Added framerate limiter, off by default (0 means no limit)

1 files changed, 20 insertions, 0 deletions

diff --git a/src/main.cpp b/src/main.cpp
index 8c871b6a..505cc647 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -68,6 +68,7 @@ unsigned char screen_mode;
 char *homeDir = NULL;
 int displayFlags, screenW, screenH, bitDepth;
 bool useOpenGL = false;
+volatile int framesToDraw = 0;
 
 Sound sound;
 Music *bgm;
@@ -77,6 +78,15 @@ Logger *logger;              /**< Log object */
 ItemManager *itemDb;          /**< Item database object */
 
 /**
+ * Allows the next frame to be drawn (part of framerate limiting)
+ */
+Uint32 nextFrame(Uint32 interval, void *param)
+{
+    framesToDraw++;
+    return interval;
+}
+
+/**
  * Listener used for responding to map start error dialog.
  */
 class MapStartErrorListener : public gcn::ActionListener {
@@ -159,6 +169,7 @@ void init_engine()
     config.setValue("remember", 1);
     config.setValue("sfxVolume", 100);
     config.setValue("musicVolume", 60);
+    config.setValue("fpslimit", 0);
 
     // Checking if the configuration file exists... otherwise creates it with
     // default options !
@@ -296,6 +307,15 @@ void init_engine()
         new OkDialog("Sound Engine", err, &initWarningListener);
         logger->log("Warning: %s", err);
     }
+
+    // Set frame counter when using fps limit
+    int fpsLimit = (int)config.getValue("fpslimit", 0);
+    if (fpsLimit)
+    {
+        if (fpsLimit < 20) fpsLimit = 20;
+        if (fpsLimit > 200) fpsLimit = 200;
+        SDL_AddTimer(1000 / fpsLimit, nextFrame, NULL);
+    }
 }
 
 /** Clear the engine */