X-Git-Url: https://git.verplant.org/?a=blobdiff_plain;f=src%2Fmainloop.cpp;h=4d32e54ff627200396db98a293f010c1ac3e8545;hb=eba22158410e664ad102c7542e333d00dcb80cc3;hp=2001a143a9748109ce30cf489dbe7456f9449546;hpb=7fbc38d9c2fda9bfb10eeb7ecb3db36c3daa2824;p=supertux.git

diff --git a/src/mainloop.cpp b/src/mainloop.cpp
index 2001a143a..4d32e54ff 100644
--- a/src/mainloop.cpp
+++ b/src/mainloop.cpp
@@ -46,10 +46,12 @@ 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), nextpop(false), nextpush(false)
+  : speed(1.0), nextpop(false), nextpush(false), fps(0), screenshot_requested(false)
 {
   using namespace Scripting;
   TimeScheduler::instance = new TimeScheduler();
@@ -109,14 +111,20 @@ 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_HUD);
-  context.draw_text(gold_text, str, Vector(SCREEN_WIDTH - BORDER_X, BORDER_Y + 20), RIGHT_ALLIGN, LAYER_HUD);
+  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), ALIGN_LEFT, LAYER_HUD);
+  context.draw_text(gold_text, str, Vector(SCREEN_WIDTH - BORDER_X, BORDER_Y + 20), ALIGN_RIGHT, LAYER_HUD);
 }
 
 void
@@ -135,6 +143,11 @@ MainLoop::draw(DrawingContext& context)
   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 */
@@ -173,6 +186,13 @@ MainLoop::process_events()
       Menu::current()->event(event);
     if(event.type == SDL_QUIT)
       quit();
+    else if (event.type == SDL_KEYDOWN && event.key.keysym.sym == SDLK_F11) {
+      config->use_fullscreen = !config->use_fullscreen;
+      init_video();
+    }
+    else if (event.type == SDL_KEYDOWN && event.key.keysym.sym == SDLK_PRINT) {
+      take_screenshot();
+    }
   }
 }
 
@@ -210,13 +230,10 @@ MainLoop::handle_screen_switch()
 }
 
 void
-MainLoop::run()
+MainLoop::run(DrawingContext &context)
 {
-  DrawingContext context;
-
-  Uint32 last_ticks;
+  Uint32 last_ticks = 0;
   Uint32 elapsed_ticks = 0;
-  int skipped_frames = 0;
 
   running = true;
   while(running) {
@@ -229,34 +246,44 @@ MainLoop::run()
     elapsed_ticks += ticks - last_ticks;
     last_ticks = ticks;
 
-    /* time for a new logical frame? */
-    if(elapsed_ticks > TICKS_PER_FRAME) {
-      elapsed_ticks -= TICKS_PER_FRAME;
-      float timestep = 1.0 / LOGICAL_FPS;
-      real_time += timestep;
-      timestep *= speed;
-      game_time += timestep;
+    Uint32 ticks_per_frame = (Uint32) (TICKS_PER_FRAME * game_speed);
 
-      process_events();
-      update_gamelogic(timestep);
+    if (elapsed_ticks > ticks_per_frame*4) {
+      // when the game loads up or levels are switched the
+      // elapsed_ticks grows extremly large, so we just ignore those
+      // large time jumps
+      elapsed_ticks = 0;
     }
 
-    if(elapsed_ticks > TICKS_PER_FRAME) {
-      // too much time passed since last frame, the computer doesn't seem to be
-      // able to draw 64fps on screen, so skip 1 frame for now
-      skipped_frames++;
+    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;
+          }
 
-      // slow down the game if we skip too many frames
-      if(skipped_frames > MAX_FRAME_SKIP) {
-        elapsed_ticks = elapsed_ticks % TICKS_PER_FRAME;
         draw(context);
-        skipped_frames = 0;
       }
-    } else {
-      draw(context);
-      skipped_frames = 0;
-    }
 
     sound_manager->update();
+
+    SDL_Delay(0);
   }
 }
+
+void 
+MainLoop::take_screenshot()
+{
+  screenshot_requested = true;
+}
+