li/cil/oc/client/gui/Screen.scala

package li.cil.oc.client.gui

import li.cil.oc.client.renderer.MonospaceFontRenderer
import li.cil.oc.client.renderer.gui.BufferRenderer
import li.cil.oc.common.tileentity
import li.cil.oc.util.RenderState
import org.lwjgl.opengl.GL11

class Screen(val screen: tileentity.Screen) extends Buffer {
  protected def buffer = screen.origin.buffer

  private val bufferMargin = BufferRenderer.margin + BufferRenderer.innerMargin

  private var x, y = 0

  override def initGui() {
    super.initGui()
    screen.origin.currentGui = Some(this)
  }

  override def onGuiClosed() = {
    super.onGuiClosed()
    screen.origin.currentGui = None
  }

  def drawBuffer() {
    GL11.glTranslatef(x, y, 0)
    BufferRenderer.drawBackground()
    if (screen.hasPower) {
      GL11.glTranslatef(bufferMargin, bufferMargin, 0)
      RenderState.makeItBlend()
      BufferRenderer.drawText()
    }
  }

  protected def changeSize(w: Double, h: Double) = {
    val bw = w * MonospaceFontRenderer.fontWidth
    val bh = h * MonospaceFontRenderer.fontHeight
    val scaleX = (width / (bw + bufferMargin * 2.0)) min 1
    val scaleY = (height / (bh + bufferMargin * 2.0)) min 1
    val scale = scaleX min scaleY
    val innerWidth = (bw * scale).toInt
    val innerHeight = (bh * scale).toInt
    x = (width - (innerWidth + bufferMargin * 2)) / 2
    y = (height - (innerHeight + bufferMargin * 2)) / 2
    BufferRenderer.compileBackground(innerWidth, innerHeight)
    scale
  }
}