X-Git-Url: https://git.verplant.org/?a=blobdiff_plain;f=src%2Fmainloop.cpp;h=f291e2807f16ba2f214d7ebfd98212d24d76c04f;hb=c13404a6b6a97ad0d5e1c9f905d7a7e37b797c13;hp=4e7199d404135a174247cadf929ebdbc5f323e30;hpb=f056506f67cb19f8c849917342f67d5d3f34be9b;p=supertux.git

diff --git a/src/mainloop.cpp b/src/mainloop.cpp
index 4e7199d40..f291e2807 100644
--- a/src/mainloop.cpp
+++ b/src/mainloop.cpp
@@ -26,29 +26,41 @@
 #include "control/joystickkeyboardcontroller.hpp"
 #include "gui/menu.hpp"
 #include "audio/sound_manager.hpp"
+#include "scripting/time_scheduler.hpp"
+#include "scripting/squirrel_util.hpp"
 #include "gameconfig.hpp"
+#include "constants.hpp"
 #include "main.hpp"
 #include "resources.hpp"
-#include "script_manager.hpp"
 #include "screen.hpp"
 #include "screen_fade.hpp"
 #include "timer.hpp"
 #include "player_status.hpp"
+#include "video/renderer.hpp"
+#include "random_generator.hpp"
 
-// the engine will be run with a logical framerate of 64fps.
-// We chose 64fps here because it is a power of 2, so 1/64 gives an "even"
-// binary fraction...
-static const float LOGICAL_FPS = 64.0;
+/** ticks (as returned from SDL_GetTicks) per frame */
+static const Uint32 TICKS_PER_FRAME = (Uint32) (1000.0 / LOGICAL_FPS);
+/** don't skip more than every 2nd frame */
+static const int MAX_FRAME_SKIP = 2;
+
+float game_speed = 1.0f;
 
 MainLoop* main_loop = NULL;
 
 MainLoop::MainLoop()
-  : speed(1.0)
+  : speed(1.0), nextpop(false), nextpush(false), fps(0), screenshot_requested(false)
 {
+  using namespace Scripting;
+  TimeScheduler::instance = new TimeScheduler();
 }
 
 MainLoop::~MainLoop()
 {
+  using namespace Scripting;
+  delete TimeScheduler::instance;
+  TimeScheduler::instance = NULL;
+
   for(std::vector<Screen*>::iterator i = screen_stack.begin();
       i != screen_stack.end(); ++i) {
     delete *i;
@@ -60,8 +72,9 @@ MainLoop::push_screen(Screen* screen, ScreenFade* screen_fade)
 {
   this->next_screen.reset(screen);
   this->screen_fade.reset(screen_fade);
+  nextpush = !nextpop;
   nextpop = false;
-  speed = 1.0;
+  speed = 1.0f;
 }
 
 void
@@ -70,6 +83,7 @@ MainLoop::exit_screen(ScreenFade* screen_fade)
   next_screen.reset(NULL);
   this->screen_fade.reset(screen_fade);
   nextpop = true;
+  nextpush = false;
 }
 
 void
@@ -95,131 +109,215 @@ MainLoop::set_speed(float speed)
   this->speed = speed;
 }
 
+float
+MainLoop::get_speed() const
+{
+  return speed;
+}
+
 void
 MainLoop::draw_fps(DrawingContext& context, float fps_fps)
 {
   char str[60];
   snprintf(str, sizeof(str), "%3.1f", fps_fps);
   const char* fpstext = "FPS";
-  context.draw_text(white_text, fpstext, Vector(SCREEN_WIDTH - white_text->get_text_width(fpstext) - gold_text->get_text_width(" 99999") - BORDER_X, BORDER_Y + 20), LEFT_ALLIGN, LAYER_FOREGROUND1);
-  context.draw_text(gold_text, str, Vector(SCREEN_WIDTH - BORDER_X, BORDER_Y + 20), RIGHT_ALLIGN, LAYER_FOREGROUND1);                    
+  context.draw_text(small_font, fpstext, Vector(SCREEN_WIDTH - small_font->get_text_width(fpstext) - small_font->get_text_width(" 99999") - BORDER_X, BORDER_Y + 20), ALIGN_LEFT, LAYER_HUD);
+  context.draw_text(small_font, str, Vector(SCREEN_WIDTH - BORDER_X, BORDER_Y + 20), ALIGN_RIGHT, LAYER_HUD);
 }
 
 void
-MainLoop::run()
+MainLoop::draw(DrawingContext& context)
 {
-  DrawingContext context; 
-  
-  unsigned int frame_count;
-  float fps_fps = 0;
-  Uint32 fps_ticks = SDL_GetTicks();
-  Uint32 fps_nextframe_ticks = SDL_GetTicks();
-  Uint32 ticks;
-  bool skipdraw = false;
-  
-  running = true;
-  while(running) {
-    if( (next_screen.get() != NULL || nextpop == true) &&
-            (screen_fade.get() == NULL || screen_fade->done())) {
-      if(current_screen.get() != NULL) {
-        current_screen->leave();
-      }
+  static Uint32 fps_ticks = SDL_GetTicks();
+  static int frame_count = 0;
 
-      if(nextpop) {
-        if(screen_stack.empty()) {
-          running = false;
-          break;
-        }
-        next_screen.reset(screen_stack.back());
-        screen_stack.pop_back();
-        nextpop = false;
-        speed = 1.0;
-      } else if(current_screen.get() != NULL) {
-        screen_stack.push_back(current_screen.release());
-      }
-      
-      next_screen->setup();
-      ScriptManager::instance->fire_wakeup_event(ScriptManager::SCREEN_SWITCHED);
-      current_screen.reset(next_screen.release());
-      next_screen.reset(NULL);
-      screen_fade.reset(NULL);
-    }
+  current_screen->draw(context);
+  if(Menu::current() != NULL)
+    Menu::current()->draw(context);
+  if(screen_fade.get() != NULL)
+    screen_fade->draw(context);
+  Console::instance->draw(context);
 
-    if(current_screen.get() == NULL)
-        break;
-      
-    float elapsed_time = 1.0 / LOGICAL_FPS;
-    ticks = SDL_GetTicks();
-    if(ticks > fps_nextframe_ticks) {
-      if(skipdraw == true) {
-        // already skipped last frame? we have to slow down the game then...
-        skipdraw = false;
-        fps_nextframe_ticks -= (Uint32) (1000.0 / LOGICAL_FPS);
-      } else {
-        // don't draw all frames when we're getting too slow
-        skipdraw = true;
-      }
-    } else {
-      skipdraw = false;
-      while(fps_nextframe_ticks > ticks) {
-        /* just wait */
-        // If we really have to wait long, then do an imprecise SDL_Delay()
-        Uint32 diff = fps_nextframe_ticks - ticks;
-        if(diff > 10) {
-          SDL_Delay(diff - 2);
-        }
-        ticks = SDL_GetTicks();
-      }
+  if(config->show_fps)
+    draw_fps(context, fps);
+
+  // if a screenshot was requested, pass request on to drawing_context
+  if (screenshot_requested) {
+    context.take_screenshot();
+    screenshot_requested = false;
+  }
+  context.do_drawing();
+
+  /* Calculate frames per second */
+  if(config->show_fps)
+  {
+    ++frame_count;
+
+    if(SDL_GetTicks() - fps_ticks >= 500)
+    {
+      fps = (float) frame_count / .5;
+      frame_count = 0;
+      fps_ticks = SDL_GetTicks();
     }
-    fps_nextframe_ticks = ticks + (Uint32) (1000.0 / LOGICAL_FPS);
+  }
+}
 
-    if(!skipdraw) {
-      current_screen->draw(context);
-      if(Menu::current() != NULL)
-        Menu::current()->draw(context);
-      if(screen_fade.get() != NULL)
-        screen_fade->draw(context);
-      Console::instance->draw(context);
+void
+MainLoop::update_gamelogic(float elapsed_time)
+{
+  Scripting::update_debugger();
+  Scripting::TimeScheduler::instance->update(game_time);
+  current_screen->update(elapsed_time);
+  if (Menu::current() != NULL)
+  	Menu::current()->update();
+  if(screen_fade.get() != NULL)
+    screen_fade->update(elapsed_time);
+  Console::instance->update(elapsed_time);
+}
 
-      if(config->show_fps)
-        draw_fps(context, fps_fps);
+void
+MainLoop::process_events()
+{
+  main_controller->update();
+  Uint8* keystate = SDL_GetKeyState(NULL);
+  SDL_Event event;
+  while(SDL_PollEvent(&event)) 
+    {
+      main_controller->process_event(event);
 
-      context.do_drawing();
+      if(Menu::current() != NULL)
+        Menu::current()->event(event);
 
-      /* Calculate frames per second */
-      if(config->show_fps)
-      {
-        ++frame_count;
-        
-        if(SDL_GetTicks() - fps_ticks >= 500)
+      switch(event.type)
         {
-          fps_fps = (float) frame_count / .5;
-          frame_count = 0;
-          fps_ticks = SDL_GetTicks();
+          case SDL_QUIT:
+            quit();
+            break;
+              
+          case SDL_VIDEORESIZE:
+            Renderer::instance()->resize(event.resize.w, event.resize.h);
+            Menu::recalc_pos();
+            break;
+            
+          case SDL_KEYDOWN:
+            if (event.key.keysym.sym == SDLK_F10)
+              {
+                config->show_fps = !config->show_fps;
+              }
+            if (event.key.keysym.sym == SDLK_F11) 
+              {
+                config->use_fullscreen = !config->use_fullscreen;
+                init_video();
+                Menu::recalc_pos();
+              }
+            else if (event.key.keysym.sym == SDLK_PRINT ||
+                     event.key.keysym.sym == SDLK_F12)
+              {
+                take_screenshot();
+              }
+            else if (event.key.keysym.sym == SDLK_F1 &&
+                     (keystate[SDLK_LCTRL] || keystate[SDLK_RCTRL]) &&
+                     keystate[SDLK_c])
+              {
+                Console::instance->toggle();
+                config->console_enabled = true;
+                config->save();
+              }
+            break;
         }
+    }
+}
+
+void
+MainLoop::handle_screen_switch()
+{
+  while( (next_screen.get() != NULL || nextpop) &&
+      (screen_fade.get() == NULL || screen_fade->done())) {
+    if(current_screen.get() != NULL) {
+      current_screen->leave();
+    }
+
+    if(nextpop) {
+      if(screen_stack.empty()) {
+        running = false;
+        break;
       }
+      next_screen.reset(screen_stack.back());
+      screen_stack.pop_back();
+    }
+    if(nextpush && current_screen.get() != NULL) {
+      screen_stack.push_back(current_screen.release());
     }
 
-    elapsed_time *= speed;
-
-    game_time += elapsed_time;
-    ScriptManager::instance->update();
-    current_screen->update(elapsed_time);
-    if(screen_fade.get() != NULL)
-      screen_fade->update(elapsed_time);
-    Console::instance->update(elapsed_time);
- 
-    main_controller->update();
-    SDL_Event event;
-    while(SDL_PollEvent(&event)) {
-      main_controller->process_event(event);
-      if(Menu::current() != NULL)
-        Menu::current()->event(event);
-      if(event.type == SDL_QUIT)
-        quit();
+    nextpush = false;
+    nextpop = false;
+    speed = 1.0;
+    Screen* next_screen_ptr = next_screen.release();
+    next_screen.reset(0);
+    if(next_screen_ptr)
+      next_screen_ptr->setup();
+    current_screen.reset(next_screen_ptr);
+    screen_fade.reset(NULL);
+
+    waiting_threads.wakeup();
+  }
+}
+
+void
+MainLoop::run(DrawingContext &context)
+{
+  Uint32 last_ticks = 0;
+  Uint32 elapsed_ticks = 0;
+
+  running = true;
+  while(running) {
+
+    handle_screen_switch();
+    if(!running || current_screen.get() == NULL)
+      break;
+
+    Uint32 ticks = SDL_GetTicks();
+    elapsed_ticks += ticks - last_ticks;
+    last_ticks = ticks;
+
+    Uint32 ticks_per_frame = (Uint32) (TICKS_PER_FRAME * game_speed);
+
+    if (elapsed_ticks > ticks_per_frame*4) {
+      // when the game loads up or levels are switched the
+      // elapsed_ticks grows extremely large, so we just ignore those
+      // large time jumps
+      elapsed_ticks = 0;
     }
 
+    int frames = 0;
+
+    if (elapsed_ticks > ticks_per_frame) 
+      {
+        while(elapsed_ticks > ticks_per_frame && frames < MAX_FRAME_SKIP) 
+          {
+            elapsed_ticks -= ticks_per_frame;
+            float timestep = 1.0 / LOGICAL_FPS;
+            real_time += timestep;
+            timestep *= speed;
+            game_time += timestep;
+
+            process_events();
+            update_gamelogic(timestep);
+            frames += 1;
+          }
+
+        draw(context);
+      }
+
     sound_manager->update();
+
+    SDL_Delay(0);
   }
 }
 
+void 
+MainLoop::take_screenshot()
+{
+  screenshot_requested = true;
+}
+