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/* Copyright (C) 2017 Wildfire Games.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/*
* graphics card detection on Windows.
*/
#include "precompiled.h"
#include "lib/sysdep/os/win/wgfx.h"
#include "lib/sysdep/gfx.h"
#include "lib/sysdep/os/win/wdll_ver.h"
#include "lib/sysdep/os/win/wutil.h"
#if MSC_VERSION
#pragma comment(lib, "advapi32.lib") // registry
#endif
// note: this implementation doesn't require OpenGL to be initialized.
static Status AppendDriverVersionsFromRegistry(VersionList& versionList)
{
// rationale:
// - we could easily determine the 2d driver via EnumDisplaySettings,
// but we want to query the actual OpenGL driver. see
// http://www.opengl.org/discussion_boards/ubb/Forum3/HTML/009679.html ;
// in short, we need the exact OpenGL driver version because some
// driver packs (e.g. Omega) mix and match DLLs.
// - an alternative implementation would be to enumerate all
// DLLs loaded into the process, and check for a glBegin export.
// that requires toolhelp/PSAPI (a bit complicated) and telling
// ICD/opengl32.dll apart (not future-proof).
// - therefore, we stick with the OpenGLDrivers approach. since there is
// no good way to determine which of the subkeys (e.g. nvoglnt) is
// active (several may exist due to previously removed drivers),
// we just display all of them. it is obvious from looking at
// gfx_card which one is correct; we thus avoid driver-specific
// name checks and reporting incorrectly.
wchar_t dllName[MAX_PATH+1];
HKEY hkDrivers;
const wchar_t* key = L"SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\OpenGLDrivers";
// (we've received word of this failing on one WinXP system, but
// AppendDriverVersionsFromKnownFiles might still work.)
if(RegOpenKeyExW(HKEY_LOCAL_MACHINE, key, 0, KEY_READ, &hkDrivers) != 0)
return ERR::FAIL; // NOWARN (see above)
// for each subkey (i.e. installed OpenGL driver):
for(DWORD i = 0; ; i++)
{
wchar_t driverName[32];
DWORD driverNameLength = ARRAY_SIZE(driverName);
const LONG err = RegEnumKeyExW(hkDrivers, i, driverName, &driverNameLength, 0, 0, 0, 0);
if(err == ERROR_NO_MORE_ITEMS)
{
if(i == 0)
{
RegCloseKey(hkDrivers);
return ERR::NOT_SUPPORTED; // NOWARN (ATI and NVidia don't create sub-keys on Windows 7)
}
break;
}
ENSURE(err == ERROR_SUCCESS);
HKEY hkDriver;
if(RegOpenKeyExW(hkDrivers, driverName, 0, KEY_QUERY_VALUE, &hkDriver) == 0)
{
DWORD dllNameLength = ARRAY_SIZE(dllName)-5; // for ".dll"
if(RegQueryValueExW(hkDriver, L"Dll", 0, 0, (LPBYTE)dllName, &dllNameLength) == 0)
wdll_ver_Append(dllName, versionList);
RegCloseKey(hkDriver);
}
}
// for each value:
// (some old drivers, e.g. S3 Super Savage, store their ICD name in a
// single REG_SZ value. we therefore include those as well.)
for(DWORD i = 0; ; i++)
{
wchar_t name[100]; // we don't need this, but RegEnumValue fails otherwise.
DWORD nameLength = ARRAY_SIZE(name);
DWORD type;
DWORD dllNameLength = ARRAY_SIZE(dllName)-5; // for ".dll"
const DWORD err = RegEnumValueW(hkDrivers, i, name, &nameLength, 0, &type, (LPBYTE)dllName, &dllNameLength);
if(err == ERROR_NO_MORE_ITEMS)
break;
ENSURE(err == ERROR_SUCCESS);
if(type == REG_SZ)
wdll_ver_Append(dllName, versionList);
}
RegCloseKey(hkDrivers);
return INFO::OK;
}
static void AppendDriverVersionsFromKnownFiles(VersionList& versionList)
{
// (check all known file names regardless of gfx_card, which may change and
// defeat our parsing. this takes about 5..10 ms)
// NVidia
wdll_ver_Append(L"nvoglv64.dll", versionList);
wdll_ver_Append(L"nvoglv32.dll", versionList);
wdll_ver_Append(L"nvoglnt.dll", versionList);
// ATI
wdll_ver_Append(L"atioglxx.dll", versionList);
// Intel
wdll_ver_Append(L"ig4icd32.dll", versionList);
wdll_ver_Append(L"ig4icd64.dll", versionList);
wdll_ver_Append(L"iglicd32.dll", versionList);
}
std::wstring wgfx_DriverInfo()
{
VersionList versionList;
if(AppendDriverVersionsFromRegistry(versionList) != INFO::OK) // (fails on Windows 7)
AppendDriverVersionsFromKnownFiles(versionList);
return versionList;
}
//-----------------------------------------------------------------------------
// direct implementations of some gfx functions
namespace gfx {
Status GetVideoMode(int* xres, int* yres, int* bpp, int* freq)
{
DEVMODE dm = { sizeof(dm) };
if(!EnumDisplaySettings(0, ENUM_CURRENT_SETTINGS, &dm))
WARN_RETURN(ERR::FAIL);
// EnumDisplaySettings is documented to set the values of the following:
const DWORD expectedFlags = DM_PELSWIDTH|DM_PELSHEIGHT|DM_BITSPERPEL|DM_DISPLAYFREQUENCY|DM_DISPLAYFLAGS;
ENSURE((dm.dmFields & expectedFlags) == expectedFlags);
if(xres)
*xres = (int)dm.dmPelsWidth;
if(yres)
*yres = (int)dm.dmPelsHeight;
if(bpp)
*bpp = (int)dm.dmBitsPerPel;
if(freq)
*freq = (int)dm.dmDisplayFrequency;
return INFO::OK;
}
Status GetMonitorSize(int& width_mm, int& height_mm)
{
// (DC for the primary monitor's entire screen)
const HDC hDC = GetDC(0);
width_mm = GetDeviceCaps(hDC, HORZSIZE);
height_mm = GetDeviceCaps(hDC, VERTSIZE);
ReleaseDC(0, hDC);
return INFO::OK;
}
} // namespace gfx
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