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- /* libsegl - Sebas Extended GL Library
- * Collection of Opengl/3D-Math helpers
- *
- * Copyright (c) 2008 by Sebastian Lohff, seba@seba-geek.de
- * http://www.seba-geek.de
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the
- * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- * Boston, MA 02110-1301, USA.
- */
-
- #include "fpsmanager.h"
-
- namespace segl {
-
- FPSManager::FPSManager(int _fps) {
- setFPS(_fps);
- frames = 0;
- framerate = 0;
- lastticks = SDL_GetTicks();
- }
-
- void FPSManager::setFPS(int _fps) {
- if(_fps<1 || _fps > 500)
- return;
- tickrate = 1000.0f/(float)_fps;
- }
-
- void FPSManager::delay() {
- frames++;
-
- Uint32 now = SDL_GetTicks();
- Uint32 target = lastticks + (Uint32)(tickrate * (float)frames);
-
- if(now <= target) {
- SDL_Delay(target-now);
- } else {
- framerate = frames/((now-lastticks)/1000.0f);
- frames = 0;
- lastticks = SDL_GetTicks();
- }
- }
-
- float FPSManager::getFPS() {
- return framerate;
- }
-
- } // namespace segl
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