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package li.cil.oc.util
import li.cil.oc.OpenComputers
import li.cil.oc.Settings
import net.minecraft.client.Minecraft
import net.minecraft.client.renderer.RenderHelper
import org.lwjgl.opengl._
import org.lwjgl.util.glu.GLU
object RenderState {
val arb = GLContext.getCapabilities.GL_ARB_multitexture && !GLContext.getCapabilities.OpenGL13
def checkError(where: String) {
val error = GL11.glGetError
if (error != 0 && Settings.get.logOpenGLErrors) {
OpenComputers.log.warn("GL ERROR @ " + where + ": " + GLU.gluErrorString(error))
}
}
def compilingDisplayList = {
if (GL11.glGetInteger(GL11.GL_LIST_INDEX) != 0) {
val mode = GL11.glGetInteger(GL11.GL_LIST_MODE)
mode == GL11.GL_COMPILE || mode == GL11.GL_COMPILE_AND_EXECUTE
}
else false
}
def disableLighting() {
Minecraft.getMinecraft.entityRenderer.disableLightmap(0)
RenderHelper.disableStandardItemLighting()
}
def enableLighting() {
Minecraft.getMinecraft.entityRenderer.enableLightmap(0)
RenderHelper.enableStandardItemLighting()
}
def makeItBlend() {
GL11.glEnable(GL11.GL_BLEND)
GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA)
}
def setBlendAlpha(alpha: Float) = {
GL11.glColor4f(1, 1, 1, alpha)
GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE)
}
}