src/game/java/net/minecraft/client/resources/model/AtlasSet.java

package net.minecraft.client.resources.model;

import java.util.Map;
import java.util.Map.Entry;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.Executor;
import java.util.stream.Collectors;
import javax.annotation.Nullable;
import net.minecraft.client.renderer.texture.SpriteLoader;
import net.minecraft.client.renderer.texture.TextureAtlas;
import net.minecraft.client.renderer.texture.TextureAtlasSprite;
import net.minecraft.client.renderer.texture.TextureManager;
import net.minecraft.resources.ResourceLocation;
import net.minecraft.server.packs.resources.ResourceManager;
import net.minecraftforge.api.distmarker.Dist;
import net.minecraftforge.api.distmarker.OnlyIn;

@OnlyIn(Dist.CLIENT)
public class AtlasSet implements AutoCloseable {
    private final Map<ResourceLocation, AtlasSet.AtlasEntry> atlases;

    public AtlasSet(Map<ResourceLocation, ResourceLocation> p_249969_, TextureManager p_252059_) {
        this.atlases = p_249969_.entrySet().stream().collect(Collectors.toMap(Entry::getKey, p_261403_ -> {
            TextureAtlas textureatlas = new TextureAtlas(p_261403_.getKey());
            p_252059_.register(p_261403_.getKey(), textureatlas);
            return new AtlasSet.AtlasEntry(textureatlas, p_261403_.getValue());
        }));
    }

    public TextureAtlas getAtlas(ResourceLocation p_250828_) {
        return this.atlases.get(p_250828_).atlas();
    }

    @Override
    public void close() {
        this.atlases.values().forEach(AtlasSet.AtlasEntry::close);
        this.atlases.clear();
    }

    public Map<ResourceLocation, CompletableFuture<AtlasSet.StitchResult>> scheduleLoad(ResourceManager p_249256_, int p_251059_, Executor p_250751_) {
        return this.atlases
            .entrySet()
            .stream()
            .collect(
                Collectors.toMap(
                    Entry::getKey,
                    p_261401_ -> {
                        AtlasSet.AtlasEntry atlasset$atlasentry = p_261401_.getValue();
                        return SpriteLoader.create(atlasset$atlasentry.atlas)
                            .loadAndStitch(p_249256_, atlasset$atlasentry.atlasInfoLocation, p_251059_, p_250751_)
                            .thenApply(p_250418_ -> new AtlasSet.StitchResult(atlasset$atlasentry.atlas, p_250418_));
                    }
                )
            );
    }

    @OnlyIn(Dist.CLIENT)
    static record AtlasEntry(TextureAtlas atlas, ResourceLocation atlasInfoLocation) implements AutoCloseable {
        @Override
        public void close() {
            this.atlas.clearTextureData();
        }
    }

    @OnlyIn(Dist.CLIENT)
    public static class StitchResult {
        private final TextureAtlas atlas;
        private final SpriteLoader.Preparations preparations;

        public StitchResult(TextureAtlas p_250381_, SpriteLoader.Preparations p_251137_) {
            this.atlas = p_250381_;
            this.preparations = p_251137_;
        }

        @Nullable
        public TextureAtlasSprite getSprite(ResourceLocation p_249039_) {
            return this.preparations.regions().get(p_249039_);
        }

        public TextureAtlasSprite missing() {
            return this.preparations.missing();
        }

        public CompletableFuture<Void> readyForUpload() {
            return this.preparations.readyForUpload();
        }

        public void upload() {
            this.atlas.upload(this.preparations);
        }
    }
}