windows-nt/Source/XPSP1/NT/multimedia/directx/dxg/d3d8/fw/fcache.cpp

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2020-09-26 03:20:57 -05:00
/*==========================================================================
*
* Copyright (C) 1999-2000 Microsoft Corporation. All Rights Reserved.
*
* File: enum.cpp
* Content Handles all of the file caching of device caps.
*
*
***************************************************************************/
#include "ddrawpr.h"
#include <stdio.h>
#include "d3dobj.hpp"
#include "enum.hpp"
#include "d3di.hpp"
#include "shlobj.h"
#define DXCACHEFILENAME "\\d3d8caps.dat"
#define DXTEMPFILENAME "\\d3d8caps.tmp"
typedef struct _FDEVICEHEADER
{
DWORD VendorId;
DWORD DeviceId;
DWORD SubSysId;
DWORD Revision;
DWORD FileOffset;
DWORD Size;
} FDEVICEHEADER;
HANDLE OpenCacheFile(DWORD dwDesiredAccess, DWORD dwCreationDisposition, char * pName, char * pPath)
{
char FName[MAX_PATH + 16];
GetSystemDirectory(FName, MAX_PATH);
lstrcat(FName, pName);
HANDLE h = CreateFile( FName,
dwDesiredAccess,
FILE_SHARE_READ,
NULL,
dwCreationDisposition,
FILE_ATTRIBUTE_NORMAL,
NULL);
#ifdef WINNT
if (INVALID_HANDLE_VALUE == h)
{
HMODULE hShlwapi=0;
typedef HRESULT (WINAPI * PSHGETSPECIALFOLDERPATH) (HWND, LPTSTR, int, BOOL);
PSHGETSPECIALFOLDERPATH pSHGetSpecialFolderPath=0;
hShlwapi = LoadLibrary("SHELL32.DLL");
if (hShlwapi)
{
pSHGetSpecialFolderPath = (PSHGETSPECIALFOLDERPATH) GetProcAddress(hShlwapi,"SHGetSpecialFolderPathA");
if(pSHGetSpecialFolderPath)
{
HRESULT hr = pSHGetSpecialFolderPath(
NULL,
FName,
CSIDL_LOCAL_APPDATA, // <user name>\Local Settings\Applicaiton Data (non roaming)
TRUE);
if (SUCCEEDED(hr))
{
lstrcat(FName, pName);
h = CreateFile( FName,
dwDesiredAccess,
FILE_SHARE_READ,
NULL,
dwCreationDisposition,
FILE_ATTRIBUTE_NORMAL,
NULL);
}
}
FreeLibrary(hShlwapi);
}
}
#endif
if (pPath)
{
lstrcpy(pPath, FName);
}
return h;
}
void ReadFromCache(D3DADAPTER_IDENTIFIER8* pDI,
UINT* pCapsSize,
BYTE** ppCaps)
{
HANDLE h;
DWORD HeaderSize;
DWORD NumRead;
FDEVICEHEADER* pHeaderInfo = NULL;
DWORD i;
// Get the data for the device that we're looking for
*pCapsSize = 0;
*ppCaps = NULL;
// Open the file and look for the device entry
h = OpenCacheFile (GENERIC_READ, OPEN_EXISTING, DXCACHEFILENAME, NULL);
if (h == INVALID_HANDLE_VALUE)
{
return;
}
ReadFile( h, &HeaderSize, sizeof(DWORD), &NumRead, NULL);
if (NumRead < sizeof(DWORD))
{
goto FileError;
}
pHeaderInfo = (FDEVICEHEADER*) MemAlloc(HeaderSize);
if (pHeaderInfo == NULL)
{
goto FileError;
}
ReadFile( h, pHeaderInfo, HeaderSize, &NumRead, NULL);
if (NumRead < HeaderSize)
{
goto FileError;
}
for (i = 0; i < HeaderSize / sizeof(FDEVICEHEADER); i++)
{
if ((pHeaderInfo[i].VendorId == pDI->VendorId) &&
(pHeaderInfo[i].DeviceId == pDI->DeviceId) &&
(pHeaderInfo[i].SubSysId == pDI->SubSysId) &&
(pHeaderInfo[i].Revision == pDI->Revision))
{
break;
}
}
if (i < HeaderSize / sizeof(FDEVICEHEADER))
{
// We have info for the device - now we read it
if (SetFilePointer (h, pHeaderInfo[i].FileOffset, NULL, FILE_BEGIN) !=
pHeaderInfo[i].FileOffset)
{
goto FileError;
}
*ppCaps = (BYTE*) MemAlloc(pHeaderInfo[i].Size);
if (*ppCaps == NULL)
{
goto FileError;
}
ReadFile( h, *ppCaps, pHeaderInfo[i].Size, &NumRead, NULL);
if (NumRead < pHeaderInfo[i].Size)
{
MemFree(*ppCaps);
*ppCaps = NULL;
goto FileError;
}
// If we got this far, then everything worked
*pCapsSize = pHeaderInfo[i].Size;
}
FileError:
if (pHeaderInfo != NULL)
{
MemFree(pHeaderInfo);
}
CloseHandle(h);
}
void WriteToCache(D3DADAPTER_IDENTIFIER8* pDI,
UINT CapsSize,
BYTE* pCaps)
{
char FName[MAX_PATH + 16];
char NewFName[MAX_PATH + 16];
BOOL bNewFile = FALSE;
HANDLE hOld;
HANDLE hNew;
DWORD NewHeaderSize;
DWORD OldHeaderSize;
DWORD NumWritten;
DWORD NumRead;
FDEVICEHEADER* pOldHeaderInfo = NULL;
FDEVICEHEADER* pNewHeaderInfo = NULL;
DWORD dwOffset;
DWORD i;
DWORD NewEntries;
DWORD NextEntry;
DWORD Biggest;
BYTE* pBuffer = NULL;
// Does the file already exist, or do we need to create a new one?
hOld = OpenCacheFile (GENERIC_READ, OPEN_EXISTING, DXCACHEFILENAME, FName);
if (hOld == INVALID_HANDLE_VALUE)
{
bNewFile = TRUE;
}
else
{
// We don't want this file to get over 65K. If writing this entry
// will cause the file size to exceed that, then we will delete all
// of the existing data and start from scratch.
DWORD dwLow;
DWORD dwHigh;
dwLow = GetFileSize (hOld, &dwHigh);
if ((dwHigh != 0) || ((sizeof(DWORD) - dwLow) < CapsSize))
{
CloseHandle(hOld);
bNewFile = TRUE;
}
}
if (bNewFile)
{
// We are creating a new file, which is pretty easy
hNew = OpenCacheFile (GENERIC_WRITE, CREATE_ALWAYS, DXCACHEFILENAME, NewFName);
if (hNew != INVALID_HANDLE_VALUE)
{
NewHeaderSize = sizeof (FDEVICEHEADER);
WriteFile (hNew, &NewHeaderSize, sizeof(NewHeaderSize), &NumWritten, NULL);
if (NumWritten == sizeof(NewHeaderSize))
{
FDEVICEHEADER DevHeader;
DevHeader.VendorId = pDI->VendorId;
DevHeader.DeviceId = pDI->DeviceId;
DevHeader.SubSysId = pDI->SubSysId;
DevHeader.Revision = pDI->Revision;
DevHeader.FileOffset = sizeof(FDEVICEHEADER) + sizeof(DWORD);
DevHeader.Size = CapsSize;
WriteFile (hNew, &DevHeader, sizeof(DevHeader), &NumWritten, NULL);
if (NumWritten == sizeof(DevHeader))
{
WriteFile (hNew, pCaps, CapsSize, &NumWritten, NULL);
}
}
CloseHandle(hNew);
}
}
else
{
// The file already exists, so we will create a new file and copy all of the contents
// from the existing file over.
hNew = OpenCacheFile (GENERIC_WRITE, CREATE_ALWAYS, DXTEMPFILENAME, NewFName);
if (hNew == INVALID_HANDLE_VALUE)
{
goto FileError;
}
ReadFile (hOld, &OldHeaderSize, sizeof(DWORD), &NumRead, NULL);
if (NumRead < sizeof(DWORD))
{
goto FileError;
}
pOldHeaderInfo = (FDEVICEHEADER*) MemAlloc(OldHeaderSize);
if (pOldHeaderInfo == NULL)
{
goto FileError;
}
ReadFile (hOld, pOldHeaderInfo, OldHeaderSize, &NumRead, NULL);
if (NumRead < OldHeaderSize)
{
goto FileError;
}
// How many entries will exist in the new header?
NewEntries = 1;
for (i = 0; i < OldHeaderSize / sizeof (FDEVICEHEADER); i++)
{
if ((pOldHeaderInfo[i].VendorId != pDI->VendorId) ||
(pOldHeaderInfo[i].DeviceId != pDI->DeviceId) ||
(pOldHeaderInfo[i].SubSysId != pDI->SubSysId) ||
(pOldHeaderInfo[i].Revision != pDI->Revision))
{
NewEntries++;
}
}
pNewHeaderInfo = (FDEVICEHEADER*) MemAlloc(sizeof(FDEVICEHEADER) * NewEntries);
if (pNewHeaderInfo == NULL)
{
goto FileError;
}
// Fill in the header info for each device and save it to the new file
dwOffset = (sizeof(FDEVICEHEADER) * NewEntries) + sizeof(DWORD);
pNewHeaderInfo[0].VendorId = pDI->VendorId;
pNewHeaderInfo[0].DeviceId = pDI->DeviceId;
pNewHeaderInfo[0].SubSysId = pDI->SubSysId;
pNewHeaderInfo[0].Revision = pDI->Revision;
pNewHeaderInfo[0].FileOffset = dwOffset;
pNewHeaderInfo[0].Size = CapsSize;
dwOffset += CapsSize;
NextEntry = 1;
for (i = 0; i < OldHeaderSize / sizeof (FDEVICEHEADER); i++)
{
if ((pOldHeaderInfo[i].VendorId != pDI->VendorId) ||
(pOldHeaderInfo[i].DeviceId != pDI->DeviceId) ||
(pOldHeaderInfo[i].SubSysId != pDI->SubSysId) ||
(pOldHeaderInfo[i].Revision != pDI->Revision))
{
pNewHeaderInfo[NextEntry].VendorId = pOldHeaderInfo[i].VendorId;
pNewHeaderInfo[NextEntry].DeviceId = pOldHeaderInfo[i].DeviceId;
pNewHeaderInfo[NextEntry].SubSysId = pOldHeaderInfo[i].SubSysId;
pNewHeaderInfo[NextEntry].Revision = pOldHeaderInfo[i].Revision;
pNewHeaderInfo[NextEntry].FileOffset = dwOffset;
pNewHeaderInfo[NextEntry].Size = pOldHeaderInfo[i].Size;
dwOffset += pOldHeaderInfo[i].Size;
NextEntry++;
}
}
NewHeaderSize = sizeof(FDEVICEHEADER) * NewEntries;
WriteFile (hNew, &NewHeaderSize, sizeof(NewHeaderSize), &NumWritten, NULL);
if (NumWritten != sizeof(NewHeaderSize))
{
goto FileError;
}
WriteFile (hNew, pNewHeaderInfo, NewHeaderSize, &NumWritten, NULL);
if (NumWritten != NewHeaderSize)
{
goto FileError;
}
// Write the new device data to the file
WriteFile (hNew, pCaps, CapsSize, &NumWritten, NULL);
if (NumWritten != CapsSize)
{
goto FileError;
}
if (NewEntries > 1)
{
// Figure out how big the biggest device size is and allocate a buffer
// to hold it
Biggest = 0;
for (i = 1; i < NewEntries; i++)
{
if (pNewHeaderInfo[i].Size > Biggest)
{
Biggest = pNewHeaderInfo[i].Size;
}
}
pBuffer = (BYTE*) MemAlloc(Biggest);
if (pBuffer == NULL)
{
goto FileError;
}
// Now read the device data from the old file and write it to
// the new on.
NextEntry = 0;
for (i = 0; i < OldHeaderSize / sizeof (FDEVICEHEADER); i++)
{
if ((pOldHeaderInfo[i].VendorId != pDI->VendorId) ||
(pOldHeaderInfo[i].DeviceId != pDI->DeviceId) ||
(pOldHeaderInfo[i].SubSysId != pDI->SubSysId) ||
(pOldHeaderInfo[i].Revision != pDI->Revision))
{
if (SetFilePointer (hOld, pOldHeaderInfo[i].FileOffset, NULL, FILE_BEGIN) !=
pOldHeaderInfo[i].FileOffset)
{
goto FileError;
}
ReadFile (hOld, pBuffer, pOldHeaderInfo[i].Size, &NumRead, NULL);
if (NumRead < pOldHeaderInfo[i].Size)
{
goto FileError;
}
WriteFile (hNew, pBuffer, pOldHeaderInfo[i].Size, &NumWritten, NULL);
if (NumWritten != pOldHeaderInfo[i].Size)
{
goto FileError;
}
}
}
}
// If we made it this far, then everything worked
CloseHandle(hNew);
CloseHandle(hOld);
DeleteFile(FName);
MoveFile(NewFName, FName);
if (pNewHeaderInfo != NULL)
{
MemFree(pNewHeaderInfo);
}
if (pOldHeaderInfo != NULL)
{
MemFree(pOldHeaderInfo);
}
if (pBuffer != NULL)
{
MemFree(pBuffer);
}
return;
FileError:
CloseHandle(hNew);
CloseHandle(hOld);
DeleteFile(FName);
DeleteFile(NewFName);
if (pNewHeaderInfo != NULL)
{
MemFree(pNewHeaderInfo);
}
if (pOldHeaderInfo != NULL)
{
MemFree(pOldHeaderInfo);
}
if (pBuffer != NULL)
{
MemFree(pBuffer);
}
}
}
void RemoveFromCache(D3DADAPTER_IDENTIFIER8* pDI)
{
char FName[MAX_PATH + 16];
char NewFName[MAX_PATH + 16];
BOOL bNewFile = FALSE;
HANDLE hOld;
HANDLE hNew;
DWORD NewHeaderSize;
DWORD OldHeaderSize;
DWORD NumWritten;
DWORD NumRead;
FDEVICEHEADER* pOldHeaderInfo = NULL;
FDEVICEHEADER* pNewHeaderInfo = NULL;
DWORD dwOffset;
DWORD i;
DWORD NewEntries;
DWORD NextEntry;
DWORD Biggest;
BYTE* pBuffer = NULL;
// Does the file already exist, or do we need to create a new one?
hOld = OpenCacheFile (GENERIC_READ, OPEN_EXISTING, DXCACHEFILENAME, FName);
if (hOld == INVALID_HANDLE_VALUE)
{
return;
}
ReadFile (hOld, &OldHeaderSize, sizeof(DWORD), &NumRead, NULL);
if (NumRead < sizeof(DWORD))
{
goto FileError;
}
if (OldHeaderSize <= sizeof(FDEVICEHEADER))
{
// Theres only one entry in the file, so all we need to do
// is delete it.
DeleteFile(FName);
return;
}
pOldHeaderInfo = (FDEVICEHEADER*) MemAlloc(OldHeaderSize);
if (pOldHeaderInfo == NULL)
{
goto FileError;
}
ReadFile (hOld, pOldHeaderInfo, OldHeaderSize, &NumRead, NULL);
if (NumRead < OldHeaderSize)
{
goto FileError;
}
// Create a new file and copy all of the contents from the existing file over.
hNew = OpenCacheFile (GENERIC_WRITE, CREATE_ALWAYS, DXTEMPFILENAME, NewFName);
if (hNew == INVALID_HANDLE_VALUE)
{
goto FileError;
}
// How many entries will exist in the new header?
NewEntries = 0;
for (i = 0; i < OldHeaderSize / sizeof (FDEVICEHEADER); i++)
{
if ((pOldHeaderInfo[i].VendorId != pDI->VendorId) ||
(pOldHeaderInfo[i].DeviceId != pDI->DeviceId) ||
(pOldHeaderInfo[i].SubSysId != pDI->SubSysId) ||
(pOldHeaderInfo[i].Revision != pDI->Revision))
{
NewEntries++;
}
}
pNewHeaderInfo = (FDEVICEHEADER*) MemAlloc(sizeof(FDEVICEHEADER) * NewEntries);
if (pNewHeaderInfo == NULL)
{
goto FileError;
}
// Fill in the header info for each device and save it to the new file
dwOffset = (sizeof(FDEVICEHEADER) * NewEntries) + sizeof(DWORD);
NextEntry = 0;
for (i = 0; i < OldHeaderSize / sizeof (FDEVICEHEADER); i++)
{
if ((pOldHeaderInfo[i].VendorId != pDI->VendorId) ||
(pOldHeaderInfo[i].DeviceId != pDI->DeviceId) ||
(pOldHeaderInfo[i].SubSysId != pDI->SubSysId) ||
(pOldHeaderInfo[i].Revision != pDI->Revision))
{
pNewHeaderInfo[NextEntry].VendorId = pOldHeaderInfo[i].VendorId;
pNewHeaderInfo[NextEntry].DeviceId = pOldHeaderInfo[i].DeviceId;
pNewHeaderInfo[NextEntry].SubSysId = pOldHeaderInfo[i].SubSysId;
pNewHeaderInfo[NextEntry].Revision = pOldHeaderInfo[i].Revision;
pNewHeaderInfo[NextEntry].FileOffset = dwOffset;
pNewHeaderInfo[NextEntry].Size = pOldHeaderInfo[i].Size;
dwOffset += pOldHeaderInfo[i].Size;
NextEntry++;
}
}
NewHeaderSize = sizeof(FDEVICEHEADER) * NewEntries;
WriteFile (hNew, &NewHeaderSize, sizeof(NewHeaderSize), &NumWritten, NULL);
if (NumWritten != sizeof(NewHeaderSize))
{
goto FileError;
}
WriteFile (hNew, pNewHeaderInfo, NewHeaderSize, &NumWritten, NULL);
if (NumWritten != NewHeaderSize)
{
goto FileError;
}
// Figure out how big the biggest device size is and allocate a buffer
// to hold it
Biggest = 0;
for (i = 0; i < NewEntries; i++)
{
if (pNewHeaderInfo[i].Size > Biggest)
{
Biggest = pNewHeaderInfo[i].Size;
}
}
pBuffer = (BYTE*) MemAlloc(Biggest);
if (pBuffer == NULL)
{
goto FileError;
}
// Now read the device data from the old file and write it to
// the new on.
NextEntry = 0;
for (i = 0; i < OldHeaderSize / sizeof (FDEVICEHEADER); i++)
{
if ((pOldHeaderInfo[i].VendorId != pDI->VendorId) ||
(pOldHeaderInfo[i].DeviceId != pDI->DeviceId) ||
(pOldHeaderInfo[i].SubSysId != pDI->SubSysId) ||
(pOldHeaderInfo[i].Revision != pDI->Revision))
{
if (SetFilePointer (hOld, pOldHeaderInfo[i].FileOffset, NULL, FILE_BEGIN) !=
pOldHeaderInfo[i].FileOffset)
{
goto FileError;
}
ReadFile (hOld, pBuffer, pOldHeaderInfo[i].Size, &NumRead, NULL);
if (NumRead < pOldHeaderInfo[i].Size)
{
goto FileError;
}
WriteFile (hNew, pBuffer, pOldHeaderInfo[i].Size, &NumWritten, NULL);
if (NumWritten != pOldHeaderInfo[i].Size)
{
goto FileError;
}
}
}
// If we made it this far, then everything worked
CloseHandle(hNew);
CloseHandle(hOld);
DeleteFile(FName);
MoveFile(NewFName, FName);
if (pNewHeaderInfo != NULL)
{
MemFree(pNewHeaderInfo);
}
if (pOldHeaderInfo != NULL)
{
MemFree(pOldHeaderInfo);
}
if (pBuffer != NULL)
{
MemFree(pBuffer);
}
return;
FileError:
CloseHandle(hNew);
CloseHandle(hOld);
if (pNewHeaderInfo != NULL)
{
MemFree(pNewHeaderInfo);
}
if (pOldHeaderInfo != NULL)
{
MemFree(pOldHeaderInfo);
}
if (pBuffer != NULL)
{
MemFree(pBuffer);
}
}