From 6e1913e4dfb139d2880062157191d0374edd8037 Mon Sep 17 00:00:00 2001
From: Elias Naur <elias.naur@gmail.com>
Date: Mon, 31 Jul 2006 22:54:21 +0000
Subject: [PATCH] Don't trust GL_MAX_CLIENT_ATTRIB_STACK_DEPTH since it is 0 on
 Xgl in linux. Instead make sure the state trackers are sized according to
 demand

---
 src/java/org/lwjgl/opengl/ReferencesStack.java | 12 +++++++++---
 src/java/org/lwjgl/opengl/StateStack.java      | 13 ++++++++-----
 src/java/org/lwjgl/opengl/StateTracker.java    |  9 ++-------
 3 files changed, 19 insertions(+), 15 deletions(-)

diff --git a/src/java/org/lwjgl/opengl/ReferencesStack.java b/src/java/org/lwjgl/opengl/ReferencesStack.java
index 87d7aeea..0580c323 100644
--- a/src/java/org/lwjgl/opengl/ReferencesStack.java
+++ b/src/java/org/lwjgl/opengl/ReferencesStack.java
@@ -32,7 +32,7 @@
 package org.lwjgl.opengl;
 
 class ReferencesStack {
-	private final References[] references_stack;
+	private References[] references_stack;
 	private int stack_pos;
 
 	public References getReferences() {
@@ -41,6 +41,12 @@ class ReferencesStack {
 
 	public void pushState() {
 		stack_pos++;
+		if (stack_pos == references_stack.length) {
+			References[] new_references_stack = new References[references_stack.length + 1];
+			System.arraycopy(references_stack, 0, new_references_stack, 0, references_stack.length);
+			references_stack = new_references_stack;
+			references_stack[references_stack.length - 1] = new References();
+		}
 		references_stack[stack_pos].copy(references_stack[stack_pos - 1]);
 	}
 
@@ -51,8 +57,8 @@ class ReferencesStack {
 		return result;
 	}
 
-	ReferencesStack(int stack_size) {
-		references_stack = new References[stack_size];
+	ReferencesStack() {
+		references_stack = new References[1];
 		stack_pos = 0;
 		for (int i = 0; i < references_stack.length; i++)
 			references_stack[i] = new References();
diff --git a/src/java/org/lwjgl/opengl/StateStack.java b/src/java/org/lwjgl/opengl/StateStack.java
index 14b1b127..a989f60e 100644
--- a/src/java/org/lwjgl/opengl/StateStack.java
+++ b/src/java/org/lwjgl/opengl/StateStack.java
@@ -32,9 +32,7 @@
 package org.lwjgl.opengl;
 
 class StateStack {
-
-	/** Only int state is tracked */
-	private final int[] state_stack;
+	private int[] state_stack;
 	private int stack_pos;
 
 	public int getState() {
@@ -47,6 +45,11 @@ class StateStack {
 
 	public void pushState() {
 		stack_pos++;
+		if (stack_pos == state_stack.length) {
+			int[] new_state_stack = new int[state_stack.length + 1];
+			System.arraycopy(state_stack, 0, new_state_stack, 0, state_stack.length);
+			state_stack = new_state_stack;
+		}
 		state_stack[stack_pos] = state_stack[stack_pos - 1];
 	}
 
@@ -56,8 +59,8 @@ class StateStack {
 		return result;
 	}
 
-	StateStack(int stack_size, int initial_value) {
-		state_stack = new int[stack_size];
+	StateStack(int initial_value) {
+		state_stack = new int[1];
 		stack_pos = 0;
 		state_stack[stack_pos] = initial_value;
 	}
diff --git a/src/java/org/lwjgl/opengl/StateTracker.java b/src/java/org/lwjgl/opengl/StateTracker.java
index 5cdbba61..bf10562f 100644
--- a/src/java/org/lwjgl/opengl/StateTracker.java
+++ b/src/java/org/lwjgl/opengl/StateTracker.java
@@ -31,19 +31,14 @@
  */
 package org.lwjgl.opengl;
 
-
-/** Track Vertex Buffer Objects by context. */
 final class StateTracker {
 	private final ReferencesStack references_stack;
 	
 	private final StateStack attrib_stack;
 
 	StateTracker() {
-		int stack_size = Math.max(1, Util.glGetInteger(GL11.GL_MAX_CLIENT_ATTRIB_STACK_DEPTH));
-
-		references_stack = new ReferencesStack(stack_size);
-
-		attrib_stack = new StateStack(stack_size, 0);
+		references_stack = new ReferencesStack();
+		attrib_stack = new StateStack(0);
 	}
 
 	static void popAttrib() {