mirror of
https://github.com/reactos/reactos.git
synced 2024-08-12 14:16:30 +00:00
300 lines
9.1 KiB
C
300 lines
9.1 KiB
C
/*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS kernel
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* FILE: lib/opengl32/icdload.c
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* PURPOSE: OpenGL32 lib, ICD dll loader
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*/
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#include "opengl32.h"
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#include <winreg.h>
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WINE_DEFAULT_DEBUG_CHANNEL(opengl32);
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struct Drv_Opengl_Info
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{
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DWORD Version; /*!< Driver interface version */
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DWORD DriverVersion; /*!< Driver version */
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WCHAR DriverName[256]; /*!< Driver name */
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};
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static CRITICAL_SECTION icdload_cs = {NULL, -1, 0, 0, 0, 0};
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static struct ICD_Data* ICD_Data_List = NULL;
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static const WCHAR OpenGLDrivers_Key[] = L"SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\OpenGLDrivers";
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static void APIENTRY wglSetCurrentValue(PVOID value)
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{
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IntSetCurrentICDPrivate(value);
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}
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static PVOID APIENTRY wglGetCurrentValue()
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{
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return IntGetCurrentICDPrivate();
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}
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static DHGLRC wglGetDHGLRC(struct wgl_context* context)
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{
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return context->dhglrc;
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}
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/* GDI entry points (win32k) */
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extern INT APIENTRY GdiDescribePixelFormat(HDC hdc, INT ipfd, UINT cjpfd, PPIXELFORMATDESCRIPTOR ppfd);
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extern BOOL APIENTRY GdiSetPixelFormat(HDC hdc, INT ipfd);
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extern BOOL APIENTRY GdiSwapBuffers(HDC hdc);
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/* Retrieves the ICD data (driver version + relevant DLL entry points) for a device context */
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struct ICD_Data* IntGetIcdData(HDC hdc)
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{
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int ret;
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DWORD dwInput, dwValueType, Version, DriverVersion, Flags;
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struct Drv_Opengl_Info DrvInfo;
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struct ICD_Data* data;
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HKEY OglKey, DrvKey;
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WCHAR DllName[MAX_PATH];
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BOOL (WINAPI *DrvValidateVersion)(DWORD);
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void (WINAPI *DrvSetCallbackProcs)(int nProcs, PROC* pProcs);
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/* First, see if the driver supports this */
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dwInput = OPENGL_GETINFO;
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ret = ExtEscape(hdc,
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QUERYESCSUPPORT,
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sizeof(DWORD),
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(LPCSTR)&dwInput,
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0,
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NULL);
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if(ret <= 0)
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{
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/* Driver doesn't support opengl */
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return NULL;
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}
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/* Query for the ICD DLL name and version */
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dwInput = 0;
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ret = ExtEscape(hdc,
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OPENGL_GETINFO,
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sizeof(DWORD),
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(LPCSTR)&dwInput,
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sizeof(DrvInfo),
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(LPSTR)&DrvInfo);
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if(ret <= 0)
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{
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ERR("Driver claims to support OPENGL_GETINFO escape code, but doesn't.\n");
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return NULL;
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}
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/* Protect the list while we are loading*/
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EnterCriticalSection(&icdload_cs);
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/* Search for it in the list of already loaded modules */
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data = ICD_Data_List;
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while(data)
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{
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if(!_wcsicmp(data->DriverName, DrvInfo.DriverName))
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{
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/* Found it */
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TRACE("Found already loaded %p.\n", data);
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LeaveCriticalSection(&icdload_cs);
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return data;
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}
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data = data->next;
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}
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/* It was still not loaded, look for it in the registry */
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ret = RegOpenKeyExW(HKEY_LOCAL_MACHINE, OpenGLDrivers_Key, 0, KEY_READ, &OglKey);
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if(ret != ERROR_SUCCESS)
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{
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ERR("Failed to open the OpenGLDrivers key.\n");
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goto end;
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}
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ret = RegOpenKeyExW(OglKey, DrvInfo.DriverName, 0, KEY_READ, &DrvKey);
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if(ret != ERROR_SUCCESS)
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{
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/* Some driver installer just provide the DLL name, like the Matrox G400 */
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TRACE("No driver subkey for %S, trying to get DLL name directly.\n", DrvInfo.DriverName);
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dwInput = sizeof(DllName);
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ret = RegQueryValueExW(OglKey, DrvInfo.DriverName, 0, &dwValueType, (LPBYTE)DllName, &dwInput);
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if((ret != ERROR_SUCCESS) || (dwValueType != REG_SZ))
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{
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ERR("Unable to get ICD DLL name!.\n");
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RegCloseKey(OglKey);
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goto end;
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}
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Version = DriverVersion = Flags = 0;
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TRACE("DLL name is %S.\n", DllName);
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}
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else
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{
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/* The driver have a subkey for the ICD */
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TRACE("Querying details from registry for %S.\n", DrvInfo.DriverName);
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dwInput = sizeof(DllName);
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ret = RegQueryValueExW(DrvKey, L"Dll", 0, &dwValueType, (LPBYTE)DllName, &dwInput);
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if((ret != ERROR_SUCCESS) || (dwValueType != REG_SZ))
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{
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ERR("Unable to get ICD DLL name!.\n");
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RegCloseKey(DrvKey);
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RegCloseKey(OglKey);
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goto end;
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}
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dwInput = sizeof(Version);
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ret = RegQueryValueExW(DrvKey, L"Version", 0, &dwValueType, (LPBYTE)&Version, &dwInput);
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if((ret != ERROR_SUCCESS) || (dwValueType != REG_DWORD))
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{
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WARN("No version in driver subkey\n");
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}
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else if(Version != DrvInfo.Version)
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{
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ERR("Version mismatch between registry (%lu) and display driver (%lu).\n", Version, DrvInfo.Version);
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RegCloseKey(DrvKey);
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RegCloseKey(OglKey);
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goto end;
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}
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dwInput = sizeof(DriverVersion);
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ret = RegQueryValueExW(DrvKey, L"DriverVersion", 0, &dwValueType, (LPBYTE)&DriverVersion, &dwInput);
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if((ret != ERROR_SUCCESS) || (dwValueType != REG_DWORD))
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{
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WARN("No driver version in driver subkey\n");
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}
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else if(DriverVersion != DrvInfo.DriverVersion)
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{
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ERR("Driver version mismatch between registry (%lu) and display driver (%lu).\n", DriverVersion, DrvInfo.DriverVersion);
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RegCloseKey(DrvKey);
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RegCloseKey(OglKey);
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goto end;
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}
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dwInput = sizeof(Flags);
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ret = RegQueryValueExW(DrvKey, L"Flags", 0, &dwValueType, (LPBYTE)&Flags, &dwInput);
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if((ret != ERROR_SUCCESS) || (dwValueType != REG_DWORD))
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{
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WARN("No driver version in driver subkey\n");
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Flags = 0;
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}
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/* We're done */
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RegCloseKey(DrvKey);
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TRACE("DLL name is %S, Version %lx, DriverVersion %lx, Flags %lx.\n", DllName, Version, DriverVersion, Flags);
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}
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/* No need for this anymore */
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RegCloseKey(OglKey);
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/* So far so good, allocate data */
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data = HeapAlloc(GetProcessHeap(), 0, sizeof(*data));
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if(!data)
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{
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ERR("Unable to allocate ICD data!\n");
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goto end;
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}
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/* Load the library */
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data->hModule = LoadLibraryW(DllName);
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if(!data->hModule)
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{
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ERR("Could not load the ICD DLL: %S.\n", DllName);
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HeapFree(GetProcessHeap(), 0, data);
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data = NULL;
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goto end;
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}
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/*
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* Validate version, if needed.
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* Some drivers (at least VBOX), initialize stuff upon this call.
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*/
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DrvValidateVersion = (void*)GetProcAddress(data->hModule, "DrvValidateVersion");
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if(DrvValidateVersion)
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{
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if(!DrvValidateVersion(DrvInfo.DriverVersion))
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{
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ERR("DrvValidateVersion failed!.\n");
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goto fail;
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}
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}
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/* Pass the callbacks */
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DrvSetCallbackProcs = (void*)GetProcAddress(data->hModule, "DrvSetCallbackProcs");
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if(DrvSetCallbackProcs)
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{
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PROC callbacks[] = {(PROC)wglGetCurrentValue,
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(PROC)wglSetCurrentValue,
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(PROC)wglGetDHGLRC};
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DrvSetCallbackProcs(3, callbacks);
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}
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/* Get the DLL exports */
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#define DRV_LOAD(x) do \
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{ \
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data->x = (void*)GetProcAddress(data->hModule, #x); \
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if(!data->x) { \
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ERR("%S lacks " #x "!\n", DllName); \
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goto fail; \
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} \
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} while(0)
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DRV_LOAD(DrvCopyContext);
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DRV_LOAD(DrvCreateContext);
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DRV_LOAD(DrvCreateLayerContext);
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DRV_LOAD(DrvDeleteContext);
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DRV_LOAD(DrvDescribeLayerPlane);
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DRV_LOAD(DrvDescribePixelFormat);
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DRV_LOAD(DrvGetLayerPaletteEntries);
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DRV_LOAD(DrvGetProcAddress);
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DRV_LOAD(DrvReleaseContext);
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DRV_LOAD(DrvRealizeLayerPalette);
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DRV_LOAD(DrvSetContext);
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DRV_LOAD(DrvSetLayerPaletteEntries);
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DRV_LOAD(DrvSetPixelFormat);
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DRV_LOAD(DrvShareLists);
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DRV_LOAD(DrvSwapBuffers);
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DRV_LOAD(DrvSwapLayerBuffers);
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#undef DRV_LOAD
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/* Let's see if GDI should handle this instead of the ICD DLL */
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// FIXME: maybe there is a better way
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if (GdiDescribePixelFormat(hdc, 0, 0, NULL) != 0)
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{
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/* GDI knows what to do with that. Override */
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TRACE("Forwarding WGL calls to win32k!\n");
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data->DrvDescribePixelFormat = GdiDescribePixelFormat;
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data->DrvSetPixelFormat = GdiSetPixelFormat;
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data->DrvSwapBuffers = GdiSwapBuffers;
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}
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/* Copy the DriverName */
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wcscpy(data->DriverName, DrvInfo.DriverName);
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/* Push the list */
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data->next = ICD_Data_List;
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ICD_Data_List = data;
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TRACE("Returning %p.\n", data);
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end:
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/* Unlock and return */
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LeaveCriticalSection(&icdload_cs);
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return data;
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fail:
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LeaveCriticalSection(&icdload_cs);
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FreeLibrary(data->hModule);
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HeapFree(GetProcessHeap(), 0, data);
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return NULL;
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}
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void IntDeleteAllICDs(void)
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{
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struct ICD_Data* data;
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EnterCriticalSection(&icdload_cs);
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while (ICD_Data_List != NULL)
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{
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data = ICD_Data_List;
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ICD_Data_List = data->next;
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FreeLibrary(data->hModule);
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HeapFree(GetProcessHeap(), 0, data);
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}
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}
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