@@ -1973,6 +1973,11 @@ public void drawBuffer(int buf) {
       gl2x.glDrawBuffer(buf);
     } else if (gl3 != null) {
       gl3.glDrawBuffer(buf);
+    } else if (gl3es3 != null) {
+      IntBuffer intBuffer = IntBuffer.allocate(1);
+      intBuffer.put(buf);
+      intBuffer.rewind();
+      gl3es3.glDrawBuffers(1, intBuffer);
     } else {
       throw new RuntimeException(String.format(MISSING_GLFUNC_ERROR, "glDrawBuffer()"));
     }