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feat: implement optimized text rendering by caching font characters into special atlas

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This commit is contained in:
Ryan Walters
2025-09-03 17:31:48 -05:00
parent 028ee28840
commit 23f43288e1
4 changed files with 319 additions and 36 deletions
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16
src/game.rs
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@@ -18,10 +18,10 @@ use crate::systems::{self, ghost_collision_system, present_system, Hidden, Linea
use crate::systems::{
audio_system, blinking_system, collision_system, debug_render_system, directional_render_system, dirty_render_system,
eaten_ghost_system, ghost_movement_system, ghost_state_system, hud_render_system, item_system, linear_render_system, profile,
render_system, AudioEvent, AudioResource, AudioState, BackbufferResource, Collider, DebugFontResource, DebugState,
DebugTextureResource, DeltaTime, DirectionalAnimation, EntityType, Frozen, Ghost, GhostAnimations, GhostBundle,
GhostCollider, GlobalState, ItemBundle, ItemCollider, MapTextureResource, PacmanCollider, PlayerBundle, PlayerControlled,
Renderable, ScoreResource, StartupSequence, SystemTimings,
render_system, AudioEvent, AudioResource, AudioState, BackbufferResource, Collider, DebugState, DebugTextureResource,
DeltaTime, DirectionalAnimation, EntityType, Frozen, Ghost, GhostAnimations, GhostBundle, GhostCollider, GlobalState,
ItemBundle, ItemCollider, MapTextureResource, PacmanCollider, PlayerBundle, PlayerControlled, Renderable, ScoreResource,
StartupSequence, SystemTimings,
};
use crate::texture::animated::{DirectionalTiles, TileSequence};
use crate::texture::sprite::AtlasTile;
@@ -42,6 +42,7 @@ use crate::{
asset::{get_asset_bytes, Asset},
events::GameCommand,
map::render::MapRenderer,
systems::debug::TtfAtlasResource,
systems::input::{Bindings, CursorPosition},
texture::sprite::{AtlasMapper, SpriteAtlas},
};
@@ -162,12 +163,17 @@ impl Game {
debug_texture.set_blend_mode(BlendMode::Blend);
debug_texture.set_scale_mode(ScaleMode::Nearest);
// Create debug text atlas for efficient debug rendering
let font_data: &'static [u8] = get_asset_bytes(Asset::Font)?.to_vec().leak();
let font_asset = RWops::from_bytes(font_data).map_err(|_| GameError::Sdl("Failed to load font".to_string()))?;
let debug_font = ttf_context
.load_font_from_rwops(font_asset, constants::ui::DEBUG_FONT_SIZE)
.map_err(|e| GameError::Sdl(e.to_string()))?;
let mut ttf_atlas = crate::texture::ttf::TtfAtlas::new(&texture_creator, &debug_font)?;
// Populate the atlas with actual character data
ttf_atlas.populate_atlas(&mut canvas, &texture_creator, &debug_font)?;
// Initialize audio system
let audio = crate::audio::Audio::new();
@@ -315,7 +321,7 @@ impl Game {
world.insert_non_send_resource(BackbufferResource(backbuffer));
world.insert_non_send_resource(MapTextureResource(map_texture));
world.insert_non_send_resource(DebugTextureResource(debug_texture));
world.insert_non_send_resource(DebugFontResource(debug_font));
world.insert_non_send_resource(TtfAtlasResource(ttf_atlas));
world.insert_non_send_resource(AudioResource(audio));
world.add_observer(