Inline optimizations to state trackers by MatthiasM

src/java/org/lwjgl/opengl/ReferencesStack.java

@@ -40,23 +40,26 @@ 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();
+		int pos = ++stack_pos;
+		if (pos == references_stack.length) {
+			growStack();
 		}
-		references_stack[stack_pos].copy(references_stack[stack_pos - 1]);
+		references_stack[pos].copy(references_stack[pos - 1]);
 	}
 
 	public References popState() {
-		References result = references_stack[stack_pos];
-		references_stack[stack_pos].clear();
-		stack_pos--;
+		References result = references_stack[stack_pos--];
+		result.clear();
 		return result;
 	}
 
+	private void growStack() {
+		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();
+        }
+
 	ReferencesStack() {
 		references_stack = new References[1];
 		stack_pos = 0;

src/java/org/lwjgl/opengl/StateStack.java

@@ -39,24 +39,22 @@ class StateStack {
 		return state_stack[stack_pos];
 	}
 
-	public void setState(int new_state) {
-		state_stack[stack_pos] = new_state;
-	}
-
-	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;
+	public void pushState(int new_state) {
+		int pos = ++stack_pos;
+		if (pos == state_stack.length) {
+			growState();
 		}
-		state_stack[stack_pos] = state_stack[stack_pos - 1];
+		state_stack[pos] = new_state;
 	}
 
 	public int popState() {
-		int result = state_stack[stack_pos];
-		stack_pos--;
-		return result;
+		return state_stack[stack_pos--];
+	}
+
+	public void growState() {
+		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;
 	}
 
 	StateStack(int initial_value) {

src/java/org/lwjgl/opengl/StateTracker.java

@@ -49,14 +49,13 @@ final class StateTracker {
 			references_stack.popState();
 		}
 	}
-	
+
 	static void pushAttrib(ContextCapabilities caps, int mask) {
 		caps.tracker.doPushAttrib(mask);
 	}
 
 	private void doPushAttrib(int mask) {
-		attrib_stack.pushState();
-		attrib_stack.setState(mask);
+		attrib_stack.pushState(mask);
 		if ((mask & GL11.GL_CLIENT_VERTEX_ARRAY_BIT) != 0) {
 			references_stack.pushState();
 		}