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
  49 #endif
  50
  51 #if ENABLE_GLES
  52 #include "filesys.h"
  53 #endif
  54
  55 RenderingEngine *RenderingEngine::s_singleton = nullptr;
  56
  57
  58 static gui::GUISkin *createSkin(gui::IGUIEnvironment *environment,
  59                 gui::EGUI_SKIN_TYPE type, video::IVideoDriver *driver)
  60 {
  61         gui::GUISkin *skin = new gui::GUISkin(type, driver);
  62
  63         gui::IGUIFont *builtinfont = environment->getBuiltInFont();
  64         gui::IGUIFontBitmap *bitfont = nullptr;
  65         if (builtinfont && builtinfont->getType() == gui::EGFT_BITMAP)
  66                 bitfont = (gui::IGUIFontBitmap*)builtinfont;
  67
  68         gui::IGUISpriteBank *bank = 0;
  69         skin->setFont(builtinfont);
  70
  71         if (bitfont)
  72                 bank = bitfont->getSpriteBank();
  73
  74         skin->setSpriteBank(bank);
  75
  76         return skin;
  77 }
  78
  79
  80 RenderingEngine::RenderingEngine(IEventReceiver *receiver)
  81 {
  82         sanity_check(!s_singleton);
  83
  84         // Resolution selection
  85         bool fullscreen = g_settings->getBool("fullscreen");
  86         u16 screen_w = g_settings->getU16("screen_w");
  87         u16 screen_h = g_settings->getU16("screen_h");
  88
  89         // bpp, fsaa, vsync
  90         bool vsync = g_settings->getBool("vsync");
  91         u16 bits = g_settings->getU16("fullscreen_bpp");
  92         u16 fsaa = g_settings->getU16("fsaa");
  93
  94         // stereo buffer required for pageflip stereo
  95         bool stereo_buffer = g_settings->get("3d_mode") == "pageflip";
  96
  97         // Determine driver
  98         video::E_DRIVER_TYPE driverType = video::EDT_OPENGL;
  99         const std::string &driverstring = g_settings->get("video_driver");
 100         std::vector<video::E_DRIVER_TYPE> drivers =
 101                         RenderingEngine::getSupportedVideoDrivers();
 102         u32 i;
 103         for (i = 0; i != drivers.size(); i++) {
 104                 if (!strcasecmp(driverstring.c_str(),
 105                                 RenderingEngine::getVideoDriverName(drivers[i]))) {
 106                         driverType = drivers[i];
 107                         break;
 108                 }
 109         }
 110         if (i == drivers.size()) {
 111                 errorstream << "Invalid video_driver specified; "
 112                                "defaulting to opengl"
 113                             << std::endl;
 114         }
 115
 116         SIrrlichtCreationParameters params = SIrrlichtCreationParameters();
 117         params.DriverType = driverType;
 118         params.WindowSize = core::dimension2d<u32>(screen_w, screen_h);
 119         params.Bits = bits;
 120         params.AntiAlias = fsaa;
 121         params.Fullscreen = fullscreen;
 122         params.Stencilbuffer = false;
 123         params.Stereobuffer = stereo_buffer;
 124         params.Vsync = vsync;
 125         params.EventReceiver = receiver;
 126         params.HighPrecisionFPU = g_settings->getBool("high_precision_fpu");
 127         params.ZBufferBits = 24;
 128 #ifdef __ANDROID__
 129         // clang-format off
 130         params.PrivateData = porting::app_global;
 131         params.OGLES2ShaderPath = std::string(porting::path_user + DIR_DELIM + "media" +
 132                 DIR_DELIM + "Shaders" + DIR_DELIM).c_str();
 133         // clang-format on
 134 #elif ENABLE_GLES
 135         // there is no standardized path for these on desktop
 136         std::string rel_path = std::string("client") + DIR_DELIM
 137                         + "shaders" + DIR_DELIM + "Irrlicht";
 138         params.OGLES2ShaderPath = (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(),
 147                         gui::EGST_WINDOWS_METALLIC, 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 but for now not deviating
 230         // from the original pattern.
 231
 232         /* Setting Xorg properties for the top level window */
 233         setupTopLevelXorgWindow(name);
 234         /* Done with Xorg properties */
 235
 236         /* Setting general properties for the top level window */
 237         verbosestream << "Client: Configuring general top level"
 238                 << " window properties"
 239                 << std::endl;
 240
 241         bool result = setWindowIcon();
 242
 243         verbosestream << "Client: Finished configuring general top level"
 244                 << " window properties"
 245                 << std::endl;
 246         /* Done with general properties */
 247
 248         // FIXME: setWindowIcon returns a bool result but it is unused.
 249         // For now continue to return this result.
 250         return result;
 251 }
 252
 253 void RenderingEngine::setupTopLevelXorgWindow(const std::string &name)
 254 {
 255 #ifdef XORG_USED
 256         const video::SExposedVideoData exposedData = driver->getExposedVideoData();
 257
 258         Display *x11_dpl = reinterpret_cast<Display *>(exposedData.OpenGLLinux.X11Display);
 259         if (x11_dpl == NULL) {
 260                 warningstream << "Client: Could not find X11 Display in ExposedVideoData"
 261                         << std::endl;
 262                 return;
 263         }
 264
 265         verbosestream << "Client: Configuring Xorg specific top level"
 266                 << " window properties"
 267                 << std::endl;
 268
 269
 270         Window x11_win = reinterpret_cast<Window>(exposedData.OpenGLLinux.X11Window);
 271
 272         // Set application name and class hints. For now name and class are the same.
 273         XClassHint *classhint = XAllocClassHint();
 274         classhint->res_name = const_cast<char *>(name.c_str());
 275         classhint->res_class = const_cast<char *>(name.c_str());
 276
 277         XSetClassHint(x11_dpl, x11_win, classhint);
 278         XFree(classhint);
 279
 280         // FIXME: In the future WMNormalHints should be set ... e.g see the
 281         // gtk/gdk code (gdk/x11/gdksurface-x11.c) for the setup_top_level
 282         // method. But for now (as it would require some significant changes)
 283         // leave the code as is.
 284
 285         // The following is borrowed from the above gdk source for setting top
 286         // level windows. The source indicates and the Xlib docs suggest that
 287         // this will set the WM_CLIENT_MACHINE and WM_LOCAL_NAME. This will not
 288         // set the WM_CLIENT_MACHINE to a Fully Qualified Domain Name (FQDN) which is
 289         // required by the Extended Window Manager Hints (EWMH) spec when setting
 290         // the _NET_WM_PID (see further down) but running Minetest in an env
 291         // where the window manager is on another machine from Minetest (therefore
 292         // making the PID useless) is not expected to be a problem. Further
 293         // more, using gtk/gdk as the model it would seem that not using a FQDN is
 294         // not an issue for modern Xorg window managers.
 295
 296         verbosestream << "Client: Setting Xorg window manager Properties"
 297                 << std::endl;
 298
 299         XSetWMProperties (x11_dpl, x11_win, NULL, NULL, NULL, 0, NULL, NULL, NULL);
 300
 301         // Set the _NET_WM_PID window property according to the EWMH spec. _NET_WM_PID
 302         // (in conjunction with WM_CLIENT_MACHINE) can be used by window managers to
 303         // force a shutdown of an application if it doesn't respond to the destroy
 304         // window message.
 305
 306         verbosestream << "Client: Setting Xorg _NET_WM_PID extened window manager property"
 307                 << std::endl;
 308
 309         Atom NET_WM_PID = XInternAtom(x11_dpl, "_NET_WM_PID", false);
 310
 311         pid_t pid = getpid();
 312         infostream << "Client: PID is '" << static_cast<long>(pid) << "'"
 313                 << std::endl;
 314
 315         XChangeProperty(x11_dpl, x11_win, NET_WM_PID,
 316                         XA_CARDINAL, 32, PropModeReplace,
 317                         reinterpret_cast<unsigned char *>(&pid),1);
 318
 319         // Set the WM_CLIENT_LEADER window property here. Minetest has only one
 320         // window and that window will always be the leader.
 321
 322         verbosestream << "Client: Setting Xorg WM_CLIENT_LEADER property"
 323                 << std::endl;
 324
 325         Atom WM_CLIENT_LEADER = XInternAtom(x11_dpl, "WM_CLIENT_LEADER", false);
 326
 327         XChangeProperty (x11_dpl, x11_win, WM_CLIENT_LEADER,
 328                 XA_WINDOW, 32, PropModeReplace,
 329                 reinterpret_cast<unsigned char *>(&x11_win), 1);
 330
 331         verbosestream << "Client: Finished configuring Xorg specific top level"
 332                 << " window properties"
 333                 << std::endl;
 334 #endif
 335 }
 336
 337
 338 bool RenderingEngine::setWindowIcon()
 339 {
 340 #if defined(XORG_USED)
 341 #if RUN_IN_PLACE
 342         return setXorgWindowIconFromPath(
 343                         porting::path_share + "/misc/" PROJECT_NAME "-xorg-icon-128.png");
 344 #else
 345         // We have semi-support for reading in-place data if we are
 346         // compiled with RUN_IN_PLACE. Don't break with this and
 347         // also try the path_share location.
 348         return setXorgWindowIconFromPath(
 349                                ICON_DIR "/hicolor/128x128/apps/" PROJECT_NAME ".png") ||
 350                setXorgWindowIconFromPath(porting::path_share + "/misc/" PROJECT_NAME
 351                                                                "-xorg-icon-128.png");
 352 #endif
 353 #elif defined(_WIN32)
 354         const video::SExposedVideoData exposedData = driver->getExposedVideoData();
 355         HWND hWnd; // Window handle
 356
 357         switch (driver->getDriverType()) {
 358         case video::EDT_DIRECT3D8:
 359                 hWnd = reinterpret_cast<HWND>(exposedData.D3D8.HWnd);
 360                 break;
 361         case video::EDT_DIRECT3D9:
 362                 hWnd = reinterpret_cast<HWND>(exposedData.D3D9.HWnd);
 363                 break;
 364         case video::EDT_OPENGL:
 365                 hWnd = reinterpret_cast<HWND>(exposedData.OpenGLWin32.HWnd);
 366                 break;
 367         default:
 368                 return false;
 369         }
 370
 371         // Load the ICON from resource file
 372         const HICON hicon = LoadIcon(GetModuleHandle(NULL),
 373                         MAKEINTRESOURCE(130) // The ID of the ICON defined in
 374                                              // winresource.rc
 375         );
 376
 377         if (hicon) {
 378                 SendMessage(hWnd, WM_SETICON, ICON_BIG, reinterpret_cast<LPARAM>(hicon));
 379                 SendMessage(hWnd, WM_SETICON, ICON_SMALL,
 380                                 reinterpret_cast<LPARAM>(hicon));
 381                 return true;
 382         }
 383         return false;
 384 #else
 385         return false;
 386 #endif
 387 }
 388
 389 bool RenderingEngine::setXorgWindowIconFromPath(const std::string &icon_file)
 390 {
 391 #ifdef XORG_USED
 392
 393         video::IImageLoader *image_loader = NULL;
 394         u32 cnt = driver->getImageLoaderCount();
 395         for (u32 i = 0; i < cnt; i++) {
 396                 if (driver->getImageLoader(i)->isALoadableFileExtension(
 397                                     icon_file.c_str())) {
 398                         image_loader = driver->getImageLoader(i);
 399                         break;
 400                 }
 401         }
 402
 403         if (!image_loader) {
 404                 warningstream << "Could not find image loader for file '" << icon_file
 405                               << "'" << std::endl;
 406                 return false;
 407         }
 408
 409         io::IReadFile *icon_f =
 410                         m_device->getFileSystem()->createAndOpenFile(icon_file.c_str());
 411
 412         if (!icon_f) {
 413                 warningstream << "Could not load icon file '" << icon_file << "'"
 414                               << std::endl;
 415                 return false;
 416         }
 417
 418         video::IImage *img = image_loader->loadImage(icon_f);
 419
 420         if (!img) {
 421                 warningstream << "Could not load icon file '" << icon_file << "'"
 422                               << std::endl;
 423                 icon_f->drop();
 424                 return false;
 425         }
 426
 427         u32 height = img->getDimension().Height;
 428         u32 width = img->getDimension().Width;
 429
 430         size_t icon_buffer_len = 2 + height * width;
 431         long *icon_buffer = new long[icon_buffer_len];
 432
 433         icon_buffer[0] = width;
 434         icon_buffer[1] = height;
 435
 436         for (u32 x = 0; x < width; x++) {
 437                 for (u32 y = 0; y < height; y++) {
 438                         video::SColor col = img->getPixel(x, y);
 439                         long pixel_val = 0;
 440                         pixel_val |= (u8)col.getAlpha() << 24;
 441                         pixel_val |= (u8)col.getRed() << 16;
 442                         pixel_val |= (u8)col.getGreen() << 8;
 443                         pixel_val |= (u8)col.getBlue();
 444                         icon_buffer[2 + x + y * width] = pixel_val;
 445                 }
 446         }
 447
 448         img->drop();
 449         icon_f->drop();
 450
 451         const video::SExposedVideoData &video_data = driver->getExposedVideoData();
 452
 453         Display *x11_dpl = (Display *)video_data.OpenGLLinux.X11Display;
 454
 455         if (x11_dpl == NULL) {
 456                 warningstream << "Could not find x11 display for setting its icon."
 457                               << std::endl;
 458                 delete[] icon_buffer;
 459                 return false;
 460         }
 461
 462         Window x11_win = (Window)video_data.OpenGLLinux.X11Window;
 463
 464         Atom net_wm_icon = XInternAtom(x11_dpl, "_NET_WM_ICON", False);
 465         Atom cardinal = XInternAtom(x11_dpl, "CARDINAL", False);
 466         XChangeProperty(x11_dpl, x11_win, net_wm_icon, cardinal, 32, PropModeReplace,
 467                         (const unsigned char *)icon_buffer, icon_buffer_len);
 468
 469         delete[] icon_buffer;
 470
 471 #endif
 472         return true;
 473 }
 474
 475 /*
 476         Draws a screen with a single text on it.
 477         Text will be removed when the screen is drawn the next time.
 478         Additionally, a progressbar can be drawn when percent is set between 0 and 100.
 479 */
 480 void RenderingEngine::_draw_load_screen(const std::wstring &text,
 481                 gui::IGUIEnvironment *guienv, ITextureSource *tsrc, float dtime,
 482                 int percent, bool clouds)
 483 {
 484         v2u32 screensize = RenderingEngine::get_instance()->getWindowSize();
 485
 486         v2s32 textsize(g_fontengine->getTextWidth(text), g_fontengine->getLineHeight());
 487         v2s32 center(screensize.X / 2, screensize.Y / 2);
 488         core::rect<s32> textrect(center - textsize / 2, center + textsize / 2);
 489
 490         gui::IGUIStaticText *guitext =
 491                         guienv->addStaticText(text.c_str(), textrect, false, false);
 492         guitext->setTextAlignment(gui::EGUIA_CENTER, gui::EGUIA_UPPERLEFT);
 493
 494         bool cloud_menu_background = clouds && g_settings->getBool("menu_clouds");
 495         if (cloud_menu_background) {
 496                 g_menuclouds->step(dtime * 3);
 497                 g_menuclouds->render();
 498                 get_video_driver()->beginScene(
 499                                 true, true, video::SColor(255, 140, 186, 250));
 500                 g_menucloudsmgr->drawAll();
 501         } else
 502                 get_video_driver()->beginScene(true, true, video::SColor(255, 0, 0, 0));
 503
 504         // draw progress bar
 505         if ((percent >= 0) && (percent <= 100)) {
 506                 video::ITexture *progress_img = tsrc->getTexture("progress_bar.png");
 507                 video::ITexture *progress_img_bg =
 508                                 tsrc->getTexture("progress_bar_bg.png");
 509
 510                 if (progress_img && progress_img_bg) {
 511 #ifndef __ANDROID__
 512                         const core::dimension2d<u32> &img_size =
 513                                         progress_img_bg->getSize();
 514                         u32 imgW = rangelim(img_size.Width, 200, 600);
 515                         u32 imgH = rangelim(img_size.Height, 24, 72);
 516 #else
 517                         const core::dimension2d<u32> img_size(256, 48);
 518                         float imgRatio = (float)img_size.Height / img_size.Width;
 519                         u32 imgW = screensize.X / 2.2f;
 520                         u32 imgH = floor(imgW * imgRatio);
 521 #endif
 522                         v2s32 img_pos((screensize.X - imgW) / 2,
 523                                         (screensize.Y - imgH) / 2);
 524
 525                         draw2DImageFilterScaled(get_video_driver(), progress_img_bg,
 526                                         core::rect<s32>(img_pos.X, img_pos.Y,
 527                                                         img_pos.X + imgW,
 528                                                         img_pos.Y + imgH),
 529                                         core::rect<s32>(0, 0, img_size.Width,
 530                                                         img_size.Height),
 531                                         0, 0, true);
 532
 533                         draw2DImageFilterScaled(get_video_driver(), progress_img,
 534                                         core::rect<s32>(img_pos.X, img_pos.Y,
 535                                                         img_pos.X + (percent * imgW) / 100,
 536                                                         img_pos.Y + imgH),
 537                                         core::rect<s32>(0, 0,
 538                                                         (percent * img_size.Width) / 100,
 539                                                         img_size.Height),
 540                                         0, 0, true);
 541                 }
 542         }
 543
 544         guienv->drawAll();
 545         get_video_driver()->endScene();
 546         guitext->remove();
 547 }
 548
 549 /*
 550         Draws the menu scene including (optional) cloud background.
 551 */
 552 void RenderingEngine::_draw_menu_scene(gui::IGUIEnvironment *guienv,
 553                 float dtime, bool clouds)
 554 {
 555         bool cloud_menu_background = clouds && g_settings->getBool("menu_clouds");
 556         if (cloud_menu_background) {
 557                 g_menuclouds->step(dtime * 3);
 558                 g_menuclouds->render();
 559                 get_video_driver()->beginScene(
 560                                 true, true, video::SColor(255, 140, 186, 250));
 561                 g_menucloudsmgr->drawAll();
 562         } else
 563                 get_video_driver()->beginScene(true, true, video::SColor(255, 0, 0, 0));
 564
 565         guienv->drawAll();
 566         get_video_driver()->endScene();
 567 }
 568
 569 std::vector<core::vector3d<u32>> RenderingEngine::getSupportedVideoModes()
 570 {
 571         IrrlichtDevice *nulldevice = createDevice(video::EDT_NULL);
 572         sanity_check(nulldevice);
 573
 574         std::vector<core::vector3d<u32>> mlist;
 575         video::IVideoModeList *modelist = nulldevice->getVideoModeList();
 576
 577         s32 num_modes = modelist->getVideoModeCount();
 578         for (s32 i = 0; i != num_modes; i++) {
 579                 core::dimension2d<u32> mode_res = modelist->getVideoModeResolution(i);
 580                 u32 mode_depth = (u32)modelist->getVideoModeDepth(i);
 581                 mlist.emplace_back(mode_res.Width, mode_res.Height, mode_depth);
 582         }
 583
 584         nulldevice->drop();
 585         return mlist;
 586 }
 587
 588 std::vector<irr::video::E_DRIVER_TYPE> RenderingEngine::getSupportedVideoDrivers()
 589 {
 590         std::vector<irr::video::E_DRIVER_TYPE> drivers;
 591
 592         for (int i = 0; i != irr::video::EDT_COUNT; i++) {
 593                 if (irr::IrrlichtDevice::isDriverSupported((irr::video::E_DRIVER_TYPE)i))
 594                         drivers.push_back((irr::video::E_DRIVER_TYPE)i);
 595         }
 596
 597         return drivers;
 598 }
 599
 600 void RenderingEngine::_initialize(Client *client, Hud *hud)
 601 {
 602         const std::string &draw_mode = g_settings->get("3d_mode");
 603         core.reset(createRenderingCore(draw_mode, m_device, client, hud));
 604         core->initialize();
 605 }
 606
 607 void RenderingEngine::_finalize()
 608 {
 609         core.reset();
 610 }
 611
 612 void RenderingEngine::_draw_scene(video::SColor skycolor, bool show_hud,
 613                 bool show_minimap, bool draw_wield_tool, bool draw_crosshair)
 614 {
 615         core->draw(skycolor, show_hud, show_minimap, draw_wield_tool, draw_crosshair);
 616 }
 617
 618 const char *RenderingEngine::getVideoDriverName(irr::video::E_DRIVER_TYPE type)
 619 {
 620         static const char *driver_ids[] = {
 621                         "null",
 622                         "software",
 623                         "burningsvideo",
 624                         "direct3d8",
 625                         "direct3d9",
 626                         "opengl",
 627                         "ogles1",
 628                         "ogles2",
 629         };
 630
 631         return driver_ids[type];
 632 }
 633
 634 const char *RenderingEngine::getVideoDriverFriendlyName(irr::video::E_DRIVER_TYPE type)
 635 {
 636         static const char *driver_names[] = {
 637                         "NULL Driver",
 638                         "Software Renderer",
 639                         "Burning's Video",
 640                         "Direct3D 8",
 641                         "Direct3D 9",
 642                         "OpenGL",
 643                         "OpenGL ES1",
 644                         "OpenGL ES2",
 645         };
 646
 647         return driver_names[type];
 648 }
 649
 650 #ifndef __ANDROID__
 651 #ifdef XORG_USED
 652
 653 static float calcDisplayDensity()
 654 {
 655         const char *current_display = getenv("DISPLAY");
 656
 657         if (current_display != NULL) {
 658                 Display *x11display = XOpenDisplay(current_display);
 659
 660                 if (x11display != NULL) {
 661                         /* try x direct */
 662                         int dh = DisplayHeight(x11display, 0);
 663                         int dw = DisplayWidth(x11display, 0);
 664                         int dh_mm = DisplayHeightMM(x11display, 0);
 665                         int dw_mm = DisplayWidthMM(x11display, 0);
 666                         XCloseDisplay(x11display);
 667
 668                         if (dh_mm != 0 && dw_mm != 0) {
 669                                 float dpi_height = floor(dh / (dh_mm * 0.039370) + 0.5);
 670                                 float dpi_width = floor(dw / (dw_mm * 0.039370) + 0.5);
 671                                 return std::max(dpi_height, dpi_width) / 96.0;
 672                         }
 673                 }
 674         }
 675
 676         /* return manually specified dpi */
 677         return g_settings->getFloat("screen_dpi") / 96.0;
 678 }
 679
 680 float RenderingEngine::getDisplayDensity()
 681 {
 682         static float cached_display_density = calcDisplayDensity();
 683         return cached_display_density;
 684 }
 685
 686 #else  // XORG_USED
 687 float RenderingEngine::getDisplayDensity()
 688 {
 689         return g_settings->getFloat("screen_dpi") / 96.0;
 690 }
 691 #endif // XORG_USED
 692
 693 v2u32 RenderingEngine::getDisplaySize()
 694 {
 695         IrrlichtDevice *nulldevice = createDevice(video::EDT_NULL);
 696
 697         core::dimension2d<u32> deskres =
 698                         nulldevice->getVideoModeList()->getDesktopResolution();
 699         nulldevice->drop();
 700
 701         return deskres;
 702 }
 703
 704 #else // __ANDROID__
 705 float RenderingEngine::getDisplayDensity()
 706 {
 707         return porting::getDisplayDensity();
 708 }
 709
 710 v2u32 RenderingEngine::getDisplaySize()
 711 {
 712         return porting::getDisplaySize();
 713 }
 714 #endif // __ANDROID__