Attempt to allocate a 8-bit stencil buffer when creating Minecraft's display context. If that throws an error it will revert back to it's default values.

Also contains a method for modders to rereive how many bits the context was created with. Closes #552

client/net/minecraftforge/client/ForgeHooksClient.java

@@ -4,8 +4,11 @@ import java.util.HashMap;
 import java.util.Random;
 import java.util.TreeSet;
 
+import org.lwjgl.LWJGLException;
+import org.lwjgl.opengl.Display;
 import org.lwjgl.opengl.GL11;
 import org.lwjgl.opengl.GL12;
+import org.lwjgl.opengl.PixelFormat;
 
 import cpw.mods.fml.client.FMLClientHandler;
 
@@ -284,4 +287,21 @@ public class ForgeHooksClient
         ModelBiped modelbiped = itemStack.getItem().getArmorModel(entityLiving, itemStack, slotID);
         return modelbiped == null ? _default : modelbiped;
     }
+
+    static int stencilBits = 0;
+    public static void createDisplay() throws LWJGLException
+    {
+        PixelFormat format = new PixelFormat().withDepthBits(24);
+        try
+        {
+            //TODO: Figure out how to determine the max bits.
+            Display.create(format.withStencilBits(8));
+            stencilBits = 8;
+        }
+        catch(LWJGLException e)
+        {
+            Display.create(format);
+            stencilBits = 0;
+        }
+    }
 }

client/net/minecraftforge/client/MinecraftForgeClient.java

@@ -56,4 +56,9 @@ public class MinecraftForgeClient
     {
         return ForgeHooksClient.renderPass;
     }
+
+    public int getStencilBits()
+    {
+        return ForgeHooksClient.stencilBits;
+    }
 }

patches/minecraft/net/minecraft/client/Minecraft.java.patch

@@ -1,9 +1,10 @@
 --- ../src_base/minecraft/net/minecraft/client/Minecraft.java
 +++ ../src_work/minecraft/net/minecraft/client/Minecraft.java
-@@ -123,6 +123,13 @@
+@@ -123,6 +123,14 @@
  
  import com.google.common.collect.MapDifference;
  
++import net.minecraftforge.client.ForgeHooksClient;
 +import net.minecraftforge.client.GuiIngameForge;
 +import net.minecraftforge.common.ForgeHooks;
 +import net.minecraftforge.common.MinecraftForge;
@@ -14,7 +15,16 @@
  @SideOnly(Side.CLIENT)
  public abstract class Minecraft implements Runnable, IPlayerUsage
  {
-@@ -450,7 +457,7 @@
+@@ -372,7 +380,7 @@
+ 
+         try
+         {
+-            Display.create((new PixelFormat()).withDepthBits(24));
++            ForgeHooksClient.createDisplay();
+         }
+         catch (LWJGLException lwjglexception)
+         {
+@@ -450,7 +458,7 @@
          }
  
          this.checkGLError("Post startup");
@@ -23,7 +33,7 @@
  
          if (this.serverName != null)
          {
-@@ -1238,7 +1245,7 @@
+@@ -1238,7 +1246,7 @@
  
                  if (this.thePlayer.canCurrentToolHarvestBlock(j, k, l))
                  {
@@ -32,7 +42,7 @@
                      this.thePlayer.swingItem();
                  }
              }
-@@ -1304,7 +1311,8 @@
+@@ -1304,7 +1312,8 @@
                  {
                      int j1 = itemstack != null ? itemstack.stackSize : 0;
  
@@ -42,7 +52,7 @@
                      {
                          flag = false;
                          this.thePlayer.swingItem();
-@@ -1330,7 +1338,8 @@
+@@ -1330,7 +1339,8 @@
              {
                  ItemStack itemstack1 = this.thePlayer.inventory.getCurrentItem();
  
@@ -52,7 +62,7 @@
                  {
                      this.entityRenderer.itemRenderer.resetEquippedProgress2();
                  }
-@@ -2010,6 +2019,11 @@
+@@ -2010,6 +2020,11 @@
      {
          this.statFileWriter.syncStats();
  
@@ -64,7 +74,7 @@
          if (par1WorldClient == null)
          {
              NetClientHandler netclienthandler = this.getNetHandler();
-@@ -2027,6 +2041,18 @@
+@@ -2027,6 +2042,18 @@
              if (this.theIntegratedServer != null)
              {
                  this.theIntegratedServer.initiateShutdown();
@@ -83,7 +93,7 @@
              }
  
              this.theIntegratedServer = null;
-@@ -2354,103 +2380,12 @@
+@@ -2354,103 +2381,12 @@
          if (this.objectMouseOver != null)
          {
              boolean flag = this.thePlayer.capabilities.isCreativeMode;
@@ -191,7 +201,7 @@
  
              if (flag)
              {
-@@ -2539,11 +2474,18 @@
+@@ -2539,11 +2475,18 @@
          par1PlayerUsageSnooper.addData("gl_max_texture_size", Integer.valueOf(getGLMaximumTextureSize()));
      }
  
@@ -210,7 +220,7 @@
          for (int i = 16384; i > 0; i >>= 1)
          {
              GL11.glTexImage2D(GL11.GL_PROXY_TEXTURE_2D, 0, GL11.GL_RGBA, i, i, 0, GL11.GL_RGBA, GL11.GL_UNSIGNED_BYTE, (ByteBuffer)null);
-@@ -2551,6 +2493,7 @@
+@@ -2551,6 +2494,7 @@
  
              if (j != 0)
              {