THandle.cpp

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/****************************************************************************************/
/*  THandle.cpp                                                                         */
/*                                                                                      */
/*  Author: John Pollard                                                                */
/*  Description: THandle manager for D3DDrv                                             */
/*                                                                                      */
/*   02/25/2001 Wendell Buckner
/*    This texture pointer is no longer valid under directx 7.  Set it to TRUE so there is
/*    something there when  the code does assert checks.        
/*   05/28/2000 Wendell Buckner
/*    Running out of texture handles...
/*  The contents of this file are subject to the Genesis3D Public License               */
/*  Version 1.01 (the "License"); you may not use this file except in                   */
/*  compliance with the License. You may obtain a copy of the License at                */
/*  http://www.genesis3d.com                                                            */
/*                                                                                      */
/*  Software distributed under the License is distributed on an "AS IS"                 */
/*  basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See                */
/*  the License for the specific language governing rights and limitations              */
/*  under the License.                                                                  */
/*                                                                                      */
/*  The Original Code is Genesis3D, released March 25, 1999.                            */
/*Genesis3D Version 1.1 released November 15, 1999                            */
/*  Copyright (C) 1999 WildTangent, Inc. All Rights Reserved           */
/*                                                                                      */
/****************************************************************************************/
#include <Windows.h>
#include <DDraw.h>
#include <D3D.h>

#include "THandle.h"
#include "BaseType.h"

/* 07/16/2000 Wendell Buckner
    Convert to Directx7...    
#include "D3DDrv.h"           */
#include "D3DDrv7x.h"

#include "DCommon.h"
#include "D3DCache.h"
#include "D3D_Main.h"
#include "PCache.h"
#include "D3d_FX.h"

#include "TPage.h"

//#define D3D_MANAGE_TEXTURES

//#define USE_ONE_CACHE

//05/28/2000 Wendell Buckner
//Running out of texture handles...
//#define MAX_TEXTURE_HANDLES                                   15000
  #define MAX_TEXTURE_HANDLES                                   32000

#define TEXTURE_CACHE_PERCENT                           0.75f
#define LMAP_CACHE_PERCENT                                      0.25f

#define TSTAGE_0                        0
#define TSTAGE_1                        1

//============================================================================================
//============================================================================================

geRDriver_THandle       TextureHandles[MAX_TEXTURE_HANDLES];

DDMemMgr                        *MemMgr;
DDMemMgr_Partition      *Partition[2];

D3DCache                        *TextureCache;
D3DCache                        *LMapCache;

TPage_Mgr                       *TPageMgr;

DDSURFACEDESC2          CurrentSurfDesc;

THandle_MipData         SystemToVideo[MAX_LMAP_LOG_SIZE];       

geBoolean                       CacheNeedsUpdate;
/*
#ifdef D3D_MANAGE_TEXTURES
        #define                 NUM_LMAP_VIDEO_SURFACES         10;
        THandle_MipData         SystemToVideo[MAX_LMAP_LOG_SIZE];       
#endif
*/

//============================================================================================
//============================================================================================

//============================================================================================
//      FreeAllcaches
//============================================================================================
void FreeAllCaches(void)
{
        if (LMapCache)
                D3DCache_Destroy(LMapCache);

        if (TextureCache)
                D3DCache_Destroy(TextureCache);

        LMapCache = NULL;
        TextureCache = NULL;

        if (Partition[1])
                DDMemMgr_PartitionDestroy(Partition[1]);
        if (Partition[0])
                DDMemMgr_PartitionDestroy(Partition[0]);
        if (MemMgr)
                DDMemMgr_Destroy(MemMgr);

        
#ifdef USE_TPAGES
        if (TPageMgr)
        {
                TPage_MgrDestroy(&TPageMgr);
                TPageMgr = NULL;
        }
#endif

        Partition[1] = NULL;
        Partition[0] = NULL;
        MemMgr = NULL;
}

//============================================================================================
//      FindTextureHandle
//============================================================================================
geRDriver_THandle *FindTextureHandle(void)
{
        int32                           i;
        geRDriver_THandle       *pHandle;

        pHandle = TextureHandles;

        for (i=0; i< MAX_TEXTURE_HANDLES; i++, pHandle++)
        {
                if (!pHandle->Active)
                {
                        memset(pHandle, 0, sizeof(geRDriver_THandle));
                        pHandle->Active = 1;
                        return pHandle;
                }
        }

        SetLastDrvError(DRV_ERROR_GENERIC, "D3D_FindTextureHandle:  No more handles left.\n");

        return NULL;
}

//============================================================================================
//      FreeAllTextureHandles
//============================================================================================
geBoolean FreeAllTextureHandles(void)
{
        int32                           i;
        geRDriver_THandle       *pHandle;

        pHandle = TextureHandles;

        for (i=0; i< MAX_TEXTURE_HANDLES; i++, pHandle++)
        {
                if (!pHandle->Active)
                        continue;

                if (!THandle_Destroy(pHandle))
                        return GE_FALSE;
        }

        return GE_TRUE;
}

//============================================================================================
//============================================================================================
geBoolean THandle_Startup(void)
{
        // Create the main memory manager
        MemMgr = DDMemMgr_Create(AppInfo.VidMemFree);

        if (!MemMgr)
                goto ExitWithError;

        // Create partition 0
        Partition[0] = DDMemMgr_PartitionCreate(MemMgr, (uint32)((float)DDMemMgr_GetFreeMem(MemMgr)*TEXTURE_CACHE_PERCENT));

        if (!Partition[0])
                goto ExitWithError;

        // Create partition 1
        Partition[1] = DDMemMgr_PartitionCreate(MemMgr, DDMemMgr_GetFreeMem(MemMgr));

        if (!Partition[1])
                goto ExitWithError;

        // Create the texture cache from partition 0
        TextureCache = D3DCache_Create("Main Texture Cache", AppInfo.lpDD, Partition[0], AppInfo.CanDoMultiTexture);

        if (!TextureCache)
                goto ExitWithError;

#ifndef USE_ONE_CACHE
        // Create the lmap cache from partition 1
        LMapCache = D3DCache_Create("Lightmap Cache", AppInfo.lpDD, Partition[1], AppInfo.CanDoMultiTexture);

        if (!LMapCache)
                goto ExitWithError;
#endif

        // Create all the system to video surfaces (for lmaps)
        if (!CreateSystemToVideoSurfaces())
                goto ExitWithError;

        #ifdef USE_TPAGES
                TPageMgr = TPage_MgrCreate(AppInfo.lpDD, &AppInfo.ddTexFormat, 512);
                if (!TPageMgr)
                        goto ExitWithError;
        #endif

        return GE_TRUE;

        ExitWithError:
        {
                THandle_Shutdown();
                return GE_FALSE;
        }
}

//============================================================================================
//============================================================================================
void THandle_Shutdown(void)
{
        FreeAllTextureHandles();
        FreeAllCaches();
        DestroySystemToVideoSurfaces();

        CacheNeedsUpdate = GE_FALSE;
}

//============================================================================================
//      Create3DTHandle
//============================================================================================
geRDriver_THandle *Create3DTHandle(geRDriver_THandle *THandle, int32 Width, int32 Height, int32 NumMipLevels, const geRDriver_PixelFormat *PixelFormat)
{
        int32                           Size, i;

        assert(NumMipLevels < THANDLE_MAX_MIP_LEVELS);
        assert(NumMipLevels <= 4);

        // Store width/height info
        THandle->Width = Width;
        THandle->Height = Height;
        THandle->NumMipLevels = (uint8)NumMipLevels;
        THandle->Log = (uint8)GetLog(Width, Height);
        THandle->Stride = (1<<THandle->Log);

        // Create the surfaces to hold all the mips
        THandle->MipData = (THandle_MipData*)malloc(sizeof(THandle_MipData)*NumMipLevels);
        memset(THandle->MipData, 0, sizeof(THandle_MipData)*NumMipLevels);
        
        if (!THandle->MipData)
        {
                THandle_Destroy(THandle);
                return NULL;
        }

        Size = 1<<THandle->Log;

        // Create all the surfaces for each mip level
        for (i=0; i< NumMipLevels; i++)
        {
                int32   Stage;

                if (!THandle_CreateSurfaces(&THandle->MipData[i], Size, Size, &CurrentSurfDesc, GE_FALSE, 0))
                {
                        THandle_Destroy(THandle);
                        return NULL;
                }

                // get a cache type for this surface since it is a 3d surface, and will need to be cached on the video card
                //THandle->MipData[i].CacheType = D3DCache_TypeCreate(TextureCache, Size, Size, NumMipLevels, &CurrentSurfDesc);
                // We can use 1 miplevel for the type, since we are createing types for each miplevel...
                if (AppInfo.CanDoMultiTexture)
                        Stage = TSTAGE_0;
                else
                        Stage = 0;

                THandle->MipData[i].CacheType = D3DCache_TypeCreate(TextureCache, Size, Size, 1, Stage, &CurrentSurfDesc);

                if (!THandle->MipData[i].CacheType)
                {
                        THandle_Destroy(THandle);
                        return NULL;
                }

                Size>>=1;
        }

        return THandle;
}

//============================================================================================
//      CreateLightmapTHandle
//============================================================================================
geRDriver_THandle *CreateLightmapTHandle(geRDriver_THandle *THandle, int32 Width, int32 Height, int32 NumMipLevels, const geRDriver_PixelFormat *PixelFormat)
{
        int32                           Size, Stage;

        assert(NumMipLevels < THANDLE_MAX_MIP_LEVELS);

        assert(NumMipLevels == 1);
        
        // Save some info about the lightmap
        THandle->Width = Width;
        THandle->Height = Height;
        THandle->NumMipLevels = (uint8)NumMipLevels;
        THandle->Log = (uint8)GetLog(Width, Height);
        THandle->Stride = 1<<THandle->Log;

        assert(THandle->Log < MAX_LMAP_LOG_SIZE);

        Size = 1<<THandle->Log;

        THandle->MipData = (THandle_MipData*)malloc(sizeof(THandle_MipData)*NumMipLevels);
        memset(THandle->MipData, 0, sizeof(THandle_MipData)*NumMipLevels);

        THandle->MipData[0].Flags = THANDLE_UPDATE;

#ifdef D3D_MANAGE_TEXTURES
        #ifndef USE_TPAGES
        {
                int32           Stage;

                if (AppInfo.CanDoMultiTexture)
                        Stage = STAGE_1;
                else
                        Stage = 0;

                if (!THandle_CreateSurfaces(&THandle->MipData[0], Size, Size, &CurrentSurfDesc, GE_FALSE, Stage))
                {
                        THandle_Destroy(THandle);
                        return NULL;
                }

/*   02/25/2001 Wendell Buckner
/*    This texture pointer is no longer valid under directx 7.  Set it to TRUE so there is
/*    something there when  the code does assert checks.        
                D3DSetTexture(0, THandle->MipData[0].Texture); */
                D3DSetTexture(0, THandle->MipData[0].Surface);          

        }
        #endif
#endif

        if (AppInfo.CanDoMultiTexture)
                Stage = TSTAGE_1;
        else
                Stage = 0;

#ifdef USE_ONE_CACHE
        THandle->MipData[0].CacheType = D3DCache_TypeCreate(TextureCache, Size, Size, NumMipLevels, Stage, &CurrentSurfDesc);
#else
        THandle->MipData[0].CacheType = D3DCache_TypeCreate(LMapCache, Size, Size, NumMipLevels, Stage, &CurrentSurfDesc);
#endif

        if (!THandle->MipData[0].CacheType)
        {
                THandle_Destroy(THandle);
                return NULL;
        }

        return THandle;
}

//============================================================================================
//      Create2DTHandle
//============================================================================================
geRDriver_THandle *Create2DTHandle(geRDriver_THandle *THandle, int32 Width, int32 Height, int32 NumMipLevels, const geRDriver_PixelFormat *PixelFormat)
{
        assert(NumMipLevels < THANDLE_MAX_MIP_LEVELS);
        assert(NumMipLevels == 1);

        // Save some info about the lightmap
        THandle->Width = Width;
        THandle->Height = Height;
        THandle->NumMipLevels = (uint8)NumMipLevels;
        THandle->Log = (uint8)GetLog(Width, Height);
        THandle->Stride = Width;

        // Create the surfaces to hold all the mips
        THandle->MipData = (THandle_MipData*)malloc(sizeof(THandle_MipData)*NumMipLevels);
        memset(THandle->MipData, 0, sizeof(THandle_MipData)*NumMipLevels);
        
        if (!THandle->MipData)
        {
                THandle_Destroy(THandle);
                return NULL;
        }
        
        if (!THandle_CreateSurfaces(&THandle->MipData[0], Width, Height, &CurrentSurfDesc, GE_TRUE, 0))
        {
                THandle_Destroy(THandle);
                return NULL;
        }

        return THandle;
}

//============================================================================================
//      SetupCurrent3dDesc
//============================================================================================
geBoolean SetupCurrent3dDesc(gePixelFormat PixelFormat)
{
        switch (PixelFormat)
        {
                case GE_PIXELFORMAT_16BIT_555_RGB:
                case GE_PIXELFORMAT_16BIT_565_RGB:
                {
                        memcpy(&CurrentSurfDesc, &AppInfo.ddTexFormat, sizeof(DDSURFACEDESC2));
                        break;
                }
                case GE_PIXELFORMAT_16BIT_4444_ARGB:
                {
                        memcpy(&CurrentSurfDesc, &AppInfo.ddFourBitAlphaSurfFormat, sizeof(DDSURFACEDESC2));
                        break;
                }
                case GE_PIXELFORMAT_16BIT_1555_ARGB:
                {
                        memcpy(&CurrentSurfDesc, &AppInfo.ddOneBitAlphaSurfFormat, sizeof(DDSURFACEDESC2));
                        break;
                }

                default:
                {
                        SetLastDrvError(DRV_ERROR_GENERIC, "SetupCurrent3dDesc:  Invalid pixel format.\n");
                        return GE_FALSE;
                }
        }

        return GE_TRUE;
}
//============================================================================================
//      THandle_Create
//============================================================================================
geRDriver_THandle *DRIVERCC THandle_Create(int32 Width, int32 Height, int32 NumMipLevels, const geRDriver_PixelFormat *PixelFormat)
{
        geRDriver_THandle       *THandle;

        THandle = FindTextureHandle();

        if (!THandle)
        {
                SetLastDrvError(DRV_ERROR_GENERIC, "D3DDRV:THandle_Create:  Out of texture handles.\n");
                return NULL;
        }

        THandle->PixelFormat = *PixelFormat;

        if (PixelFormat->Flags & RDRIVER_PF_3D)
        {
                // Get the pixel format desc for this thandle
                if (!SetupCurrent3dDesc(PixelFormat->PixelFormat))
                        return NULL;

                if (!Create3DTHandle(THandle, Width, Height, NumMipLevels, PixelFormat))
                        return NULL;

                CacheNeedsUpdate = GE_TRUE;
        }
        else if (PixelFormat->Flags & RDRIVER_PF_LIGHTMAP)
        {
                // Get the pixel format desc for this thandle
                if (!SetupCurrent3dDesc(PixelFormat->PixelFormat))
                        return NULL;

                if (!CreateLightmapTHandle(THandle, Width, Height, NumMipLevels, PixelFormat))
                        return NULL;

                CacheNeedsUpdate = GE_TRUE;
        }
        else if (PixelFormat->Flags & RDRIVER_PF_2D)
        {
                // 2d surfaces are always this format for now
                memcpy(&CurrentSurfDesc, &AppInfo.ddSurfFormat, sizeof(DDSURFACEDESC2));

                if (!Create2DTHandle(THandle, Width, Height, NumMipLevels, PixelFormat))
                        return NULL;
        }

        return THandle;
}

//============================================================================================
//      THandle_Destroy
//============================================================================================
geBoolean DRIVERCC THandle_Destroy(geRDriver_THandle *THandle)
{
        int32           i;

        assert(THandle);
        assert(THandle->Active);

        for (i=0; i< THandle->NumMipLevels; i++)
        {
                assert(THandle->MipData);

                if (THandle->MipData[i].CacheType)
                {
                        D3DCache_TypeDestroy(THandle->MipData[i].CacheType);
                        CacheNeedsUpdate = GE_TRUE;
                        THandle->MipData[i].CacheType = NULL;
                }
                
                if (THandle->MipData[i].Surface)
                {
                        assert(THandle->MipData[i].Texture);

                        THandle_DestroySurfaces(&THandle->MipData[i]);
                        THandle->MipData[i].Surface = NULL;
                        THandle->MipData[i].Texture = NULL;
                }
        }

        if (THandle->MipData)
                free(THandle->MipData);

        memset(THandle, 0, sizeof(geRDriver_THandle));

        return GE_TRUE;
}

//=====================================================================================
//=====================================================================================
geBoolean DRIVERCC THandle_Lock(geRDriver_THandle *THandle, int32 MipLevel, void **Bits)
{
    DDSURFACEDESC2              SurfDesc;
    HRESULT                             Result;

    assert(!(THandle->MipData[MipLevel].Flags & THANDLE_LOCKED));

        // Lock the surface so it can be filled with the data
    memset(&SurfDesc, 0, sizeof(DDSURFACEDESC2));
    SurfDesc.dwSize = sizeof(DDSURFACEDESC2);

/* 03/10/2002 Wendell Buckner
    Procedural Textures
    if you must lock a texture specify the flags WRITEONLY and DISCARDCONTENTS when 
    Result = THandle->MipData[MipLevel].Surface->Lock(NULL, &SurfDesc , DDLOCK_WAIT, NULL);*/
    Result = THandle->MipData[MipLevel].Surface->Lock(NULL, &SurfDesc , DDLOCK_WAIT | DDLOCK_WRITEONLY | DDLOCK_DISCARDCONTENTS, NULL);

    if (Result != DD_OK) 
        {
        return GE_FALSE;
    }

        THandle->MipData[MipLevel].Flags |= THANDLE_LOCKED;

        *Bits = (void*)SurfDesc.lpSurface;

        return GE_TRUE;
}

//=====================================================================================
//      THandle_UnLock
//=====================================================================================
geBoolean DRIVERCC THandle_UnLock(geRDriver_THandle *THandle, int32 MipLevel)
{
    HRESULT                             Result;

    assert(MipLevel <= THandle->NumMipLevels);
    assert(THandle->MipData[MipLevel].Flags & THANDLE_LOCKED);

        // Unlock the surface
    Result = THandle->MipData[MipLevel].Surface->Unlock(NULL);

    if (Result != DD_OK) 
        {
        return GE_FALSE;
    }

        THandle->MipData[MipLevel].Flags |= THANDLE_UPDATE;
        THandle->MipData[MipLevel].Flags &= ~THANDLE_LOCKED;

        return GE_TRUE;
}

#ifndef NDEBUG
#define DebugIf(a, b) if (a) b
#else
#define DebugIf(a, b)
#endif

//=====================================================================================
//      THandle_GetInfo
//=====================================================================================
geBoolean DRIVERCC THandle_GetInfo(geRDriver_THandle *THandle, int32 MipLevel, geRDriver_THandleInfo *Info)
{
        DebugIf (MipLevel > THandle->Log, return GE_FALSE);

        Info->Width = THandle->Width>>MipLevel;
        Info->Height = THandle->Height>>MipLevel;
        Info->Stride = THandle->Stride>>MipLevel;

        if (THandle->PixelFormat.Flags & RDRIVER_PF_CAN_DO_COLORKEY)
        {
                Info->Flags = RDRIVER_THANDLE_HAS_COLORKEY;
                Info->ColorKey = 1;
        }
        else
        {
                Info->Flags = 0;
                Info->ColorKey = 0;
        }

        Info->PixelFormat = THandle->PixelFormat;

        return GE_TRUE;
}

//=====================================================================================
//      CreateSystemToVideoSurfaces
//      System surfaces to copy from system to video
//=====================================================================================
geBoolean CreateSystemToVideoSurfaces(void)
{
        int32                           i;
        DDSURFACEDESC2          SurfDesc;

        memcpy(&SurfDesc, &AppInfo.ddTexFormat, sizeof(DDSURFACEDESC2));

        for (i=0; i<MAX_LMAP_LOG_SIZE; i++)
        {
                int32           Size;

                Size = 1<<i;
                
                if (!THandle_CreateSurfaces(&SystemToVideo[i], Size, Size, &SurfDesc, GE_FALSE, 1))
                {
                        DestroySystemToVideoSurfaces();
                        return GE_FALSE;
                }
        }

        return GE_TRUE;
}

//=====================================================================================
//      DestroySystemToVideoSurfaces
//=====================================================================================
void DestroySystemToVideoSurfaces(void)
{
        int32                           i;

        for (i=0; i<MAX_LMAP_LOG_SIZE; i++)
                THandle_DestroySurfaces(&SystemToVideo[i]);
}

//=====================================================================================
//      THandle_CreateSurfaces
//=====================================================================================
geBoolean THandle_CreateSurfaces(THandle_MipData *Surf, int32 Width, int32 Height, DDSURFACEDESC2 *SurfDesc, geBoolean ColorKey, int32 Stage)
{
/* 02/25/2001 Wendell Buckner
   This texture pointer is no longer valid under directx 7.  Set it to TRUE so there is
        LPDIRECTDRAWSURFACE4 Surface;*/
        LPDIRECTDRAWSURFACE7 Surface;

        DDSURFACEDESC2          ddsd;
        HRESULT                         Hr;
                        
        memcpy(&ddsd, SurfDesc, sizeof(DDSURFACEDESC2));

        ddsd.dwSize = sizeof(DDSURFACEDESC2);
        ddsd.dwFlags = DDSD_CAPS | DDSD_HEIGHT | DDSD_WIDTH | DDSD_PIXELFORMAT | DDSD_TEXTURESTAGE;

#ifdef D3D_MANAGE_TEXTURES
        ColorKey = GE_TRUE;                     // Force a colorkey on system surfaces since we are letting D3D do our cacheing...

        ddsd.ddsCaps.dwCaps = 0;
        ddsd.ddsCaps.dwCaps2 = DDSCAPS2_TEXTUREMANAGE | DDSCAPS2_HINTDYNAMIC;
#else
        ddsd.ddsCaps.dwCaps = DDSCAPS_SYSTEMMEMORY;
        ddsd.ddsCaps.dwCaps2 = 0;//DDSCAPS2_HINTDYNAMIC;
#endif

        ddsd.ddsCaps.dwCaps |= DDSCAPS_TEXTURE;
        ddsd.ddsCaps.dwCaps2 |= DDSCAPS2_HINTDYNAMIC;

        ddsd.ddsCaps.dwCaps3 = 0;
        ddsd.ddsCaps.dwCaps4 = 0;
        ddsd.dwWidth = Width;
        ddsd.dwHeight = Height;

        ddsd.dwTextureStage = Stage;
                        
        Hr = AppInfo.lpDD->CreateSurface(&ddsd, &Surface, NULL);

        if(Hr != DD_OK) 
        { 
                return FALSE;
        }

        Surf->Surface = Surface;
        
/* 02/25/2001 Wendell Buckner
   This texture pointer is no longer valid under directx 7.  Set it to TRUE so there is
   something there when  the code does assert checks.
        Surf->Texture = NULL; */
    Surf->Texture = Surface;

/* 02/25/2001 Wendell Buckner
   This texture pointer is no longer valid under directx 7.  Set it to TRUE so there is
   something there when  the code does assert checks.
        Hr = Surface->QueryInterface(IID_IDirect3DTexture2, (void**)&Surf->Texture);  

        if(Hr != DD_OK) 
        { 
                Surface->Release();
                return GE_FALSE;
        }*/

        if (ColorKey)
        {
                DDCOLORKEY                      CKey;
                
                // Create the color key for this surface
                CKey.dwColorSpaceLowValue = 1;
                CKey.dwColorSpaceHighValue = 1;
                
                if (Surf->Surface->SetColorKey(DDCKEY_SRCBLT , &CKey) != DD_OK)
                {
                        SetLastDrvError(DRV_ERROR_GENERIC, "THandle_CreateSurfaces: SetColorKey failed for texture.");
                        Surf->Surface->Release();
                        Surf->Surface = NULL;

/*   02/25/2001 Wendell Buckner
      This texture pointer is no longer valid under directx 7.  Set it to TRUE so there is
                        Surf->Texture->Release();*/
                        Surf->Texture = NULL;
                        
                        return FALSE;
                }
        }
        return GE_TRUE;         // All good dude
}

//=====================================================================================
//      DestroySystemSurface
//=====================================================================================
void THandle_DestroySurfaces(THandle_MipData *Surf)
{
/*   02/25/2001 Wendell Buckner
      This texture pointer is no longer valid under directx 7.  Set it to TRUE so there is
        if (Surf->Texture)
                Surf->Texture->Release();*/

        if (Surf->Surface)
                Surf->Surface->Release();

        memset(Surf, 0, sizeof (THandle_MipData));
}

//=====================================================================================
//      THandle_CheckCache
//=====================================================================================
geBoolean THandle_CheckCache(void)
{
        geRDriver_THandle       *pTHandle;
        int32                           i, Stage0, Stage1;
        int32                           MaxTable1[9], MaxTable2[9];

        if (!CacheNeedsUpdate)
                return GE_TRUE;

#ifndef D3D_MANAGE_TEXTURES             // If D3D is managing textures, then we don't ned to do any of this...
        D3DMain_Log("THandle_CheckCache:  Resetting texture cache...\n");

#ifdef USE_ONE_CACHE
                #pragma message ("There numbers ARE NOT DONE.  So if USE_ONE_CACHE is defined, please finish this...")
                // Texture cache & Lightmap cache (we are only using one cache, so the combine into the TextureCache)
                MaxTable1[0] = 256;                     //  1x1
                MaxTable1[1] = 256;                     //  2x2
                MaxTable1[2] = 256;                     //  4x4
                MaxTable1[3] = 512;                     //  8x8
                MaxTable1[4] = 512;                     // 16x16
                MaxTable1[5] = 512;                     // 32x32
                MaxTable1[6] = 512;                     // 64x64
                MaxTable1[7] = 256;                     //128x128
                MaxTable1[8] = 256;                     //256x256
#else
        if (AppInfo.DeviceIdentifier.dwVendorId == 4634)                // 3dfx series have a limit on the number of texture handles
        {
                D3DMain_Log("   3dfx card detected, using smaller number of handles...\n");

                // Texture cache
                MaxTable1[0] = 24;                      //  1x1
                MaxTable1[1] = 24;                      //  2x2
                MaxTable1[2] = 24;                      //  4x4
                MaxTable1[3] = 24;                      //  8x8
                MaxTable1[4] = 24;                      // 16x16
                MaxTable1[5] = 128;                     // 32x32
                MaxTable1[6] = 128;                     // 64x64
                MaxTable1[7] = 128;                     //128x128
                MaxTable1[8] = 128;                     //256x256

                // Lightmap cache
                MaxTable2[0] = 128;                     //  1x1
                MaxTable2[1] = 128;                     //  2x2
                MaxTable2[2] = 256;                     //  4x4
                MaxTable2[3] = 256;                     //  8x8
                MaxTable2[4] = 256;                     // 16x16
                MaxTable2[5] = 128;                     // 32x32
                MaxTable2[6] = 128;                     // 64x64
                MaxTable2[7] = 128;                     //128x128
                MaxTable2[8] = 128;                     //256x256
        }
        else
        {
                D3DMain_Log("   NO 3dfx card detected, using larger number of handles...\n");

                // Texture cache
                MaxTable1[0] = 32;                      //  1x1
                MaxTable1[1] = 32;                      //  2x2
                MaxTable1[2] = 32;                      //  4x4
                MaxTable1[3] = 32;                      //  8x8
                MaxTable1[4] = 32;                      // 16x16
                MaxTable1[5] = 32;                      // 32x32
                MaxTable1[6] = 128;                     // 64x64
                MaxTable1[7] = 128;                     //128x128
                MaxTable1[8] = 128;                     //256x256

                MaxTable2[0] = 128;                     //  1x1
                MaxTable2[1] = 128;                     //  2x2
                MaxTable2[2] = 256;                     //  4x4
                MaxTable2[3] = 1024;            //  8x8
                MaxTable2[4] = 1024;            // 16x16
                MaxTable2[5] = 512;                     // 32x32
                MaxTable2[6] = 256;                     // 64x64
                MaxTable2[7] = 256;                     //128x128
                MaxTable2[8] = 256;                     //256x256
        }
#endif

        if (AppInfo.CanDoMultiTexture)
        {
                Stage0 = TSTAGE_0;
                Stage1 = TSTAGE_1;
        }
        else
        {
                Stage0 = 0;                                                        
                Stage1 = 0;
        }

        #ifndef USE_ONE_CACHE
                if (!D3DCache_AdjustSlots(LMapCache, MaxTable2, GE_TRUE))
                {
                        D3DMain_Log("THandle_CheckCache:  D3DCache_AdjustSlots failed for LMapCache.\n");
                        return GE_FALSE;
                }
        #endif

        if (!D3DCache_AdjustSlots(TextureCache, MaxTable1, GE_FALSE))
        {
                D3DMain_Log("THandle_CheckCache:  D3DCache_AdjustSlots failed for TextureCache.\n");
                return GE_FALSE;
        }

#endif

        // Make sure no THandles reference any slots, because they mave have been moved around, or gotten destroyed...
        //  (Evict all textures in the cache)
        pTHandle = TextureHandles;

        for (i=0; i< MAX_TEXTURE_HANDLES; i++, pTHandle++)
        {
                int32           m;

                for (m=0; m< pTHandle->NumMipLevels; m++)
                {
                        pTHandle->MipData[m].Slot = NULL;
                }
        }

        CacheNeedsUpdate = GE_FALSE;

        return GE_TRUE;
}

---