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Diffstat (limited to 'board/MAI/bios_emulator/scitech/src/common/gawin32.c')
| -rw-r--r-- | board/MAI/bios_emulator/scitech/src/common/gawin32.c | 256 |
1 files changed, 256 insertions, 0 deletions
diff --git a/board/MAI/bios_emulator/scitech/src/common/gawin32.c b/board/MAI/bios_emulator/scitech/src/common/gawin32.c new file mode 100644 index 000000000..a2a415095 --- /dev/null +++ b/board/MAI/bios_emulator/scitech/src/common/gawin32.c @@ -0,0 +1,256 @@ +/**************************************************************************** +* +* SciTech Nucleus Graphics Architecture +* +* Copyright (C) 1991-1998 SciTech Software, Inc. +* All rights reserved. +* +* ====================================================================== +* |REMOVAL OR MODIFICATION OF THIS HEADER IS STRICTLY PROHIBITED BY LAW| +* | | +* |This copyrighted computer code contains proprietary technology | +* |owned by SciTech Software, Inc., located at 505 Wall Street, | +* |Chico, CA 95928 USA (http://www.scitechsoft.com). | +* | | +* |The contents of this file are subject to the SciTech Nucleus | +* |License; you may *not* use this file or related software except in | +* |compliance with the License. You may obtain a copy of the License | +* |at http://www.scitechsoft.com/nucleus-license.txt | +* | | +* |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. | +* | | +* |REMOVAL OR MODIFICATION OF THIS HEADER IS STRICTLY PROHIBITED BY LAW| +* ====================================================================== +* +* Language: ANSI C +* Environment: Win32 +* +* Description: OS specific Nucleus Graphics Architecture services for +* the Win32 operating system environments. +* +****************************************************************************/ + +#include "pm_help.h" +#include "pmapi.h" +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#define STRICT +#define WIN32_LEAN_AND_MEAN +#include <windows.h> + +/*------------------------- Global Variables ------------------------------*/ + +#define DLL_NAME "nga_w32.dll" + +extern HANDLE _PM_hDevice; +static HMODULE hModDLL = NULL; +static ibool useRing0Driver = false; +static ibool haveRDTSC; +static GA_largeInteger countFreq; + +/*-------------------------- Implementation -------------------------------*/ + +/**************************************************************************** +REMARKS: +Loads the shared "nga_w32.dll" library from disk and connects to it. This +library is *always* located in the same directory as the Nucleus +graphics.bpd file. +****************************************************************************/ +static ibool LoadSharedDLL(void) +{ + char filename[PM_MAX_PATH]; + char bpdpath[PM_MAX_PATH]; + + /* Check if we have already loaded the DLL */ + if (hModDLL) + return true; + PM_init(); + + /* Open the DLL file */ + if (!PM_findBPD(DLL_NAME,bpdpath)) + return false; + strcpy(filename,bpdpath); + strcat(filename,DLL_NAME); + if ((hModDLL = LoadLibrary(filename)) == NULL) + return false; + return true; +} + +/**************************************************************************** +PARAMETERS: +path - Local path to the Nucleus driver files. + +REMARKS: +This function is used by the application program to override the location +of the Nucleus driver files that are loaded. Normally the loader code +will look in the system Nucleus directories first, then in the 'drivers' +directory relative to the current working directory, and finally relative +to the MGL_ROOT environment variable. + +Note that for Win32 we also call into the loaded PMHELP device driver +as necessary to change the local Nucleus path for system wide Nucleus +drivers. +****************************************************************************/ +void NAPI GA_setLocalPath( + const char *path) +{ + DWORD inBuf[1]; + DWORD outBuf[1],outCnt; + + PM_setLocalBPDPath(path); + if (_PM_hDevice != INVALID_HANDLE_VALUE) { + inBuf[0] = (DWORD)path; + DeviceIoControl(_PM_hDevice, PMHELP_GASETLOCALPATH32, + inBuf, sizeof(inBuf), outBuf, sizeof(outBuf), &outCnt, NULL); + } +} + +/**************************************************************************** +RETURNS: +Pointer to the system wide PM library imports, or the internal version if none + +REMARKS: +In order to support deploying new Nucleus drivers that may require updated +PM library functions, we check here to see if there is a system wide version +of the PM functions available. If so we return those functions for use with +the system wide Nucleus drivers, otherwise the compiled in version of the PM +library is used with the application local version of Nucleus. +****************************************************************************/ +PM_imports * NAPI GA_getSystemPMImports(void) +{ + PM_imports * pmImp; + PM_imports * (NAPIP _GA_getSystemPMImports)(void); + + if (LoadSharedDLL()) { + /* Note that Visual C++ build DLL's with only a single underscore in front + * of the exported name while Watcom C provides two of them. We check for + * both to allow working with either compiled DLL. + */ + if ((_GA_getSystemPMImports = (void*)GetProcAddress(hModDLL,"_GA_getSystemPMImports")) != NULL) { + if ((_GA_getSystemPMImports = (void*)GetProcAddress(hModDLL,"__GA_getSystemPMImports")) != NULL) { + pmImp = _GA_getSystemPMImports(); + memcpy(&_PM_imports,pmImp,MIN(_PM_imports.dwSize,pmImp->dwSize)); + return pmImp; + } + } + } + return &_PM_imports; +} + +/**************************************************************************** +PARAMETERS: +gaExp - Place to store the exported functions +shared - True if connecting to the shared, global Nucleus driver + +REMARKS: +For Win32 if we are connecting to the shared, global Nucleus driver (loaded +at ring 0) then we need to load a special nga_w32.dll library which contains +thunks to call down into the Ring 0 device driver as necessary. If we are +connecting to the application local Nucleus drivers (ie: Nucleus on DirectDraw +emulation layer) then we do nothing here. +****************************************************************************/ +ibool NAPI GA_getSharedExports( + GA_exports *gaExp, + ibool shared) +{ + GA_exports * exp; + GA_exports * (NAPIP _GA_getSystemGAExports)(void); + + useRing0Driver = false; + if (shared) { + if (!LoadSharedDLL()) + PM_fatalError("Unable to load " DLL_NAME "!"); + if ((_GA_getSystemGAExports = (void*)GetProcAddress(hModDLL,"_GA_getSystemGAExports")) == NULL) + if ((_GA_getSystemGAExports = (void*)GetProcAddress(hModDLL,"__GA_getSystemGAExports")) == NULL) + PM_fatalError("Unable to load " DLL_NAME "!"); + exp = _GA_getSystemGAExports(); + memcpy(gaExp,exp,MIN(gaExp->dwSize,exp->dwSize)); + useRing0Driver = true; + return true; + } + return false; +} + +#ifndef TEST_HARNESS +/**************************************************************************** +REMARKS: +Nothing special for this OS +****************************************************************************/ +ibool NAPI GA_queryFunctions( + GA_devCtx *dc, + N_uint32 id, + void _FAR_ *funcs) +{ + static ibool (NAPIP _GA_queryFunctions)(GA_devCtx *dc,N_uint32 id,void _FAR_ *funcs) = NULL; + + if (useRing0Driver) { + // Call the version in nga_w32.dll if it is loaded + if (!_GA_queryFunctions) { + if ((_GA_queryFunctions = (void*)GetProcAddress(hModDLL,"_GA_queryFunctions")) == NULL) + if ((_GA_queryFunctions = (void*)GetProcAddress(hModDLL,"__GA_queryFunctions")) == NULL) + PM_fatalError("Unable to get exports from " DLL_NAME "!"); + } + return _GA_queryFunctions(dc,id,funcs); + } + return __GA_exports.GA_queryFunctions(dc,id,funcs); +} + +/**************************************************************************** +REMARKS: +Nothing special for this OS +****************************************************************************/ +ibool NAPI REF2D_queryFunctions( + REF2D_driver *ref2d, + N_uint32 id, + void _FAR_ *funcs) +{ + static ibool (NAPIP _REF2D_queryFunctions)(REF2D_driver *ref2d,N_uint32 id,void _FAR_ *funcs) = NULL; + + if (useRing0Driver) { + // Call the version in nga_w32.dll if it is loaded + if (!_REF2D_queryFunctions) { + if ((_REF2D_queryFunctions = (void*)GetProcAddress(hModDLL,"_REF2D_queryFunctions")) == NULL) + if ((_REF2D_queryFunctions = (void*)GetProcAddress(hModDLL,"__REF2D_queryFunctions")) == NULL) + PM_fatalError("Unable to get exports from " DLL_NAME "!"); + } + return _REF2D_queryFunctions(ref2d,id,funcs); + } + return __GA_exports.REF2D_queryFunctions(ref2d,id,funcs); +} +#endif + +/**************************************************************************** +REMARKS: +This function initialises the high precision timing functions for the +Nucleus loader library. +****************************************************************************/ +ibool NAPI GA_TimerInit(void) +{ + if (_GA_haveCPUID() && (_GA_getCPUIDFeatures() & CPU_HaveRDTSC) != 0) { + haveRDTSC = true; + return true; + } + else if (QueryPerformanceFrequency((LARGE_INTEGER*)&countFreq)) { + haveRDTSC = false; + return true; + } + return false; +} + +/**************************************************************************** +REMARKS: +This function reads the high resolution timer. +****************************************************************************/ +void NAPI GA_TimerRead( + GA_largeInteger *value) +{ + if (haveRDTSC) + _GA_readTimeStamp(value); + else + QueryPerformanceCounter((LARGE_INTEGER*)value); +} + |