Backport: Fix compatibility with CCL and any other mods that use the old proxy object pattern

src/main/java/com/minelittlepony/ducks/IRenderItem.java

@@ -1,9 +0,0 @@
-package com.minelittlepony.ducks;
-
-public interface IRenderItem {
-
-    /**
-     * Sets whether items should be rendered with transparency support.
-     */
-    void useTransparency(boolean use);
-}

src/main/java/com/minelittlepony/mixin/MixinGlStateManager.java

@@ -6,7 +6,6 @@ import org.spongepowered.asm.mixin.injection.Inject;
 import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
 
 import com.minelittlepony.render.LevitatingItemRenderer;
-import com.minelittlepony.render.skull.PonySkullRenderer;
 
 import net.minecraft.client.renderer.GlStateManager;
 
@@ -15,8 +14,7 @@ public abstract class MixinGlStateManager {
 
     @Inject(method = "enableBlendProfile(Lnet/minecraft/client/renderer/GlStateManager$Profile;)V", at = @At("HEAD"), cancellable = true)
     private static void enableBlendProfile(GlStateManager.Profile profile, CallbackInfo info) {
-        if (profile == GlStateManager.Profile.PLAYER_SKIN && PonySkullRenderer.ponyInstance.usesTransparency()) {
-            LevitatingItemRenderer.enableItemGlowRenderProfile();
+        if (profile == GlStateManager.Profile.PLAYER_SKIN && LevitatingItemRenderer.enableItemGlowRenderProfile()) {
             info.cancel();
         }
     }

src/main/java/com/minelittlepony/mixin/MixinRenderItem.java

@@ -1,6 +1,5 @@
 package com.minelittlepony.mixin;
 
-import com.minelittlepony.ducks.IRenderItem;
 import com.minelittlepony.render.LevitatingItemRenderer;
 
 import net.minecraft.client.renderer.RenderItem;
@@ -15,33 +14,24 @@ import org.spongepowered.asm.mixin.injection.ModifyArg;
 import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
 
 @Mixin(RenderItem.class)
-public abstract class MixinRenderItem implements IResourceManagerReloadListener, IRenderItem {
-
-    private boolean transparency;
-
-    @Override
-    public void useTransparency(boolean transparency) {
-        this.transparency = transparency;
-    }
+public abstract class MixinRenderItem implements IResourceManagerReloadListener {
 
     @Inject(method = "renderItem(Lnet/minecraft/item/ItemStack;Lnet/minecraft/client/renderer/block/model/IBakedModel;)V", at = @At("HEAD"))
     private void onRenderItem(ItemStack stack, IBakedModel model, CallbackInfo info) {
-        if (transparency) {
         LevitatingItemRenderer.enableItemGlowRenderProfile();
     }
-    }
 
     @ModifyArg(method = "renderQuads(Lnet/minecraft/client/renderer/BufferBuilder;Ljava/util/List;ILnet/minecraft/item/ItemStack;)V",
             at = @At(value = "INVOKE",
                     target = "Lnet/minecraft/client/renderer/RenderItem;renderQuad(Lnet/minecraft/client/renderer/BufferBuilder;Lnet/minecraft/client/renderer/block/model/BakedQuad;I)V"),
             index = 2)
     private int modifyItemRenderTint(int color) {
-        return transparency ? -1 : color;
+        return LevitatingItemRenderer.usesTransparency() ? -1 : color;
     }
 
     @Inject(method = "renderEffect(Lnet/minecraft/client/renderer/block/model/IBakedModel;)V", at = @At("HEAD"), cancellable = true)
     private void renderEffect(IBakedModel model, CallbackInfo info) {
-        if (transparency) {
+        if (LevitatingItemRenderer.usesTransparency()) {
             info.cancel();
         }
     }

src/main/java/com/minelittlepony/render/LevitatingItemRenderer.java

@@ -3,9 +3,7 @@ package com.minelittlepony.render;
 import org.lwjgl.opengl.GL14;
 
 import com.minelittlepony.MineLittlePony;
-import com.minelittlepony.ducks.IRenderItem;
 import com.minelittlepony.pony.data.IPony;
-import com.minelittlepony.render.skull.PonySkullRenderer;
 import com.minelittlepony.util.render.Color;
 import com.mumfrey.liteloader.client.overlays.IMinecraft;
 
@@ -25,12 +23,22 @@ import static net.minecraft.client.renderer.GlStateManager.*;
 
 public class LevitatingItemRenderer {
 
-    public static void enableItemGlowRenderProfile() {
+    private static boolean usingTransparency;
+
+    public static boolean enableItemGlowRenderProfile() {
+        if (usesTransparency()) {
             GlStateManager.enableBlend();
             GlStateManager.tryBlendFuncSeparate(SourceFactor.CONSTANT_COLOR, DestFactor.ONE, SourceFactor.ONE, DestFactor.ZERO);
             Minecraft.getMinecraft().entityRenderer.disableLightmap();
         }
 
+        return usesTransparency();
+    }
+
+    public static boolean usesTransparency() {
+        return usingTransparency;
+    }
+
     /**
      * Renders a magical overlay over an item in third person.
      */
@@ -40,18 +48,17 @@ public class LevitatingItemRenderer {
         setColor(glowColor);
 
         RenderItem renderItem = Minecraft.getMinecraft().getRenderItem();
-        ((IRenderItem) renderItem).useTransparency(true);
-        PonySkullRenderer.ponyInstance.useTransparency(true);
 
-        scale(1.1, 1.1, 1.1);
+        usingTransparency = true;
 
-        translate(0, 0.01F, 0.01F);
+        scale(1.1F, 1.1F, 1.1F);
+
+        translate(0.1F, 0.01F, 0.01F);
         renderItem.renderItem(drop, entity, transform, hand == EnumHandSide.LEFT);
-        translate(0.01F, -0.01F, -0.02F);
+        translate(-0.02F, -0.02F, -0.02F);
         renderItem.renderItem(drop, entity, transform, hand == EnumHandSide.LEFT);
 
-        ((IRenderItem) renderItem).useTransparency(false);
-        PonySkullRenderer.ponyInstance.useTransparency(false);
+        usingTransparency = false;
         unsetColor();
         enableLighting();
         popMatrix();
@@ -86,21 +93,18 @@ public class LevitatingItemRenderer {
         if (doMagic) {
             disableLighting();
 
-            IRenderItem renderItem = (IRenderItem)Minecraft.getMinecraft().getRenderItem();
-            renderItem.useTransparency(true);
-            PonySkullRenderer.ponyInstance.useTransparency(true);
+            usingTransparency = true;
 
             setColor(pony.getMetadata().getGlowColor());
 
             scale(1.1, 1.1, 1.1);
 
-            translate(-0.015F, 0.01F, 0.01F);
+            translate(0.01F, 0.01F, 0.01F);
             renderer.renderItemSide(entity, stack, transform, left);
-            translate(0.03F, -0.01F, -0.02F);
+            translate(-0.02F, -0.02F, -0.02F);
             renderer.renderItemSide(entity, stack, transform, left);
 
-            renderItem.useTransparency(false);
-            PonySkullRenderer.ponyInstance.useTransparency(false);
+            usingTransparency = false;
 
             unsetColor();
             enableLighting();

src/main/java/com/minelittlepony/render/skull/PonySkullRenderer.java

@@ -2,8 +2,8 @@ package com.minelittlepony.render.skull;
 
 import com.minelittlepony.MineLittlePony;
 import com.minelittlepony.PonyConfig;
-import com.minelittlepony.ducks.IRenderItem;
 import com.minelittlepony.pony.data.IPony;
+import com.minelittlepony.render.LevitatingItemRenderer;
 import com.mojang.authlib.GameProfile;
 import com.mumfrey.liteloader.util.ModUtilities;
 import net.minecraft.client.renderer.GlStateManager;
@@ -20,7 +20,7 @@ import javax.annotation.Nullable;
 /**
  * PonySkullRenderer! It renders ponies as skulls, or something...
  */
-public class PonySkullRenderer extends TileEntitySkullRenderer implements IRenderItem {
+public class PonySkullRenderer extends TileEntitySkullRenderer {
 
     public static final int SKELETON = 0;
     public static final int WITHER = 1;
@@ -68,8 +68,6 @@ public class PonySkullRenderer extends TileEntitySkullRenderer implements IRende
         return instance;
     }
 
-    protected boolean transparency = false;
-
     @Override
     public void renderSkull(float x, float y, float z, EnumFacing facing, float rotation, int skullType, @Nullable GameProfile profile, int destroyStage, float animateTicks) {
 
@@ -111,7 +109,7 @@ public class PonySkullRenderer extends TileEntitySkullRenderer implements IRende
         GlStateManager.scale(-1, -1, 1);
         GlStateManager.enableAlpha();
 
-        skull.preRender(transparency);
+        skull.preRender(LevitatingItemRenderer.usesTransparency());
         skull.render(animateTicks, rotation, scale);
 
         GlStateManager.popMatrix();
@@ -146,15 +144,6 @@ public class PonySkullRenderer extends TileEntitySkullRenderer implements IRende
         return rotation;
     }
 
-    @Override
-    public void useTransparency(boolean use) {
-        transparency = use;
-    }
-
-    public boolean usesTransparency() {
-        return transparency;
-    }
-
     /**
      * A skull, just a skull.
      *

src/main/java/com/minelittlepony/transform/PostureElytra.java

@@ -1,6 +1,5 @@
 package com.minelittlepony.transform;
 
-import com.minelittlepony.model.AbstractPonyModel;
 import com.minelittlepony.model.capabilities.IModel;
 
 import net.minecraft.client.renderer.GlStateManager;