source-engine/engine/buildcubemaps.cpp

//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose: 
//
// $Workfile:     $
// $Date:         $
// $NoKeywords: $
//===========================================================================//

// HDRFIXME: reduce the number of include files here.
#include "render_pch.h"
#include "client.h"
#include "cdll_int.h"
#include "lightcache.h"
#include "client_class.h"
#include "icliententitylist.h"
#include "traceinit.h"
#include "server.h"
#include "ispatialpartitioninternal.h"
#include "cdll_engine_int.h"
#include "filesystem.h"
#include "filesystem_engine.h"
#include "ivtex.h"
#include "materialsystem/itexture.h"
#include "view.h"
#include "tier0/dbg.h"
#include "tier2/fileutils.h"
#include "staticpropmgr.h"
#include "icliententity.h"
#include "gl_drawlights.h"
#include "Overlay.h"
#include "vmodes.h"
#include "gl_cvars.h"
#include "utlbuffer.h"
#include "vtf/vtf.h"
#include "bitmap/imageformat.h"
#include "cbenchmark.h"
#include "r_decal.h"
#include "ivideomode.h"
#include "tier0/icommandline.h"
#include "dmxloader/dmxelement.h"
#include "dmxloader/dmxloader.h"
#include "bitmap/float_bm.h"
#include "tier2/tier2.h"
#include "../utils/common/bsplib.h"
#include "ibsppack.h"

// memdbgon must be the last include file in a .cpp file!!!
#include "tier0/memdbgon.h"

// putting this here so that it is replicated to the client.dll and materialsystem.dll
ConVar dynamic_tonemap( "mat_dynamic_tonemapping", "1", FCVAR_CHEAT );
ConVar building_cubemaps( "building_cubemaps", "0" );
ConVar reload_materials( "reload_materials", "0" );
ConVar r_DrawBeams( "r_DrawBeams", "1", FCVAR_CHEAT, "0=Off, 1=Normal, 2=Wireframe" );

static ConVar mat_force_tonemap_scale( "mat_force_tonemap_scale", "0.0", FCVAR_CHEAT );

static const char *facingName[6] = { "rt", "lf", "bk", "ft", "up", "dn" };

//-----------------------------------------------------------------------------
// Load, unload vtex 
//-----------------------------------------------------------------------------
IVTex* VTex_Load( CSysModule** pModule )
{
	// load the vtex dll
	IVTex *pIVTex = NULL;
	*pModule = FileSystem_LoadModule( "vtex_dll" );
	if ( *pModule )
	{
		CreateInterfaceFn factory = Sys_GetFactory( *pModule );
		if ( factory )
		{
			pIVTex = ( IVTex * )factory( IVTEX_VERSION_STRING, NULL );
		}
	}

	if ( !pIVTex )
	{
		ConMsg( "Can't load vtex_dll.dll\n" );
	}

	return pIVTex;
}

void VTex_Unload( CSysModule *pModule )
{
	FileSystem_UnloadModule( pModule );
}


//-----------------------------------------------------------------------------
// Main entry point for taking cubemap snapshots
//-----------------------------------------------------------------------------
static void TakeCubemapSnapshot( const Vector &origin, const char *pFileNameBase, int screenBufSize,
						 int tgaSize, bool bPFM )
{
	if ( IsX360() )
		return;

	if ( g_LostVideoMemory )
		return;

	ITexture *pSaveRenderTarget = NULL;
	
	CMatRenderContextPtr pRenderContext( materials );

	// HDRFIXME: push/pop
	if( bPFM )
	{
		pSaveRenderTarget = pRenderContext->GetRenderTarget();
		pRenderContext->SetRenderTarget( NULL );
	}

	// HACK HACK HACK!!!!  
	// If this is lower than the size of the render target (I think) we don't get water.
	screenBufSize = 512;
	
	char	name[1024];
	CViewSetup	view;
	memset( &view, 0, sizeof(view) );
	view.origin = origin;
	view.m_flAspectRatio = 1.0f;
	view.m_bRenderToSubrectOfLargerScreen = true;

	// garymcthack
	view.zNear = 8.0f;
	view.zFar = 28400.0f;

	view.x = 0;
	view.y = 0;

	view.width = ( float )screenBufSize;
	view.height = ( float )screenBufSize;


	const char *pExtension = ".tga";
	if( bPFM )
	{
		pExtension = ".pfm";
	}

	Shader_BeginRendering();

	if( bPFM )
	{
		int backbufferWidth, backbufferHeight;
		materials->GetBackBufferDimensions( backbufferWidth, backbufferHeight );
		pRenderContext->Viewport( 0, 0, backbufferWidth, backbufferHeight );
		pRenderContext->ClearColor3ub( 128, 128, 128 );
		pRenderContext->ClearBuffers( true, true );
	}

	int nFlags = VIEW_CLEAR_COLOR | VIEW_CLEAR_DEPTH;
	
	// NOTE: This is for a workaround on ATI with building cubemaps.  
	// Clearing just the viewport doesn't seem to work properly.
	nFlags |= VIEW_CLEAR_FULL_TARGET;
	
	static float angle0[6]={0,0,0,0,-90,90};
	static float angle1[6]={0,180,90,270,0,0};
	static CubeMapFaceIndex_t face_idx[6]={CUBEMAP_FACE_RIGHT,CUBEMAP_FACE_LEFT,
										CUBEMAP_FACE_BACK,CUBEMAP_FACE_FRONT,
										CUBEMAP_FACE_UP,CUBEMAP_FACE_DOWN};
	static int engine_cubemap_idx_to_fbm_idx[6]={4,3,0,2,5,1};

	if (bPFM)
	{
		FloatCubeMap_t Envmap(tgaSize, tgaSize);
		for(int side=0;side<6;side++)
		{
			view.angles[0] = angle0[side];
			view.angles[1] = angle1[side];
			view.angles[2] = 0;
			view.fov = 90;
			view.fovViewmodel = 90;
			view.origin = origin;
			if (g_pMaterialSystemHardwareConfig->GetHDRType() == HDR_TYPE_INTEGER)
			{
				FloatBitMap_t &hdr_map=Envmap.face_maps[engine_cubemap_idx_to_fbm_idx[side]];
				hdr_map.Clear(0,0,0,1);
				// we are going to need to render multiple exposures
				float exposure=16.0;
				bool bOverExposedTexels=true;
				while( bOverExposedTexels && (exposure>0.05))
				{
					mat_force_tonemap_scale.SetValue(0.0f);
					pRenderContext->ResetToneMappingScale( exposure );
					g_ClientDLL->RenderView( view, nFlags, 0 );
					uint8 *pImage = new uint8[ screenBufSize * screenBufSize * 4 ];
					uint8 *pImage1 = new uint8[ tgaSize * tgaSize * 4 ];
					
					// Get Bits from the material system
					pRenderContext->ReadPixels( 0, 0, screenBufSize, screenBufSize,
												 pImage, IMAGE_FORMAT_RGBA8888 );

					ImageLoader::ResampleInfo_t info;
					info.m_pSrc = pImage;
					info.m_pDest = pImage1;
					info.m_nSrcWidth = screenBufSize;
					info.m_nSrcHeight = screenBufSize;
					info.m_nDestWidth = tgaSize;
					info.m_nDestHeight = tgaSize;
					info.m_flSrcGamma = 1.0f;
					info.m_flDestGamma = 1.0f;

					if( !ImageLoader::ResampleRGBA8888( info ) )
					{
						Sys_Error( "Can't resample\n" );
					}
					FloatBitMap_t ldr_map(tgaSize,tgaSize);
					for(int x1=0;x1<tgaSize;x1++)
						for(int y1=0;y1<tgaSize;y1++)
							for(int c=0;c<3;c++)
								ldr_map.Pixel(x1,y1,c)=pImage1[c+4*(x1+tgaSize*y1)]*(1/255.0);
					delete[] pImage;
					delete[] pImage1;
					ldr_map.RaiseToPower(2.2);				// gamma to linear
					float scale=1.0/exposure;
					bOverExposedTexels=false;
					for(int x=0;x<hdr_map.Width;x++)
						for(int y=0;y<hdr_map.Height;y++)
							for(int c=0;c<3;c++)
							{
								float texel=ldr_map.Pixel(x,y,c);
								if (texel>0.98)
									bOverExposedTexels=true;
								texel*=scale;
								hdr_map.Pixel(x,y,c)=max(hdr_map.Pixel(x,y,c),texel);
							}
					exposure*=0.75;
					materials->SwapBuffers();
				}
				Q_snprintf( name, sizeof( name ), "%s%s%s", pFileNameBase, facingName[side],pExtension );
//				hdr_map.WritePFM(name);
			}
			else
			{
				g_ClientDLL->RenderView( view, nFlags, 0 );
				Q_snprintf( name, sizeof( name ), "%s%s%s", pFileNameBase, facingName[side],pExtension );
				Assert( strlen( name ) < 1023 );
				videomode->TakeSnapshotTGARect( name, 0, 0, screenBufSize, screenBufSize, tgaSize, tgaSize, bPFM, face_idx[side]);
			}
		}
		if (g_pMaterialSystemHardwareConfig->GetHDRType() == HDR_TYPE_INTEGER)
		{
// 			FloatCubeMap_t OutEnvmap(tgaSize, tgaSize);
// 			for(int f=0;f<6;f++)
// 				OutEnvmap.face_maps[f].Clear(0,0,0,1);
// 			Envmap.Resample(OutEnvmap,15.0);
 			Q_snprintf( name, sizeof( name ), "%s", pFileNameBase);
 			Envmap.WritePFMs( name );
// 			Q_snprintf( name, sizeof( name ), "%s_filtered", pFileNameBase);
// 			OutEnvmap.WritePFMs( name );
		}

	}
	else
	{
		for(int side=0;side<6;side++)
		{
			view.angles[0] = angle0[side];
			view.angles[1] = angle1[side];
			view.angles[2] = 0;
			view.fov = 90;
			view.fovViewmodel = 90;
			view.origin = origin;
			
			
			g_ClientDLL->RenderView( view, nFlags, 0 );
			Q_snprintf( name, sizeof( name ), "%s%s%s", pFileNameBase, facingName[side],pExtension );
			Assert( strlen( name ) < 1023 );
			videomode->TakeSnapshotTGARect( name, 0, 0, screenBufSize, screenBufSize, tgaSize, tgaSize, bPFM, face_idx[side]);
		}
	}
		
	if( bPFM )
	{
		materials->SwapBuffers();
	}
	
	// HDRFIXME: push/pop
	if( bPFM )
	{
		pRenderContext->SetRenderTarget( pSaveRenderTarget );
	}
}


//-----------------------------------------------------------------------------
// Interface factory for VTex
//-----------------------------------------------------------------------------
void* CubemapsFSFactory( const char *pName, int *pReturnCode )
{
	if ( IsX360() )
		return NULL;

	if ( Q_stricmp( pName, FILESYSTEM_INTERFACE_VERSION ) == 0 )
		return g_pFileSystem;

	return NULL;
}


//-----------------------------------------------------------------------------
// Generates a cubemap .vtf from .TGA snapshots
//-----------------------------------------------------------------------------
static void BuildSingleCubemap( const char *pVTFName, const Vector &vecOrigin,
	int nSize, bool bHDR, const char *pGameDir, IVTex *ivt )
{
	if ( IsX360() )
		return;

	int nScreenBufSize = 4 * nSize;
	TakeCubemapSnapshot( vecOrigin, pVTFName, nScreenBufSize, nSize, bHDR );

	char pTXTName[ MAX_PATH ];
	Q_strncpy( pTXTName, pVTFName, sizeof(pTXTName) );
	Q_SetExtension( pTXTName, ".txt", sizeof(pTXTName) );

	// HDRFIXME: Make this go to a buffer instead.
	FileHandle_t fp = g_pFileSystem->Open( pTXTName, "w" );
	if( bHDR )
	{
		g_pFileSystem->FPrintf( fp, "\"pfm\" \"1\"\n" );
		// HDRFIXME: Make sure that we can mip and lod and get rid of this.
	}
	// don't let any dest alpha creep into the image
	g_pFileSystem->FPrintf( fp, "\"stripalphachannel\" \"1\"\n" );
	g_pFileSystem->Close( fp );

	if ( ivt )
	{
		char *argv[64];
		int iArg = 0;
		argv[iArg++] = "";
		argv[iArg++] = "-quiet";
		argv[iArg++] = "-UseStandardError";	// These are only here for the -currently released- version of vtex.dll.
		argv[iArg++] = "-WarningsAsErrors";
		argv[iArg++] = pTXTName;
		ivt->VTex( CubemapsFSFactory, pGameDir, iArg, argv );
	}

	g_pFileSystem->RemoveFile( pTXTName, NULL );

	const char *pSrcExtension = bHDR ? ".pfm" : ".tga";
	for( int i = 0; i < 6; i++ )
	{
		char pTempName[MAX_PATH];
		Q_snprintf( pTempName, sizeof( pTempName ), "%s%s", pVTFName, facingName[i] );
		Q_SetExtension( pTempName, pSrcExtension, sizeof(pTempName) );
		g_pFileSystem->RemoveFile( pTempName, NULL );
	}
}


#if !defined( SWDS )

//-----------------------------------------------------------------------------
// Grab six views for environment mapping tests
//-----------------------------------------------------------------------------
CON_COMMAND( envmap, "" )
{
	if ( IsX360() )
		return;

	char	base[ 256 ];
	IClientEntity *world = entitylist->GetClientEntity( 0 );

	if( world && world->GetModel() )
	{
		Q_FileBase( modelloader->GetName( ( model_t *)world->GetModel() ), base, sizeof( base ) );
	}
	else
	{
		Q_strncpy( base, "Env", sizeof( base ) );
	}

	int strLen = strlen( base ) + strlen( "cubemap_screenshots/" ) + 1;
	char *str = ( char * )_alloca( strLen );
	Q_snprintf( str, strLen, "cubemap_screenshots/%s", base );
	g_pFileSystem->CreateDirHierarchy( "cubemap_screenshots", "DEFAULT_WRITE_PATH" );

	TakeCubemapSnapshot( MainViewOrigin(), str, mat_envmapsize.GetInt(), mat_envmaptgasize.GetInt(), 
		g_pMaterialSystemHardwareConfig->GetHDRType() != HDR_TYPE_NONE );
}


//-----------------------------------------------------------------------------
// Write lighting information to a DMX file
//-----------------------------------------------------------------------------
static void WriteLightProbe( const char *pBasePath, const LightingState_t& state, bool bHDR )
{
	char pFullPath[MAX_PATH];
	Q_strncpy( pFullPath, pBasePath, sizeof(pFullPath) );
	Q_SetExtension( pFullPath, ".prb", sizeof(pFullPath) );

	DECLARE_DMX_CONTEXT();
	CDmxElement *pLightProbe = CreateDmxElement( "DmeElement" );

	const char *pCubemap = pBasePath + Q_strlen( "materials/" );
	CDmxElementModifyScope modify( pLightProbe );
	pLightProbe->SetValue( "name", "lightprobe" );
	pLightProbe->SetValue( "cubemap", pCubemap );

	if ( bHDR )
	{
		char pTemp[MAX_PATH];
		Q_snprintf( pTemp, sizeof(pTemp), "%s_hdr", pCubemap );
		pLightProbe->SetValue( "cubemapHdr", pTemp );
	}

	CDmxAttribute *pAmbientCube = pLightProbe->AddAttribute( "ambientCube" );
	CUtlVector< Vector >& vec = pAmbientCube->GetArrayForEdit<Vector>();
	for ( int i = 0; i < 6 ; ++i )
	{
		vec.AddToTail( state.r_boxcolor[i] );
	}

	CDmxAttribute *pLocalLightList = pLightProbe->AddAttribute( "localLights" );
	CUtlVector< CDmxElement* >& lights = pLocalLightList->GetArrayForEdit<CDmxElement*>();

	modify.Release();

	for ( int i = 0; i < state.numlights; ++i )
	{
		CDmxElement* pLight = CreateDmxElement( "DmeElement" );
		lights.AddToTail( pLight );

		const dworldlight_t &wl = *state.locallight[i];

		pLight->SetValue( "color", wl.intensity );
		switch( wl.type )
		{
		case emit_point:
			pLight->SetValue( "name", "Point" );
			pLight->SetValue( "origin", wl.origin );
			pLight->SetValue( "attenuation", Vector( wl.constant_attn, wl.linear_attn, wl.quadratic_attn ) );
			pLight->SetValue( "maxDistance", wl.radius );
			break;

		case emit_spotlight:
			pLight->SetValue( "name", "Spot" );
			pLight->SetValue( "origin", wl.origin );
			pLight->SetValue( "direction", wl.normal );
			pLight->SetValue( "attenuation", Vector( wl.constant_attn, wl.linear_attn, wl.quadratic_attn ) );
			pLight->SetValue( "theta", 2.0f * acos( wl.stopdot ) );
			pLight->SetValue( "phi", 2.0f * acos( wl.stopdot2 ) );
			pLight->SetValue( "exponent", wl.exponent ? wl.exponent : 1.0f );
			pLight->SetValue( "maxDistance", wl.radius );
			break;

		case emit_surface:
			pLight->SetValue( "name", "Spot" );
			pLight->SetValue( "origin", wl.origin );
			pLight->SetValue( "direction", wl.normal );
			pLight->SetValue( "attenuation", Vector( 0.0f, 0.0f, 1.0f ) );
			pLight->SetValue( "theta", 0.0f );
			pLight->SetValue( "phi", 0.0f );
			pLight->SetValue( "exponent", 1.0f );
			pLight->SetValue( "maxDistance", wl.radius );
			break;

		case emit_skylight:
			pLight->SetValue( "name", "Directional" );
			pLight->SetValue( "direction", wl.normal );
			break;
		}
	}

	CUtlBuffer buf( 0, 0, CUtlBuffer::TEXT_BUFFER );
	if ( SerializeDMX( buf, pLightProbe, pFullPath ) )
	{
		g_pFullFileSystem->WriteFile( pFullPath, "MOD", buf );
	}

	CleanupDMX( pLightProbe );
}


//-----------------------------------------------------------------------------
// Grab an envmap @ the view position + write lighting information
//-----------------------------------------------------------------------------
CON_COMMAND( lightprobe, 
	"Samples the lighting environment.\n"
	"Creates a cubemap and a file indicating the local lighting in a subdirectory called 'materials/lightprobes'\n."
	"The lightprobe command requires you specify a base file name.\n" )
{
	if ( IsX360() )
		return;

	if ( args.ArgC() < 2 ) 
	{
		ConMsg( "sample_lighting usage: lightprobe <base file name> [cubemap dimension]\n" );
		return;
	}

	int nTGASize = mat_envmaptgasize.GetInt();
	if ( args.ArgC() >= 3 )
	{
		nTGASize = atoi( args[2] );
	}

	CSysModule *pModule;
	IVTex *pIVTex = VTex_Load( &pModule );
	if ( !pIVTex )
		return;

	char pBasePath[MAX_PATH];
	Q_snprintf( pBasePath, sizeof(pBasePath), "materials/lightprobes/%s", args[1] );
	Q_StripFilename( pBasePath );
	g_pFileSystem->CreateDirHierarchy( pBasePath, "DEFAULT_WRITE_PATH" );

	char pTemp[MAX_PATH];
	char pMaterialSrcPath[MAX_PATH];
	Q_snprintf( pTemp, sizeof(pTemp), "materialsrc/lightprobes/%s", args[1] );
	GetModContentSubdirectory( pTemp, pMaterialSrcPath, sizeof(pMaterialSrcPath) );
	Q_StripFilename( pMaterialSrcPath );
	g_pFileSystem->CreateDirHierarchy( pMaterialSrcPath, NULL );

	char pGameDir[MAX_OSPATH];
	COM_GetGameDir( pGameDir, sizeof( pGameDir ) );

	bool bHDR = g_pMaterialSystemHardwareConfig->GetHDRType() != HDR_TYPE_NONE;
	if ( bHDR )
	{
		char pTemp2[MAX_PATH];
		Q_snprintf( pTemp2, sizeof(pTemp2), "materialsrc/lightprobes/%s_hdr", args[1] );

		GetModContentSubdirectory( pTemp2, pMaterialSrcPath, sizeof(pMaterialSrcPath) );
		BuildSingleCubemap( pMaterialSrcPath, MainViewOrigin(), nTGASize, true, pGameDir, pIVTex );
	}

	GetModContentSubdirectory( pTemp, pMaterialSrcPath, sizeof(pMaterialSrcPath) );
	BuildSingleCubemap( pMaterialSrcPath, MainViewOrigin(), nTGASize, false, pGameDir, pIVTex );

	VTex_Unload( pModule );

	// Get the lighting at the point
	LightingState_t lightingState;
	LightcacheGetDynamic_Stats stats;
	LightcacheGetDynamic( MainViewOrigin(), lightingState, stats );

	Q_snprintf( pBasePath, sizeof(pBasePath), "materials/lightprobes/%s", args[1] );
	WriteLightProbe( pBasePath, lightingState, bHDR );
}


static bool LoadSrcVTFFiles( IVTFTexture *pSrcVTFTextures[6], const char *pSkyboxBaseName )
{
	if ( IsX360() )
		return false;

	int i;
	for( i = 0; i < 6; i++ )
	{
		// !!! FIXME: This needs to open the vmt (or some other method) to find the correct LDR or HDR set of skybox textures! Look in vbsp\cubemap.cpp!
		char srcVTFFileName[1024];
		Q_snprintf( srcVTFFileName, sizeof( srcVTFFileName ), "materials/skybox/%s%s.vtf", pSkyboxBaseName, facingName[i] );

		CUtlBuffer buf;
		if ( !g_pFileSystem->ReadFile( srcVTFFileName, NULL, buf ) )
			return false;

		pSrcVTFTextures[i] = CreateVTFTexture();
		if (!pSrcVTFTextures[i]->Unserialize(buf))
		{
			Warning("*** Error unserializing skybox texture: %s\n", pSkyboxBaseName );
			return false;
		}

		// NOTE: texture[0] is a side texture that could be 1/2 height, so allow this and also allow 4x4 faces
		if ( ( ( pSrcVTFTextures[i]->Width() != pSrcVTFTextures[0]->Width() ) && ( pSrcVTFTextures[i]->Width() != 4 ) ) ||
			 ( ( pSrcVTFTextures[i]->Height() != pSrcVTFTextures[0]->Height() ) && ( pSrcVTFTextures[i]->Height() != pSrcVTFTextures[0]->Height()*2 )  && ( pSrcVTFTextures[i]->Height() != 4 ) ) ||
			 ( pSrcVTFTextures[i]->Flags() != pSrcVTFTextures[0]->Flags() ) )
		{
			Warning("*** Error: Skybox vtf files for %s weren't compiled with the same size texture and/or same flags!\n", pSkyboxBaseName );
			return false;
		}
	}

	return true;
}

#define DEFAULT_CUBEMAP_SIZE 32

void Cubemap_CreateDefaultCubemap( const char *pMapName, IBSPPack *iBSPPack )
{
	if ( IsX360() )
		return;

	// NOTE: This implementation depends on the fact that all VTF files contain
	// all mipmap levels
	ConVarRef skyboxBaseNameConVar( "sv_skyname" );

	IVTFTexture *pSrcVTFTextures[6];

	if ( !skyboxBaseNameConVar.IsValid() || !skyboxBaseNameConVar.GetString() )
	{
		Warning( "Couldn't create default cubemap\n" );
		return;
	}

	const char *pSkyboxBaseName = skyboxBaseNameConVar.GetString();

	if( !LoadSrcVTFFiles( pSrcVTFTextures, pSkyboxBaseName ) )
	{
		Warning( "Can't load skybox file %s to build the default cubemap!\n", pSkyboxBaseName );
		return;
	}
	Msg( "Creating default cubemaps for env_cubemap using skybox %s...\n", pSkyboxBaseName );
			
	// Figure out the mip differences between the two textures
	int iMipLevelOffset = 0;
	int tmp = pSrcVTFTextures[0]->Width();
	while( tmp > DEFAULT_CUBEMAP_SIZE )
	{
		iMipLevelOffset++;
		tmp >>= 1;
	}

	// Create the destination cubemap
	IVTFTexture *pDstCubemap = CreateVTFTexture();
	pDstCubemap->Init( DEFAULT_CUBEMAP_SIZE, DEFAULT_CUBEMAP_SIZE, 1,
		pSrcVTFTextures[0]->Format(), pSrcVTFTextures[0]->Flags() | TEXTUREFLAGS_ENVMAP, 
		pSrcVTFTextures[0]->FrameCount() );

	// First iterate over all frames
	for (int iFrame = 0; iFrame < pDstCubemap->FrameCount(); ++iFrame)
	{
		// Next iterate over all normal cube faces (we know there's 6 cause it's an envmap)
		for (int iFace = 0; iFace < 6; ++iFace )
		{
			// Finally, iterate over all mip levels in the *destination*
			for (int iMip = 0; iMip < pDstCubemap->MipCount(); ++iMip )
			{
				// Copy the bits from the source images into the cube faces
				unsigned char *pSrcBits = pSrcVTFTextures[iFace]->ImageData( iFrame, 0, iMip + iMipLevelOffset );
				unsigned char *pDstBits = pDstCubemap->ImageData( iFrame, iFace, iMip );
				int iSize = pDstCubemap->ComputeMipSize( iMip );
				int iSrcMipSize = pSrcVTFTextures[iFace]->ComputeMipSize( iMip + iMipLevelOffset );

				// !!! FIXME: Set this to black until the LDR/HDR issues are fixed on line ~563 in this file
				memset( pDstBits, 0, iSize );
				continue;

				if ( ( pSrcVTFTextures[iFace]->Width() == 4 ) && ( pSrcVTFTextures[iFace]->Height() == 4 ) ) // If texture is 4x4 square
				{
					// Force mip level 2 to get the 1x1 face
					pSrcBits = pSrcVTFTextures[iFace]->ImageData( iFrame, 0, 2 );
					iSrcMipSize = pSrcVTFTextures[iFace]->ComputeMipSize( 2 );

					// Replicate 1x1 mip level across entire face
					//memset( pDstBits, 0, iSize ); 
					for ( int i = 0; i < ( iSize / iSrcMipSize ); i++ )
					{
						memcpy( pDstBits + ( i * iSrcMipSize ), pSrcBits, iSrcMipSize ); 
					}
				}
				else if ( pSrcVTFTextures[iFace]->Width() == pSrcVTFTextures[iFace]->Height() ) // If texture is square
				{
					if ( iSrcMipSize != iSize )
					{
						Warning( "%s - ERROR! Cannot copy square face for default cubemap! iSrcMipSize(%d) != iSize(%d)\n", pSkyboxBaseName, iSrcMipSize, iSize );
						memset( pDstBits, 0, iSize );
					}
					else
					{
						// Just copy the mip level
						memcpy( pDstBits, pSrcBits, iSize ); 
					}
				}
				else if ( pSrcVTFTextures[iFace]->Width() == pSrcVTFTextures[iFace]->Height()*2 ) // If texture is rectangle 2x wide
				{
					int iMipWidth, iMipHeight, iMipDepth;
					pDstCubemap->ComputeMipLevelDimensions( iMip, &iMipWidth, &iMipHeight, &iMipDepth );
					if ( ( iMipHeight > 1 ) && ( iSrcMipSize*2 != iSize ) )
					{
						Warning( "%s - ERROR building default cube map! %d*2 != %d\n", pSkyboxBaseName, iSrcMipSize, iSize );
						memset( pDstBits, 0, iSize );
					}
					else
					{
						// Copy row at a time and repeat last row
						memcpy( pDstBits, pSrcBits, iSize/2 ); 
						//memcpy( pDstBits + iSize/2, pSrcBits, iSize/2 );
						int nSrcRowSize = pSrcVTFTextures[iFace]->RowSizeInBytes( iMip + iMipLevelOffset );
						int nDstRowSize = pDstCubemap->RowSizeInBytes( iMip );
						if ( nSrcRowSize != nDstRowSize )
						{
							Warning( "%s - ERROR building default cube map! nSrcRowSize(%d) != nDstRowSize(%d)!\n", pSkyboxBaseName, nSrcRowSize, nDstRowSize );
							memset( pDstBits, 0, iSize );
						}
						else
						{
							for ( int i = 0; i < ( iSize/2 / nSrcRowSize ); i++ )
							{
								memcpy( pDstBits + iSize/2 + i*nSrcRowSize, pSrcBits + iSrcMipSize - nSrcRowSize, nSrcRowSize );
							}
						}
					}
				}
				else
				{
					// ERROR! This code only supports square and rectangluar 2x wide
					Warning( "%s - Couldn't create default cubemap because texture res is %dx%d\n", pSkyboxBaseName, pSrcVTFTextures[iFace]->Width(), pSrcVTFTextures[iFace]->Height() );
					memset( pDstBits, 0, iSize );
					return;
				}
			}
		}
	}

	int flagUnion = 0;
	int i;
	for( i = 0; i < 6; i++ )
	{
		flagUnion |= pSrcVTFTextures[i]->Flags();
	}
	bool bHasAlpha = 
		( ( flagUnion & ( TEXTUREFLAGS_ONEBITALPHA | TEXTUREFLAGS_EIGHTBITALPHA ) ) != 0 );
	
	// Convert the cube to format that we can apply tools to it...
//	ImageFormat originalFormat = pDstCubemap->Format();
	pDstCubemap->ConvertImageFormat( IMAGE_FORMAT_DEFAULT, false );

	if( !bHasAlpha )
	{
		// set alpha to zero since the source doesn't have any alpha in it
		unsigned char *pImageData = pDstCubemap->ImageData();
		int size = pDstCubemap->ComputeTotalSize(); // in bytes!
		unsigned char *pEnd = pImageData + size;
		for( ; pImageData < pEnd; pImageData += 4 )
		{
			pImageData[3] = ( unsigned char )0;
		}
	}

	// Fixup the cubemap facing
	pDstCubemap->FixCubemapFaceOrientation();

	// Now that the bits are in place, compute the spheremaps...
	pDstCubemap->GenerateSpheremap();

	// Convert the cubemap to the final format
	pDstCubemap->ConvertImageFormat( IMAGE_FORMAT_DXT5, false );

	// Write the puppy out!
	char dstVTFFileName[1024];
	Q_snprintf( dstVTFFileName, sizeof( dstVTFFileName ), "materials/maps/%s/cubemapdefault.vtf", pMapName );

	CUtlBuffer outputBuf;
	if (!pDstCubemap->Serialize( outputBuf ))
	{
		Warning( "Error serializing default cubemap %s\n", dstVTFFileName );
		return;
	}

	// spit out the default one.
	iBSPPack->AddBufferToPack( dstVTFFileName, outputBuf.Base(), outputBuf.TellPut(), false );

	// Clean up the textures
	for( i = 0; i < 6; i++ )
	{
		DestroyVTFTexture( pSrcVTFTextures[i] );
	}
	DestroyVTFTexture( pDstCubemap );
}

static void AddSampleToBSPFile( bool bHDR, mcubemapsample_t *pSample, const char *matDir, IBSPPack *iBSPPack )
{
	if ( IsX360() )
		return;

	char textureName[MAX_PATH] = { 0 };
	const char *pHDRExtension = "";
	if( bHDR )
	{
		pHDRExtension = ".hdr";
	}
	Q_snprintf( textureName, sizeof( textureName ), "%s/c%d_%d_%d%s.vtf", matDir, ( int )pSample->origin[0],
	            ( int )pSample->origin[1], ( int )pSample->origin[2], pHDRExtension );
	char localPath[MAX_PATH] = { 0 };
	if ( !g_pFileSystem->RelativePathToFullPath_safe( textureName, "DEFAULT_WRITE_PATH", localPath ) || !*localPath )
	{
		Warning("vtex failed to compile cubemap!\n");
	}
	else
	{
		Q_FixSlashes( localPath );
		iBSPPack->AddFileToPack( textureName, localPath );
	}
	g_pFileSystem->RemoveFile( textureName, "DEFAULT_WRITE_PATH" );
}


/*
===============
R_BuildCubemapSamples

Take a cubemap at each "cubemap" entity in the current map.
===============
*/
// HOLY CRAP THIS NEEDS TO BE CLEANED UP

//Added these to seperate from R_BuildCubemapSamples to a) clean it up abit and b) fix the issue where if it fails, mouse is disabled.
static bool saveShadows = true;
static bool bDrawWater = true;
static int nSaveLightStyle = -1;
static int bSaveDrawBeams = true;
static bool bSaveMatSpecular = true;
static int nOldOcclusionVal = 1;
static int nOldBloomDisable = 0;
static int originaldrawMRMModelsVal = 1; 
void R_BuildCubemapSamples_PreBuild()
{
	// disable the mouse so that it won't be recentered all the bloody time.
	ConVarRef cl_mouseenable( "cl_mouseenable" );
	if( cl_mouseenable.IsValid() )
	{
		cl_mouseenable.SetValue( 0 );
	}
	
	ConVarRef r_shadows( "r_shadows" );
	saveShadows = true;
	if ( r_shadows.IsValid() )
	{
		saveShadows = r_shadows.GetBool();
		r_shadows.SetValue( 0 );
	}
	// Clear the water surface.
	ConVarRef mat_drawwater( "mat_drawwater" );
	bDrawWater = true;
	if ( mat_drawwater.IsValid() )
	{
		bDrawWater = mat_drawwater.GetBool();
		mat_drawwater.SetValue( 0 );
	} 
	nSaveLightStyle = -1;
	ConVarRef r_lightstyleRef( "r_lightstyle" );
	if ( r_lightstyleRef.IsValid() )
	{
		nSaveLightStyle = r_lightstyleRef.GetInt();
		r_lightstyleRef.SetValue( 0 );
		R_RedownloadAllLightmaps();
	}

	bSaveDrawBeams = r_DrawBeams.GetInt();
	r_DrawBeams.SetValue( 0 );

	bSaveMatSpecular = mat_fastspecular.GetBool();

//	ConVar *r_drawtranslucentworld = ( ConVar * )cv->FindVar( "r_drawtranslucentworld" );
//	ConVar *r_drawtranslucentrenderables = ( ConVar * )cv->FindVar( "r_drawtranslucentrenderables" );

//	bool bSaveDrawTranslucentWorld = true;
//	bool bSaveDrawTranslucentRenderables = true;
//	if( r_drawtranslucentworld )
//	{
//		bSaveDrawTranslucentWorld = r_drawtranslucentworld->GetBool();
		// NOTE! : We use to set this to 0 for HDR.
		//		r_drawtranslucentworld->SetValue( 0 );
//	}
//	if( r_drawtranslucentrenderables )
//	{
//		bSaveDrawTranslucentRenderables = r_drawtranslucentrenderables->GetBool();
		// NOTE! : We use to set this to 0 for HDR.
//		r_drawtranslucentrenderables->SetValue( 0 );
//	}

	building_cubemaps.SetValue( 1 );
	
	ConVarRef r_portalsopenall( "r_portalsopenall" );
	if( r_portalsopenall.IsValid() )
	{
		r_portalsopenall.SetValue( 1 );
	}

	nOldOcclusionVal = 1;
	ConVarRef r_occlusion( "r_occlusion" );
	if( r_occlusion.IsValid() )
	{
		nOldOcclusionVal = r_occlusion.GetInt();
		r_occlusion.SetValue( 0 );
	}
	
	ConVarRef mat_disable_bloom( "mat_disable_bloom" );
	nOldBloomDisable = 0;
	if ( mat_disable_bloom.IsValid() )
	{
		nOldBloomDisable = mat_disable_bloom.GetInt();
		mat_disable_bloom.SetValue( 1 );
	}
	ConVarRef drawMRMModelsCVar( "r_drawothermodels" );
	if( drawMRMModelsCVar.IsValid() )
		originaldrawMRMModelsVal = drawMRMModelsCVar.GetInt();


}
void R_BuildCubemapSamples_PostBuild()
{
	// re-enable the mouse.
	ConVarRef cl_mouseenable( "cl_mouseenable" );
	if( cl_mouseenable.IsValid() )
	{
		cl_mouseenable.SetValue( 1 );
	}
	ConVarRef r_shadows( "r_shadows" );
	if( r_shadows.IsValid() )
	{
		r_shadows.SetValue( saveShadows );
	}
	ConVarRef mat_drawwater( "mat_drawwater" );
	if ( mat_drawwater.IsValid() )
	{
		mat_drawwater.SetValue( bDrawWater );
	}
	if( bSaveMatSpecular )
	{
		mat_fastspecular.SetValue( "1" );
	}
	else
	{
		mat_fastspecular.SetValue( "0" );
	}

	ConVarRef r_lightstyleRef( "r_lightstyle" );
	if( r_lightstyleRef.IsValid() )
	{
		r_lightstyleRef.SetValue( nSaveLightStyle );
		R_RedownloadAllLightmaps();
	}

	ConVarRef r_portalsopenall( "r_portalsopenall" );
	if( r_portalsopenall.IsValid() )
	{
		r_portalsopenall.SetValue( 0 );
	}
	ConVarRef r_occlusion( "r_occlusion" );
	if( r_occlusion.IsValid() )
	{
		r_occlusion.SetValue( nOldOcclusionVal );
	}
	ConVarRef mat_disable_bloom( "mat_disable_bloom" );
	if ( mat_disable_bloom.IsValid() )
	{
		mat_disable_bloom.SetValue( nOldBloomDisable);
	}

	r_DrawBeams.SetValue( bSaveDrawBeams );
	
	ConVarRef drawMRMModelsCVar( "r_drawothermodels" );
	if( drawMRMModelsCVar.IsValid() )
	{ 
		drawMRMModelsCVar.SetValue( originaldrawMRMModelsVal );
	}
	building_cubemaps.SetValue( 0 );

}
void R_BuildCubemapSamples( int numIterations )
{
	if ( IsX360() )
		return;

	// Make sure that the file is writable before building cubemaps.
	Assert( g_pFileSystem->FileExists( cl.m_szLevelFileName, "GAME" ) );
	if( !g_pFileSystem->IsFileWritable( cl.m_szLevelFileName, "GAME" ) )
	{
		Warning( "%s is not writable!!!  Check it out before running buildcubemaps.\n", cl.m_szLevelFileName );
		return;
	}

	R_BuildCubemapSamples_PreBuild();

	int bounce;
	for( bounce = 0; bounce < numIterations; bounce++ )
	{
		if( bounce == 0 )
		{
			mat_fastspecular.SetValue( "0" );
		}
		else
		{
			mat_fastspecular.SetValue( "1" );
		}
		UpdateMaterialSystemConfig();

		IClientEntity *world = entitylist->GetClientEntity( 0 );

		if( !world || !world->GetModel() )
		{
			ConDMsg( "R_BuildCubemapSamples: No map loaded!\n" );
			R_BuildCubemapSamples_PostBuild(); 
			return;
		}

		int oldDrawMRMModelsVal = 1;
		ConVarRef drawMRMModelsCVar( "r_drawothermodels" );
		if( drawMRMModelsCVar.IsValid() )
		{
			oldDrawMRMModelsVal = drawMRMModelsCVar.GetInt();
			drawMRMModelsCVar.SetValue( 0 );
		}

		bool bOldLightSpritesActive = ActivateLightSprites( true );

		// load the vtex dll
		CSysModule *pModule;
		IVTex *ivt = VTex_Load( &pModule );
		if ( !ivt )
			return;

		char matDir[MAX_PATH];
		Q_snprintf( matDir, sizeof(matDir), "materials/maps/%s", cl.m_szLevelBaseName );
		g_pFileSystem->CreateDirHierarchy( matDir, "DEFAULT_WRITE_PATH" );

		char pTemp[MAX_PATH];
		Q_snprintf( pTemp, sizeof(pTemp), "materialsrc/maps/%s", cl.m_szLevelBaseName );

		char pMaterialSrcDir[MAX_PATH];
		GetModContentSubdirectory( pTemp, pMaterialSrcDir, sizeof(pMaterialSrcDir) );

		g_pFileSystem->CreateDirHierarchy( pMaterialSrcDir, NULL );

		char gameDir[MAX_OSPATH];
		COM_GetGameDir( gameDir, sizeof( gameDir ) );

		model_t *pWorldModel = ( model_t *)world->GetModel();
		int i;
		for( i = 0; i < pWorldModel->brush.pShared->m_nCubemapSamples; i++ )
		{
			mcubemapsample_t  *pCubemapSample = &pWorldModel->brush.pShared->m_pCubemapSamples[i];

			int tgaSize = ( pCubemapSample->size == 0 ) ? mat_envmaptgasize.GetInt() : 1 << ( pCubemapSample->size-1 );
			int screenBufSize = 4 * tgaSize;
			if ( (screenBufSize > videomode->GetModeWidth()) || (screenBufSize > videomode->GetModeHeight()) )
			{
				Warning( "Cube map buffer size %d x %d is bigger than screen!\nRun at a higher resolution! or reduce your cubemap resolution (needs 4X)\n", screenBufSize, screenBufSize );
				// BUGBUG: We'll leak DLLs/handles if we break out here, but this should be infrequent.
				R_BuildCubemapSamples_PostBuild();
				return;
			}
		}

		bool bSupportsHDR = g_pMaterialSystemHardwareConfig->GetHDRType() != HDR_TYPE_NONE;

		for( i = 0; i < pWorldModel->brush.pShared->m_nCubemapSamples; i++ )
		{
			Warning( "bounce: %d/%d sample: %d/%d\n", bounce+1, numIterations, i+1, pWorldModel->brush.pShared->m_nCubemapSamples );
			mcubemapsample_t  *pCubemapSample = &pWorldModel->brush.pShared->m_pCubemapSamples[i];

			char pVTFName[ MAX_PATH ];
			Q_snprintf( pVTFName, sizeof( pVTFName ), "%s/c%d_%d_%d", pMaterialSrcDir, 
				( int )pCubemapSample->origin[0], ( int )pCubemapSample->origin[1],	
				( int )pCubemapSample->origin[2] );

			int nTgaSize = ( pCubemapSample->size == 0 ) ? mat_envmaptgasize.GetInt() : 1 << ( pCubemapSample->size-1 );
			BuildSingleCubemap( pVTFName, pCubemapSample->origin, nTgaSize, bSupportsHDR, gameDir, ivt );
		}

		ActivateLightSprites( bOldLightSpritesActive );

		VTex_Unload( pModule );

		// load the bsppack dll
		IBSPPack *iBSPPack = NULL;
		pModule = FileSystem_LoadModule( "bsppack" );
		if ( pModule )
		{
			CreateInterfaceFn factory = Sys_GetFactory( pModule );
			if ( factory )
			{
				iBSPPack = ( IBSPPack * )factory( IBSPPACK_VERSION_STRING, NULL );
			}
		}
		if( !iBSPPack )
		{
			ConMsg( "Can't load bsppack.dll\n" );
			R_BuildCubemapSamples_PostBuild();
			return;
		}

		iBSPPack->SetHDRMode( g_pMaterialSystemHardwareConfig->GetHDRType() != HDR_TYPE_NONE );

		iBSPPack->LoadBSPFile( g_pFileSystem, cl.m_szLevelFileName );

		// Cram the textures into the bsp.
		Q_snprintf( matDir, sizeof(matDir), "materials/maps/%s", cl.m_szLevelBaseName );
		for ( i=0 ; i < pWorldModel->brush.pShared->m_nCubemapSamples ; i++ )
		{
			mcubemapsample_t *pSample = &pWorldModel->brush.pShared->m_pCubemapSamples[i];
			AddSampleToBSPFile( bSupportsHDR, pSample, matDir, iBSPPack );
		}
		Cubemap_CreateDefaultCubemap( cl.m_szLevelBaseName, iBSPPack );

		// Resolve levelfilename to absolute to ensure we are writing the exact file we loaded and not preferentially to
		// DEFAULT_WRITE_PATH
		char szAbsFile[MAX_PATH] = { 0 };
		g_pFullFileSystem->RelativePathToFullPath( cl.m_szLevelFileName, NULL, szAbsFile, sizeof( szAbsFile ) );
		if ( !*szAbsFile )
		{
			ConMsg( "Failed to resolve absolute path of map: %s\n", cl.m_szLevelFileName );
			R_BuildCubemapSamples_PostBuild();
			return;
		}
		iBSPPack->WriteBSPFile( szAbsFile );
		iBSPPack->ClearPackFile();
		FileSystem_UnloadModule( pModule );

		Cbuf_AddText( "restart setpos\n" );
	}

	R_BuildCubemapSamples_PostBuild();

	UpdateMaterialSystemConfig();

	// after map reloads, run any state that had to wait for map to reload
	reload_materials.SetValue( 1 );
}

#if !defined( _X360 )
CON_COMMAND( buildcubemaps, "Rebuild cubemaps." )
{
	extern void V_RenderVGuiOnly();

	bool bAllow = Host_AllowQueuedMaterialSystem(false);

	// do this to force a frame to render so the material system syncs up to single thread mode
	V_RenderVGuiOnly();
	if ( args.ArgC() == 1 )
	{
		R_BuildCubemapSamples( 1 );
	}
	else if( args.ArgC() == 2 )
	{
		R_BuildCubemapSamples( atoi( args[ 1 ] ) );
	}
	else
	{
		ConMsg( "Usage: buildcubemaps [numBounces]\n" );
	}
	Host_AllowQueuedMaterialSystem(bAllow);
}
#endif // SWDS

#endif