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utils/xbox/MakeGameData/MakeShaders.cpp

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: .360 file creation of shaders
+//
+//=====================================================================================//
+
+#include "MakeGameData.h"
+#include "materialsystem/shader_vcs_version.h"
+
+#define SHADER_FILE_THRESHOLD		32*1024
+
+//-----------------------------------------------------------------------------
+// Get the preload data for a vcs file
+//-----------------------------------------------------------------------------
+bool GetPreloadData_VCS( const char *pFilename, CUtlBuffer &fileBufferIn, CUtlBuffer &preloadBufferOut )
+{
+	ShaderHeader_t *pHeader = (ShaderHeader_t *)fileBufferIn.Base();
+
+	unsigned int version = BigLong( pHeader->m_nVersion );
+
+	// ensure caller's buffer is clean
+	// caller determines preload size, via TellMaxPut()
+	preloadBufferOut.Purge();
+
+	unsigned int nPreloadSize;
+	if ( fileBufferIn.TellMaxPut() <= SHADER_FILE_THRESHOLD )
+	{
+		// include the whole file
+		nPreloadSize = fileBufferIn.TellMaxPut();
+	}
+	else
+	{
+		if ( version < SHADER_VCS_VERSION_NUMBER )
+		{
+			// not supporting old versions
+			return false;
+		}
+
+		if ( version != SHADER_VCS_VERSION_NUMBER )
+		{
+			// bad version
+			Msg( "Can't preload: '%s', expecting version %d got version %d\n", pFilename, SHADER_VCS_VERSION_NUMBER, version );
+			return false;
+		}
+
+		nPreloadSize = sizeof( ShaderHeader_t ) + BigLong( pHeader->m_nNumStaticCombos ) * sizeof( StaticComboRecord_t );
+	}
+
+	preloadBufferOut.Put( fileBufferIn.Base(), nPreloadSize );
+
+	return true;
+}