3 files changed, 119 insertions, 0 deletions
diff --git a/src/main/java/de/hype/bbsentials/communication/highlighter.java b/src/main/java/de/hype/bbsentials/communication/highlighter.java
new file mode 100644
index 0000000..4809a5c
--- /dev/null
+++ b/src/main/java/de/hype/bbsentials/communication/highlighter.java
@@ -0,0 +1,92 @@
+//https://github.com/AHilyard/ItemBorders/blob/main/src/main/java/com/anthonyhilyard/itemborders/ItemBorders.java
+package de.hype;
+
+import net.minecraft.ChatFormatting;
+import net.minecraft.client.renderer.MultiBufferSource;
+import net.minecraft.client.renderer.MultiBufferSource.BufferSource;
+import net.minecraft.network.chat.TextColor;
+import net.minecraft.world.inventory.Slot;
+import net.minecraft.world.item.ItemStack;
+
+import com.mojang.blaze3d.systems.RenderSystem;
+import com.mojang.blaze3d.vertex.PoseStack;
+import com.mojang.blaze3d.vertex.Tesselator;
+import com.mojang.math.Matrix4f;
+
+public class ItemBorders
+{
+	public static void renderBorder(PoseStack poseStack, Slot slot)
+	{
+		// Container GUIs.
+		render(poseStack, slot.getItem(), slot.x, slot.y);
+	}
+
+	public static void renderBorder(PoseStack poseStack, ItemStack item, int x, int y)
+	{
+		// If borders are enabled for the hotbar...
+		if (ItemBordersConfig.INSTANCE.hotBar.get())
+		{
+			render(new PoseStack(), item, x, y);
+		}
+	}
+
+	private static void render(PoseStack poseStack, ItemStack item, int x, int y)
+	{
+		if (item.isEmpty())
+		{
+			return;
+		}
+
+		TextColor color = ItemBordersConfig.INSTANCE.getBorderColorForItem(item);
+
+		// If the color is null, default to white.
+		if (color == null)
+		{
+			color = TextColor.fromLegacyFormat(ChatFormatting.WHITE);
+		}
+
+		if (color.getValue() == ChatFormatting.WHITE.getColor() && !ItemBordersConfig.INSTANCE.showForCommon.get())
+		{
+			return;
+		}
+
+		RenderSystem.disableDepthTest();
+
+		poseStack.pushPose();
+		poseStack.translate(0, 0, ItemBordersConfig.INSTANCE.overItems.get() ? 290 : 100);
+		Matrix4f matrix = poseStack.last().pose();
+
+		int startColor = color.getValue() | 0xEE000000;
+		int endColor = color.getValue() & 0x00FFFFFF;
+
+		int topColor = ItemBordersConfig.INSTANCE.fullBorder.get() ? startColor : endColor;
+		int bottomColor = startColor;
+
+		int xOffset = ItemBordersConfig.INSTANCE.squareCorners.get() ? 0 : 1;
+
+		BufferSource bufferSource = MultiBufferSource.immediate(Tesselator.getInstance().getBuilder());
+		GuiUtils.drawGradientRect(matrix, -1, x,      y + 1,  x + 1,  y + 15, topColor, bottomColor);
+		GuiUtils.drawGradientRect(matrix, -1, x + 15, y + 1,  x + 16, y + 15, topColor, bottomColor);
+
+		GuiUtils.drawGradientRect(matrix, -1, x + xOffset,  y, x + 16 - xOffset, y + 1, topColor, topColor);
+		GuiUtils.drawGradientRect(matrix, -1, x + xOffset,  y + 15, x + 16 - xOffset, y + 16, bottomColor, bottomColor);
+
+		if (ItemBordersConfig.INSTANCE.extraGlow.get())
+		{
+			int topAlpha = ((topColor >> 24) & 0xFF) / 3;
+			int bottomAlpha = ((bottomColor >> 24) & 0xFF) / 3;
+
+			int topGlowColor = (topAlpha << 24) | (topColor & 0x00FFFFFF);
+			int bottomGlowColor = (bottomAlpha << 24) | (bottomColor & 0x00FFFFFF);
+
+			GuiUtils.drawGradientRect(matrix, -1, x + 1,      y + 1,  x + 2,  y + 15, topGlowColor, bottomGlowColor);
+			GuiUtils.drawGradientRect(matrix, -1, x + 14, y + 1,  x + 15, y + 15, topGlowColor, bottomGlowColor);
+
+			GuiUtils.drawGradientRect(matrix, -1, x + 1,  y + 1, x + 15, y + 2, topGlowColor, topGlowColor);
+			GuiUtils.drawGradientRect(matrix, -1, x + 1,  y + 14, x + 15, y + 15, bottomGlowColor, bottomGlowColor);
+		}
+
+		bufferSource.endBatch();
+		poseStack.popPose();
+	}
+}
+\ No newline at end of file
diff --git a/src/main/java/de/hype/bbsentials/mixins/renderItemMixin.java b/src/main/java/de/hype/bbsentials/mixins/renderItemMixin.java
new file mode 100644
index 0000000..c4ab2cd
--- /dev/null
+++ b/src/main/java/de/hype/bbsentials/mixins/renderItemMixin.java
@@ -0,0 +1,26 @@
+import com.anthonyhilyard.itemborders.ItemBorders;
+import com.mojang.blaze3d.vertex.PoseStack;
+
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.At.Shift;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+import net.minecraft.client.gui.screens.Screen;
+import net.minecraft.client.gui.screens.inventory.AbstractContainerScreen;
+import net.minecraft.world.inventory.Slot;
+import net.minecraft.network.chat.Component;
+
+@Mixin(AbstractContainerScreen.class)
+public class AbstractContainerScreenMixin extends Screen
+{
+	protected AbstractContainerScreenMixin(Component titleIn) { super(titleIn); }
+
+	@Inject(method = "renderSlot", at = @At(value = "INVOKE",
+			target = "Lnet/minecraft/client/renderer/entity/ItemRenderer;renderAndDecorateItem(Lnet/minecraft/world/entity/LivingEntity;Lnet/minecraft/world/item/ItemStack;III)V", shift = Shift.AFTER))
+	public void renderSlot(PoseStack poseStack, Slot slot, CallbackInfo info)
+	{
+		ItemBorders.renderBorder(poseStack, slot);
+	}
+}
+\ No newline at end of file
diff --git a/src/main/resources/modid.mixins.json b/src/main/resources/modid.mixins.json
index 50a63d3..62ccbf4 100644
--- a/src/main/resources/modid.mixins.json
+++ b/src/main/resources/modid.mixins.json
@@ -9,6 +9,7 @@
   ],
   "client": [
     "SimpleOptionMixin",
+    "renderItemMixin",
     "ClientCommandSourceMixin"],
   "injectors": {
     "defaultRequire": 1