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
  62 static gui::GUISkin *createSkin(gui::IGUIEnvironment *environment,
  63                 gui::EGUI_SKIN_TYPE type, video::IVideoDriver *driver)
  64 {
  65         gui::GUISkin *skin = new gui::GUISkin(type, driver);
  66
  67         gui::IGUIFont *builtinfont = environment->getBuiltInFont();
  68         gui::IGUIFontBitmap *bitfont = nullptr;
  69         if (builtinfont && builtinfont->getType() == gui::EGFT_BITMAP)
  70                 bitfont = (gui::IGUIFontBitmap*)builtinfont;
  71
  72         gui::IGUISpriteBank *bank = 0;
  73         skin->setFont(builtinfont);
  74
  75         if (bitfont)
  76                 bank = bitfont->getSpriteBank();
  77
  78         skin->setSpriteBank(bank);
  79
  80         return skin;
  81 }
  82
  83
  84 RenderingEngine::RenderingEngine(IEventReceiver *receiver)
  85 {
  86         sanity_check(!s_singleton);
  87
  88         // Resolution selection
  89         bool fullscreen = g_settings->getBool("fullscreen");
  90         u16 screen_w = g_settings->getU16("screen_w");
  91         u16 screen_h = g_settings->getU16("screen_h");
  92
  93         // bpp, fsaa, vsync
  94         bool vsync = g_settings->getBool("vsync");
  95         u16 bits = g_settings->getU16("fullscreen_bpp");
  96         u16 fsaa = g_settings->getU16("fsaa");
  97
  98         // stereo buffer required for pageflip stereo
  99         bool stereo_buffer = g_settings->get("3d_mode") == "pageflip";
 100
 101         // Determine driver
 102         video::E_DRIVER_TYPE driverType = video::EDT_OPENGL;
 103         const std::string &driverstring = g_settings->get("video_driver");
 104         std::vector<video::E_DRIVER_TYPE> drivers =
 105                         RenderingEngine::getSupportedVideoDrivers();
 106         u32 i;
 107         for (i = 0; i != drivers.size(); i++) {
 108                 if (!strcasecmp(driverstring.c_str(),
 109                                 RenderingEngine::getVideoDriverName(drivers[i]))) {
 110                         driverType = drivers[i];
 111                         break;
 112                 }
 113         }
 114         if (i == drivers.size()) {
 115                 errorstream << "Invalid video_driver specified; "
 116                                "defaulting to opengl"
 117                             << std::endl;
 118         }
 119
 120         SIrrlichtCreationParameters params = SIrrlichtCreationParameters();
 121         params.DriverType = driverType;
 122         params.WindowSize = core::dimension2d<u32>(screen_w, screen_h);
 123         params.Bits = bits;
 124         params.AntiAlias = fsaa;
 125         params.Fullscreen = fullscreen;
 126         params.Stencilbuffer = false;
 127         params.Stereobuffer = stereo_buffer;
 128         params.Vsync = vsync;
 129         params.EventReceiver = receiver;
 130         params.HighPrecisionFPU = g_settings->getBool("high_precision_fpu");
 131         params.ZBufferBits = 24;
 132 #ifdef __ANDROID__
 133         params.PrivateData = porting::app_global;
 134 #endif
 135 #if ENABLE_GLES
 136         // there is no standardized path for these on desktop
 137         std::string rel_path = std::string("client") + DIR_DELIM
 138                         + "shaders" + DIR_DELIM + "Irrlicht";
 139         params.OGLES2ShaderPath = (porting::path_share + DIR_DELIM + rel_path + DIR_DELIM).c_str();
 140 #endif
 141
 142         m_device = createDeviceEx(params);
 143         driver = m_device->getVideoDriver();
 144
 145         s_singleton = this;
 146
 147         auto skin = createSkin(m_device->getGUIEnvironment(),
 148                         gui::EGST_WINDOWS_METALLIC, driver);
 149         m_device->getGUIEnvironment()->setSkin(skin);
 150         skin->drop();
 151 }
 152
 153 RenderingEngine::~RenderingEngine()
 154 {
 155         core.reset();
 156         m_device->closeDevice();
 157         s_singleton = nullptr;
 158 }
 159
 160 v2u32 RenderingEngine::getWindowSize() const
 161 {
 162         if (core)
 163                 return core->getVirtualSize();
 164         return m_device->getVideoDriver()->getScreenSize();
 165 }
 166
 167 void RenderingEngine::setResizable(bool resize)
 168 {
 169         m_device->setResizable(resize);
 170 }
 171
 172 bool RenderingEngine::print_video_modes()
 173 {
 174         IrrlichtDevice *nulldevice;
 175
 176         bool vsync = g_settings->getBool("vsync");
 177         u16 fsaa = g_settings->getU16("fsaa");
 178         MyEventReceiver *receiver = new MyEventReceiver();
 179
 180         SIrrlichtCreationParameters params = SIrrlichtCreationParameters();
 181         params.DriverType = video::EDT_NULL;
 182         params.WindowSize = core::dimension2d<u32>(640, 480);
 183         params.Bits = 24;
 184         params.AntiAlias = fsaa;
 185         params.Fullscreen = false;
 186         params.Stencilbuffer = false;
 187         params.Vsync = vsync;
 188         params.EventReceiver = receiver;
 189         params.HighPrecisionFPU = g_settings->getBool("high_precision_fpu");
 190
 191         nulldevice = createDeviceEx(params);
 192
 193         if (!nulldevice) {
 194                 delete receiver;
 195                 return false;
 196         }
 197
 198         std::cout << _("Available video modes (WxHxD):") << std::endl;
 199
 200         video::IVideoModeList *videomode_list = nulldevice->getVideoModeList();
 201
 202         if (videomode_list != NULL) {
 203                 s32 videomode_count = videomode_list->getVideoModeCount();
 204                 core::dimension2d<u32> videomode_res;
 205                 s32 videomode_depth;
 206                 for (s32 i = 0; i < videomode_count; ++i) {
 207                         videomode_res = videomode_list->getVideoModeResolution(i);
 208                         videomode_depth = videomode_list->getVideoModeDepth(i);
 209                         std::cout << videomode_res.Width << "x" << videomode_res.Height
 210                                   << "x" << videomode_depth << std::endl;
 211                 }
 212
 213                 std::cout << _("Active video mode (WxHxD):") << std::endl;
 214                 videomode_res = videomode_list->getDesktopResolution();
 215                 videomode_depth = videomode_list->getDesktopDepth();
 216                 std::cout << videomode_res.Width << "x" << videomode_res.Height << "x"
 217                           << videomode_depth << std::endl;
 218         }
 219
 220         nulldevice->drop();
 221         delete receiver;
 222
 223         return videomode_list != NULL;
 224 }
 225
 226 bool RenderingEngine::setupTopLevelWindow(const std::string &name)
 227 {
 228         // FIXME: It would make more sense for there to be a switch of some
 229         // sort here that would call the correct toplevel setup methods for
 230         // the environment Minetest is running in.
 231
 232         /* Setting Xorg properties for the top level window */
 233         setupTopLevelXorgWindow(name);
 234
 235         /* Setting general properties for the top level window */
 236         verbosestream << "Client: Configuring general top level"
 237                 << " window properties"
 238                 << std::endl;
 239         bool result = setWindowIcon();
 240
 241         return result;
 242 }
 243
 244 void RenderingEngine::setupTopLevelXorgWindow(const std::string &name)
 245 {
 246 #ifdef XORG_USED
 247         const video::SExposedVideoData exposedData = driver->getExposedVideoData();
 248
 249         Display *x11_dpl = reinterpret_cast<Display *>(exposedData.OpenGLLinux.X11Display);
 250         if (x11_dpl == NULL) {
 251                 warningstream << "Client: Could not find X11 Display in ExposedVideoData"
 252                         << std::endl;
 253                 return;
 254         }
 255
 256         verbosestream << "Client: Configuring X11-specific top level"
 257                 << " window properties"
 258                 << std::endl;
 259
 260
 261         Window x11_win = reinterpret_cast<Window>(exposedData.OpenGLLinux.X11Window);
 262
 263         // Set application name and class hints. For now name and class are the same.
 264         XClassHint *classhint = XAllocClassHint();
 265         classhint->res_name = const_cast<char *>(name.c_str());
 266         classhint->res_class = const_cast<char *>(name.c_str());
 267
 268         XSetClassHint(x11_dpl, x11_win, classhint);
 269         XFree(classhint);
 270
 271         // FIXME: In the future WMNormalHints should be set ... e.g see the
 272         // gtk/gdk code (gdk/x11/gdksurface-x11.c) for the setup_top_level
 273         // method. But for now (as it would require some significant changes)
 274         // leave the code as is.
 275
 276         // The following is borrowed from the above gdk source for setting top
 277         // level windows. The source indicates and the Xlib docs suggest that
 278         // this will set the WM_CLIENT_MACHINE and WM_LOCAL_NAME. This will not
 279         // set the WM_CLIENT_MACHINE to a Fully Qualified Domain Name (FQDN) which is
 280         // required by the Extended Window Manager Hints (EWMH) spec when setting
 281         // the _NET_WM_PID (see further down) but running Minetest in an env
 282         // where the window manager is on another machine from Minetest (therefore
 283         // making the PID useless) is not expected to be a problem. Further
 284         // more, using gtk/gdk as the model it would seem that not using a FQDN is
 285         // not an issue for modern Xorg window managers.
 286
 287         verbosestream << "Client: Setting Xorg window manager Properties"
 288                 << std::endl;
 289
 290         XSetWMProperties (x11_dpl, x11_win, NULL, NULL, NULL, 0, NULL, NULL, NULL);
 291
 292         // Set the _NET_WM_PID window property according to the EWMH spec. _NET_WM_PID
 293         // (in conjunction with WM_CLIENT_MACHINE) can be used by window managers to
 294         // force a shutdown of an application if it doesn't respond to the destroy
 295         // window message.
 296
 297         verbosestream << "Client: Setting Xorg _NET_WM_PID extened window manager property"
 298                 << std::endl;
 299
 300         Atom NET_WM_PID = XInternAtom(x11_dpl, "_NET_WM_PID", false);
 301
 302         pid_t pid = getpid();
 303
 304         XChangeProperty(x11_dpl, x11_win, NET_WM_PID,
 305                         XA_CARDINAL, 32, PropModeReplace,
 306                         reinterpret_cast<unsigned char *>(&pid),1);
 307
 308         // Set the WM_CLIENT_LEADER window property here. Minetest has only one
 309         // window and that window will always be the leader.
 310
 311         verbosestream << "Client: Setting Xorg WM_CLIENT_LEADER property"
 312                 << std::endl;
 313
 314         Atom WM_CLIENT_LEADER = XInternAtom(x11_dpl, "WM_CLIENT_LEADER", false);
 315
 316         XChangeProperty (x11_dpl, x11_win, WM_CLIENT_LEADER,
 317                 XA_WINDOW, 32, PropModeReplace,
 318                 reinterpret_cast<unsigned char *>(&x11_win), 1);
 319 #endif
 320 }
 321
 322 #ifdef _WIN32
 323 static bool getWindowHandle(irr::video::IVideoDriver *driver, HWND &hWnd)
 324 {
 325         const video::SExposedVideoData exposedData = driver->getExposedVideoData();
 326
 327         switch (driver->getDriverType()) {
 328 #if IRRLICHT_VERSION_MAJOR == 1 && IRRLICHT_VERSION_MINOR < 9
 329         case video::EDT_DIRECT3D8:
 330                 hWnd = reinterpret_cast<HWND>(exposedData.D3D8.HWnd);
 331                 break;
 332 #endif
 333         case video::EDT_DIRECT3D9:
 334                 hWnd = reinterpret_cast<HWND>(exposedData.D3D9.HWnd);
 335                 break;
 336         case video::EDT_OPENGL:
 337                 hWnd = reinterpret_cast<HWND>(exposedData.OpenGLWin32.HWnd);
 338                 break;
 339         default:
 340                 return false;
 341         }
 342
 343         return true;
 344 }
 345 #endif
 346
 347 bool RenderingEngine::setWindowIcon()
 348 {
 349 #if defined(XORG_USED)
 350 #if RUN_IN_PLACE
 351         return setXorgWindowIconFromPath(
 352                         porting::path_share + "/misc/" PROJECT_NAME "-xorg-icon-128.png");
 353 #else
 354         // We have semi-support for reading in-place data if we are
 355         // compiled with RUN_IN_PLACE. Don't break with this and
 356         // also try the path_share location.
 357         return setXorgWindowIconFromPath(
 358                                ICON_DIR "/hicolor/128x128/apps/" PROJECT_NAME ".png") ||
 359                setXorgWindowIconFromPath(porting::path_share + "/misc/" PROJECT_NAME
 360                                                                "-xorg-icon-128.png");
 361 #endif
 362 #elif defined(_WIN32)
 363         HWND hWnd; // Window handle
 364         if (!getWindowHandle(driver, hWnd))
 365                 return false;
 366
 367         // Load the ICON from resource file
 368         const HICON hicon = LoadIcon(GetModuleHandle(NULL),
 369                         MAKEINTRESOURCE(130) // The ID of the ICON defined in
 370                                              // winresource.rc
 371         );
 372
 373         if (hicon) {
 374                 SendMessage(hWnd, WM_SETICON, ICON_BIG, reinterpret_cast<LPARAM>(hicon));
 375                 SendMessage(hWnd, WM_SETICON, ICON_SMALL,
 376                                 reinterpret_cast<LPARAM>(hicon));
 377                 return true;
 378         }
 379         return false;
 380 #else
 381         return false;
 382 #endif
 383 }
 384
 385 bool RenderingEngine::setXorgWindowIconFromPath(const std::string &icon_file)
 386 {
 387 #ifdef XORG_USED
 388
 389         video::IImageLoader *image_loader = NULL;
 390         u32 cnt = driver->getImageLoaderCount();
 391         for (u32 i = 0; i < cnt; i++) {
 392                 if (driver->getImageLoader(i)->isALoadableFileExtension(
 393                                     icon_file.c_str())) {
 394                         image_loader = driver->getImageLoader(i);
 395                         break;
 396                 }
 397         }
 398
 399         if (!image_loader) {
 400                 warningstream << "Could not find image loader for file '" << icon_file
 401                               << "'" << std::endl;
 402                 return false;
 403         }
 404
 405         io::IReadFile *icon_f =
 406                         m_device->getFileSystem()->createAndOpenFile(icon_file.c_str());
 407
 408         if (!icon_f) {
 409                 warningstream << "Could not load icon file '" << icon_file << "'"
 410                               << std::endl;
 411                 return false;
 412         }
 413
 414         video::IImage *img = image_loader->loadImage(icon_f);
 415
 416         if (!img) {
 417                 warningstream << "Could not load icon file '" << icon_file << "'"
 418                               << std::endl;
 419                 icon_f->drop();
 420                 return false;
 421         }
 422
 423         u32 height = img->getDimension().Height;
 424         u32 width = img->getDimension().Width;
 425
 426         size_t icon_buffer_len = 2 + height * width;
 427         long *icon_buffer = new long[icon_buffer_len];
 428
 429         icon_buffer[0] = width;
 430         icon_buffer[1] = height;
 431
 432         for (u32 x = 0; x < width; x++) {
 433                 for (u32 y = 0; y < height; y++) {
 434                         video::SColor col = img->getPixel(x, y);
 435                         long pixel_val = 0;
 436                         pixel_val |= (u8)col.getAlpha() << 24;
 437                         pixel_val |= (u8)col.getRed() << 16;
 438                         pixel_val |= (u8)col.getGreen() << 8;
 439                         pixel_val |= (u8)col.getBlue();
 440                         icon_buffer[2 + x + y * width] = pixel_val;
 441                 }
 442         }
 443
 444         img->drop();
 445         icon_f->drop();
 446
 447         const video::SExposedVideoData &video_data = driver->getExposedVideoData();
 448
 449         Display *x11_dpl = (Display *)video_data.OpenGLLinux.X11Display;
 450
 451         if (x11_dpl == NULL) {
 452                 warningstream << "Could not find x11 display for setting its icon."
 453                               << std::endl;
 454                 delete[] icon_buffer;
 455                 return false;
 456         }
 457
 458         Window x11_win = (Window)video_data.OpenGLLinux.X11Window;
 459
 460         Atom net_wm_icon = XInternAtom(x11_dpl, "_NET_WM_ICON", False);
 461         Atom cardinal = XInternAtom(x11_dpl, "CARDINAL", False);
 462         XChangeProperty(x11_dpl, x11_win, net_wm_icon, cardinal, 32, PropModeReplace,
 463                         (const unsigned char *)icon_buffer, icon_buffer_len);
 464
 465         delete[] icon_buffer;
 466
 467 #endif
 468         return true;
 469 }
 470
 471 /*
 472         Draws a screen with a single text on it.
 473         Text will be removed when the screen is drawn the next time.
 474         Additionally, a progressbar can be drawn when percent is set between 0 and 100.
 475 */
 476 void RenderingEngine::_draw_load_screen(const std::wstring &text,
 477                 gui::IGUIEnvironment *guienv, ITextureSource *tsrc, float dtime,
 478                 int percent, bool clouds)
 479 {
 480         v2u32 screensize = RenderingEngine::get_instance()->getWindowSize();
 481
 482         v2s32 textsize(g_fontengine->getTextWidth(text), g_fontengine->getLineHeight());
 483         v2s32 center(screensize.X / 2, screensize.Y / 2);
 484         core::rect<s32> textrect(center - textsize / 2, center + textsize / 2);
 485
 486         gui::IGUIStaticText *guitext =
 487                         guienv->addStaticText(text.c_str(), textrect, false, false);
 488         guitext->setTextAlignment(gui::EGUIA_CENTER, gui::EGUIA_UPPERLEFT);
 489
 490         bool cloud_menu_background = clouds && g_settings->getBool("menu_clouds");
 491         if (cloud_menu_background) {
 492                 g_menuclouds->step(dtime * 3);
 493                 g_menuclouds->render();
 494                 get_video_driver()->beginScene(
 495                                 true, true, video::SColor(255, 140, 186, 250));
 496                 g_menucloudsmgr->drawAll();
 497         } else
 498                 get_video_driver()->beginScene(true, true, video::SColor(255, 0, 0, 0));
 499
 500         // draw progress bar
 501         if ((percent >= 0) && (percent <= 100)) {
 502                 video::ITexture *progress_img = tsrc->getTexture("progress_bar.png");
 503                 video::ITexture *progress_img_bg =
 504                                 tsrc->getTexture("progress_bar_bg.png");
 505
 506                 if (progress_img && progress_img_bg) {
 507 #ifndef __ANDROID__
 508                         const core::dimension2d<u32> &img_size =
 509                                         progress_img_bg->getSize();
 510                         u32 imgW = rangelim(img_size.Width, 200, 600);
 511                         u32 imgH = rangelim(img_size.Height, 24, 72);
 512 #else
 513                         const core::dimension2d<u32> img_size(256, 48);
 514                         float imgRatio = (float)img_size.Height / img_size.Width;
 515                         u32 imgW = screensize.X / 2.2f;
 516                         u32 imgH = floor(imgW * imgRatio);
 517 #endif
 518                         v2s32 img_pos((screensize.X - imgW) / 2,
 519                                         (screensize.Y - imgH) / 2);
 520
 521                         draw2DImageFilterScaled(get_video_driver(), progress_img_bg,
 522                                         core::rect<s32>(img_pos.X, img_pos.Y,
 523                                                         img_pos.X + imgW,
 524                                                         img_pos.Y + imgH),
 525                                         core::rect<s32>(0, 0, img_size.Width,
 526                                                         img_size.Height),
 527                                         0, 0, true);
 528
 529                         draw2DImageFilterScaled(get_video_driver(), progress_img,
 530                                         core::rect<s32>(img_pos.X, img_pos.Y,
 531                                                         img_pos.X + (percent * imgW) / 100,
 532                                                         img_pos.Y + imgH),
 533                                         core::rect<s32>(0, 0,
 534                                                         (percent * img_size.Width) / 100,
 535                                                         img_size.Height),
 536                                         0, 0, true);
 537                 }
 538         }
 539
 540         guienv->drawAll();
 541         get_video_driver()->endScene();
 542         guitext->remove();
 543 }
 544
 545 /*
 546         Draws the menu scene including (optional) cloud background.
 547 */
 548 void RenderingEngine::_draw_menu_scene(gui::IGUIEnvironment *guienv,
 549                 float dtime, bool clouds)
 550 {
 551         bool cloud_menu_background = clouds && g_settings->getBool("menu_clouds");
 552         if (cloud_menu_background) {
 553                 g_menuclouds->step(dtime * 3);
 554                 g_menuclouds->render();
 555                 get_video_driver()->beginScene(
 556                                 true, true, video::SColor(255, 140, 186, 250));
 557                 g_menucloudsmgr->drawAll();
 558         } else
 559                 get_video_driver()->beginScene(true, true, video::SColor(255, 0, 0, 0));
 560
 561         guienv->drawAll();
 562         get_video_driver()->endScene();
 563 }
 564
 565 std::vector<core::vector3d<u32>> RenderingEngine::getSupportedVideoModes()
 566 {
 567         IrrlichtDevice *nulldevice = createDevice(video::EDT_NULL);
 568         sanity_check(nulldevice);
 569
 570         std::vector<core::vector3d<u32>> mlist;
 571         video::IVideoModeList *modelist = nulldevice->getVideoModeList();
 572
 573         s32 num_modes = modelist->getVideoModeCount();
 574         for (s32 i = 0; i != num_modes; i++) {
 575                 core::dimension2d<u32> mode_res = modelist->getVideoModeResolution(i);
 576                 u32 mode_depth = (u32)modelist->getVideoModeDepth(i);
 577                 mlist.emplace_back(mode_res.Width, mode_res.Height, mode_depth);
 578         }
 579
 580         nulldevice->drop();
 581         return mlist;
 582 }
 583
 584 std::vector<irr::video::E_DRIVER_TYPE> RenderingEngine::getSupportedVideoDrivers()
 585 {
 586         std::vector<irr::video::E_DRIVER_TYPE> drivers;
 587
 588         for (int i = 0; i != irr::video::EDT_COUNT; i++) {
 589                 if (irr::IrrlichtDevice::isDriverSupported((irr::video::E_DRIVER_TYPE)i))
 590                         drivers.push_back((irr::video::E_DRIVER_TYPE)i);
 591         }
 592
 593         return drivers;
 594 }
 595
 596 void RenderingEngine::_initialize(Client *client, Hud *hud)
 597 {
 598         const std::string &draw_mode = g_settings->get("3d_mode");
 599         core.reset(createRenderingCore(draw_mode, m_device, client, hud));
 600         core->initialize();
 601 }
 602
 603 void RenderingEngine::_finalize()
 604 {
 605         core.reset();
 606 }
 607
 608 void RenderingEngine::_draw_scene(video::SColor skycolor, bool show_hud,
 609                 bool show_minimap, bool draw_wield_tool, bool draw_crosshair)
 610 {
 611         core->draw(skycolor, show_hud, show_minimap, draw_wield_tool, draw_crosshair);
 612 }
 613
 614 const char *RenderingEngine::getVideoDriverName(irr::video::E_DRIVER_TYPE type)
 615 {
 616         static const char *driver_ids[] = {
 617                         "null",
 618                         "software",
 619                         "burningsvideo",
 620                         "direct3d8",
 621                         "direct3d9",
 622                         "opengl",
 623                         "ogles1",
 624                         "ogles2",
 625         };
 626
 627         return driver_ids[type];
 628 }
 629
 630 const char *RenderingEngine::getVideoDriverFriendlyName(irr::video::E_DRIVER_TYPE type)
 631 {
 632         static const char *driver_names[] = {
 633                         "NULL Driver",
 634                         "Software Renderer",
 635                         "Burning's Video",
 636                         "Direct3D 8",
 637                         "Direct3D 9",
 638                         "OpenGL",
 639                         "OpenGL ES1",
 640                         "OpenGL ES2",
 641         };
 642
 643         return driver_names[type];
 644 }
 645
 646 #ifndef __ANDROID__
 647 #if defined(XORG_USED)
 648
 649 static float calcDisplayDensity()
 650 {
 651         const char *current_display = getenv("DISPLAY");
 652
 653         if (current_display != NULL) {
 654                 Display *x11display = XOpenDisplay(current_display);
 655
 656                 if (x11display != NULL) {
 657                         /* try x direct */
 658                         int dh = DisplayHeight(x11display, 0);
 659                         int dw = DisplayWidth(x11display, 0);
 660                         int dh_mm = DisplayHeightMM(x11display, 0);
 661                         int dw_mm = DisplayWidthMM(x11display, 0);
 662                         XCloseDisplay(x11display);
 663
 664                         if (dh_mm != 0 && dw_mm != 0) {
 665                                 float dpi_height = floor(dh / (dh_mm * 0.039370) + 0.5);
 666                                 float dpi_width = floor(dw / (dw_mm * 0.039370) + 0.5);
 667                                 return std::max(dpi_height, dpi_width) / 96.0;
 668                         }
 669                 }
 670         }
 671
 672         /* return manually specified dpi */
 673         return g_settings->getFloat("screen_dpi") / 96.0;
 674 }
 675
 676 float RenderingEngine::getDisplayDensity()
 677 {
 678         static float cached_display_density = calcDisplayDensity();
 679         return cached_display_density;
 680 }
 681
 682 #elif defined(_WIN32)
 683
 684
 685 static float calcDisplayDensity(irr::video::IVideoDriver *driver)
 686 {
 687         HWND hWnd;
 688         if (getWindowHandle(driver, hWnd)) {
 689                 HDC hdc = GetDC(hWnd);
 690                 float dpi = GetDeviceCaps(hdc, LOGPIXELSX);
 691                 ReleaseDC(hWnd, hdc);
 692                 return dpi / 96.0f;
 693         }
 694
 695         /* return manually specified dpi */
 696         return g_settings->getFloat("screen_dpi") / 96.0f;
 697 }
 698
 699 float RenderingEngine::getDisplayDensity()
 700 {
 701         static bool cached = false;
 702         static float display_density;
 703         if (!cached) {
 704                 display_density = calcDisplayDensity(get_video_driver());
 705                 cached = true;
 706         }
 707         return display_density;
 708 }
 709
 710 #else
 711
 712 float RenderingEngine::getDisplayDensity()
 713 {
 714         return g_settings->getFloat("screen_dpi") / 96.0;
 715 }
 716
 717 #endif
 718
 719 v2u32 RenderingEngine::getDisplaySize()
 720 {
 721         IrrlichtDevice *nulldevice = createDevice(video::EDT_NULL);
 722
 723         core::dimension2d<u32> deskres =
 724                         nulldevice->getVideoModeList()->getDesktopResolution();
 725         nulldevice->drop();
 726
 727         return deskres;
 728 }
 729
 730 #else // __ANDROID__
 731 float RenderingEngine::getDisplayDensity()
 732 {
 733         return porting::getDisplayDensity();
 734 }
 735
 736 v2u32 RenderingEngine::getDisplaySize()
 737 {
 738         return porting::getDisplaySize();
 739 }
 740 #endif // __ANDROID__