src/client/renderingengine.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
   4 Copyright (C) 2017 nerzhul, Loic Blot <loic.blot@unix-experience.fr>
   5
   6 This program is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU Lesser General Public License as published by
   8 the Free Software Foundation; either version 2.1 of the License, or
   9 (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU Lesser General Public License for more details.
  15
  16 You should have received a copy of the GNU Lesser General Public License along
  17 with this program; if not, write to the Free Software Foundation, Inc.,
  18 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19 */
  20
  21 #include <IrrlichtDevice.h>
  22 #include <irrlicht.h>
  23 #include "fontengine.h"
  24 #include "client.h"
  25 #include "clouds.h"
  26 #include "util/numeric.h"
  27 #include "guiscalingfilter.h"
  28 #include "localplayer.h"
  29 #include "client/hud.h"
  30 #include "camera.h"
  31 #include "minimap.h"
  32 #include "clientmap.h"
  33 #include "renderingengine.h"
  34 #include "render/core.h"
  35 #include "render/factory.h"
  36 #include "inputhandler.h"
  37 #include "gettext.h"
  38 #include "../gui/guiSkin.h"
  39
  40 #if !defined(_WIN32) && !defined(__APPLE__) && !defined(__ANDROID__) &&                  \
  41                 !defined(SERVER) && !defined(__HAIKU__)
  42 #define XORG_USED
  43 #endif
  44 #ifdef XORG_USED
  45 #include <X11/Xlib.h>
  46 #include <X11/Xutil.h>
  47 #include <X11/Xatom.h>
  48 #endif
  49
  50 #ifdef _WIN32
  51 #include <windows.h>
  52 #include <winuser.h>
  53 #endif
  54
  55 #if ENABLE_GLES
  56 #include "filesys.h"
  57 #endif
  58
  59 RenderingEngine *RenderingEngine::s_singleton = nullptr;
  60
  61 static gui::GUISkin *createSkin(gui::IGUIEnvironment *environment,
  62                 gui::EGUI_SKIN_TYPE type, video::IVideoDriver *driver)
  63 {
  64         gui::GUISkin *skin = new gui::GUISkin(type, driver);
  65
  66         gui::IGUIFont *builtinfont = environment->getBuiltInFont();
  67         gui::IGUIFontBitmap *bitfont = nullptr;
  68         if (builtinfont && builtinfont->getType() == gui::EGFT_BITMAP)
  69                 bitfont = (gui::IGUIFontBitmap *)builtinfont;
  70
  71         gui::IGUISpriteBank *bank = 0;
  72         skin->setFont(builtinfont);
  73
  74         if (bitfont)
  75                 bank = bitfont->getSpriteBank();
  76
  77         skin->setSpriteBank(bank);
  78
  79         return skin;
  80 }
  81
  82 RenderingEngine::RenderingEngine(IEventReceiver *receiver)
  83 {
  84         sanity_check(!s_singleton);
  85
  86         // Resolution selection
  87         bool fullscreen = g_settings->getBool("fullscreen");
  88         u16 screen_w = g_settings->getU16("screen_w");
  89         u16 screen_h = g_settings->getU16("screen_h");
  90
  91         // bpp, fsaa, vsync
  92         bool vsync = g_settings->getBool("vsync");
  93         u16 bits = g_settings->getU16("fullscreen_bpp");
  94         u16 fsaa = g_settings->getU16("fsaa");
  95
  96         // stereo buffer required for pageflip stereo
  97         bool stereo_buffer = g_settings->get("3d_mode") == "pageflip";
  98
  99         // Determine driver
 100         video::E_DRIVER_TYPE driverType = video::EDT_OPENGL;
 101         const std::string &driverstring = g_settings->get("video_driver");
 102         std::vector<video::E_DRIVER_TYPE> drivers =
 103                         RenderingEngine::getSupportedVideoDrivers();
 104         u32 i;
 105         for (i = 0; i != drivers.size(); i++) {
 106                 if (!strcasecmp(driverstring.c_str(),
 107                                     RenderingEngine::getVideoDriverName(drivers[i]))) {
 108                         driverType = drivers[i];
 109                         break;
 110                 }
 111         }
 112         if (i == drivers.size()) {
 113                 errorstream << "Invalid video_driver specified; "
 114                                "defaulting to opengl"
 115                             << std::endl;
 116         }
 117
 118         SIrrlichtCreationParameters params = SIrrlichtCreationParameters();
 119         params.DriverType = driverType;
 120         params.WindowSize = core::dimension2d<u32>(screen_w, screen_h);
 121         params.Bits = bits;
 122         params.AntiAlias = fsaa;
 123         params.Fullscreen = fullscreen;
 124         params.Stencilbuffer = false;
 125         params.Stereobuffer = stereo_buffer;
 126         params.Vsync = vsync;
 127         params.EventReceiver = receiver;
 128         params.HighPrecisionFPU = g_settings->getBool("high_precision_fpu");
 129         params.ZBufferBits = 24;
 130 #ifdef __ANDROID__
 131         params.PrivateData = porting::app_global;
 132 #endif
 133 #if ENABLE_GLES
 134         // there is no standardized path for these on desktop
 135         std::string rel_path = std::string("client") + DIR_DELIM + "shaders" + DIR_DELIM +
 136                                "Irrlicht";
 137         params.OGLES2ShaderPath =
 138                         (porting::path_share + DIR_DELIM + rel_path + DIR_DELIM).c_str();
 139 #endif
 140
 141         m_device = createDeviceEx(params);
 142         driver = m_device->getVideoDriver();
 143
 144         s_singleton = this;
 145
 146         auto skin = createSkin(m_device->getGUIEnvironment(), gui::EGST_WINDOWS_METALLIC,
 147                         driver);
 148         m_device->getGUIEnvironment()->setSkin(skin);
 149         skin->drop();
 150 }
 151
 152 RenderingEngine::~RenderingEngine()
 153 {
 154         core.reset();
 155         m_device->drop();
 156         s_singleton = nullptr;
 157 }
 158
 159 v2u32 RenderingEngine::getWindowSize() const
 160 {
 161         if (core)
 162                 return core->getVirtualSize();
 163         return m_device->getVideoDriver()->getScreenSize();
 164 }
 165
 166 void RenderingEngine::setResizable(bool resize)
 167 {
 168         m_device->setResizable(resize);
 169 }
 170
 171 bool RenderingEngine::print_video_modes()
 172 {
 173         IrrlichtDevice *nulldevice;
 174
 175         bool vsync = g_settings->getBool("vsync");
 176         u16 fsaa = g_settings->getU16("fsaa");
 177         MyEventReceiver *receiver = new MyEventReceiver();
 178
 179         SIrrlichtCreationParameters params = SIrrlichtCreationParameters();
 180         params.DriverType = video::EDT_NULL;
 181         params.WindowSize = core::dimension2d<u32>(640, 480);
 182         params.Bits = 24;
 183         params.AntiAlias = fsaa;
 184         params.Fullscreen = false;
 185         params.Stencilbuffer = false;
 186         params.Vsync = vsync;
 187         params.EventReceiver = receiver;
 188         params.HighPrecisionFPU = g_settings->getBool("high_precision_fpu");
 189
 190         nulldevice = createDeviceEx(params);
 191
 192         if (!nulldevice) {
 193                 delete receiver;
 194                 return false;
 195         }
 196
 197         std::cout << _("Available video modes (WxHxD):") << std::endl;
 198
 199         video::IVideoModeList *videomode_list = nulldevice->getVideoModeList();
 200
 201         if (videomode_list != NULL) {
 202                 s32 videomode_count = videomode_list->getVideoModeCount();
 203                 core::dimension2d<u32> videomode_res;
 204                 s32 videomode_depth;
 205                 for (s32 i = 0; i < videomode_count; ++i) {
 206                         videomode_res = videomode_list->getVideoModeResolution(i);
 207                         videomode_depth = videomode_list->getVideoModeDepth(i);
 208                         std::cout << videomode_res.Width << "x" << videomode_res.Height
 209                                   << "x" << videomode_depth << std::endl;
 210                 }
 211
 212                 std::cout << _("Active video mode (WxHxD):") << std::endl;
 213                 videomode_res = videomode_list->getDesktopResolution();
 214                 videomode_depth = videomode_list->getDesktopDepth();
 215                 std::cout << videomode_res.Width << "x" << videomode_res.Height << "x"
 216                           << videomode_depth << std::endl;
 217         }
 218
 219         nulldevice->drop();
 220         delete receiver;
 221
 222         return videomode_list != NULL;
 223 }
 224
 225 bool RenderingEngine::setupTopLevelWindow(const std::string &name)
 226 {
 227         // FIXME: It would make more sense for there to be a switch of some
 228         // sort here that would call the correct toplevel setup methods for
 229         // the environment Minetest is running in.
 230
 231         /* Setting Xorg properties for the top level window */
 232         setupTopLevelXorgWindow(name);
 233
 234         /* Setting general properties for the top level window */
 235         verbosestream << "Client: Configuring general top level"
 236                       << " window properties" << std::endl;
 237         bool result = setWindowIcon();
 238
 239         return result;
 240 }
 241
 242 void RenderingEngine::setupTopLevelXorgWindow(const std::string &name)
 243 {
 244 #ifdef XORG_USED
 245         const video::SExposedVideoData exposedData = driver->getExposedVideoData();
 246
 247         Display *x11_dpl =
 248                         reinterpret_cast<Display *>(exposedData.OpenGLLinux.X11Display);
 249         if (x11_dpl == NULL) {
 250                 warningstream << "Client: Could not find X11 Display in ExposedVideoData"
 251                               << std::endl;
 252                 return;
 253         }
 254
 255         verbosestream << "Client: Configuring X11-specific top level"
 256                       << " window properties" << std::endl;
 257
 258         Window x11_win = reinterpret_cast<Window>(exposedData.OpenGLLinux.X11Window);
 259
 260         // Set application name and class hints. For now name and class are the same.
 261         XClassHint *classhint = XAllocClassHint();
 262         classhint->res_name = const_cast<char *>(name.c_str());
 263         classhint->res_class = const_cast<char *>(name.c_str());
 264
 265         XSetClassHint(x11_dpl, x11_win, classhint);
 266         XFree(classhint);
 267
 268         // FIXME: In the future WMNormalHints should be set ... e.g see the
 269         // gtk/gdk code (gdk/x11/gdksurface-x11.c) for the setup_top_level
 270         // method. But for now (as it would require some significant changes)
 271         // leave the code as is.
 272
 273         // The following is borrowed from the above gdk source for setting top
 274         // level windows. The source indicates and the Xlib docs suggest that
 275         // this will set the WM_CLIENT_MACHINE and WM_LOCAL_NAME. This will not
 276         // set the WM_CLIENT_MACHINE to a Fully Qualified Domain Name (FQDN) which is
 277         // required by the Extended Window Manager Hints (EWMH) spec when setting
 278         // the _NET_WM_PID (see further down) but running Minetest in an env
 279         // where the window manager is on another machine from Minetest (therefore
 280         // making the PID useless) is not expected to be a problem. Further
 281         // more, using gtk/gdk as the model it would seem that not using a FQDN is
 282         // not an issue for modern Xorg window managers.
 283
 284         verbosestream << "Client: Setting Xorg window manager Properties" << std::endl;
 285
 286         XSetWMProperties(x11_dpl, x11_win, NULL, NULL, NULL, 0, NULL, NULL, NULL);
 287
 288         // Set the _NET_WM_PID window property according to the EWMH spec. _NET_WM_PID
 289         // (in conjunction with WM_CLIENT_MACHINE) can be used by window managers to
 290         // force a shutdown of an application if it doesn't respond to the destroy
 291         // window message.
 292
 293         verbosestream << "Client: Setting Xorg _NET_WM_PID extened window manager "
 294                          "property"
 295                       << std::endl;
 296
 297         Atom NET_WM_PID = XInternAtom(x11_dpl, "_NET_WM_PID", false);
 298
 299         pid_t pid = getpid();
 300
 301         XChangeProperty(x11_dpl, x11_win, NET_WM_PID, XA_CARDINAL, 32, PropModeReplace,
 302                         reinterpret_cast<unsigned char *>(&pid), 1);
 303
 304         // Set the WM_CLIENT_LEADER window property here. Minetest has only one
 305         // window and that window will always be the leader.
 306
 307         verbosestream << "Client: Setting Xorg WM_CLIENT_LEADER property" << std::endl;
 308
 309         Atom WM_CLIENT_LEADER = XInternAtom(x11_dpl, "WM_CLIENT_LEADER", false);
 310
 311         XChangeProperty(x11_dpl, x11_win, WM_CLIENT_LEADER, XA_WINDOW, 32,
 312                         PropModeReplace, reinterpret_cast<unsigned char *>(&x11_win), 1);
 313 #endif
 314 }
 315
 316 #ifdef _WIN32
 317 static bool getWindowHandle(irr::video::IVideoDriver *driver, HWND &hWnd)
 318 {
 319         const video::SExposedVideoData exposedData = driver->getExposedVideoData();
 320
 321         switch (driver->getDriverType()) {
 322         case video::EDT_DIRECT3D8:
 323                 hWnd = reinterpret_cast<HWND>(exposedData.D3D8.HWnd);
 324                 break;
 325         case video::EDT_DIRECT3D9:
 326                 hWnd = reinterpret_cast<HWND>(exposedData.D3D9.HWnd);
 327                 break;
 328         case video::EDT_OPENGL:
 329                 hWnd = reinterpret_cast<HWND>(exposedData.OpenGLWin32.HWnd);
 330                 break;
 331         default:
 332                 return false;
 333         }
 334
 335         return true;
 336 }
 337 #endif
 338
 339 bool RenderingEngine::setWindowIcon()
 340 {
 341 #if defined(XORG_USED)
 342 #if RUN_IN_PLACE
 343         return setXorgWindowIconFromPath(
 344                         porting::path_share + "/misc/" PROJECT_NAME "-xorg-icon-128.png");
 345 #else
 346         // We have semi-support for reading in-place data if we are
 347         // compiled with RUN_IN_PLACE. Don't break with this and
 348         // also try the path_share location.
 349         return setXorgWindowIconFromPath(
 350                                ICON_DIR "/hicolor/128x128/apps/" PROJECT_NAME ".png") ||
 351                setXorgWindowIconFromPath(porting::path_share + "/misc/" PROJECT_NAME
 352                                                                "-xorg-icon-128.png");
 353 #endif
 354 #elif defined(_WIN32)
 355         HWND hWnd; // Window handle
 356         if (!getWindowHandle(driver, hWnd))
 357                 return false;
 358
 359         // Load the ICON from resource file
 360         const HICON hicon = LoadIcon(GetModuleHandle(NULL),
 361                         MAKEINTRESOURCE(130) // The ID of the ICON defined in
 362                                              // winresource.rc
 363         );
 364
 365         if (hicon) {
 366                 SendMessage(hWnd, WM_SETICON, ICON_BIG, reinterpret_cast<LPARAM>(hicon));
 367                 SendMessage(hWnd, WM_SETICON, ICON_SMALL,
 368                                 reinterpret_cast<LPARAM>(hicon));
 369                 return true;
 370         }
 371         return false;
 372 #else
 373         return false;
 374 #endif
 375 }
 376
 377 bool RenderingEngine::setXorgWindowIconFromPath(const std::string &icon_file)
 378 {
 379 #ifdef XORG_USED
 380
 381         video::IImageLoader *image_loader = NULL;
 382         u32 cnt = driver->getImageLoaderCount();
 383         for (u32 i = 0; i < cnt; i++) {
 384                 if (driver->getImageLoader(i)->isALoadableFileExtension(
 385                                     icon_file.c_str())) {
 386                         image_loader = driver->getImageLoader(i);
 387                         break;
 388                 }
 389         }
 390
 391         if (!image_loader) {
 392                 warningstream << "Could not find image loader for file '" << icon_file
 393                               << "'" << std::endl;
 394                 return false;
 395         }
 396
 397         io::IReadFile *icon_f =
 398                         m_device->getFileSystem()->createAndOpenFile(icon_file.c_str());
 399
 400         if (!icon_f) {
 401                 warningstream << "Could not load icon file '" << icon_file << "'"
 402                               << std::endl;
 403                 return false;
 404         }
 405
 406         video::IImage *img = image_loader->loadImage(icon_f);
 407
 408         if (!img) {
 409                 warningstream << "Could not load icon file '" << icon_file << "'"
 410                               << std::endl;
 411                 icon_f->drop();
 412                 return false;
 413         }
 414
 415         u32 height = img->getDimension().Height;
 416         u32 width = img->getDimension().Width;
 417
 418         size_t icon_buffer_len = 2 + height * width;
 419         long *icon_buffer = new long[icon_buffer_len];
 420
 421         icon_buffer[0] = width;
 422         icon_buffer[1] = height;
 423
 424         for (u32 x = 0; x < width; x++) {
 425                 for (u32 y = 0; y < height; y++) {
 426                         video::SColor col = img->getPixel(x, y);
 427                         long pixel_val = 0;
 428                         pixel_val |= (u8)col.getAlpha() << 24;
 429                         pixel_val |= (u8)col.getRed() << 16;
 430                         pixel_val |= (u8)col.getGreen() << 8;
 431                         pixel_val |= (u8)col.getBlue();
 432                         icon_buffer[2 + x + y * width] = pixel_val;
 433                 }
 434         }
 435
 436         img->drop();
 437         icon_f->drop();
 438
 439         const video::SExposedVideoData &video_data = driver->getExposedVideoData();
 440
 441         Display *x11_dpl = (Display *)video_data.OpenGLLinux.X11Display;
 442
 443         if (x11_dpl == NULL) {
 444                 warningstream << "Could not find x11 display for setting its icon."
 445                               << std::endl;
 446                 delete[] icon_buffer;
 447                 return false;
 448         }
 449
 450         Window x11_win = (Window)video_data.OpenGLLinux.X11Window;
 451
 452         Atom net_wm_icon = XInternAtom(x11_dpl, "_NET_WM_ICON", False);
 453         Atom cardinal = XInternAtom(x11_dpl, "CARDINAL", False);
 454         XChangeProperty(x11_dpl, x11_win, net_wm_icon, cardinal, 32, PropModeReplace,
 455                         (const unsigned char *)icon_buffer, icon_buffer_len);
 456
 457         delete[] icon_buffer;
 458
 459 #endif
 460         return true;
 461 }
 462
 463 /*
 464         Draws a screen with a single text on it.
 465         Text will be removed when the screen is drawn the next time.
 466         Additionally, a progressbar can be drawn when percent is set between 0 and 100.
 467 */
 468 void RenderingEngine::_draw_load_screen(const std::wstring &text,
 469                 gui::IGUIEnvironment *guienv, ITextureSource *tsrc, float dtime,
 470                 int percent, bool clouds)
 471 {
 472         v2u32 screensize = RenderingEngine::get_instance()->getWindowSize();
 473
 474         v2s32 textsize(g_fontengine->getTextWidth(text), g_fontengine->getLineHeight());
 475         v2s32 center(screensize.X / 2, screensize.Y / 2);
 476         core::rect<s32> textrect(center - textsize / 2, center + textsize / 2);
 477
 478         gui::IGUIStaticText *guitext =
 479                         guienv->addStaticText(text.c_str(), textrect, false, false);
 480         guitext->setTextAlignment(gui::EGUIA_CENTER, gui::EGUIA_UPPERLEFT);
 481
 482         bool cloud_menu_background = clouds && g_settings->getBool("menu_clouds");
 483         if (cloud_menu_background) {
 484                 g_menuclouds->step(dtime * 3);
 485                 g_menuclouds->render();
 486                 get_video_driver()->beginScene(
 487                                 true, true, video::SColor(255, 140, 186, 250));
 488                 g_menucloudsmgr->drawAll();
 489         } else
 490                 get_video_driver()->beginScene(true, true, video::SColor(255, 0, 0, 0));
 491
 492         // draw progress bar
 493         if ((percent >= 0) && (percent <= 100)) {
 494                 video::ITexture *progress_img = tsrc->getTexture("progress_bar.png");
 495                 video::ITexture *progress_img_bg =
 496                                 tsrc->getTexture("progress_bar_bg.png");
 497
 498                 if (progress_img && progress_img_bg) {
 499 #ifndef __ANDROID__
 500                         const core::dimension2d<u32> &img_size =
 501                                         progress_img_bg->getSize();
 502                         u32 imgW = rangelim(img_size.Width, 200, 600);
 503                         u32 imgH = rangelim(img_size.Height, 24, 72);
 504 #else
 505                         const core::dimension2d<u32> img_size(256, 48);
 506                         float imgRatio = (float)img_size.Height / img_size.Width;
 507                         u32 imgW = screensize.X / 2.2f;
 508                         u32 imgH = floor(imgW * imgRatio);
 509 #endif
 510                         v2s32 img_pos((screensize.X - imgW) / 2,
 511                                         (screensize.Y - imgH) / 2);
 512
 513                         draw2DImageFilterScaled(get_video_driver(), progress_img_bg,
 514                                         core::rect<s32>(img_pos.X, img_pos.Y,
 515                                                         img_pos.X + imgW,
 516                                                         img_pos.Y + imgH),
 517                                         core::rect<s32>(0, 0, img_size.Width,
 518                                                         img_size.Height),
 519                                         0, 0, true);
 520
 521                         draw2DImageFilterScaled(get_video_driver(), progress_img,
 522                                         core::rect<s32>(img_pos.X, img_pos.Y,
 523                                                         img_pos.X + (percent * imgW) / 100,
 524                                                         img_pos.Y + imgH),
 525                                         core::rect<s32>(0, 0,
 526                                                         (percent * img_size.Width) / 100,
 527                                                         img_size.Height),
 528                                         0, 0, true);
 529                 }
 530         }
 531
 532         guienv->drawAll();
 533         get_video_driver()->endScene();
 534         guitext->remove();
 535 }
 536
 537 /*
 538         Draws the menu scene including (optional) cloud background.
 539 */
 540 void RenderingEngine::_draw_menu_scene(
 541                 gui::IGUIEnvironment *guienv, float dtime, bool clouds)
 542 {
 543         bool cloud_menu_background = clouds && g_settings->getBool("menu_clouds");
 544         if (cloud_menu_background) {
 545                 g_menuclouds->step(dtime * 3);
 546                 g_menuclouds->render();
 547                 get_video_driver()->beginScene(
 548                                 true, true, video::SColor(255, 140, 186, 250));
 549                 g_menucloudsmgr->drawAll();
 550         } else
 551                 get_video_driver()->beginScene(true, true, video::SColor(255, 0, 0, 0));
 552
 553         guienv->drawAll();
 554         get_video_driver()->endScene();
 555 }
 556
 557 std::vector<core::vector3d<u32>> RenderingEngine::getSupportedVideoModes()
 558 {
 559         IrrlichtDevice *nulldevice = createDevice(video::EDT_NULL);
 560         sanity_check(nulldevice);
 561
 562         std::vector<core::vector3d<u32>> mlist;
 563         video::IVideoModeList *modelist = nulldevice->getVideoModeList();
 564
 565         s32 num_modes = modelist->getVideoModeCount();
 566         for (s32 i = 0; i != num_modes; i++) {
 567                 core::dimension2d<u32> mode_res = modelist->getVideoModeResolution(i);
 568                 u32 mode_depth = (u32)modelist->getVideoModeDepth(i);
 569                 mlist.emplace_back(mode_res.Width, mode_res.Height, mode_depth);
 570         }
 571
 572         nulldevice->drop();
 573         return mlist;
 574 }
 575
 576 std::vector<irr::video::E_DRIVER_TYPE> RenderingEngine::getSupportedVideoDrivers()
 577 {
 578         std::vector<irr::video::E_DRIVER_TYPE> drivers;
 579
 580         for (int i = 0; i != irr::video::EDT_COUNT; i++) {
 581                 if (irr::IrrlichtDevice::isDriverSupported((irr::video::E_DRIVER_TYPE)i))
 582                         drivers.push_back((irr::video::E_DRIVER_TYPE)i);
 583         }
 584
 585         return drivers;
 586 }
 587
 588 void RenderingEngine::_initialize(Client *client, Hud *hud)
 589 {
 590         const std::string &draw_mode = g_settings->get("3d_mode");
 591         core.reset(createRenderingCore(draw_mode, m_device, client, hud));
 592         core->initialize();
 593 }
 594
 595 void RenderingEngine::_finalize()
 596 {
 597         core.reset();
 598 }
 599
 600 void RenderingEngine::_draw_scene(video::SColor skycolor, bool show_hud,
 601                 bool show_minimap, bool draw_wield_tool, bool draw_crosshair,
 602                 bool draw_tracers, bool draw_esp)
 603 {
 604         core->draw(skycolor, show_hud, show_minimap, draw_wield_tool, draw_crosshair,
 605                         draw_tracers, draw_esp);
 606 }
 607
 608 const char *RenderingEngine::getVideoDriverName(irr::video::E_DRIVER_TYPE type)
 609 {
 610         static const char *driver_ids[] = {
 611                         "null",
 612                         "software",
 613                         "burningsvideo",
 614                         "direct3d8",
 615                         "direct3d9",
 616                         "opengl",
 617                         "ogles1",
 618                         "ogles2",
 619         };
 620
 621         return driver_ids[type];
 622 }
 623
 624 const char *RenderingEngine::getVideoDriverFriendlyName(irr::video::E_DRIVER_TYPE type)
 625 {
 626         static const char *driver_names[] = {
 627                         "NULL Driver",
 628                         "Software Renderer",
 629                         "Burning's Video",
 630                         "Direct3D 8",
 631                         "Direct3D 9",
 632                         "OpenGL",
 633                         "OpenGL ES1",
 634                         "OpenGL ES2",
 635         };
 636
 637         return driver_names[type];
 638 }
 639
 640 #ifndef __ANDROID__
 641 #if defined(XORG_USED)
 642
 643 static float calcDisplayDensity()
 644 {
 645         const char *current_display = getenv("DISPLAY");
 646
 647         if (current_display != NULL) {
 648                 Display *x11display = XOpenDisplay(current_display);
 649
 650                 if (x11display != NULL) {
 651                         /* try x direct */
 652                         int dh = DisplayHeight(x11display, 0);
 653                         int dw = DisplayWidth(x11display, 0);
 654                         int dh_mm = DisplayHeightMM(x11display, 0);
 655                         int dw_mm = DisplayWidthMM(x11display, 0);
 656                         XCloseDisplay(x11display);
 657
 658                         if (dh_mm != 0 && dw_mm != 0) {
 659                                 float dpi_height = floor(dh / (dh_mm * 0.039370) + 0.5);
 660                                 float dpi_width = floor(dw / (dw_mm * 0.039370) + 0.5);
 661                                 return std::max(dpi_height, dpi_width) / 96.0;
 662                         }
 663                 }
 664         }
 665
 666         /* return manually specified dpi */
 667         return g_settings->getFloat("screen_dpi") / 96.0;
 668 }
 669
 670 float RenderingEngine::getDisplayDensity()
 671 {
 672         static float cached_display_density = calcDisplayDensity();
 673         return cached_display_density;
 674 }
 675
 676 #elif defined(_WIN32)
 677
 678 static float calcDisplayDensity(irr::video::IVideoDriver *driver)
 679 {
 680         HWND hWnd;
 681         if (getWindowHandle(driver, hWnd)) {
 682                 HDC hdc = GetDC(hWnd);
 683                 float dpi = GetDeviceCaps(hdc, LOGPIXELSX);
 684                 ReleaseDC(hWnd, hdc);
 685                 return dpi / 96.0f;
 686         }
 687
 688         /* return manually specified dpi */
 689         return g_settings->getFloat("screen_dpi") / 96.0f;
 690 }
 691
 692 float RenderingEngine::getDisplayDensity()
 693 {
 694         static bool cached = false;
 695         static float display_density;
 696         if (!cached) {
 697                 display_density = calcDisplayDensity(get_video_driver());
 698                 cached = true;
 699         }
 700         return display_density;
 701 }
 702
 703 #else
 704
 705 float RenderingEngine::getDisplayDensity()
 706 {
 707         return g_settings->getFloat("screen_dpi") / 96.0;
 708 }
 709
 710 #endif
 711
 712 v2u32 RenderingEngine::getDisplaySize()
 713 {
 714         IrrlichtDevice *nulldevice = createDevice(video::EDT_NULL);
 715
 716         core::dimension2d<u32> deskres =
 717                         nulldevice->getVideoModeList()->getDesktopResolution();
 718         nulldevice->drop();
 719
 720         return deskres;
 721 }
 722
 723 #else  // __ANDROID__
 724 float RenderingEngine::getDisplayDensity()
 725 {
 726         return porting::getDisplayDensity();
 727 }
 728
 729 v2u32 RenderingEngine::getDisplaySize()
 730 {
 731         return porting::getDisplaySize();
 732 }
 733 #endif // __ANDROID__