Blur/src/main/java/com/tterrag/blur/mixin/MixinScreen.java

package com.tterrag.blur.mixin;

import com.tterrag.blur.Blur;
import net.minecraft.client.gui.screen.Screen;
import org.spongepowered.asm.mixin.Mixin;
import org.spongepowered.asm.mixin.injection.Constant;
import org.spongepowered.asm.mixin.injection.ModifyConstant;

@Mixin(Screen.class)
public class MixinScreen {

    @ModifyConstant(
            method = "renderBackground(I)V",
            constant = @Constant(intValue = -1072689136))
    public int getFirstBackgroundColor(int color) {
        return Blur.instance.getBackgroundColor(false);
    }

    @ModifyConstant(
            method = "renderBackground(I)V",
            constant = @Constant(intValue = -804253680))
    public int getSecondBackgroundColor(int color) {
        return Blur.instance.getBackgroundColor(true);
    }
}