xevion/rust-sdl2-emscripten
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SDL2 Mixer with Volume Adjustment

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Xevion
2024-04-18 03:56:14 -05:00
parent f54922e1e1
commit e4334ece7a
5 changed files with 71 additions and 19 deletions
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84
src/main.rs
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@@ -1,16 +1,18 @@
use std::process;
use std::time::Duration;
use sdl2::rwops::RWops;
use sdl2::ttf;
use sdl2::event::Event;
use sdl2::image::LoadTexture;
use sdl2::keyboard::Keycode;
use sdl2::mixer::{self, LoaderRWops, Music};
use sdl2::pixels::Color;
use sdl2::rect::{Point, Rect};
use sdl2::rwops::RWops;
use sdl2::sys::AUDIO_S16LSB;
use sdl2::ttf;
static FONT_DATA: &[u8] = include_bytes!("../assets/TerminalVector.ttf");
static MUSIC_DATA: &[u8] = include_bytes!("../assets/tetris.ogg");
static BLACK: Color = Color::RGB(0, 0, 0);
#[cfg(target_os = "emscripten")]
@@ -22,7 +24,7 @@ fn sleep(ms: u32) {
}
#[cfg(target_os = "emscripten")]
fn now() -> f64 {
fn now() -> f64 {
emscripten::emscripten::now() / 1000f64
}
@@ -75,12 +77,29 @@ fn main() {
let ttf_ctx = ttf_context();
mixer::open_audio(
44_100,
sdl2::mixer::AUDIO_S16LSB,
sdl2::mixer::DEFAULT_CHANNELS,
1024,
)
.unwrap();
let mut volume = 3;
mixer::Music::set_volume(volume);
let music_data = RWops::from_bytes(MUSIC_DATA).unwrap();
let music = music_data.load_music().unwrap();
music.play(-1).unwrap();
let mut prev = now();
// let font_data = RWops::from_bytes(FONT_DATA).unwrap();
// let font_size = 12;
// let font = ttf_ctx.load_font_from_rwops(font_data, font_size).unwrap();
let font = ttf_ctx.load_font("./assets/TerminalVector.ttf", 12).unwrap();
let font_data = RWops::from_bytes(FONT_DATA).unwrap();
let font_size = 12;
let font = ttf_ctx.load_font_from_rwops(font_data, font_size).unwrap();
let font = ttf_ctx
.load_font("./assets/TerminalVector.ttf", 12)
.unwrap();
let fruit_atlas = texture_creator
.load_texture("./assets/fruit.png")
@@ -123,12 +142,35 @@ fn main() {
moved = true;
}
Keycode::Up => {
point.y -= 32;
moved = true;
if ctx
.keyboard()
.mod_state()
.contains(sdl2::keyboard::Mod::LSHIFTMOD)
{
if volume < 128 {
volume += 1;
mixer::Music::set_volume(volume);
}
} else {
point.y -= 32;
moved = true;
}
}
Keycode::Down => {
point.y += 32;
moved = true;
// Shift means modify volume
if ctx
.keyboard()
.mod_state()
.contains(sdl2::keyboard::Mod::LSHIFTMOD)
{
if volume > 0 {
volume -= 1;
mixer::Music::set_volume(volume);
}
} else {
point.y += 32;
moved = true;
}
}
_ => {}
},
@@ -172,9 +214,19 @@ fn main() {
.render(&text)
.blended(Color::RGBA(255, 255, 255, 50))
.unwrap();
let texture = texture_creator.create_texture_from_surface(&surface).unwrap();
let _ = canvas.copy(&texture, None, Rect::new(640i32 - (25i32 * text.len() as i32), 0, 25 * text.len() as u32, 40));
let texture = texture_creator
.create_texture_from_surface(&surface)
.unwrap();
let _ = canvas.copy(
&texture,
None,
Rect::new(
640i32 - (25i32 * text.len() as i32),
0,
25 * text.len() as u32,
40,
),
);
canvas.present();
@@ -191,7 +243,7 @@ fn main() {
let duration = Duration::from_secs_f64(now() - prev);
let fps = 1f64 / (duration.as_secs_f64());
prev = now();
n += 1;
let a = 1f64 / n as f64;
let b = 1f64 - a;