Much requested temporary hack for items and TESRs. Context: #1582, #1597, #1713, #2058 and others.

patches/minecraft/net/minecraft/client/renderer/tileentity/TileEntityItemStackRenderer.java.patch

@@ -0,0 +1,10 @@
+--- ../src-base/minecraft/net/minecraft/client/renderer/tileentity/TileEntityItemStackRenderer.java
++++ ../src-work/minecraft/net/minecraft/client/renderer/tileentity/TileEntityItemStackRenderer.java
+@@ -79,6 +79,7 @@
+             {
+                 TileEntityRendererDispatcher.field_147556_a.func_147549_a(this.field_147718_c, 0.0D, 0.0D, 0.0D, 0.0F);
+             }
++            else if (block != Blocks.field_150486_ae) net.minecraftforge.client.ForgeHooksClient.renderTileItem(p_179022_1_.func_77973_b(), p_179022_1_.func_77960_j());
+             else
+             {
+                 TileEntityRendererDispatcher.field_147556_a.func_147549_a(this.field_147717_b, 0.0D, 0.0D, 0.0D, 0.0F);

src/main/java/net/minecraftforge/client/ForgeHooksClient.java

@@ -7,6 +7,7 @@ import static org.lwjgl.opengl.GL20.*;
 
 import java.nio.ByteBuffer;
 import java.nio.FloatBuffer;
+import java.util.Map;
 
 import javax.vecmath.Matrix4f;
 import javax.vecmath.Vector3d;
@@ -33,6 +34,8 @@ import net.minecraft.client.renderer.block.model.ItemTransformVec3f;
 import net.minecraft.client.renderer.entity.RenderItem;
 import net.minecraft.client.renderer.texture.TextureManager;
 import net.minecraft.client.renderer.texture.TextureMap;
+import net.minecraft.client.renderer.tileentity.TileEntityRendererDispatcher;
+import net.minecraft.client.renderer.tileentity.TileEntitySpecialRenderer;
 import net.minecraft.client.renderer.vertex.VertexFormatElement;
 import net.minecraft.client.renderer.vertex.VertexFormatElement.EnumUsage;
 import net.minecraft.client.resources.I18n;
@@ -44,7 +47,9 @@ import net.minecraft.client.settings.GameSettings;
 import net.minecraft.entity.Entity;
 import net.minecraft.entity.EntityLivingBase;
 import net.minecraft.entity.player.EntityPlayer;
+import net.minecraft.item.Item;
 import net.minecraft.item.ItemStack;
+import net.minecraft.tileentity.TileEntity;
 import net.minecraft.util.BlockPos;
 import net.minecraft.util.EnumChatFormatting;
 import net.minecraft.util.EnumWorldBlockLayer;
@@ -79,6 +84,8 @@ import org.lwjgl.opengl.GL11;
 //import static net.minecraftforge.client.IItemRenderer.ItemRenderType.*;
 //import static net.minecraftforge.client.IItemRenderer.ItemRendererHelper.*;
 
+import com.google.common.collect.Maps;
+
 public class ForgeHooksClient
 {
     //private static final ResourceLocation ITEM_GLINT = new ResourceLocation("textures/misc/enchanted_item_glint.png");
@@ -678,4 +685,30 @@ public class ForgeHooksClient
             renderer.putColorRGBA(renderer.getColorIndex(i + 1), ncr, ncg, ncb, nca);
         }
     }
+
+    private static Map<Pair<Item, Integer>, Class<? extends TileEntity>> tileItemMap = Maps.newHashMap();
+
+    public static void renderTileItem(Item item, int metadata)
+    {
+        Class<? extends TileEntity> tileClass = tileItemMap.get(Pair.of(item,
+                metadata));
+        if (tileClass != null)
+        {
+            TileEntitySpecialRenderer r = TileEntityRendererDispatcher.instance
+                    .getSpecialRendererByClass(tileClass);
+            if (r != null)
+            {
+                r.renderTileEntityAt(null, 0, 0, 0, 0, -1);
+            }
+        }
+    }
+
+    /**
+     * @deprecated Will be removed as soon as possible, hopefully 1.9.
+     */
+    @Deprecated
+    public static void registerTESRItemStack(Item item, int metadata, Class<? extends TileEntity> TileClass)
+    {
+        tileItemMap.put(Pair.of(item, metadata), TileClass);
+    }
 }

src/test/java/net/minecraftforge/debug/ItemTileDebug.java

@@ -0,0 +1,137 @@
+package net.minecraftforge.debug;
+
+import net.minecraft.block.BlockContainer;
+import net.minecraft.block.material.Material;
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.renderer.GlStateManager;
+import net.minecraft.client.renderer.texture.TextureAtlasSprite;
+import net.minecraft.client.renderer.tileentity.TileEntitySpecialRenderer;
+import net.minecraft.client.resources.model.IBakedModel;
+import net.minecraft.client.resources.model.ModelResourceLocation;
+import net.minecraft.creativetab.CreativeTabs;
+import net.minecraft.item.Item;
+import net.minecraft.tileentity.TileEntity;
+import net.minecraft.world.World;
+import net.minecraftforge.client.ForgeHooksClient;
+import net.minecraftforge.client.event.ModelBakeEvent;
+import net.minecraftforge.client.model.ModelLoader;
+import net.minecraftforge.common.MinecraftForge;
+import net.minecraftforge.debug.ModelBakeEventDebug.BakeEventHandler;
+import net.minecraftforge.debug.ModelBakeEventDebug.ClientProxy;
+import net.minecraftforge.debug.ModelBakeEventDebug.CustomModel;
+import net.minecraftforge.fml.client.registry.ClientRegistry;
+import net.minecraftforge.fml.common.Mod;
+import net.minecraftforge.fml.common.Mod.EventHandler;
+import net.minecraftforge.fml.common.SidedProxy;
+import net.minecraftforge.fml.common.event.FMLPreInitializationEvent;
+import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
+import net.minecraftforge.fml.common.registry.GameRegistry;
+import static org.lwjgl.opengl.GL11.*;
+
+@Mod(modid = ItemTileDebug.MODID)
+public class ItemTileDebug
+{
+    public static final String MODID = "ForgeDebugItemTile";
+
+    private static String blockName = MODID.toLowerCase() + ":" + TestBlock.name;
+
+    @SidedProxy(serverSide = "net.minecraftforge.debug.ItemTileDebug$CommonProxy", clientSide = "net.minecraftforge.debug.ItemTileDebug$ClientProxy")
+    public static CommonProxy proxy;
+
+    @EventHandler
+    public void preInit(FMLPreInitializationEvent event) { proxy.preInit(event); }
+
+    public static class CommonProxy
+    {
+        public void preInit(FMLPreInitializationEvent event)
+        {
+            GameRegistry.registerBlock(TestBlock.instance, TestBlock.name);
+            GameRegistry.registerTileEntity(CustomTileEntity.class, MODID.toLowerCase() + ":custom_tile_entity");
+        }
+    }
+
+    public static class ClientProxy extends CommonProxy
+    {
+        private static ModelResourceLocation itemLocation = new ModelResourceLocation(blockName, "inventory");
+
+        @Override
+        public void preInit(FMLPreInitializationEvent event)
+        {
+            super.preInit(event);
+            ClientRegistry.bindTileEntitySpecialRenderer(CustomTileEntity.class, TestTESR.instance);
+            Item item = Item.getItemFromBlock(TestBlock.instance);
+            ForgeHooksClient.registerTESRItemStack(item, 0, CustomTileEntity.class);
+            ModelLoader.setCustomModelResourceLocation(item, 0, itemLocation);
+            MinecraftForge.EVENT_BUS.register(BakeEventHandler.instance);
+        }
+    }
+
+    public static class BakeEventHandler
+    {
+        public static final BakeEventHandler instance = new BakeEventHandler();
+
+        private BakeEventHandler() {};
+
+        @SubscribeEvent
+        public void onModelBakeEvent(ModelBakeEvent event)
+        {
+            event.modelManager.getBlockModelShapes().registerBuiltInBlocks(TestBlock.instance);
+        }
+    }
+
+    public static class TestTESR extends TileEntitySpecialRenderer
+    {
+        private static final TestTESR instance = new TestTESR();
+
+        private TestTESR() {}
+
+        @Override
+        public void renderTileEntityAt(TileEntity p_180535_1_, double x, double y, double z, float p_180535_8_, int p_180535_9_)
+        {
+            glPushMatrix();
+            glTranslated(x, y, z);
+            GlStateManager.disableTexture2D();
+            GlStateManager.disableLighting();
+            glColor4f(.2f, 1, .1f, 1);
+            glBegin(GL_QUADS);
+            glVertex3f(0, .5f, 0);
+            glVertex3f(0, .5f, 1);
+            glVertex3f(1, .5f, 1);
+            glVertex3f(1, .5f, 0);
+            glEnd();
+            glPopMatrix();
+            GlStateManager.enableTexture2D();
+            GlStateManager.enableLighting();
+        }
+    }
+
+    public static class TestBlock extends BlockContainer
+    {
+        public static final TestBlock instance = new TestBlock();
+        public static final String name = "custom_model_block";
+
+        private TestBlock()
+        {
+            super(Material.iron);
+            setCreativeTab(CreativeTabs.tabBlock);
+            setUnlocalizedName(MODID + ":" + name);
+        }
+
+        @Override
+        public boolean isOpaqueCube() { return false; }
+
+        @Override
+        public boolean isFullCube() { return false; }
+
+        @Override
+        public boolean isVisuallyOpaque() { return false; }
+
+        @Override
+        public TileEntity createNewTileEntity(World world, int meta)
+        {
+            return new CustomTileEntity();
+        }
+    }
+
+    public static class CustomTileEntity extends TileEntity {}
+}

src/test/resources/assets/forgedebugitemtile/models/item/custom_model_block.json

@@ -0,0 +1,3 @@
+{
+    "parent": "builtin/entity"
+}