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feat: optimize input system, avoid heap allocations, disable as many events as possible

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This commit is contained in:
Ryan Walters
2025-09-02 14:57:01 -05:00
parent 1b0624a174
commit d6d0f47483
2 changed files with 89 additions and 16 deletions
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58
src/game.rs
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@@ -31,6 +31,7 @@ use bevy_ecs::schedule::common_conditions::resource_changed;
use bevy_ecs::schedule::{Condition, IntoScheduleConfigs, Schedule, SystemSet};
use bevy_ecs::system::ResMut;
use bevy_ecs::world::World;
use sdl2::event::EventType;
use sdl2::image::LoadTexture;
use sdl2::render::{BlendMode, Canvas, ScaleMode, TextureCreator};
use sdl2::rwops::RWops;
@@ -83,8 +84,63 @@ impl Game {
pub fn new(
mut canvas: Canvas<Window>,
texture_creator: TextureCreator<WindowContext>,
event_pump: EventPump,
mut event_pump: EventPump,
) -> GameResult<Game> {
// Disable uninteresting events
for event_type in [
EventType::JoyAxisMotion,
EventType::JoyBallMotion,
EventType::JoyHatMotion,
EventType::JoyButtonDown,
EventType::JoyButtonUp,
EventType::JoyDeviceAdded,
EventType::JoyDeviceRemoved,
EventType::ControllerAxisMotion,
EventType::ControllerButtonDown,
EventType::ControllerButtonUp,
EventType::ControllerDeviceAdded,
EventType::ControllerDeviceRemoved,
EventType::ControllerDeviceRemapped,
EventType::ControllerTouchpadDown,
EventType::ControllerTouchpadMotion,
EventType::ControllerTouchpadUp,
EventType::FingerDown,
EventType::FingerUp,
EventType::FingerMotion,
EventType::DollarGesture,
EventType::DollarRecord,
EventType::MultiGesture,
EventType::ClipboardUpdate,
EventType::DropFile,
EventType::DropText,
EventType::DropBegin,
EventType::DropComplete,
EventType::AudioDeviceAdded,
EventType::AudioDeviceRemoved,
EventType::RenderTargetsReset,
EventType::RenderDeviceReset,
EventType::LocaleChanged,
EventType::TextInput,
EventType::TextEditing,
EventType::Display,
EventType::Window,
EventType::MouseWheel,
EventType::MouseMotion,
EventType::MouseButtonDown,
EventType::MouseButtonUp,
EventType::MouseButtonDown,
EventType::AppDidEnterBackground,
EventType::AppWillEnterForeground,
EventType::AppWillEnterBackground,
EventType::AppDidEnterForeground,
EventType::AppLowMemory,
EventType::AppTerminating,
EventType::User,
EventType::Last,
] {
event_pump.disable_event(event_type);
}
let ttf_context = Box::leak(Box::new(sdl2::ttf::init().map_err(|e| GameError::Sdl(e.to_string()))?));
let mut backbuffer = texture_creator
.create_texture_target(None, CANVAS_SIZE.x, CANVAS_SIZE.y)