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hammer/lpreview_thread.h

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: interface to asynchronous lighting preview creator
+//
+//===========================================================================//
+
+#ifndef LPREVIEW_THREAD_H
+#define LPREVIEW_THREAD_H
+#ifdef _WIN32
+#pragma once
+#endif
+
+#include "tier0/threadtools.h"
+#include "bitmap/bitmap.h"
+#include "bitmap/float_bm.h"
+#include "tier1/utlvector.h"
+#include "mathlib/lightdesc.h"
+
+
+
+
+
+class CLightingPreviewLightDescription : public LightDesc_t
+{
+public:
+	int m_nObjectID;
+	class CIncrementalLightInfo *m_pIncrementalInfo;
+	void Init( int obj_id )
+	{
+		m_pIncrementalInfo = NULL;
+		m_nObjectID = obj_id;
+	}
+};
+
+enum HammerToLightingPreviewMessageType
+{
+	// messages from hammer to preview task
+	LPREVIEW_MSG_STOP,									// no lighting previews open - stop working
+	LPREVIEW_MSG_EXIT,										// we're exiting program - shut down
+	LPREVIEW_MSG_GEOM_DATA,									  // we have new shadow geometry data
+	LPREVIEW_MSG_G_BUFFERS,							 // we have new g buffer data from the renderer
+	LPREVIEW_MSG_LIGHT_DATA,								// new light data in m_pLightList
+};
+
+enum LightingPreviewToHammerMessageType
+{
+	// messages from preview task to hammer
+	LPREVIEW_MSG_DISPLAY_RESULT,							// we have a result image
+};
+
+
+struct MessageToLPreview
+{
+	HammerToLightingPreviewMessageType m_MsgType;
+
+	MessageToLPreview( HammerToLightingPreviewMessageType mtype)
+	{
+		m_MsgType = mtype;
+	}
+	MessageToLPreview( void)
+	{
+	}
+
+	// this structure uses a fat format for the args instead of separate classes for each
+	// message. the messages are small anyway, since pointers are used for anything of size.
+	FloatBitMap_t *m_pDefferedRenderingBMs[4];				// if LPREVIEW_MSG_G_BUFFERS
+	CUtlVector<CLightingPreviewLightDescription> *m_pLightList;	// if LPREVIEW_MSG_LIGHT_DATA
+	Vector m_EyePosition;									// for LPREVIEW_MSG_LIGHT_DATA & G_BUFFERS
+	CUtlVector<Vector> *m_pShadowTriangleList;				// for LPREVIEW_MSG_GEOM_DATA
+	int m_nBitmapGenerationCounter;							// for LPREVIEW_MSG_G_BUFFERS
+
+};
+
+struct MessageFromLPreview
+{
+	LightingPreviewToHammerMessageType m_MsgType;
+	Bitmap_t *m_pBitmapToDisplay;							// for LPREVIEW_MSG_DISPLAY_RESULT
+	int m_nBitmapGenerationCounter;							// for LPREVIEW_MSG_DISPLAY_RESULT
+	MessageFromLPreview( LightingPreviewToHammerMessageType msgtype )
+	{
+		m_MsgType = msgtype;
+	}
+	MessageFromLPreview( void )
+	{
+	}
+
+};
+
+extern CMessageQueue<MessageToLPreview> g_HammerToLPreviewMsgQueue;
+extern CMessageQueue<MessageFromLPreview> g_LPreviewToHammerMsgQueue;
+extern ThreadHandle_t g_LPreviewThread;
+
+extern CInterlockedInt n_gbufs_queued;
+extern CInterlockedInt n_result_bms_queued;
+
+extern Bitmap_t *g_pLPreviewOutputBitmap;
+
+// the lighting preview thread entry point
+
+unsigned LightingPreviewThreadFN( void *thread_start_arg );
+
+// the lighting preview handler. call often
+void HandleLightingPreview( void );
+
+#endif
+