rust/theme-editor/src/main.rs
author alfadur
Tue, 30 Oct 2018 19:08:39 +0300
changeset 14038 bf77c4d2294f
parent 14036 c47283feafac
child 14059 3185fb34f3b5
permissions -rw-r--r--
fix theme editor
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use sdl2::{
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    keyboard::Scancode,
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    event::EventType,
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    surface::Surface,
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    pixels::{
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        PixelFormatEnum, Color
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    }
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};
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use integral_geometry::{Point, Size};
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use rand::{
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    thread_rng, RngCore, Rng,
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    distributions::uniform::SampleUniform
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};
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use landgen::{
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    LandGenerator,
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    LandGenerationParameters
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};
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use land2d::Land2D;
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use lfprng::LaggedFibonacciPRNG;
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struct LandSource<T> {
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    rnd: LaggedFibonacciPRNG,
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    generator: T
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}
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impl <T: LandGenerator> LandSource<T> {
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    fn new(generator: T) -> Self {
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        let mut init = [0u8; 64];
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        thread_rng().fill_bytes(&mut init);
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        LandSource {
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            rnd: LaggedFibonacciPRNG::new(&init),
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            generator
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        }
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    }
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    fn next(&mut self, parameters: LandGenerationParameters<u32>) -> Land2D<u32> {
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        self.generator.generate_land(parameters, &mut self.rnd)
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    }
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}
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fn fill_pixels(pixels: &mut [u8], land: &Land2D<u32>) {
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    for (surf_row, land_row) in pixels.chunks_mut(land.width() * 4).zip(land.rows()) {
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        for (surf_pixel, land_pixel) in surf_row.chunks_mut(4).zip(land_row) {
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            if let [b, g, r, a] = surf_pixel {
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                *a = 255; *r = *land_pixel as u8;
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            }
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        }
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    }
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}
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fn fill_texture(surface: &mut Surface, land: &Land2D<u32>) {
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    if surface.must_lock() {
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        surface.with_lock_mut(|data| fill_pixels(data, land));
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    } else {
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        surface.without_lock_mut().map(|data| fill_pixels(data, land));
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    }
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}
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fn rnd<T: Default + SampleUniform + Ord>(max: T) -> T {
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    thread_rng().gen_range(T::default(), max)
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}
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const WIDTH: u32 = 512;
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const HEIGHT: u32 = 512;
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const SIZE: Size = Size {width: 512, height: 512};
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fn main() {
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    let sdl = sdl2::init().unwrap();
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    let _image = sdl2::image::init(sdl2::image::INIT_PNG).unwrap();
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    let events = sdl.event().unwrap();
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    let mut pump = sdl.event_pump().unwrap();
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    let video = sdl.video().unwrap();
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    let window = video.window("Theme Editor", WIDTH, HEIGHT)
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        .position_centered()
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        .build().unwrap();
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    let mut land_surf = Surface::new(WIDTH, HEIGHT, PixelFormatEnum::ARGB8888).unwrap();
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    fn point() -> Point {
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        Point::new(rnd(WIDTH as i32), rnd(HEIGHT as i32))
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    }
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    let mut land = Land2D::new(SIZE, 0);
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    for i in 0..32 {
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        land.draw_thick_line(point(), point(), rnd(5), u32::max_value());
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        land.fill_circle(point(), rnd(60), u32::max_value());
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    }
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    fill_texture(&mut land_surf, &land);
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    let mut win_surf = window.surface(&pump).unwrap();
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    let win_rect = win_surf.rect();
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    land_surf.blit(land_surf.rect(), &mut win_surf, win_rect).unwrap();
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    win_surf.update_window();
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    'pool: loop {
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        use sdl2::event::Event::*;
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        pump.pump_events();
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        while let Some(event) = pump.poll_event() {
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            match event {
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                Quit{ .. } => break 'pool,
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                _ => ()
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            }
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        }
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    }
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}