X-Git-Url: https://git.verplant.org/?a=blobdiff_plain;f=src%2Fmainloop.cpp;h=4d32e54ff627200396db98a293f010c1ac3e8545;hb=eba22158410e664ad102c7542e333d00dcb80cc3;hp=5e2f3f76a9a531364648697a8baf27167b303151;hpb=7c579d3ef0a6667c18b53dad84c63c05d2760a84;p=supertux.git

diff --git a/src/mainloop.cpp b/src/mainloop.cpp
index 5e2f3f76a..4d32e54ff 100644
--- a/src/mainloop.cpp
+++ b/src/mainloop.cpp
@@ -20,7 +20,7 @@
 
 #include "mainloop.hpp"
 
-#include <cstdlib>
+#include <stdlib.h>
 #include <SDL.h>
 #include "video/drawing_context.hpp"
 #include "control/joystickkeyboardcontroller.hpp"
@@ -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), fps(0)
+  : speed(1.0), nextpop(false), nextpush(false), fps(0), screenshot_requested(false)
 {
   using namespace Scripting;
   TimeScheduler::instance = new TimeScheduler();
@@ -109,6 +111,12 @@ MainLoop::set_speed(float speed)
   this->speed = speed;
 }
 
+float
+MainLoop::get_speed() const
+{
+  return speed;
+}
+
 void
 MainLoop::draw_fps(DrawingContext& context, float fps_fps)
 {
@@ -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 */
@@ -177,6 +190,9 @@ MainLoop::process_events()
       config->use_fullscreen = !config->use_fullscreen;
       init_video();
     }
+    else if (event.type == SDL_KEYDOWN && event.key.keysym.sym == SDLK_PRINT) {
+      take_screenshot();
+    }
   }
 }
 
@@ -214,10 +230,8 @@ MainLoop::handle_screen_switch()
 }
 
 void
-MainLoop::run()
+MainLoop::run(DrawingContext &context)
 {
-  DrawingContext context;
-
   Uint32 last_ticks = 0;
   Uint32 elapsed_ticks = 0;
 
@@ -232,7 +246,9 @@ MainLoop::run()
     elapsed_ticks += ticks - last_ticks;
     last_ticks = ticks;
 
-    if (elapsed_ticks > TICKS_PER_FRAME*4) {
+    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 extremly large, so we just ignore those
       // large time jumps
@@ -241,24 +257,33 @@ MainLoop::run()
 
     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;
+    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);
       }
 
-      draw(context);
-    }
-
     sound_manager->update();
 
     SDL_Delay(0);
   }
 }
+
+void 
+MainLoop::take_screenshot()
+{
+  screenshot_requested = true;
+}
+