forked from 0ad/0ad
329 lines
9.1 KiB
C++
Executable File
329 lines
9.1 KiB
C++
Executable File
// Windows-specific system detect
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//
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// Copyright (c) 2004 Jan Wassenberg
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//
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// This file is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version.
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//
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// This file is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// Contact info:
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// Jan.Wassenberg@stud.uni-karlsruhe.de
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// http://www.stud.uni-karlsruhe.de/~urkt/
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#include "precompiled.h"
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#include "detect.h"
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#include "lib.h"
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#include "win_internal.h"
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#include <assert.h>
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#include <stdio.h>
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#include <stdlib.h>
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// these are all delay-loaded - they're not needed if these
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// routines are never called (to return system info).
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#ifdef _MSC_VER
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#pragma comment(lib, "version.lib") // DLL version
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#pragma comment(lib, "advapi32.lib") // registry
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#pragma comment(lib, "dsound.lib") // sound card name
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#endif
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// EnumDisplayDevices is not available on Win95 or NT.
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// try to import it manually here; return -1 if not available.
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static BOOL (WINAPI *pEnumDisplayDevicesA)(void*, DWORD, void*, DWORD);
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static int import_EnumDisplayDevices()
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{
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if(!pEnumDisplayDevicesA)
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{
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static HMODULE hUser32Dll = LoadLibrary("user32.dll");
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*(void**)&pEnumDisplayDevicesA = GetProcAddress(hUser32Dll, "EnumDisplayDevicesA");
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// FreeLibrary(hUser32Dll);
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// make sure the reference is released so BoundsChecker
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// doesn't complain. it won't actually be unloaded anyway -
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// there is at least one other reference.
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}
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return pEnumDisplayDevicesA? 0 : -1;
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}
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// useful for choosing a video mode.
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// if we fail, outputs are unchanged (assumed initialized to defaults)
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int get_cur_vmode(int* xres, int* yres, int* bpp, int* freq)
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{
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// don't use EnumDisplaySettingsW - BoundsChecker reports it causes
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// a memory overrun (even if called as the very first thing, before
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// static CRT initialization).
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DEVMODEA dm;
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memset(&dm, 0, sizeof(dm));
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dm.dmSize = sizeof(dm);
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// dm.dmDriverExtra already set to 0 by memset
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if(!EnumDisplaySettingsA(0, ENUM_CURRENT_SETTINGS, &dm))
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return -1;
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if(dm.dmFields & DM_PELSWIDTH && xres)
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*xres = (int)dm.dmPelsWidth;
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if(dm.dmFields & DM_PELSHEIGHT && yres)
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*yres = (int)dm.dmPelsHeight;
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if(dm.dmFields & DM_BITSPERPEL && bpp)
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*bpp = (int)dm.dmBitsPerPel;
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if(dm.dmFields & DM_DISPLAYFREQUENCY && freq)
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*freq = (int)dm.dmDisplayFrequency;
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return 0;
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}
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// useful for determining aspect ratio.
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// if we fail, outputs are unchanged (assumed initialized to defaults)
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int get_monitor_size(int& width_mm, int& height_mm)
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{
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HDC dc = GetDC(0); // dc for entire screen
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width_mm = GetDeviceCaps(dc, HORZSIZE);
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height_mm = GetDeviceCaps(dc, VERTSIZE);
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ReleaseDC(0, dc);
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return 0;
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}
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static int win_get_gfx_card()
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{
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if(gfx_card[0] != '\0')
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return -1;
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// make sure EnumDisplayDevices is available (as pEnumDisplayDevicesA)
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if(import_EnumDisplayDevices() < 0)
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return -1;
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DISPLAY_DEVICEA dev = { sizeof(dev) };
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if(!pEnumDisplayDevicesA(0, 0, &dev, 0))
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return -1;
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strncpy(gfx_card, (const char*)dev.DeviceString, GFX_CARD_LEN-1);
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return 0;
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}
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// get the name of the OpenGL driver DLL (used to determine driver version).
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// see: http://www.opengl.org/discussion_boards/ubb/Forum3/HTML/009679.html
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// implementation doesn't currently require OpenGL to be ready for use.
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//
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// an alternative would be to enumerate all DLLs loaded into the process,
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// and check for a glBegin export. this requires OpenGL to be initialized,
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// though - the DLLs aren't loaded at startup. it'd also be a bit of work
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// to sort out MCD, ICD, and opengl32.dll.
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static int get_ogl_drv_name(char* const ogl_drv_name, const size_t max_name_len)
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{
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// need single point of exit so that we can close all keys; return this.
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int ret = -1;
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HKEY hkOglDrivers;
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const char* key = "SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\OpenGLDrivers";
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if(RegOpenKeyEx(HKEY_LOCAL_MACHINE, key, 0, KEY_ENUMERATE_SUB_KEYS, &hkOglDrivers) != 0)
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return -1;
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// we just use the first entry. it might be wrong on dual-graphics card
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// systems, but I don't see a better way to do it. there's no other
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// occurence of the OpenGL driver name in the registry on my system.
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char key_name[32];
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DWORD key_name_len = sizeof(key_name);
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if(RegEnumKeyEx(hkOglDrivers, 0, key_name, &key_name_len, 0, 0, 0, 0) == 0)
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{
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HKEY hkClass;
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if(RegOpenKeyEx(hkOglDrivers, key_name, 0, KEY_QUERY_VALUE, &hkClass) == 0)
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{
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DWORD size = (DWORD)max_name_len-5; // -5 for ".dll"
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if(RegQueryValueEx(hkClass, "Dll", 0, 0, (LPBYTE)ogl_drv_name, &size) == 0)
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{
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// add .dll to filename, if not already there
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char* ext = strrchr(ogl_drv_name, '.');
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if(!ext || stricmp(ext, ".dll") != 0)
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strcat(ogl_drv_name, ".dll");
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ret = 0; // success
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}
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RegCloseKey(hkClass);
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}
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}
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RegCloseKey(hkOglDrivers);
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return ret;
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}
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static int get_ver(const char* module, char* out_ver, size_t out_ver_len)
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{
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WIN_SAVE_LAST_ERROR; // GetFileVersion*, Ver*
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// allocate as much mem as required
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DWORD unused;
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const DWORD ver_size = GetFileVersionInfoSize(module, &unused);
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if(!ver_size)
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return -1;
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void* const buf = malloc(ver_size);
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if(!buf)
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return ERR_NO_MEM;
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// from here on, we set and later return this variable -
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// can't return directly, since we've allocated memory.
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int ret = -1;
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if(GetFileVersionInfo(module, 0, ver_size, buf))
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{
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u16* lang; // -> 16 bit language ID, 16 bit codepage
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uint lang_len;
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const BOOL ok = VerQueryValue(buf, "\\VarFileInfo\\Translation", (void**)&lang, &lang_len);
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if(ok && lang && lang_len == 4)
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{
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char subblock[64];
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sprintf(subblock, "\\StringFileInfo\\%04X%04X\\FileVersion", lang[0], lang[1]);
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const char* in_ver;
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uint in_ver_len;
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if(VerQueryValue(buf, subblock, (void**)&in_ver, &in_ver_len))
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{
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strncpy(out_ver, in_ver, out_ver_len);
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ret = 0; // success
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}
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}
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}
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free(buf);
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WIN_RESTORE_LAST_ERROR;
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return ret;
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}
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int win_get_gfx_drv_ver()
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{
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if(gfx_drv_ver[0] != '\0')
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return -1;
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// note: getting the 2d driver name can be done with EnumDisplaySettings,
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// but we want the actual OpenGL driver. see discussion linked above;
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// the summary is, 2d driver version may differ from the OpenGL driver.
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char ogl_drv_name[MAX_PATH];
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CHECK_ERR(get_ogl_drv_name(ogl_drv_name, sizeof(ogl_drv_name)));
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CHECK_ERR(get_ver(ogl_drv_name, gfx_drv_ver, GFX_DRV_VER_LEN));
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return 0;
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}
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int win_get_gfx_info()
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{
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win_get_gfx_card();
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win_get_gfx_drv_ver();
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return 0;
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}
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// note: OpenAL alGetString is worthless: it only returns OpenAL API version
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// and renderer (e.g. "Software").
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// mmsystem.h is necessary for dsound.h; we cut out unnecessary junk
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#define MMNODRV // Installable driver support
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#define MMNOSOUND // Sound support
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//#define MMNOWAVE // Waveform support
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#define MMNOMIDI // MIDI support
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#define MMNOAUX // Auxiliary audio support
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#define MMNOMIXER // Mixer support
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#define MMNOTIMER // Timer support
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#define MMNOJOY // Joystick support
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#define MMNOMCI // MCI support
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#define MMNOMMIO // Multimedia file I/O support
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#define MMNOMMSYSTEM // General MMSYSTEM functions
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#include <MMSystem.h>
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#define DIRECTSOUND_VERSION 0x0500
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#include <dsound.h>
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static char ds_drv_name[MAX_PATH+1];
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static bool CALLBACK ds_enum(GUID* guid, PCSTR description, PCSTR module, void* ctx)
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{
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// skip if description == "Primary Sound Driver"
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if(module[0] == '\0')
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return true; // continue calling
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// stick with the first "driver name" (sound card) we get;
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// in case there are several, we assume this is the one we want.
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strncpy(snd_card, description, SND_CARD_LEN-1);
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// .. DirectSound driver is in "$system\drivers\";
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// save its path for version check later.
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snprintf(ds_drv_name, MAX_PATH, "%s\\drivers\\%s", win_sys_dir, module);
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return false; // stop calling
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}
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static char* snd_drv_ver_pos = snd_drv_ver;
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// module: complete path or filename only (if on default library search path)
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static void add_drv(const char* module)
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{
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char ver[32];
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if(get_ver(module, ver, sizeof(ver)) < 0)
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strcpy(ver, "unknown version");
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const char* module_fn = strrchr(module, '\\');
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if(!module_fn)
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module_fn = module;
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else
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module_fn++;
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// not first time: prepend comma
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if(snd_drv_ver_pos != snd_drv_ver)
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snd_drv_ver_pos += sprintf(snd_drv_ver_pos, ", ");
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snd_drv_ver_pos += sprintf(snd_drv_ver_pos, "%s (%s)", module_fn, ver);
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}
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int win_get_snd_info()
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{
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if(DirectSoundEnumerate((LPDSENUMCALLBACK)ds_enum, (void*)0) != DS_OK)
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debug_warn("DirectSoundEnumerate failed");
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// find all DLLs related to OpenAL and retrieve their versions.
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// (search system dir for *oal.dll and *OpenAL*,
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// which is also how the router finds implementations).
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add_drv(ds_drv_name);
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DIR* dir = opendir(win_sys_dir);
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if(!dir)
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{
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assert(0);
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return -1;
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}
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while(dirent* ent = readdir(dir))
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{
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const char* fn = ent->d_name;
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const size_t len = strlen(fn);
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const bool oal = len > 7 && !stricmp(fn+len-7, "oal.dll");
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const bool openal = strstr(fn, "OpenAL") != 0;
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if(oal || openal)
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add_drv(fn);
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}
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closedir(dir);
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return 0;
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}
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