/* $Id$ */ /* * This file is part of OpenTTD. * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2. * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>. */ /** @file driver.cpp Base for all driver handling. */ #include "stdafx.h" #include "debug.h" #include "sound/sound_driver.hpp" #include "music/music_driver.hpp" #include "video/video_driver.hpp" #include "string_func.h" VideoDriver *_video_driver; ///< The currently active video driver. char *_ini_videodriver; ///< The video driver a stored in the configuration file. int _num_resolutions; ///< The number of resolutions. Dimension _resolutions[32]; ///< List of resolutions. Dimension _cur_resolution; ///< The current resolution. bool _rightclick_emulate; ///< Whether right clicking is emulated. SoundDriver *_sound_driver; ///< The currently active sound driver. char *_ini_sounddriver; ///< The sound driver a stored in the configuration file. MusicDriver *_music_driver; ///< The currently active music driver. char *_ini_musicdriver; ///< The music driver a stored in the configuration file. char *_ini_blitter; ///< The blitter as stored in the configuration file. bool _blitter_autodetected; ///< Was the blitter autodetected or specified by the user? /** * Get a string parameter the list of parameters. * @param parm The parameters. * @param name The parameter name we're looking for. * @return The parameter value. */ const char *GetDriverParam(const char * const *parm, const char *name) { size_t len; if (parm == NULL) return NULL; len = strlen(name); for (; *parm != NULL; parm++) { const char *p = *parm; if (strncmp(p, name, len) == 0) { if (p[len] == '=') return p + len + 1; if (p[len] == '\0') return p + len; } } return NULL; } /** * Get a boolean parameter the list of parameters. * @param parm The parameters. * @param name The parameter name we're looking for. * @return The parameter value. */ bool GetDriverParamBool(const char * const *parm, const char *name) { return GetDriverParam(parm, name) != NULL; } /** * Get an integer parameter the list of parameters. * @param parm The parameters. * @param name The parameter name we're looking for. * @param def The default value if the parameter doesn't exist. * @return The parameter value. */ int GetDriverParamInt(const char * const *parm, const char *name, int def) { const char *p = GetDriverParam(parm, name); return p != NULL ? atoi(p) : def; } /** * Find the requested driver and return its class. * @param name the driver to select. * @param type the type of driver to select * @post Sets the driver so GetCurrentDriver() returns it too. */ Driver *DriverFactoryBase::SelectDriver(const char *name, Driver::Type type) { if (GetDrivers().size() == 0) return NULL; if (StrEmpty(name)) { /* Probe for this driver, but do not fall back to dedicated/null! */ for (int priority = 10; priority > 0; priority--) { Drivers::iterator it = GetDrivers().begin(); for (; it != GetDrivers().end(); ++it) { DriverFactoryBase *d = (*it).second; /* Check driver type */ if (d->type != type) continue; if (d->priority != priority) continue; Driver *newd = d->CreateInstance(); const char *err = newd->Start(NULL); if (err == NULL) { DEBUG(driver, 1, "Successfully probed %s driver '%s'", GetDriverTypeName(type), d->name); delete *GetActiveDriver(type); *GetActiveDriver(type) = newd; return newd; } DEBUG(driver, 1, "Probing %s driver '%s' failed with error: %s", GetDriverTypeName(type), d->name, err); delete newd; } } usererror("Couldn't find any suitable %s driver", GetDriverTypeName(type)); } else { char *parm; char buffer[256]; const char *parms[32]; /* Extract the driver name and put parameter list in parm */ strecpy(buffer, name, lastof(buffer)); parm = strchr(buffer, ':'); parms[0] = NULL; if (parm != NULL) { uint np = 0; /* Tokenize the parm. */ do { *parm++ = '\0'; if (np < lengthof(parms) - 1) parms[np++] = parm; while (*parm != '\0' && *parm != ',') parm++; } while (*parm == ','); parms[np] = NULL; } /* Find this driver */ Drivers::iterator it = GetDrivers().begin(); for (; it != GetDrivers().end(); ++it) { DriverFactoryBase *d = (*it).second; /* Check driver type */ if (d->type != type) continue; /* Check driver name */ if (strcasecmp(buffer, d->name) != 0) continue; /* Found our driver, let's try it */ Driver *newd = d->CreateInstance(); const char *err = newd->Start(parms); if (err != NULL) { delete newd; usererror("Unable to load driver '%s'. The error was: %s", d->name, err); } DEBUG(driver, 1, "Successfully loaded %s driver '%s'", GetDriverTypeName(type), d->name); delete *GetActiveDriver(type); *GetActiveDriver(type) = newd; return newd; } usererror("No such %s driver: %s\n", GetDriverTypeName(type), buffer); } } /** * Register a driver internally, based on its name. * @param name the name of the driver. * @param type the type of driver to register * @param priority the priority; how badly do we want this as default? * @note an assert() will be trigger if 2 driver with the same name try to register. */ void DriverFactoryBase::RegisterDriver(const char *name, Driver::Type type, int priority) { /* Don't register nameless Drivers */ if (name == NULL) return; this->name = strdup(name); this->type = type; this->priority = priority; /* Prefix the name with driver type to make it unique */ char buf[32]; strecpy(buf, GetDriverTypeName(type), lastof(buf)); strecpy(buf + 5, name, lastof(buf)); const char *longname = strdup(buf); std::pair<Drivers::iterator, bool> P = GetDrivers().insert(Drivers::value_type(longname, this)); assert(P.second); } /** * Build a human readable list of available drivers, grouped by type. * @param p The buffer to write to. * @param last The last element in the buffer. * @return The end of the written buffer. */ char *DriverFactoryBase::GetDriversInfo(char *p, const char *last) { for (Driver::Type type = Driver::DT_BEGIN; type != Driver::DT_END; type++) { p += seprintf(p, last, "List of %s drivers:\n", GetDriverTypeName(type)); for (int priority = 10; priority >= 0; priority--) { Drivers::iterator it = GetDrivers().begin(); for (; it != GetDrivers().end(); it++) { DriverFactoryBase *d = (*it).second; if (d->type != type) continue; if (d->priority != priority) continue; p += seprintf(p, last, "%18s: %s\n", d->name, d->GetDescription()); } } p += seprintf(p, last, "\n"); } return p; } /** * Frees memory used for this->name */ DriverFactoryBase::~DriverFactoryBase() { if (this->name == NULL) return; /* Prefix the name with driver type to make it unique */ char buf[32]; strecpy(buf, GetDriverTypeName(type), lastof(buf)); strecpy(buf + 5, this->name, lastof(buf)); Drivers::iterator it = GetDrivers().find(buf); assert(it != GetDrivers().end()); const char *longname = (*it).first; GetDrivers().erase(it); free(longname); if (GetDrivers().empty()) delete &GetDrivers(); free(this->name); }