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utils/studiomdl/hardwarevertexcache.cpp

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//=============================================================================//
+
+#include <stdlib.h>
+#include <stdio.h>
+#include "HardwareVertexCache.h"
+
+CHardwareVertexCache::CHardwareVertexCache()
+{
+	m_Fifo = NULL;
+	m_Size = 0;
+	Flush();
+}
+
+void CHardwareVertexCache::Init( int size )
+{
+	m_Size = size;
+	m_Fifo = new int[size];
+	Flush();
+}
+
+void CHardwareVertexCache::Flush( void )
+{
+	m_HeadIndex = 0;
+	m_NumEntries = 0;
+}
+
+bool CHardwareVertexCache::IsPresent( int index )
+{
+	int i;
+//	printf( "testing if %d is present\n", index );
+	for( i = 0; i < m_NumEntries; i++ )
+	{
+		if( m_Fifo[( m_HeadIndex + i ) % m_Size] == index )
+		{
+//			printf( "yes!\n" );
+			return true;
+		}
+	}
+//	printf( "no!\n" );
+//	Print();
+	return false;
+}
+
+void CHardwareVertexCache::Insert( int index )
+{
+//	printf( "Inserting: %d\n", index );
+	m_Fifo[( m_HeadIndex + m_NumEntries ) % m_Size] = index;
+	if( m_NumEntries == m_Size )
+	{
+		m_HeadIndex = ( m_HeadIndex + 1 ) % m_Size;
+	}
+	else
+	{
+		m_NumEntries++;
+	}
+//	Print();
+}
+
+void CHardwareVertexCache::Print( void )
+{
+	int i;
+	for( i = 0; i < m_NumEntries; i++ )
+	{
+		printf( "fifo entry %d: %d\n", i, ( int )m_Fifo[( m_HeadIndex + i ) % m_Size] );
+	}
+}