chore: migrate downsamplerNode with glsl 330 shader (#49)

PR: MovingBlocks/Terasology#4687

Co-authored-by: jdrueckert <jd.rueckert@googlemail.com>

src/main/java/org/terasology/corerendering/rendering/dag/nodes/DownSamplerNode.java

@@ -18,6 +18,7 @@
 import org.terasology.engine.context.Context;
 import org.terasology.engine.monitoring.PerformanceMonitor;
 import org.terasology.engine.rendering.assets.material.Material;
+import org.terasology.engine.rendering.assets.mesh.Mesh;
 import org.terasology.engine.rendering.dag.ConditionDependentNode;
 import org.terasology.engine.rendering.dag.stateChanges.BindFbo;
 import org.terasology.engine.rendering.dag.stateChanges.EnableMaterial;
@@ -26,6 +27,7 @@
 import org.terasology.engine.rendering.opengl.BaseFboManager;
 import org.terasology.engine.rendering.opengl.FBO;
 import org.terasology.engine.rendering.opengl.FboConfig;
+import org.terasology.engine.utilities.Assets;
 import org.terasology.gestalt.assets.ResourceUrn;
 import org.terasology.gestalt.naming.Name;
 
@@ -43,6 +45,8 @@ public class DownSamplerNode extends ConditionDependentNode {
     private FBO outputFbo;
     private Material downSampler;
     private BaseFboManager inputFboManager;
+    private Mesh renderQuad;
+
     /**
      * Constructs the DownSamplerNode instance.
      *
@@ -60,6 +64,10 @@ public DownSamplerNode(String nodeUri, Context context, Name providingModule,
         this.inputFboManager = inputFboManager;
         addOutputFboConnection(1);
         outputFbo = requiresFbo(outputFboConfig, outputFboManager);
+
+
+        this.renderQuad = Assets.get(new ResourceUrn("engine:ScreenQuad"), Mesh.class)
+                .orElseThrow(() -> new RuntimeException("Failed to resolve render Quad"));
     }
 
     /**
@@ -71,7 +79,7 @@ public void process() {
 
         downSampler.setFloat("size", outputFbo.width(), true);
 
-        renderFullscreenQuad();
+        renderQuad.render();
 
         PerformanceMonitor.endActivity();
     }