGenerator::new();
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    map_gen.import_yaml_templates(&yaml_templates);
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    let distance_divisor = feature_size.pow(2) / 8 + 10;
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    let params = LandGenerationParameters::new(0u16, 0x8000u16, distance_divisor, false, false);
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    let template = map_gen
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        .get_template(template_type, &mut random_numbers_gen)
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        .expect("Error reading map templates file")
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        .clone();
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    let landgen = TemplatedLandGenerator::new(template);
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    let collision = landgen.generate_land(&params, &mut random_numbers_gen);
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    let size = collision.size().size();
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    let game_field = Box::new(GameField {
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        collision,
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        pixels: land2d::Land2D::new(&size, 0),
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        landgen_parameters: Some(params),
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    });
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    Box::leak(game_field)
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}
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#[no_mangle]
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pub extern "C" fn apply_theme(
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    game_field: &mut GameField,
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    data_path: *const i8,
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    theme_name: *const i8,
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) {
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    let data_path: &str = unsafe { CStr::from_ptr(data_path) }.to_str().unwrap();
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    let data_path = Path::new(&data_path);
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    let theme_name: &str = unsafe { CStr::from_ptr(theme_name) }.to_str().unwrap();
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    let map_gen = MapGenerator::new();
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    let theme = Theme::load(
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        data_path
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            .join(Path::new("Themes"))
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            .join(Path::new(theme_name))
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            .as_path(),
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    )
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    .unwrap();
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    let params = game_field
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        .landgen_parameters
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        .expect("Land generator parameters specified");
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    let pixels = map_gen.make_texture(&game_field.collision, &params, &theme);
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    game_field.pixels = pixels.into();
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}
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#[no_mangle]
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pub extern "C" fn land_get(game_field: &GameField, x: i32, y: i32) -> u16 {
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    game_field.collision.get(y, x)
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}
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#[no_mangle]
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pub extern "C" fn land_set(game_field: &mut GameField, x: i32, y: i32, value: u16) {
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    game_field.collision.map(y, x, |p| *p = value);
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}
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#[no_mangle]
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pub extern "C" fn land_row(game_field: &mut GameField, row: i32) -> *mut u16 {
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    game_field.collision[row as usize].as_mut_ptr()
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}
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#[no_mangle]
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pub extern "C" fn land_fill(
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    game_field: &mut GameField,
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    x: i32,
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    y: i32,
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    border_value: u16,
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    fill_value: u16,
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) {
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    game_field
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        .collision
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        .fill(Point::new(x, y), border_value, fill_value)
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}
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#[no_mangle]
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pub extern "C" fn land_pixel_get(game_field: &GameField, x: i32, y: i32) -> u32 {
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    game_field.pixels.get(y, x)
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}
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#[no_mangle]
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pub extern "C" fn land_pixel_set(game_field: &mut GameField, x: i32, y: i32, value: u32) {
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    game_field.pixels.map(y, x, |p| *p = value);
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}
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#[no_mangle]
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pub extern "C" fn land_pixel_row(game_field: &mut GameField, row: i32) -> *mut u32 {
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    game_field.pixels[row as usize].as_mut_ptr()
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}
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#[no_mangle]
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pub extern "C" fn dispose_game_field(game_field: *mut GameField) {
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    unsafe { drop(Box::from_raw(game_field)) };
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}