Implementing Fluid Rendering

src/main/java/me/shedaniel/rei/gui/renderers/FluidRenderer.java

@@ -4,10 +4,20 @@ import com.google.common.collect.Lists;
 import me.shedaniel.rei.RoughlyEnoughItemsCore;
 import me.shedaniel.rei.api.ClientHelper;
 import me.shedaniel.rei.api.Renderer;
-import me.shedaniel.rei.client.ScreenHelper;
-import me.shedaniel.rei.gui.widget.EntryListOverlay;
+import me.shedaniel.rei.gui.widget.EntryListWidget;
 import me.shedaniel.rei.gui.widget.QueuedTooltip;
+import me.shedaniel.rei.impl.ScreenHelper;
+import net.fabricmc.fabric.api.client.render.fluid.v1.FluidRenderHandler;
+import net.fabricmc.fabric.api.client.render.fluid.v1.FluidRenderHandlerRegistry;
+import net.minecraft.client.MinecraftClient;
+import net.minecraft.client.render.BufferBuilder;
+import net.minecraft.client.render.GuiLighting;
+import net.minecraft.client.render.Tessellator;
+import net.minecraft.client.render.VertexFormats;
+import net.minecraft.client.texture.Sprite;
+import net.minecraft.client.texture.SpriteAtlasTexture;
 import net.minecraft.fluid.Fluid;
+import net.minecraft.util.Lazy;
 import net.minecraft.util.registry.Registry;
 
 import java.util.Collections;
@@ -15,11 +25,37 @@ import java.util.List;
 
 public abstract class FluidRenderer extends Renderer {
     public boolean drawTooltip = false;
+    public Lazy<Sprite> sprite = new Lazy<>(() -> {
+        try {
+            FluidRenderHandler fluidRenderHandler = FluidRenderHandlerRegistry.INSTANCE.get(getFluid());
+            if (fluidRenderHandler == null)
+                return null;
+            Sprite[] sprites = fluidRenderHandler.getFluidSprites(null, null, getFluid().getDefaultState());
+            return sprites[0];
+        } catch (Exception e) {
+            e.printStackTrace();
+            return null;
+        }
+    });
     
     @Override
     public void render(int x, int y, double mouseX, double mouseY, float delta) {
-        int l = x - 8, i1 = y - 6;
-        // TODO: Render Fluid
+        x = x - 8;
+        y = y - 6;
+        Sprite f = this.sprite.get();
+        if (f != null) {
+            MinecraftClient.getInstance().getTextureManager().bindTexture(SpriteAtlasTexture.BLOCK_ATLAS_TEX);
+            GuiLighting.disable();
+            Tessellator tess = Tessellator.getInstance();
+            BufferBuilder bb = tess.getBufferBuilder();
+            bb.begin(7, VertexFormats.POSITION_UV_COLOR);
+            bb.vertex(x + 16, y, blitOffset).texture(f.getMaxU(), f.getMinV()).color(255, 255, 255, 255).next();
+            bb.vertex(x, y, blitOffset).texture(f.getMinU(), f.getMinV()).color(255, 255, 255, 255).next();
+            bb.vertex(x, y + 16, blitOffset).texture(f.getMinU(), f.getMaxV()).color(255, 255, 255, 255).next();
+            bb.vertex(x + 16, y + 16, blitOffset).texture(f.getMaxU(), f.getMaxV()).color(255, 255, 255, 255).next();
+            tess.draw();
+        }
+        this.blitOffset = 0;
         if (drawTooltip && mouseX >= x - 8 && mouseX <= x + 8 && mouseY >= y - 6 && mouseY <= y + 10)
             queueTooltip(getFluid(), delta);
         this.drawTooltip = false;
@@ -30,7 +66,7 @@ public abstract class FluidRenderer extends Renderer {
     }
     
     private List<String> getTooltip(Fluid fluid) {
-        List<String> toolTip = Lists.newArrayList(EntryListOverlay.tryGetFluidName(fluid));
+        List<String> toolTip = Lists.newArrayList(EntryListWidget.tryGetFluidName(fluid));
         if (RoughlyEnoughItemsCore.getConfigManager().getConfig().shouldAppendModNames()) {
             final String modString = ClientHelper.getInstance().getFormattedModFromIdentifier(Registry.FLUID.getId(fluid));
             toolTip.addAll(getExtraToolTips(fluid));