1 /* ScummVM - Graphic Adventure Engine 2 * 3 * ScummVM is the legal property of its developers, whose names 4 * are too numerous to list here. Please refer to the COPYRIGHT 5 * file distributed with this source distribution. 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public License 9 * as published by the Free Software Foundation; either version 2 10 * of the License, or (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. 20 * 21 */ 22 23 #ifndef AGS_ENGINE_AC_TIMER_H 24 #define AGS_ENGINE_AC_TIMER_H 25 26 #include "ags/lib/std/type_traits.h" 27 #include "ags/lib/std/chrono.h" 28 #include "ags/lib/std/xtr1common.h" 29 30 namespace AGS3 { 31 32 // use high resolution clock only if we know it is monotonic/steady. 33 // refer to https://stackoverflow.com/a/38253266/84262 34 using AGS_Clock = std::conditional < 35 std::chrono::high_resolution_clock::is_steady, 36 std::chrono::high_resolution_clock, std::chrono::steady_clock 37 >::type; 38 39 // Sleeps for time remaining until the next game frame, updates next frame timestamp 40 extern void WaitForNextFrame(); 41 42 // Sets real FPS to the given number of frames per second; pass 1000+ for maxed FPS mode 43 extern void setTimerFps(int new_fps); 44 // Tells whether maxed FPS mode is currently set 45 extern bool isTimerFpsMaxed(); 46 // If more than N frames, just skip all, start a fresh. 47 extern void skipMissedTicks(); 48 49 } // namespace AGS3 50 51 #endif 52