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         if (g_logger.getTraceEnabled())
 122                 params.LoggingLevel = irr::ELL_DEBUG;
 123         params.DriverType = driverType;
 124         params.WindowSize = core::dimension2d<u32>(screen_w, screen_h);
 125         params.Bits = bits;
 126         params.AntiAlias = fsaa;
 127         params.Fullscreen = fullscreen;
 128         params.Stencilbuffer = false;
 129         params.Stereobuffer = stereo_buffer;
 130         params.Vsync = vsync;
 131         params.EventReceiver = receiver;
 132         params.HighPrecisionFPU = g_settings->getBool("high_precision_fpu");
 133         params.ZBufferBits = 24;
 134 #ifdef __ANDROID__
 135         params.PrivateData = porting::app_global;
 136 #endif
 137 #if ENABLE_GLES
 138         // there is no standardized path for these on desktop
 139         std::string rel_path = std::string("client") + DIR_DELIM
 140                         + "shaders" + DIR_DELIM + "Irrlicht";
 141         params.OGLES2ShaderPath = (porting::path_share + DIR_DELIM + rel_path + DIR_DELIM).c_str();
 142 #endif
 143
 144         m_device = createDeviceEx(params);
 145         driver = m_device->getVideoDriver();
 146
 147         s_singleton = this;
 148
 149         auto skin = createSkin(m_device->getGUIEnvironment(),
 150                         gui::EGST_WINDOWS_METALLIC, driver);
 151         m_device->getGUIEnvironment()->setSkin(skin);
 152         skin->drop();
 153 }
 154
 155 RenderingEngine::~RenderingEngine()
 156 {
 157         core.reset();
 158         m_device->closeDevice();
 159         s_singleton = nullptr;
 160 }
 161
 162 v2u32 RenderingEngine::getWindowSize() const
 163 {
 164         if (core)
 165                 return core->getVirtualSize();
 166         return m_device->getVideoDriver()->getScreenSize();
 167 }
 168
 169 void RenderingEngine::setResizable(bool resize)
 170 {
 171         m_device->setResizable(resize);
 172 }
 173
 174 bool RenderingEngine::print_video_modes()
 175 {
 176         IrrlichtDevice *nulldevice;
 177
 178         bool vsync = g_settings->getBool("vsync");
 179         u16 fsaa = g_settings->getU16("fsaa");
 180         MyEventReceiver *receiver = new MyEventReceiver();
 181
 182         SIrrlichtCreationParameters params = SIrrlichtCreationParameters();
 183         params.DriverType = video::EDT_NULL;
 184         params.WindowSize = core::dimension2d<u32>(640, 480);
 185         params.Bits = 24;
 186         params.AntiAlias = fsaa;
 187         params.Fullscreen = false;
 188         params.Stencilbuffer = false;
 189         params.Vsync = vsync;
 190         params.EventReceiver = receiver;
 191         params.HighPrecisionFPU = g_settings->getBool("high_precision_fpu");
 192
 193         nulldevice = createDeviceEx(params);
 194
 195         if (!nulldevice) {
 196                 delete receiver;
 197                 return false;
 198         }
 199
 200         std::cout << _("Available video modes (WxHxD):") << std::endl;
 201
 202         video::IVideoModeList *videomode_list = nulldevice->getVideoModeList();
 203
 204         if (videomode_list != NULL) {
 205                 s32 videomode_count = videomode_list->getVideoModeCount();
 206                 core::dimension2d<u32> videomode_res;
 207                 s32 videomode_depth;
 208                 for (s32 i = 0; i < videomode_count; ++i) {
 209                         videomode_res = videomode_list->getVideoModeResolution(i);
 210                         videomode_depth = videomode_list->getVideoModeDepth(i);
 211                         std::cout << videomode_res.Width << "x" << videomode_res.Height
 212                                   << "x" << videomode_depth << std::endl;
 213                 }
 214
 215                 std::cout << _("Active video mode (WxHxD):") << std::endl;
 216                 videomode_res = videomode_list->getDesktopResolution();
 217                 videomode_depth = videomode_list->getDesktopDepth();
 218                 std::cout << videomode_res.Width << "x" << videomode_res.Height << "x"
 219                           << videomode_depth << std::endl;
 220         }
 221
 222         nulldevice->drop();
 223         delete receiver;
 224
 225         return videomode_list != NULL;
 226 }
 227
 228 bool RenderingEngine::setupTopLevelWindow(const std::string &name)
 229 {
 230         // FIXME: It would make more sense for there to be a switch of some
 231         // sort here that would call the correct toplevel setup methods for
 232         // the environment Minetest is running in.
 233
 234         /* Setting Xorg properties for the top level window */
 235         setupTopLevelXorgWindow(name);
 236
 237         /* Setting general properties for the top level window */
 238         verbosestream << "Client: Configuring general top level"
 239                 << " window properties"
 240                 << std::endl;
 241         bool result = setWindowIcon();
 242
 243         return result;
 244 }
 245
 246 void RenderingEngine::setupTopLevelXorgWindow(const std::string &name)
 247 {
 248 #ifdef XORG_USED
 249         const video::SExposedVideoData exposedData = driver->getExposedVideoData();
 250
 251         Display *x11_dpl = reinterpret_cast<Display *>(exposedData.OpenGLLinux.X11Display);
 252         if (x11_dpl == NULL) {
 253                 warningstream << "Client: Could not find X11 Display in ExposedVideoData"
 254                         << std::endl;
 255                 return;
 256         }
 257
 258         verbosestream << "Client: Configuring X11-specific top level"
 259                 << " window properties"
 260                 << std::endl;
 261
 262
 263         Window x11_win = reinterpret_cast<Window>(exposedData.OpenGLLinux.X11Window);
 264
 265         // Set application name and class hints. For now name and class are the same.
 266         XClassHint *classhint = XAllocClassHint();
 267         classhint->res_name = const_cast<char *>(name.c_str());
 268         classhint->res_class = const_cast<char *>(name.c_str());
 269
 270         XSetClassHint(x11_dpl, x11_win, classhint);
 271         XFree(classhint);
 272
 273         // FIXME: In the future WMNormalHints should be set ... e.g see the
 274         // gtk/gdk code (gdk/x11/gdksurface-x11.c) for the setup_top_level
 275         // method. But for now (as it would require some significant changes)
 276         // leave the code as is.
 277
 278         // The following is borrowed from the above gdk source for setting top
 279         // level windows. The source indicates and the Xlib docs suggest that
 280         // this will set the WM_CLIENT_MACHINE and WM_LOCAL_NAME. This will not
 281         // set the WM_CLIENT_MACHINE to a Fully Qualified Domain Name (FQDN) which is
 282         // required by the Extended Window Manager Hints (EWMH) spec when setting
 283         // the _NET_WM_PID (see further down) but running Minetest in an env
 284         // where the window manager is on another machine from Minetest (therefore
 285         // making the PID useless) is not expected to be a problem. Further
 286         // more, using gtk/gdk as the model it would seem that not using a FQDN is
 287         // not an issue for modern Xorg window managers.
 288
 289         verbosestream << "Client: Setting Xorg window manager Properties"
 290                 << std::endl;
 291
 292         XSetWMProperties (x11_dpl, x11_win, NULL, NULL, NULL, 0, NULL, NULL, NULL);
 293
 294         // Set the _NET_WM_PID window property according to the EWMH spec. _NET_WM_PID
 295         // (in conjunction with WM_CLIENT_MACHINE) can be used by window managers to
 296         // force a shutdown of an application if it doesn't respond to the destroy
 297         // window message.
 298
 299         verbosestream << "Client: Setting Xorg _NET_WM_PID extened window manager property"
 300                 << std::endl;
 301
 302         Atom NET_WM_PID = XInternAtom(x11_dpl, "_NET_WM_PID", false);
 303
 304         pid_t pid = getpid();
 305
 306         XChangeProperty(x11_dpl, x11_win, NET_WM_PID,
 307                         XA_CARDINAL, 32, PropModeReplace,
 308                         reinterpret_cast<unsigned char *>(&pid),1);
 309
 310         // Set the WM_CLIENT_LEADER window property here. Minetest has only one
 311         // window and that window will always be the leader.
 312
 313         verbosestream << "Client: Setting Xorg WM_CLIENT_LEADER property"
 314                 << std::endl;
 315
 316         Atom WM_CLIENT_LEADER = XInternAtom(x11_dpl, "WM_CLIENT_LEADER", false);
 317
 318         XChangeProperty (x11_dpl, x11_win, WM_CLIENT_LEADER,
 319                 XA_WINDOW, 32, PropModeReplace,
 320                 reinterpret_cast<unsigned char *>(&x11_win), 1);
 321 #endif
 322 }
 323
 324 #ifdef _WIN32
 325 static bool getWindowHandle(irr::video::IVideoDriver *driver, HWND &hWnd)
 326 {
 327         const video::SExposedVideoData exposedData = driver->getExposedVideoData();
 328
 329         switch (driver->getDriverType()) {
 330 #if IRRLICHT_VERSION_MAJOR == 1 && IRRLICHT_VERSION_MINOR < 9
 331         case video::EDT_DIRECT3D8:
 332                 hWnd = reinterpret_cast<HWND>(exposedData.D3D8.HWnd);
 333                 break;
 334 #endif
 335         case video::EDT_DIRECT3D9:
 336                 hWnd = reinterpret_cast<HWND>(exposedData.D3D9.HWnd);
 337                 break;
 338 #if ENABLE_GLES
 339         case video::EDT_OGLES1:
 340         case video::EDT_OGLES2:
 341 #endif
 342         case video::EDT_OPENGL:
 343                 hWnd = reinterpret_cast<HWND>(exposedData.OpenGLWin32.HWnd);
 344                 break;
 345         default:
 346                 return false;
 347         }
 348
 349         return true;
 350 }
 351 #endif
 352
 353 bool RenderingEngine::setWindowIcon()
 354 {
 355 #if defined(XORG_USED)
 356 #if RUN_IN_PLACE
 357         return setXorgWindowIconFromPath(
 358                         porting::path_share + "/misc/" PROJECT_NAME "-xorg-icon-128.png");
 359 #else
 360         // We have semi-support for reading in-place data if we are
 361         // compiled with RUN_IN_PLACE. Don't break with this and
 362         // also try the path_share location.
 363         return setXorgWindowIconFromPath(
 364                                ICON_DIR "/hicolor/128x128/apps/" PROJECT_NAME ".png") ||
 365                setXorgWindowIconFromPath(porting::path_share + "/misc/" PROJECT_NAME
 366                                                                "-xorg-icon-128.png");
 367 #endif
 368 #elif defined(_WIN32)
 369         HWND hWnd; // Window handle
 370         if (!getWindowHandle(driver, hWnd))
 371                 return false;
 372
 373         // Load the ICON from resource file
 374         const HICON hicon = LoadIcon(GetModuleHandle(NULL),
 375                         MAKEINTRESOURCE(130) // The ID of the ICON defined in
 376                                              // winresource.rc
 377         );
 378
 379         if (hicon) {
 380                 SendMessage(hWnd, WM_SETICON, ICON_BIG, reinterpret_cast<LPARAM>(hicon));
 381                 SendMessage(hWnd, WM_SETICON, ICON_SMALL,
 382                                 reinterpret_cast<LPARAM>(hicon));
 383                 return true;
 384         }
 385         return false;
 386 #else
 387         return false;
 388 #endif
 389 }
 390
 391 bool RenderingEngine::setXorgWindowIconFromPath(const std::string &icon_file)
 392 {
 393 #ifdef XORG_USED
 394
 395         video::IImageLoader *image_loader = NULL;
 396         u32 cnt = driver->getImageLoaderCount();
 397         for (u32 i = 0; i < cnt; i++) {
 398                 if (driver->getImageLoader(i)->isALoadableFileExtension(
 399                                     icon_file.c_str())) {
 400                         image_loader = driver->getImageLoader(i);
 401                         break;
 402                 }
 403         }
 404
 405         if (!image_loader) {
 406                 warningstream << "Could not find image loader for file '" << icon_file
 407                               << "'" << std::endl;
 408                 return false;
 409         }
 410
 411         io::IReadFile *icon_f =
 412                         m_device->getFileSystem()->createAndOpenFile(icon_file.c_str());
 413
 414         if (!icon_f) {
 415                 warningstream << "Could not load icon file '" << icon_file << "'"
 416                               << std::endl;
 417                 return false;
 418         }
 419
 420         video::IImage *img = image_loader->loadImage(icon_f);
 421
 422         if (!img) {
 423                 warningstream << "Could not load icon file '" << icon_file << "'"
 424                               << std::endl;
 425                 icon_f->drop();
 426                 return false;
 427         }
 428
 429         u32 height = img->getDimension().Height;
 430         u32 width = img->getDimension().Width;
 431
 432         size_t icon_buffer_len = 2 + height * width;
 433         long *icon_buffer = new long[icon_buffer_len];
 434
 435         icon_buffer[0] = width;
 436         icon_buffer[1] = height;
 437
 438         for (u32 x = 0; x < width; x++) {
 439                 for (u32 y = 0; y < height; y++) {
 440                         video::SColor col = img->getPixel(x, y);
 441                         long pixel_val = 0;
 442                         pixel_val |= (u8)col.getAlpha() << 24;
 443                         pixel_val |= (u8)col.getRed() << 16;
 444                         pixel_val |= (u8)col.getGreen() << 8;
 445                         pixel_val |= (u8)col.getBlue();
 446                         icon_buffer[2 + x + y * width] = pixel_val;
 447                 }
 448         }
 449
 450         img->drop();
 451         icon_f->drop();
 452
 453         const video::SExposedVideoData &video_data = driver->getExposedVideoData();
 454
 455         Display *x11_dpl = (Display *)video_data.OpenGLLinux.X11Display;
 456
 457         if (x11_dpl == NULL) {
 458                 warningstream << "Could not find x11 display for setting its icon."
 459                               << std::endl;
 460                 delete[] icon_buffer;
 461                 return false;
 462         }
 463
 464         Window x11_win = (Window)video_data.OpenGLLinux.X11Window;
 465
 466         Atom net_wm_icon = XInternAtom(x11_dpl, "_NET_WM_ICON", False);
 467         Atom cardinal = XInternAtom(x11_dpl, "CARDINAL", False);
 468         XChangeProperty(x11_dpl, x11_win, net_wm_icon, cardinal, 32, PropModeReplace,
 469                         (const unsigned char *)icon_buffer, icon_buffer_len);
 470
 471         delete[] icon_buffer;
 472
 473 #endif
 474         return true;
 475 }
 476
 477 /*
 478         Draws a screen with a single text on it.
 479         Text will be removed when the screen is drawn the next time.
 480         Additionally, a progressbar can be drawn when percent is set between 0 and 100.
 481 */
 482 void RenderingEngine::_draw_load_screen(const std::wstring &text,
 483                 gui::IGUIEnvironment *guienv, ITextureSource *tsrc, float dtime,
 484                 int percent, bool clouds)
 485 {
 486         v2u32 screensize = RenderingEngine::get_instance()->getWindowSize();
 487
 488         v2s32 textsize(g_fontengine->getTextWidth(text), g_fontengine->getLineHeight());
 489         v2s32 center(screensize.X / 2, screensize.Y / 2);
 490         core::rect<s32> textrect(center - textsize / 2, center + textsize / 2);
 491
 492         gui::IGUIStaticText *guitext =
 493                         guienv->addStaticText(text.c_str(), textrect, false, false);
 494         guitext->setTextAlignment(gui::EGUIA_CENTER, gui::EGUIA_UPPERLEFT);
 495
 496         bool cloud_menu_background = clouds && g_settings->getBool("menu_clouds");
 497         if (cloud_menu_background) {
 498                 g_menuclouds->step(dtime * 3);
 499                 g_menuclouds->render();
 500                 get_video_driver()->beginScene(
 501                                 true, true, video::SColor(255, 140, 186, 250));
 502                 g_menucloudsmgr->drawAll();
 503         } else
 504                 get_video_driver()->beginScene(true, true, video::SColor(255, 0, 0, 0));
 505
 506         // draw progress bar
 507         if ((percent >= 0) && (percent <= 100)) {
 508                 video::ITexture *progress_img = tsrc->getTexture("progress_bar.png");
 509                 video::ITexture *progress_img_bg =
 510                                 tsrc->getTexture("progress_bar_bg.png");
 511
 512                 if (progress_img && progress_img_bg) {
 513 #ifndef __ANDROID__
 514                         const core::dimension2d<u32> &img_size =
 515                                         progress_img_bg->getSize();
 516                         u32 imgW = rangelim(img_size.Width, 200, 600);
 517                         u32 imgH = rangelim(img_size.Height, 24, 72);
 518 #else
 519                         const core::dimension2d<u32> img_size(256, 48);
 520                         float imgRatio = (float)img_size.Height / img_size.Width;
 521                         u32 imgW = screensize.X / 2.2f;
 522                         u32 imgH = floor(imgW * imgRatio);
 523 #endif
 524                         v2s32 img_pos((screensize.X - imgW) / 2,
 525                                         (screensize.Y - imgH) / 2);
 526
 527                         draw2DImageFilterScaled(get_video_driver(), progress_img_bg,
 528                                         core::rect<s32>(img_pos.X, img_pos.Y,
 529                                                         img_pos.X + imgW,
 530                                                         img_pos.Y + imgH),
 531                                         core::rect<s32>(0, 0, img_size.Width,
 532                                                         img_size.Height),
 533                                         0, 0, true);
 534
 535                         draw2DImageFilterScaled(get_video_driver(), progress_img,
 536                                         core::rect<s32>(img_pos.X, img_pos.Y,
 537                                                         img_pos.X + (percent * imgW) / 100,
 538                                                         img_pos.Y + imgH),
 539                                         core::rect<s32>(0, 0,
 540                                                         (percent * img_size.Width) / 100,
 541                                                         img_size.Height),
 542                                         0, 0, true);
 543                 }
 544         }
 545
 546         guienv->drawAll();
 547         get_video_driver()->endScene();
 548         guitext->remove();
 549 }
 550
 551 /*
 552         Draws the menu scene including (optional) cloud background.
 553 */
 554 void RenderingEngine::_draw_menu_scene(gui::IGUIEnvironment *guienv,
 555                 float dtime, bool clouds)
 556 {
 557         bool cloud_menu_background = clouds && g_settings->getBool("menu_clouds");
 558         if (cloud_menu_background) {
 559                 g_menuclouds->step(dtime * 3);
 560                 g_menuclouds->render();
 561                 get_video_driver()->beginScene(
 562                                 true, true, video::SColor(255, 140, 186, 250));
 563                 g_menucloudsmgr->drawAll();
 564         } else
 565                 get_video_driver()->beginScene(true, true, video::SColor(255, 0, 0, 0));
 566
 567         guienv->drawAll();
 568         get_video_driver()->endScene();
 569 }
 570
 571 std::vector<core::vector3d<u32>> RenderingEngine::getSupportedVideoModes()
 572 {
 573         IrrlichtDevice *nulldevice = createDevice(video::EDT_NULL);
 574         sanity_check(nulldevice);
 575
 576         std::vector<core::vector3d<u32>> mlist;
 577         video::IVideoModeList *modelist = nulldevice->getVideoModeList();
 578
 579         s32 num_modes = modelist->getVideoModeCount();
 580         for (s32 i = 0; i != num_modes; i++) {
 581                 core::dimension2d<u32> mode_res = modelist->getVideoModeResolution(i);
 582                 u32 mode_depth = (u32)modelist->getVideoModeDepth(i);
 583                 mlist.emplace_back(mode_res.Width, mode_res.Height, mode_depth);
 584         }
 585
 586         nulldevice->drop();
 587         return mlist;
 588 }
 589
 590 std::vector<irr::video::E_DRIVER_TYPE> RenderingEngine::getSupportedVideoDrivers()
 591 {
 592         std::vector<irr::video::E_DRIVER_TYPE> drivers;
 593
 594         for (int i = 0; i != irr::video::EDT_COUNT; i++) {
 595                 if (irr::IrrlichtDevice::isDriverSupported((irr::video::E_DRIVER_TYPE)i))
 596                         drivers.push_back((irr::video::E_DRIVER_TYPE)i);
 597         }
 598
 599         return drivers;
 600 }
 601
 602 void RenderingEngine::_initialize(Client *client, Hud *hud)
 603 {
 604         const std::string &draw_mode = g_settings->get("3d_mode");
 605         core.reset(createRenderingCore(draw_mode, m_device, client, hud));
 606         core->initialize();
 607 }
 608
 609 void RenderingEngine::_finalize()
 610 {
 611         core.reset();
 612 }
 613
 614 void RenderingEngine::_draw_scene(video::SColor skycolor, bool show_hud,
 615                 bool show_minimap, bool draw_wield_tool, bool draw_crosshair)
 616 {
 617         core->draw(skycolor, show_hud, show_minimap, draw_wield_tool, draw_crosshair);
 618 }
 619
 620 const char *RenderingEngine::getVideoDriverName(irr::video::E_DRIVER_TYPE type)
 621 {
 622         static const char *driver_ids[] = {
 623                         "null",
 624                         "software",
 625                         "burningsvideo",
 626                         "direct3d8",
 627                         "direct3d9",
 628                         "opengl",
 629                         "ogles1",
 630                         "ogles2",
 631         };
 632
 633         return driver_ids[type];
 634 }
 635
 636 const char *RenderingEngine::getVideoDriverFriendlyName(irr::video::E_DRIVER_TYPE type)
 637 {
 638         static const char *driver_names[] = {
 639                         "NULL Driver",
 640                         "Software Renderer",
 641                         "Burning's Video",
 642                         "Direct3D 8",
 643                         "Direct3D 9",
 644                         "OpenGL",
 645                         "OpenGL ES1",
 646                         "OpenGL ES2",
 647         };
 648
 649         return driver_names[type];
 650 }
 651
 652 #ifndef __ANDROID__
 653 #if defined(XORG_USED)
 654
 655 static float calcDisplayDensity()
 656 {
 657         const char *current_display = getenv("DISPLAY");
 658
 659         if (current_display != NULL) {
 660                 Display *x11display = XOpenDisplay(current_display);
 661
 662                 if (x11display != NULL) {
 663                         /* try x direct */
 664                         int dh = DisplayHeight(x11display, 0);
 665                         int dw = DisplayWidth(x11display, 0);
 666                         int dh_mm = DisplayHeightMM(x11display, 0);
 667                         int dw_mm = DisplayWidthMM(x11display, 0);
 668                         XCloseDisplay(x11display);
 669
 670                         if (dh_mm != 0 && dw_mm != 0) {
 671                                 float dpi_height = floor(dh / (dh_mm * 0.039370) + 0.5);
 672                                 float dpi_width = floor(dw / (dw_mm * 0.039370) + 0.5);
 673                                 return std::max(dpi_height, dpi_width) / 96.0;
 674                         }
 675                 }
 676         }
 677
 678         /* return manually specified dpi */
 679         return g_settings->getFloat("screen_dpi") / 96.0;
 680 }
 681
 682 float RenderingEngine::getDisplayDensity()
 683 {
 684         static float cached_display_density = calcDisplayDensity();
 685         return cached_display_density;
 686 }
 687
 688 #elif defined(_WIN32)
 689
 690
 691 static float calcDisplayDensity(irr::video::IVideoDriver *driver)
 692 {
 693         HWND hWnd;
 694         if (getWindowHandle(driver, hWnd)) {
 695                 HDC hdc = GetDC(hWnd);
 696                 float dpi = GetDeviceCaps(hdc, LOGPIXELSX);
 697                 ReleaseDC(hWnd, hdc);
 698                 return dpi / 96.0f;
 699         }
 700
 701         /* return manually specified dpi */
 702         return g_settings->getFloat("screen_dpi") / 96.0f;
 703 }
 704
 705 float RenderingEngine::getDisplayDensity()
 706 {
 707         static bool cached = false;
 708         static float display_density;
 709         if (!cached) {
 710                 display_density = calcDisplayDensity(get_video_driver());
 711                 cached = true;
 712         }
 713         return display_density;
 714 }
 715
 716 #else
 717
 718 float RenderingEngine::getDisplayDensity()
 719 {
 720         return g_settings->getFloat("screen_dpi") / 96.0;
 721 }
 722
 723 #endif
 724
 725 v2u32 RenderingEngine::getDisplaySize()
 726 {
 727         IrrlichtDevice *nulldevice = createDevice(video::EDT_NULL);
 728
 729         core::dimension2d<u32> deskres =
 730                         nulldevice->getVideoModeList()->getDesktopResolution();
 731         nulldevice->drop();
 732
 733         return deskres;
 734 }
 735
 736 #else // __ANDROID__
 737 float RenderingEngine::getDisplayDensity()
 738 {
 739         return porting::getDisplayDensity();
 740 }
 741
 742 v2u32 RenderingEngine::getDisplaySize()
 743 {
 744         return porting::getDisplaySize();
 745 }
 746 #endif // __ANDROID__