src/main/scala/li/cil/oc/client/gui/DynamicGuiContainer.scala

package li.cil.oc.client.gui

import li.cil.oc.client.Textures
import li.cil.oc.common.container.ComponentSlot
import li.cil.oc.util.RenderState
import net.minecraft.client.gui.inventory.GuiContainer
import net.minecraft.client.renderer.Tessellator
import net.minecraft.client.renderer.texture.TextureMap
import net.minecraft.inventory.{Container, Slot}
import net.minecraft.util.StatCollector
import org.lwjgl.opengl.GL11
import li.cil.oc.common.InventorySlots.Tier

abstract class DynamicGuiContainer(container: Container) extends GuiContainer(container) {
  override def drawGuiContainerForegroundLayer(mouseX: Int, mouseY: Int) {
    fontRenderer.drawString(
      StatCollector.translateToLocal("container.inventory"),
      8, ySize - 96 + 2, 0x404040)
  }

  override def drawGuiContainerBackgroundLayer(dt: Float, mouseX: Int, mouseY: Int) {
    mc.renderEngine.bindTexture(Textures.guiBackground)
    drawTexturedModalRect(guiLeft, guiTop, 0, 0, xSize, ySize)
  }

  override def drawSlotInventory(slot: Slot) {
    slot match {
      case component: ComponentSlot if component.tier == Tier.None => // Ignore.
      case _ =>
        if (slot.slotNumber < container.inventorySlots.size() - 36) {
          GL11.glDisable(GL11.GL_LIGHTING)
          drawSlotBackground(slot.xDisplayPosition - 1, slot.yDisplayPosition - 1)
          GL11.glEnable(GL11.GL_LIGHTING)
        }
        RenderState.makeItBlend()
        super.drawSlotInventory(slot)
        GL11.glDisable(GL11.GL_BLEND)
        if (!slot.getHasStack) slot match {
          case component: ComponentSlot if component.tierIcon != null =>
            mc.getTextureManager.bindTexture(TextureMap.locationItemsTexture)
            GL11.glDisable(GL11.GL_DEPTH_TEST)
            GL11.glDisable(GL11.GL_LIGHTING)
            drawTexturedModelRectFromIcon(slot.xDisplayPosition, slot.yDisplayPosition, component.tierIcon, 16, 16)
            GL11.glEnable(GL11.GL_LIGHTING)
            GL11.glEnable(GL11.GL_DEPTH_TEST)
          case _ =>
        }
    }
  }

  private def drawSlotBackground(x: Int, y: Int) {
    GL11.glColor4f(1, 1, 1, 1)
    mc.renderEngine.bindTexture(Textures.guiSlot)
    val t = Tessellator.instance
    t.startDrawingQuads()
    t.addVertexWithUV(x, y + 18, zLevel, 0, 1)
    t.addVertexWithUV(x + 18, y + 18, zLevel, 1, 1)
    t.addVertexWithUV(x + 18, y, zLevel, 1, 0)
    t.addVertexWithUV(x, y, zLevel, 0, 0)
    t.draw()
  }
}