1 files changed, 65 insertions, 0 deletions
diff --git a/src/main/java/me/shedaniel/rei/api/Renderer.java b/src/main/java/me/shedaniel/rei/api/Renderer.java
index d3ddab934..43d4c55b3 100644
--- a/src/main/java/me/shedaniel/rei/api/Renderer.java
+++ b/src/main/java/me/shedaniel/rei/api/Renderer.java
@@ -5,10 +5,74 @@
 
 package me.shedaniel.rei.api;
 
+import me.shedaniel.rei.gui.renderables.EmptyRenderer;
+import me.shedaniel.rei.gui.renderables.ItemStackRenderer;
+import me.shedaniel.rei.gui.renderables.SimpleRecipeRenderer;
 import net.minecraft.client.gui.DrawableHelper;
+import net.minecraft.item.ItemStack;
+import net.minecraft.util.math.MathHelper;
+
+import java.util.List;
+import java.util.function.Supplier;
 
 public abstract class Renderer extends DrawableHelper {
     /**
+     * Gets an item stack renderer by an item stack supplier
+     *
+     * @param supplier the supplier for getting the item stack
+     * @return the item stack renderer
+     */
+    public static ItemStackRenderer fromItemStackSupplier(Supplier<ItemStack> supplier) {
+        return new ItemStackRenderer() {
+            @Override
+            public ItemStack getItemStack() {
+                return supplier.get();
+            }
+        };
+    }
+    
+    /**
+     * Gets an item stack renderer by an item stack
+     *
+     * @param stack the item stack to be displayed
+     * @return the item stack renderer
+     */
+    public static ItemStackRenderer fromItemStack(ItemStack stack) {
+        return fromItemStackSupplier(() -> stack);
+    }
+    
+    /**
+     * Gets an empty renderer
+     *
+     * @return an empty renderer
+     */
+    public static EmptyRenderer empty() {
+        return EmptyRenderer.INSTANCE;
+    }
+    
+    /**
+     * Gets a simple recipe renderer from inputs and outputs
+     *
+     * @param input  the list of input items
+     * @param output the list of output items
+     * @return the recipe renderer
+     */
+    public static SimpleRecipeRenderer fromRecipe(Supplier<List<List<ItemStack>>> input, Supplier<List<ItemStack>> output) {
+        return new SimpleRecipeRenderer(input, output);
+    }
+    
+    public static ItemStackRenderer fromItemStacks(List<ItemStack> stacks) {
+        return new ItemStackRenderer() {
+            @Override
+            public ItemStack getItemStack() {
+                if (stacks.isEmpty())
+                    return ItemStack.EMPTY;
+                return stacks.get(MathHelper.floor((System.currentTimeMillis() / 500 % (double) stacks.size()) / 1f));
+            }
+        };
+    }
+    
+    /**
      * Gets the current blit offset
      *
      * @return the blit offset
@@ -36,4 +100,5 @@ public abstract class Renderer extends DrawableHelper {
      * @param delta  the delta
      */
     public abstract void render(int x, int y, double mouseX, double mouseY, float delta);
+    
 }