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/*
Copyright 2021-2023 Gabriel Jensen.
This file is part of Luma.
Luma is free software: you can redistribute it
and/or modify it under the terms of the GNU
Affero General Public License as published by
the Free Software Foundation, either version 3
of the License, or (at your option) any later
version.
Luma 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
Affero General Public License for more details.
You should have received a copy of the GNU
Affero General Public License along with Luma.
If not, see <https://www.gnu.org/licenses/>.
*/
use crate::SCREEN_SIZE;
use crate::app::App;
use sdl2::pixels::Color;
use sdl2::rect::Rect;
impl App {
pub fn draw_video(&mut self, video: &[u8], agb_palette: &[u16]) {
// TO-DO: Honour video mode.
let mut palette: [Color; 0x100] = [Color::RGB(0x00, 0x00, 0x00); 0x100];
for (index, element) in palette.iter_mut().enumerate() {
let value = unsafe { *agb_palette.get_unchecked(index) };
let colour = decode_colour(value);
*element = colour;
}
for pixel_y in 0x0..SCREEN_SIZE.1 {
for pixel_x in 0x0..SCREEN_SIZE.0 {
let pixel = pixel_y as usize * SCREEN_SIZE.0 as usize + pixel_x as usize;
let value = video[pixel];
let colour = palette[value as usize];
self.canvas.set_draw_color(colour);
let square = Rect::new(
(pixel_x as u32 * self.scale) as i32,
(pixel_y as u32 * self.scale) as i32,
self.scale,
self.scale,
);
self.canvas.fill_rect(square).unwrap();
}
}
self.canvas.present();
}
}
fn decode_colour(colour: u16) -> Color {
let red = ((colour & 0b0000000000011111) as f32 / 31.0 * 255.0) as u8;
let green = ((colour & 0b0000001111100000) as f32 / 992.0 * 255.0) as u8;
let blue = ((colour & 0b0111110000000000) as f32 / 31744.0 * 255.0) as u8;
return Color::RGB(red, green, blue);
}
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