diff options
Diffstat (limited to 'src/lib/JEDI-SDL/SDL/Pas/sdlticks.pas')
| -rw-r--r-- | src/lib/JEDI-SDL/SDL/Pas/sdlticks.pas | 197 |
1 files changed, 0 insertions, 197 deletions
diff --git a/src/lib/JEDI-SDL/SDL/Pas/sdlticks.pas b/src/lib/JEDI-SDL/SDL/Pas/sdlticks.pas deleted file mode 100644 index a479b493..00000000 --- a/src/lib/JEDI-SDL/SDL/Pas/sdlticks.pas +++ /dev/null @@ -1,197 +0,0 @@ -unit sdlticks; -{ - $Id: sdlticks.pas,v 1.2 2006/11/08 08:22:48 savage Exp $ - -} -{******************************************************************************} -{ } -{ JEDI-SDL : Pascal units for SDL - Simple DirectMedia Layer } -{ SDL GetTicks Class Wrapper } -{ } -{ } -{ The initial developer of this Pascal code was : } -{ Dominique Louis <Dominique@SavageSoftware.com.au> } -{ } -{ Portions created by Dominique Louis are } -{ Copyright (C) 2004 - 2100 Dominique Louis. } -{ } -{ } -{ Contributor(s) } -{ -------------- } -{ Dominique Louis <Dominique@SavageSoftware.com.au> } -{ } -{ Obtained through: } -{ Joint Endeavour of Delphi Innovators ( Project JEDI ) } -{ } -{ You may retrieve the latest version of this file at the Project } -{ JEDI home page, located at http://delphi-jedi.org } -{ } -{ The contents of this file are used with permission, subject to } -{ the Mozilla Public License Version 1.1 (the "License"); you may } -{ not use this file except in compliance with the License. You may } -{ obtain a copy of the License at } -{ http://www.mozilla.org/MPL/MPL-1.1.html } -{ } -{ Software distributed under the License is distributed on an } -{ "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or } -{ implied. See the License for the specific language governing } -{ rights and limitations under the License. } -{ } -{ Description } -{ ----------- } -{ SDL Window Wrapper } -{ } -{ } -{ Requires } -{ -------- } -{ SDL.dll on Windows platforms } -{ libSDL-1.1.so.0 on Linux platform } -{ } -{ Programming Notes } -{ ----------------- } -{ } -{ } -{ } -{ } -{ Revision History } -{ ---------------- } -{ } -{ September 23 2004 - DL : Initial Creation } -{ - $Log: sdlticks.pas,v $ - Revision 1.2 2006/11/08 08:22:48 savage - updates tp sdlgameinterface and sdlticks functions. - - Revision 1.1 2004/09/30 22:35:47 savage - Changes, enhancements and additions as required to get SoAoS working. - -} -{******************************************************************************} - -interface - -uses - sdl; - -type - TSDLTicks = class - private - FStartTime : UInt32; - FTicksPerSecond : UInt32; - FElapsedLastTime : UInt32; - FFPSLastTime : UInt32; - FLockFPSLastTime : UInt32; - public - constructor Create; - destructor Destroy; override; // destructor - - {***************************************************************************** - Init - If the hi-res timer is present, the tick rate is stored and the function - returns true. Otherwise, the function returns false, and the timer should - not be used. - *****************************************************************************} - function Init : boolean; - - {*************************************************************************** - GetGetElapsedSeconds - Returns the Elapsed time, since the function was last called. - ***************************************************************************} - function GetElapsedSeconds : Single; - - {*************************************************************************** - GetFPS - Returns the average frames per second. - If this is not called every frame, the client should track the number - of frames itself, and reset the value after this is called. - ***************************************************************************} - function GetFPS : single; - - {*************************************************************************** - LockFPS - Used to lock the frame rate to a set amount. This will block until enough - time has passed to ensure that the fps won't go over the requested amount. - Note that this can only keep the fps from going above the specified level; - it can still drop below it. It is assumed that if used, this function will - be called every frame. The value returned is the instantaneous fps, which - will be less than or equal to the targetFPS. - ***************************************************************************} - procedure LockFPS( targetFPS : Byte ); - end; - -implementation - -{ TSDLTicks } -constructor TSDLTicks.Create; -begin - inherited; - FTicksPerSecond := 1000; -end; - -destructor TSDLTicks.Destroy; -begin - inherited; -end; - -function TSDLTicks.GetElapsedSeconds : Single; -var - currentTime : Cardinal; -begin - currentTime := SDL_GetTicks; - - result := ( currentTime - FElapsedLastTime ) / FTicksPerSecond; - - // reset the timer - FElapsedLastTime := currentTime; -end; - -function TSDLTicks.GetFPS : Single; -var - currentTime, FrameTime : UInt32; - fps : single; -begin - currentTime := SDL_GetTicks; - - FrameTime := ( currentTime - FFPSLastTime ); - - if FrameTime = 0 then - FrameTime := 1; - - fps := FTicksPerSecond / FrameTime; - - // reset the timer - FFPSLastTime := currentTime; - result := fps; -end; - -function TSDLTicks.Init : boolean; -begin - FStartTime := SDL_GetTicks; - FElapsedLastTime := FStartTime; - FFPSLastTime := FStartTime; - FLockFPSLastTime := FStartTime; - result := true; -end; - -procedure TSDLTicks.LockFPS( targetFPS : Byte ); -var - currentTime : UInt32; - targetTime : single; -begin - if ( targetFPS = 0 ) then - targetFPS := 1; - - targetTime := FTicksPerSecond / targetFPS; - - // delay to maintain a constant frame rate - repeat - currentTime := SDL_GetTicks; - until ( ( currentTime - FLockFPSLastTime ) > targetTime ); - - // reset the timer - FLockFPSLastTime := currentTime; -end; - -end. - -
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