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 "clouds.h"
  25 #include "util/numeric.h"
  26 #include "guiscalingfilter.h"
  27 #include "hud.h"
  28 #include "camera.h"
  29 #include "minimap.h"
  30 #include "clientmap.h"
  31 #include "renderingengine.h"
  32 #include "inputhandler.h"
  33 #include "gettext.h"
  34
  35 #if !defined(_WIN32) && !defined(__APPLE__) && !defined(__ANDROID__) && !defined(SERVER)
  36 #define XORG_USED
  37 #endif
  38 #ifdef XORG_USED
  39 #include <X11/Xlib.h>
  40 #include <X11/Xutil.h>
  41 #endif
  42
  43 RenderingEngine *RenderingEngine::s_singleton = nullptr;
  44
  45 RenderingEngine::RenderingEngine(IEventReceiver *receiver)
  46 {
  47         sanity_check(!s_singleton);
  48
  49         // Resolution selection
  50         bool fullscreen = g_settings->getBool("fullscreen");
  51         u16 screen_w = g_settings->getU16("screen_w");
  52         u16 screen_h = g_settings->getU16("screen_h");
  53
  54         // bpp, fsaa, vsync
  55         bool vsync = g_settings->getBool("vsync");
  56         u16 bits = g_settings->getU16("fullscreen_bpp");
  57         u16 fsaa = g_settings->getU16("fsaa");
  58
  59         // stereo buffer required for pageflip stereo
  60         bool stereo_buffer = g_settings->get("3d_mode") == "pageflip";
  61
  62         // Determine driver
  63         video::E_DRIVER_TYPE driverType = video::EDT_OPENGL;
  64         const std::string &driverstring = g_settings->get("video_driver");
  65         std::vector<video::E_DRIVER_TYPE> drivers =
  66                         RenderingEngine::getSupportedVideoDrivers();
  67         u32 i;
  68         for (i = 0; i != drivers.size(); i++) {
  69                 if (!strcasecmp(driverstring.c_str(),
  70                                     RenderingEngine::getVideoDriverName(drivers[i]))) {
  71                         driverType = drivers[i];
  72                         break;
  73                 }
  74         }
  75         if (i == drivers.size()) {
  76                 errorstream << "Invalid video_driver specified; "
  77                                "defaulting to opengl"
  78                             << std::endl;
  79         }
  80
  81         SIrrlichtCreationParameters params = SIrrlichtCreationParameters();
  82         params.DriverType = driverType;
  83         params.WindowSize = core::dimension2d<u32>(screen_w, screen_h);
  84         params.Bits = bits;
  85         params.AntiAlias = fsaa;
  86         params.Fullscreen = fullscreen;
  87         params.Stencilbuffer = false;
  88         params.Stereobuffer = stereo_buffer;
  89         params.Vsync = vsync;
  90         params.EventReceiver = receiver;
  91         params.HighPrecisionFPU = g_settings->getBool("high_precision_fpu");
  92         params.ZBufferBits = 24;
  93 #ifdef __ANDROID__
  94         params.PrivateData = porting::app_global;
  95         params.OGLES2ShaderPath = std::string(
  96                         porting::path_user + DIR_DELIM + "media" + DIR_DELIM + "Shaders" +
  97                         DIR_DELIM).c_str();
  98 #endif
  99
 100         m_device = createDeviceEx(params);
 101         s_singleton = this;
 102 }
 103
 104 RenderingEngine::~RenderingEngine()
 105 {
 106         m_device->drop();
 107         s_singleton = nullptr;
 108 }
 109
 110 v2u32 RenderingEngine::getWindowSize() const
 111 {
 112         return m_device->getVideoDriver()->getScreenSize();
 113 }
 114
 115 void RenderingEngine::setResizable(bool resize)
 116 {
 117         m_device->setResizable(resize);
 118 }
 119
 120 video::IVideoDriver *RenderingEngine::getVideoDriver()
 121 {
 122         return m_device->getVideoDriver();
 123 }
 124
 125 bool RenderingEngine::print_video_modes()
 126 {
 127         IrrlichtDevice *nulldevice;
 128
 129         bool vsync = g_settings->getBool("vsync");
 130         u16 fsaa = g_settings->getU16("fsaa");
 131         MyEventReceiver *receiver = new MyEventReceiver();
 132
 133         SIrrlichtCreationParameters params = SIrrlichtCreationParameters();
 134         params.DriverType = video::EDT_NULL;
 135         params.WindowSize = core::dimension2d<u32>(640, 480);
 136         params.Bits = 24;
 137         params.AntiAlias = fsaa;
 138         params.Fullscreen = false;
 139         params.Stencilbuffer = false;
 140         params.Vsync = vsync;
 141         params.EventReceiver = receiver;
 142         params.HighPrecisionFPU = g_settings->getBool("high_precision_fpu");
 143
 144         nulldevice = createDeviceEx(params);
 145
 146         if (!nulldevice) {
 147                 delete receiver;
 148                 return false;
 149         }
 150
 151         std::cout << _("Available video modes (WxHxD):") << std::endl;
 152
 153         video::IVideoModeList *videomode_list = nulldevice->getVideoModeList();
 154
 155         if (videomode_list != NULL) {
 156                 s32 videomode_count = videomode_list->getVideoModeCount();
 157                 core::dimension2d<u32> videomode_res;
 158                 s32 videomode_depth;
 159                 for (s32 i = 0; i < videomode_count; ++i) {
 160                         videomode_res = videomode_list->getVideoModeResolution(i);
 161                         videomode_depth = videomode_list->getVideoModeDepth(i);
 162                         std::cout << videomode_res.Width << "x" << videomode_res.Height
 163                                   << "x" << videomode_depth << std::endl;
 164                 }
 165
 166                 std::cout << _("Active video mode (WxHxD):") << std::endl;
 167                 videomode_res = videomode_list->getDesktopResolution();
 168                 videomode_depth = videomode_list->getDesktopDepth();
 169                 std::cout << videomode_res.Width << "x" << videomode_res.Height << "x"
 170                           << videomode_depth << std::endl;
 171         }
 172
 173         nulldevice->drop();
 174         delete receiver;
 175
 176         return videomode_list != NULL;
 177 }
 178
 179 void RenderingEngine::setXorgClassHint(
 180                 const video::SExposedVideoData &video_data, const std::string &name)
 181 {
 182 #ifdef XORG_USED
 183         if (video_data.OpenGLLinux.X11Display == NULL)
 184                 return;
 185
 186         XClassHint *classhint = XAllocClassHint();
 187         classhint->res_name = (char *)name.c_str();
 188         classhint->res_class = (char *)name.c_str();
 189
 190         XSetClassHint((Display *)video_data.OpenGLLinux.X11Display,
 191                         video_data.OpenGLLinux.X11Window, classhint);
 192         XFree(classhint);
 193 #endif
 194 }
 195
 196 bool RenderingEngine::setWindowIcon()
 197 {
 198 #if defined(XORG_USED)
 199 #if RUN_IN_PLACE
 200         return setXorgWindowIconFromPath(
 201                         porting::path_share + "/misc/" PROJECT_NAME "-xorg-icon-128.png");
 202 #else
 203         // We have semi-support for reading in-place data if we are
 204         // compiled with RUN_IN_PLACE. Don't break with this and
 205         // also try the path_share location.
 206         return setXorgWindowIconFromPath(
 207                                ICON_DIR "/hicolor/128x128/apps/" PROJECT_NAME ".png") ||
 208                setXorgWindowIconFromPath(porting::path_share + "/misc/" PROJECT_NAME
 209                                                                "-xorg-icon-128.png");
 210 #endif
 211 #elif defined(_WIN32)
 212         const video::SExposedVideoData exposedData =
 213                         m_device->getVideoDriver()->getExposedVideoData();
 214         HWND hWnd; // Window handle
 215
 216         switch (m_device->getVideoDriver()->getDriverType()) {
 217         case video::EDT_DIRECT3D8:
 218                 hWnd = reinterpret_cast<HWND>(exposedData.D3D8.HWnd);
 219                 break;
 220         case video::EDT_DIRECT3D9:
 221                 hWnd = reinterpret_cast<HWND>(exposedData.D3D9.HWnd);
 222                 break;
 223         case video::EDT_OPENGL:
 224                 hWnd = reinterpret_cast<HWND>(exposedData.OpenGLWin32.HWnd);
 225                 break;
 226         default:
 227                 return false;
 228         }
 229
 230         // Load the ICON from resource file
 231         const HICON hicon = LoadIcon(GetModuleHandle(NULL),
 232                         MAKEINTRESOURCE(130) // The ID of the ICON defined in
 233                                              // winresource.rc
 234                         );
 235
 236         if (hicon) {
 237                 SendMessage(hWnd, WM_SETICON, ICON_BIG, reinterpret_cast<LPARAM>(hicon));
 238                 SendMessage(hWnd, WM_SETICON, ICON_SMALL,
 239                                 reinterpret_cast<LPARAM>(hicon));
 240                 return true;
 241         }
 242         return false;
 243 #else
 244         return false;
 245 #endif
 246 }
 247
 248 bool RenderingEngine::setXorgWindowIconFromPath(const std::string &icon_file)
 249 {
 250 #ifdef XORG_USED
 251
 252         video::IVideoDriver *v_driver = m_device->getVideoDriver();
 253
 254         video::IImageLoader *image_loader = NULL;
 255         u32 cnt = v_driver->getImageLoaderCount();
 256         for (u32 i = 0; i < cnt; i++) {
 257                 if (v_driver->getImageLoader(i)->isALoadableFileExtension(
 258                                     icon_file.c_str())) {
 259                         image_loader = v_driver->getImageLoader(i);
 260                         break;
 261                 }
 262         }
 263
 264         if (!image_loader) {
 265                 warningstream << "Could not find image loader for file '" << icon_file
 266                               << "'" << std::endl;
 267                 return false;
 268         }
 269
 270         io::IReadFile *icon_f =
 271                         m_device->getFileSystem()->createAndOpenFile(icon_file.c_str());
 272
 273         if (!icon_f) {
 274                 warningstream << "Could not load icon file '" << icon_file << "'"
 275                               << std::endl;
 276                 return false;
 277         }
 278
 279         video::IImage *img = image_loader->loadImage(icon_f);
 280
 281         if (!img) {
 282                 warningstream << "Could not load icon file '" << icon_file << "'"
 283                               << std::endl;
 284                 icon_f->drop();
 285                 return false;
 286         }
 287
 288         u32 height = img->getDimension().Height;
 289         u32 width = img->getDimension().Width;
 290
 291         size_t icon_buffer_len = 2 + height * width;
 292         long *icon_buffer = new long[icon_buffer_len];
 293
 294         icon_buffer[0] = width;
 295         icon_buffer[1] = height;
 296
 297         for (u32 x = 0; x < width; x++) {
 298                 for (u32 y = 0; y < height; y++) {
 299                         video::SColor col = img->getPixel(x, y);
 300                         long pixel_val = 0;
 301                         pixel_val |= (u8)col.getAlpha() << 24;
 302                         pixel_val |= (u8)col.getRed() << 16;
 303                         pixel_val |= (u8)col.getGreen() << 8;
 304                         pixel_val |= (u8)col.getBlue();
 305                         icon_buffer[2 + x + y * width] = pixel_val;
 306                 }
 307         }
 308
 309         img->drop();
 310         icon_f->drop();
 311
 312         const video::SExposedVideoData &video_data = v_driver->getExposedVideoData();
 313
 314         Display *x11_dpl = (Display *)video_data.OpenGLLinux.X11Display;
 315
 316         if (x11_dpl == NULL) {
 317                 warningstream << "Could not find x11 display for setting its icon."
 318                               << std::endl;
 319                 delete[] icon_buffer;
 320                 return false;
 321         }
 322
 323         Window x11_win = (Window)video_data.OpenGLLinux.X11Window;
 324
 325         Atom net_wm_icon = XInternAtom(x11_dpl, "_NET_WM_ICON", False);
 326         Atom cardinal = XInternAtom(x11_dpl, "CARDINAL", False);
 327         XChangeProperty(x11_dpl, x11_win, net_wm_icon, cardinal, 32, PropModeReplace,
 328                         (const unsigned char *)icon_buffer, icon_buffer_len);
 329
 330         delete[] icon_buffer;
 331
 332 #endif
 333         return true;
 334 }
 335
 336 /*
 337         Draws a screen with a single text on it.
 338         Text will be removed when the screen is drawn the next time.
 339         Additionally, a progressbar can be drawn when percent is set between 0 and 100.
 340 */
 341 void RenderingEngine::_draw_load_screen(const std::wstring &text,
 342                 gui::IGUIEnvironment *guienv, ITextureSource *tsrc, float dtime,
 343                 int percent, bool clouds)
 344 {
 345         v2u32 screensize = RenderingEngine::get_instance()->getWindowSize();
 346
 347         v2s32 textsize(g_fontengine->getTextWidth(text), g_fontengine->getLineHeight());
 348         v2s32 center(screensize.X / 2, screensize.Y / 2);
 349         core::rect<s32> textrect(center - textsize / 2, center + textsize / 2);
 350
 351         gui::IGUIStaticText *guitext =
 352                         guienv->addStaticText(text.c_str(), textrect, false, false);
 353         guitext->setTextAlignment(gui::EGUIA_CENTER, gui::EGUIA_UPPERLEFT);
 354
 355         bool cloud_menu_background = clouds && g_settings->getBool("menu_clouds");
 356         if (cloud_menu_background) {
 357                 g_menuclouds->step(dtime * 3);
 358                 g_menuclouds->render();
 359                 get_video_driver()->beginScene(
 360                                 true, true, video::SColor(255, 140, 186, 250));
 361                 g_menucloudsmgr->drawAll();
 362         } else
 363                 get_video_driver()->beginScene(true, true, video::SColor(255, 0, 0, 0));
 364
 365         // draw progress bar
 366         if ((percent >= 0) && (percent <= 100)) {
 367                 video::ITexture *progress_img = tsrc->getTexture("progress_bar.png");
 368                 video::ITexture *progress_img_bg =
 369                                 tsrc->getTexture("progress_bar_bg.png");
 370
 371                 if (progress_img && progress_img_bg) {
 372 #ifndef __ANDROID__
 373                         const core::dimension2d<u32> &img_size =
 374                                         progress_img_bg->getSize();
 375                         u32 imgW = rangelim(img_size.Width, 200, 600);
 376                         u32 imgH = rangelim(img_size.Height, 24, 72);
 377 #else
 378                         const core::dimension2d<u32> img_size(256, 48);
 379                         float imgRatio = (float)img_size.Height / img_size.Width;
 380                         u32 imgW = screensize.X / 2.2f;
 381                         u32 imgH = floor(imgW * imgRatio);
 382 #endif
 383                         v2s32 img_pos((screensize.X - imgW) / 2,
 384                                         (screensize.Y - imgH) / 2);
 385
 386                         draw2DImageFilterScaled(get_video_driver(), progress_img_bg,
 387                                         core::rect<s32>(img_pos.X, img_pos.Y,
 388                                                         img_pos.X + imgW,
 389                                                         img_pos.Y + imgH),
 390                                         core::rect<s32>(0, 0, img_size.Width,
 391                                                         img_size.Height),
 392                                         0, 0, true);
 393
 394                         draw2DImageFilterScaled(get_video_driver(), progress_img,
 395                                         core::rect<s32>(img_pos.X, img_pos.Y,
 396                                                         img_pos.X + (percent * imgW) / 100,
 397                                                         img_pos.Y + imgH),
 398                                         core::rect<s32>(0, 0,
 399                                                         (percent * img_size.Width) / 100,
 400                                                         img_size.Height),
 401                                         0, 0, true);
 402                 }
 403         }
 404
 405         guienv->drawAll();
 406         get_video_driver()->endScene();
 407         guitext->remove();
 408 }
 409
 410 std::vector<core::vector3d<u32>> RenderingEngine::getSupportedVideoModes()
 411 {
 412         IrrlichtDevice *nulldevice = createDevice(video::EDT_NULL);
 413         sanity_check(nulldevice);
 414
 415         std::vector<core::vector3d<u32>> mlist;
 416         video::IVideoModeList *modelist = nulldevice->getVideoModeList();
 417
 418         s32 num_modes = modelist->getVideoModeCount();
 419         for (s32 i = 0; i != num_modes; i++) {
 420                 core::dimension2d<u32> mode_res = modelist->getVideoModeResolution(i);
 421                 u32 mode_depth = (u32)modelist->getVideoModeDepth(i);
 422                 mlist.push_back(core::vector3d<u32>(
 423                                 mode_res.Width, mode_res.Height, mode_depth));
 424         }
 425
 426         nulldevice->drop();
 427         return mlist;
 428 }
 429
 430 std::vector<irr::video::E_DRIVER_TYPE> RenderingEngine::getSupportedVideoDrivers()
 431 {
 432         std::vector<irr::video::E_DRIVER_TYPE> drivers;
 433
 434         for (int i = 0; i != irr::video::EDT_COUNT; i++) {
 435                 if (irr::IrrlichtDevice::isDriverSupported((irr::video::E_DRIVER_TYPE)i))
 436                         drivers.push_back((irr::video::E_DRIVER_TYPE)i);
 437         }
 438
 439         return drivers;
 440 }
 441
 442 void RenderingEngine::_draw_scene(Camera *camera, Client *client, LocalPlayer *player,
 443                 Hud *hud, Minimap *mapper, gui::IGUIEnvironment *guienv,
 444                 const v2u32 &screensize, const video::SColor &skycolor, bool show_hud,
 445                 bool show_minimap)
 446 {
 447         bool draw_wield_tool =
 448                         (show_hud && (player->hud_flags & HUD_FLAG_WIELDITEM_VISIBLE) &&
 449                                         camera->getCameraMode() < CAMERA_MODE_THIRD);
 450
 451         bool draw_crosshair = ((player->hud_flags & HUD_FLAG_CROSSHAIR_VISIBLE) &&
 452                                (camera->getCameraMode() != CAMERA_MODE_THIRD_FRONT));
 453
 454 #ifdef HAVE_TOUCHSCREENGUI
 455         try {
 456                 draw_crosshair = !g_settings->getBool("touchtarget");
 457         } catch (SettingNotFoundException) {
 458         }
 459 #endif
 460
 461         const std::string &draw_mode = g_settings->get("3d_mode");
 462
 463         if (draw_mode == "anaglyph") {
 464                 draw_anaglyph_3d_mode(
 465                                 camera, show_hud, hud, draw_wield_tool, client, guienv);
 466                 draw_crosshair = false;
 467         } else if (draw_mode == "interlaced") {
 468                 draw_interlaced_3d_mode(camera, show_hud, hud, screensize,
 469                                 draw_wield_tool, client, guienv, skycolor);
 470                 draw_crosshair = false;
 471         } else if (draw_mode == "sidebyside") {
 472                 draw_sidebyside_3d_mode(camera, show_hud, hud, screensize,
 473                                 draw_wield_tool, client, guienv, skycolor);
 474                 show_hud = false;
 475         } else if (draw_mode == "topbottom") {
 476                 draw_top_bottom_3d_mode(camera, show_hud, hud, screensize,
 477                                 draw_wield_tool, client, guienv, skycolor);
 478                 show_hud = false;
 479         } else if (draw_mode == "pageflip") {
 480                 draw_pageflip_3d_mode(camera, show_hud, hud, screensize, draw_wield_tool,
 481                                 client, guienv, skycolor);
 482                 draw_crosshair = false;
 483                 show_hud = false;
 484         } else {
 485                 draw_plain(camera, show_hud, hud, screensize, draw_wield_tool, client,
 486                                 guienv, skycolor);
 487         }
 488
 489         /*
 490                 Post effects
 491         */
 492         client->getEnv().getClientMap().renderPostFx(camera->getCameraMode());
 493
 494         // TODO how to make those 3d too
 495         if (show_hud) {
 496                 if (draw_crosshair)
 497                         hud->drawCrosshair();
 498
 499                 hud->drawHotbar(client->getPlayerItem());
 500                 hud->drawLuaElements(camera->getOffset());
 501                 camera->drawNametags();
 502
 503                 if (mapper && show_minimap)
 504                         mapper->drawMinimap();
 505         }
 506
 507         guienv->drawAll();
 508 }
 509
 510 void RenderingEngine::draw_anaglyph_3d_mode(Camera *camera, bool show_hud, Hud *hud,
 511                 bool draw_wield_tool, Client *client, gui::IGUIEnvironment *guienv)
 512 {
 513
 514         /* preserve old setup*/
 515         irr::core::vector3df oldPosition = camera->getCameraNode()->getPosition();
 516         irr::core::vector3df oldTarget = camera->getCameraNode()->getTarget();
 517
 518         irr::core::matrix4 startMatrix =
 519                         camera->getCameraNode()->getAbsoluteTransformation();
 520         irr::core::vector3df focusPoint =
 521                         (camera->getCameraNode()->getTarget() -
 522                                         camera->getCameraNode()->getAbsolutePosition())
 523                                         .setLength(1) +
 524                         camera->getCameraNode()->getAbsolutePosition();
 525
 526         // Left eye...
 527         irr::core::vector3df leftEye;
 528         irr::core::matrix4 leftMove;
 529         leftMove.setTranslation(irr::core::vector3df(
 530                         -g_settings->getFloat("3d_paralax_strength"), 0.0f, 0.0f));
 531         leftEye = (startMatrix * leftMove).getTranslation();
 532
 533         // clear the depth buffer, and color
 534         getVideoDriver()->beginScene(true, true, irr::video::SColor(0, 200, 200, 255));
 535         getVideoDriver()->getOverrideMaterial().Material.ColorMask = irr::video::ECP_RED;
 536         getVideoDriver()->getOverrideMaterial().EnableFlags = irr::video::EMF_COLOR_MASK;
 537         getVideoDriver()->getOverrideMaterial().EnablePasses =
 538                         irr::scene::ESNRP_SKY_BOX + irr::scene::ESNRP_SOLID +
 539                         irr::scene::ESNRP_TRANSPARENT +
 540                         irr::scene::ESNRP_TRANSPARENT_EFFECT + irr::scene::ESNRP_SHADOW;
 541         camera->getCameraNode()->setPosition(leftEye);
 542         camera->getCameraNode()->setTarget(focusPoint);
 543         get_scene_manager()->drawAll();
 544         getVideoDriver()->setTransform(video::ETS_WORLD, core::IdentityMatrix);
 545         if (show_hud) {
 546                 hud->drawSelectionMesh();
 547                 if (draw_wield_tool)
 548                         camera->drawWieldedTool(&leftMove);
 549         }
 550
 551         guienv->drawAll();
 552
 553         // Right eye...
 554         irr::core::vector3df rightEye;
 555         irr::core::matrix4 rightMove;
 556         rightMove.setTranslation(irr::core::vector3df(
 557                         g_settings->getFloat("3d_paralax_strength"), 0.0f, 0.0f));
 558         rightEye = (startMatrix * rightMove).getTranslation();
 559
 560         // clear the depth buffer
 561         getVideoDriver()->clearZBuffer();
 562         getVideoDriver()->getOverrideMaterial().Material.ColorMask =
 563                         irr::video::ECP_GREEN + irr::video::ECP_BLUE;
 564         getVideoDriver()->getOverrideMaterial().EnableFlags = irr::video::EMF_COLOR_MASK;
 565         getVideoDriver()->getOverrideMaterial().EnablePasses =
 566                         irr::scene::ESNRP_SKY_BOX + irr::scene::ESNRP_SOLID +
 567                         irr::scene::ESNRP_TRANSPARENT +
 568                         irr::scene::ESNRP_TRANSPARENT_EFFECT + irr::scene::ESNRP_SHADOW;
 569         camera->getCameraNode()->setPosition(rightEye);
 570         camera->getCameraNode()->setTarget(focusPoint);
 571         get_scene_manager()->drawAll();
 572         getVideoDriver()->setTransform(video::ETS_WORLD, core::IdentityMatrix);
 573         if (show_hud) {
 574                 hud->drawSelectionMesh();
 575                 if (draw_wield_tool)
 576                         camera->drawWieldedTool(&rightMove);
 577         }
 578
 579         guienv->drawAll();
 580
 581         getVideoDriver()->getOverrideMaterial().Material.ColorMask = irr::video::ECP_ALL;
 582         getVideoDriver()->getOverrideMaterial().EnableFlags = 0;
 583         getVideoDriver()->getOverrideMaterial().EnablePasses = 0;
 584         camera->getCameraNode()->setPosition(oldPosition);
 585         camera->getCameraNode()->setTarget(oldTarget);
 586 }
 587
 588 void RenderingEngine::init_texture(
 589                 const v2u32 &screensize, video::ITexture **texture, const char *name)
 590 {
 591         if (*texture) {
 592                 getVideoDriver()->removeTexture(*texture);
 593         }
 594         *texture = getVideoDriver()->addRenderTargetTexture(
 595                         core::dimension2d<u32>(screensize.X, screensize.Y), name,
 596                         irr::video::ECF_A8R8G8B8);
 597 }
 598
 599 video::ITexture *RenderingEngine::draw_image(const v2u32 &screensize, parallax_sign psign,
 600                 const irr::core::matrix4 &startMatrix,
 601                 const irr::core::vector3df &focusPoint, bool show_hud, Camera *camera,
 602                 Hud *hud, bool draw_wield_tool, Client *client,
 603                 gui::IGUIEnvironment *guienv, const video::SColor &skycolor)
 604 {
 605         static video::ITexture *images[2] = {NULL, NULL};
 606         static v2u32 last_screensize = v2u32(0, 0);
 607
 608         video::ITexture *image = NULL;
 609
 610         if (screensize != last_screensize) {
 611                 init_texture(screensize, &images[1], "mt_drawimage_img1");
 612                 init_texture(screensize, &images[0], "mt_drawimage_img2");
 613                 last_screensize = screensize;
 614         }
 615
 616         if (psign == RIGHT)
 617                 image = images[1];
 618         else
 619                 image = images[0];
 620
 621         getVideoDriver()->setRenderTarget(image, true, true,
 622                         irr::video::SColor(255, skycolor.getRed(), skycolor.getGreen(),
 623                                         skycolor.getBlue()));
 624
 625         irr::core::vector3df eye_pos;
 626         irr::core::matrix4 movement;
 627         movement.setTranslation(irr::core::vector3df(
 628                         (int)psign * g_settings->getFloat("3d_paralax_strength"), 0.0f,
 629                         0.0f));
 630         eye_pos = (startMatrix * movement).getTranslation();
 631
 632         // clear the depth buffer
 633         getVideoDriver()->clearZBuffer();
 634         camera->getCameraNode()->setPosition(eye_pos);
 635         camera->getCameraNode()->setTarget(focusPoint);
 636         get_scene_manager()->drawAll();
 637
 638         getVideoDriver()->setTransform(video::ETS_WORLD, core::IdentityMatrix);
 639
 640         if (show_hud) {
 641                 hud->drawSelectionMesh();
 642                 if (draw_wield_tool)
 643                         camera->drawWieldedTool(&movement);
 644         }
 645
 646         guienv->drawAll();
 647
 648         /* switch back to real renderer */
 649         getVideoDriver()->setRenderTarget(0, true, true,
 650                         irr::video::SColor(0, skycolor.getRed(), skycolor.getGreen(),
 651                                         skycolor.getBlue()));
 652
 653         return image;
 654 }
 655
 656 video::ITexture *RenderingEngine::draw_hud(const v2u32 &screensize, bool show_hud,
 657                 Hud *hud, Client *client, bool draw_crosshair,
 658                 const video::SColor &skycolor, gui::IGUIEnvironment *guienv,
 659                 Camera *camera)
 660 {
 661         static video::ITexture *image = nullptr;
 662         init_texture(screensize, &image, "mt_drawimage_hud");
 663         getVideoDriver()->setRenderTarget(
 664                         image, true, true, irr::video::SColor(255, 0, 0, 0));
 665
 666         if (show_hud) {
 667                 if (draw_crosshair)
 668                         hud->drawCrosshair();
 669                 hud->drawHotbar(client->getPlayerItem());
 670                 hud->drawLuaElements(camera->getOffset());
 671                 camera->drawNametags();
 672                 guienv->drawAll();
 673         }
 674
 675         getVideoDriver()->setRenderTarget(0, true, true,
 676                         irr::video::SColor(0, skycolor.getRed(), skycolor.getGreen(),
 677                                         skycolor.getBlue()));
 678
 679         return image;
 680 }
 681
 682 void RenderingEngine::draw_interlaced_3d_mode(Camera *camera, bool show_hud, Hud *hud,
 683                 const v2u32 &screensize, bool draw_wield_tool, Client *client,
 684                 gui::IGUIEnvironment *guienv, const video::SColor &skycolor)
 685 {
 686         /* save current info */
 687         irr::core::vector3df oldPosition = camera->getCameraNode()->getPosition();
 688         irr::core::vector3df oldTarget = camera->getCameraNode()->getTarget();
 689         irr::core::matrix4 startMatrix =
 690                         camera->getCameraNode()->getAbsoluteTransformation();
 691         irr::core::vector3df focusPoint =
 692                         (camera->getCameraNode()->getTarget() -
 693                                         camera->getCameraNode()->getAbsolutePosition())
 694                                         .setLength(1) +
 695                         camera->getCameraNode()->getAbsolutePosition();
 696
 697         /* create left view */
 698         video::ITexture *left_image = draw_image(screensize, LEFT, startMatrix,
 699                         focusPoint, show_hud, camera, hud, draw_wield_tool, client,
 700                         guienv, skycolor);
 701
 702         // Right eye...
 703         irr::core::vector3df rightEye;
 704         irr::core::matrix4 rightMove;
 705         rightMove.setTranslation(irr::core::vector3df(
 706                         g_settings->getFloat("3d_paralax_strength"), 0.0f, 0.0f));
 707         rightEye = (startMatrix * rightMove).getTranslation();
 708
 709         // clear the depth buffer
 710         getVideoDriver()->clearZBuffer();
 711         camera->getCameraNode()->setPosition(rightEye);
 712         camera->getCameraNode()->setTarget(focusPoint);
 713         get_scene_manager()->drawAll();
 714
 715         getVideoDriver()->setTransform(video::ETS_WORLD, core::IdentityMatrix);
 716
 717         if (show_hud) {
 718                 hud->drawSelectionMesh();
 719                 if (draw_wield_tool)
 720                         camera->drawWieldedTool(&rightMove);
 721         }
 722         guienv->drawAll();
 723
 724         for (unsigned int i = 0; i < screensize.Y; i += 2) {
 725 #if (IRRLICHT_VERSION_MAJOR >= 1) && (IRRLICHT_VERSION_MINOR >= 8)
 726                 getVideoDriver()->draw2DImage(left_image,
 727                                 irr::core::position2d<s32>(0, i),
 728 #else
 729                 getVideoDriver()->draw2DImage(left_image,
 730                                 irr::core::position2d<s32>(0, screensize.Y - i),
 731 #endif
 732                                 irr::core::rect<s32>(0, i, screensize.X, i + 1), 0,
 733                                 irr::video::SColor(255, 255, 255, 255), false);
 734         }
 735
 736         /* cleanup */
 737         camera->getCameraNode()->setPosition(oldPosition);
 738         camera->getCameraNode()->setTarget(oldTarget);
 739 }
 740
 741 void RenderingEngine::draw_sidebyside_3d_mode(Camera *camera, bool show_hud, Hud *hud,
 742                 const v2u32 &screensize, bool draw_wield_tool, Client *client,
 743                 gui::IGUIEnvironment *guienv, const video::SColor &skycolor)
 744 {
 745         /* save current info */
 746         irr::core::vector3df oldPosition = camera->getCameraNode()->getPosition();
 747         irr::core::vector3df oldTarget = camera->getCameraNode()->getTarget();
 748         irr::core::matrix4 startMatrix =
 749                         camera->getCameraNode()->getAbsoluteTransformation();
 750         irr::core::vector3df focusPoint =
 751                         (camera->getCameraNode()->getTarget() -
 752                                         camera->getCameraNode()->getAbsolutePosition())
 753                                         .setLength(1) +
 754                         camera->getCameraNode()->getAbsolutePosition();
 755
 756         /* create left view */
 757         video::ITexture *left_image = draw_image(screensize, LEFT, startMatrix,
 758                         focusPoint, show_hud, camera, hud, draw_wield_tool, client,
 759                         guienv, skycolor);
 760
 761         /* create right view */
 762         video::ITexture *right_image = draw_image(screensize, RIGHT, startMatrix,
 763                         focusPoint, show_hud, camera, hud, draw_wield_tool, client,
 764                         guienv, skycolor);
 765
 766         /* create hud overlay */
 767         video::ITexture *hudtexture = draw_hud(screensize, show_hud, hud, client, false,
 768                         skycolor, guienv, camera);
 769         getVideoDriver()->makeColorKeyTexture(
 770                         hudtexture, irr::video::SColor(255, 0, 0, 0));
 771         // makeColorKeyTexture mirrors texture so we do it twice to get it right again
 772         getVideoDriver()->makeColorKeyTexture(
 773                         hudtexture, irr::video::SColor(255, 0, 0, 0));
 774
 775         draw2DImageFilterScaled(getVideoDriver(), left_image,
 776                         irr::core::rect<s32>(0, 0, screensize.X / 2, screensize.Y),
 777                         irr::core::rect<s32>(0, 0, screensize.X, screensize.Y), 0, 0,
 778                         false);
 779
 780         draw2DImageFilterScaled(getVideoDriver(), hudtexture,
 781                         irr::core::rect<s32>(0, 0, screensize.X / 2, screensize.Y),
 782                         irr::core::rect<s32>(0, 0, screensize.X, screensize.Y), 0, 0,
 783                         true);
 784
 785         draw2DImageFilterScaled(getVideoDriver(), right_image,
 786                         irr::core::rect<s32>(
 787                                         screensize.X / 2, 0, screensize.X, screensize.Y),
 788                         irr::core::rect<s32>(0, 0, screensize.X, screensize.Y), 0, 0,
 789                         false);
 790
 791         draw2DImageFilterScaled(getVideoDriver(), hudtexture,
 792                         irr::core::rect<s32>(
 793                                         screensize.X / 2, 0, screensize.X, screensize.Y),
 794                         irr::core::rect<s32>(0, 0, screensize.X, screensize.Y), 0, 0,
 795                         true);
 796
 797         left_image = nullptr;
 798         right_image = nullptr;
 799
 800         /* cleanup */
 801         camera->getCameraNode()->setPosition(oldPosition);
 802         camera->getCameraNode()->setTarget(oldTarget);
 803 }
 804
 805 void RenderingEngine::draw_top_bottom_3d_mode(Camera *camera, bool show_hud, Hud *hud,
 806                 const v2u32 &screensize, bool draw_wield_tool, Client *client,
 807                 gui::IGUIEnvironment *guienv, const video::SColor &skycolor)
 808 {
 809         /* save current info */
 810         irr::core::vector3df oldPosition = camera->getCameraNode()->getPosition();
 811         irr::core::vector3df oldTarget = camera->getCameraNode()->getTarget();
 812         irr::core::matrix4 startMatrix =
 813                         camera->getCameraNode()->getAbsoluteTransformation();
 814         irr::core::vector3df focusPoint =
 815                         (camera->getCameraNode()->getTarget() -
 816                                         camera->getCameraNode()->getAbsolutePosition())
 817                                         .setLength(1) +
 818                         camera->getCameraNode()->getAbsolutePosition();
 819
 820         /* create left view */
 821         video::ITexture *left_image = draw_image(screensize, LEFT, startMatrix,
 822                         focusPoint, show_hud, camera, hud, draw_wield_tool, client,
 823                         guienv, skycolor);
 824
 825         /* create right view */
 826         video::ITexture *right_image = draw_image(screensize, RIGHT, startMatrix,
 827                         focusPoint, show_hud, camera, hud, draw_wield_tool, client,
 828                         guienv, skycolor);
 829
 830         /* create hud overlay */
 831         video::ITexture *hudtexture = draw_hud(screensize, show_hud, hud, client, false,
 832                         skycolor, guienv, camera);
 833         getVideoDriver()->makeColorKeyTexture(
 834                         hudtexture, irr::video::SColor(255, 0, 0, 0));
 835         // makeColorKeyTexture mirrors texture so we do it twice to get it right again
 836         getVideoDriver()->makeColorKeyTexture(
 837                         hudtexture, irr::video::SColor(255, 0, 0, 0));
 838
 839         draw2DImageFilterScaled(getVideoDriver(), left_image,
 840                         irr::core::rect<s32>(0, 0, screensize.X, screensize.Y / 2),
 841                         irr::core::rect<s32>(0, 0, screensize.X, screensize.Y), 0, 0,
 842                         false);
 843
 844         draw2DImageFilterScaled(getVideoDriver(), hudtexture,
 845                         irr::core::rect<s32>(0, 0, screensize.X, screensize.Y / 2),
 846                         irr::core::rect<s32>(0, 0, screensize.X, screensize.Y), 0, 0,
 847                         true);
 848
 849         draw2DImageFilterScaled(getVideoDriver(), right_image,
 850                         irr::core::rect<s32>(
 851                                         0, screensize.Y / 2, screensize.X, screensize.Y),
 852                         irr::core::rect<s32>(0, 0, screensize.X, screensize.Y), 0, 0,
 853                         false);
 854
 855         draw2DImageFilterScaled(getVideoDriver(), hudtexture,
 856                         irr::core::rect<s32>(
 857                                         0, screensize.Y / 2, screensize.X, screensize.Y),
 858                         irr::core::rect<s32>(0, 0, screensize.X, screensize.Y), 0, 0,
 859                         true);
 860
 861         left_image = NULL;
 862         right_image = NULL;
 863
 864         /* cleanup */
 865         camera->getCameraNode()->setPosition(oldPosition);
 866         camera->getCameraNode()->setTarget(oldTarget);
 867 }
 868
 869 void RenderingEngine::draw_pageflip_3d_mode(Camera *camera, bool show_hud, Hud *hud,
 870                 const v2u32 &screensize, bool draw_wield_tool, Client *client,
 871                 gui::IGUIEnvironment *guienv, const video::SColor &skycolor)
 872 {
 873 #if IRRLICHT_VERSION_MAJOR == 1 && IRRLICHT_VERSION_MINOR > 8
 874         errorstream << "Pageflip 3D mode is not supported"
 875                     << " with your Irrlicht version!" << std::endl;
 876 #else
 877         /* preserve old setup*/
 878         irr::core::vector3df oldPosition = camera->getCameraNode()->getPosition();
 879         irr::core::vector3df oldTarget = camera->getCameraNode()->getTarget();
 880
 881         irr::core::matrix4 startMatrix =
 882                         camera->getCameraNode()->getAbsoluteTransformation();
 883         irr::core::vector3df focusPoint =
 884                         (camera->getCameraNode()->getTarget() -
 885                                         camera->getCameraNode()->getAbsolutePosition())
 886                                         .setLength(1) +
 887                         camera->getCameraNode()->getAbsolutePosition();
 888
 889         // Left eye...
 890         getVideoDriver()->setRenderTarget(irr::video::ERT_STEREO_LEFT_BUFFER);
 891
 892         irr::core::vector3df leftEye;
 893         irr::core::matrix4 leftMove;
 894         leftMove.setTranslation(irr::core::vector3df(
 895                         -g_settings->getFloat("3d_paralax_strength"), 0.0f, 0.0f));
 896         leftEye = (startMatrix * leftMove).getTranslation();
 897
 898         // clear the depth buffer, and color
 899         getVideoDriver()->beginScene(true, true, irr::video::SColor(200, 200, 200, 255));
 900         camera->getCameraNode()->setPosition(leftEye);
 901         camera->getCameraNode()->setTarget(focusPoint);
 902         get_scene_manager()->drawAll();
 903         getVideoDriver()->setTransform(video::ETS_WORLD, core::IdentityMatrix);
 904
 905         if (show_hud) {
 906                 hud->drawSelectionMesh();
 907                 if (draw_wield_tool)
 908                         camera->drawWieldedTool(&leftMove);
 909                 hud->drawHotbar(client->getPlayerItem());
 910                 hud->drawLuaElements(camera->getOffset());
 911                 camera->drawNametags();
 912         }
 913
 914         guienv->drawAll();
 915
 916         // Right eye...
 917         getVideoDriver()->setRenderTarget(irr::video::ERT_STEREO_RIGHT_BUFFER);
 918
 919         irr::core::vector3df rightEye;
 920         irr::core::matrix4 rightMove;
 921         rightMove.setTranslation(irr::core::vector3df(
 922                         g_settings->getFloat("3d_paralax_strength"), 0.0f, 0.0f));
 923         rightEye = (startMatrix * rightMove).getTranslation();
 924
 925         // clear the depth buffer, and color
 926         getVideoDriver()->beginScene(true, true, irr::video::SColor(200, 200, 200, 255));
 927         camera->getCameraNode()->setPosition(rightEye);
 928         camera->getCameraNode()->setTarget(focusPoint);
 929         get_scene_manager()->drawAll();
 930         getVideoDriver()->setTransform(video::ETS_WORLD, core::IdentityMatrix);
 931
 932         if (show_hud) {
 933                 hud->drawSelectionMesh();
 934                 if (draw_wield_tool)
 935                         camera->drawWieldedTool(&rightMove);
 936                 hud->drawHotbar(client->getPlayerItem());
 937                 hud->drawLuaElements(camera->getOffset());
 938                 camera->drawNametags();
 939         }
 940
 941         guienv->drawAll();
 942
 943         camera->getCameraNode()->setPosition(oldPosition);
 944         camera->getCameraNode()->setTarget(oldTarget);
 945 #endif
 946 }
 947
 948 // returns (size / coef), rounded upwards
 949 inline int scaledown(int coef, int size)
 950 {
 951         return (size + coef - 1) / coef;
 952 }
 953
 954 void RenderingEngine::draw_plain(Camera *camera, bool show_hud, Hud *hud,
 955                 const v2u32 &screensize, bool draw_wield_tool, Client *client,
 956                 gui::IGUIEnvironment *guienv, const video::SColor &skycolor)
 957 {
 958         // Undersampling-specific stuff
 959         static video::ITexture *image = NULL;
 960         static v2u32 last_pixelated_size = v2u32(0, 0);
 961         static thread_local int undersampling = g_settings->getU16("undersampling");
 962         v2u32 pixelated_size;
 963         v2u32 dest_size;
 964         if (undersampling > 0) {
 965                 pixelated_size = v2u32(scaledown(undersampling, screensize.X),
 966                                 scaledown(undersampling, screensize.Y));
 967                 dest_size = v2u32(undersampling * pixelated_size.X,
 968                                 undersampling * pixelated_size.Y);
 969                 if (pixelated_size != last_pixelated_size) {
 970                         init_texture(pixelated_size, &image, "mt_drawimage_img1");
 971                         last_pixelated_size = pixelated_size;
 972                 }
 973                 getVideoDriver()->setRenderTarget(image, true, true, skycolor);
 974         }
 975
 976         // Render
 977         get_scene_manager()->drawAll();
 978         getVideoDriver()->setTransform(video::ETS_WORLD, core::IdentityMatrix);
 979         if (show_hud) {
 980                 hud->drawSelectionMesh();
 981                 if (draw_wield_tool) {
 982                         camera->drawWieldedTool();
 983                 }
 984         }
 985
 986         // Upscale lowres render
 987         if (undersampling > 0) {
 988                 getVideoDriver()->setRenderTarget(0, true, true);
 989                 getVideoDriver()->draw2DImage(image,
 990                                 irr::core::rect<s32>(0, 0, dest_size.X, dest_size.Y),
 991                                 irr::core::rect<s32>(0, 0, pixelated_size.X,
 992                                                 pixelated_size.Y));
 993         }
 994 }
 995
 996 const char *RenderingEngine::getVideoDriverName(irr::video::E_DRIVER_TYPE type)
 997 {
 998         static const char *driver_ids[] = {
 999                         "null", "software", "burningsvideo", "direct3d8", "direct3d9",
1000                         "opengl", "ogles1", "ogles2",
1001         };
1002
1003         return driver_ids[type];
1004 }
1005
1006 const char *RenderingEngine::getVideoDriverFriendlyName(irr::video::E_DRIVER_TYPE type)
1007 {
1008         static const char *driver_names[] = {
1009                         "NULL Driver", "Software Renderer", "Burning's Video",
1010                         "Direct3D 8", "Direct3D 9", "OpenGL", "OpenGL ES1", "OpenGL ES2",
1011         };
1012
1013         return driver_names[type];
1014 }
1015
1016 #ifndef __ANDROID__
1017 #ifdef XORG_USED
1018
1019 static float calcDisplayDensity()
1020 {
1021         const char *current_display = getenv("DISPLAY");
1022
1023         if (current_display != NULL) {
1024                 Display *x11display = XOpenDisplay(current_display);
1025
1026                 if (x11display != NULL) {
1027                         /* try x direct */
1028                         float dpi_height = floor(
1029                                         DisplayHeight(x11display, 0) /
1030                                                         (DisplayHeightMM(x11display, 0) *
1031                                                                         0.039370) +
1032                                         0.5);
1033                         float dpi_width = floor(
1034                                         DisplayWidth(x11display, 0) /
1035                                                         (DisplayWidthMM(x11display, 0) *
1036                                                                         0.039370) +
1037                                         0.5);
1038
1039                         XCloseDisplay(x11display);
1040
1041                         return std::max(dpi_height, dpi_width) / 96.0;
1042                 }
1043         }
1044
1045         /* return manually specified dpi */
1046         return g_settings->getFloat("screen_dpi") / 96.0;
1047 }
1048
1049 float RenderingEngine::getDisplayDensity()
1050 {
1051         static float cached_display_density = calcDisplayDensity();
1052         return cached_display_density;
1053 }
1054
1055 #else  // XORG_USED
1056 float RenderingEngine::getDisplayDensity()
1057 {
1058         return g_settings->getFloat("screen_dpi") / 96.0;
1059 }
1060 #endif // XORG_USED
1061
1062 v2u32 RenderingEngine::getDisplaySize()
1063 {
1064         IrrlichtDevice *nulldevice = createDevice(video::EDT_NULL);
1065
1066         core::dimension2d<u32> deskres =
1067                         nulldevice->getVideoModeList()->getDesktopResolution();
1068         nulldevice->drop();
1069
1070         return deskres;
1071 }
1072 #endif // __ANDROID__