mirror of
https://github.com/vcmi/vcmi.git
synced 2024-11-28 08:48:48 +02:00
db65d9ee15
* CLodHandler init cleared up (a bit) * giveDef optimized * horizontal slider * printAtMiddle updates corrrect rect * adjusted shadows * parts of advanced options menu * minor fixes/improvements
85 lines
1.5 KiB
C++
85 lines
1.5 KiB
C++
|
|
/*
|
|
|
|
SDL_framerate: framerate manager
|
|
|
|
LGPL (c) A. Schiffler
|
|
|
|
*/
|
|
#include "stdafx.h"
|
|
#include "SDL_framerate.h"
|
|
|
|
/*
|
|
Initialize the framerate manager
|
|
*/
|
|
|
|
void SDL_initFramerate(FPSmanager * manager)
|
|
{
|
|
/*
|
|
* Store some sane values
|
|
*/
|
|
manager->framecount = 0;
|
|
manager->rate = FPS_DEFAULT;
|
|
manager->rateticks = (1000.0 / (float) FPS_DEFAULT);
|
|
manager->lastticks = SDL_GetTicks();
|
|
}
|
|
|
|
/*
|
|
Set the framerate in Hz
|
|
*/
|
|
|
|
int SDL_setFramerate(FPSmanager * manager, int rate)
|
|
{
|
|
if ((rate >= FPS_LOWER_LIMIT) && (rate <= FPS_UPPER_LIMIT)) {
|
|
manager->framecount = 0;
|
|
manager->rate = rate;
|
|
manager->rateticks = (1000.0 / (float) rate);
|
|
return (0);
|
|
} else {
|
|
return (-1);
|
|
}
|
|
}
|
|
|
|
/*
|
|
Return the current target framerate in Hz
|
|
*/
|
|
|
|
int SDL_getFramerate(FPSmanager * manager)
|
|
{
|
|
if (manager == NULL) {
|
|
return (-1);
|
|
} else {
|
|
return (manager->rate);
|
|
}
|
|
}
|
|
|
|
/*
|
|
Delay execution to maintain a constant framerate. Calculate fps.
|
|
*/
|
|
|
|
void SDL_framerateDelay(FPSmanager * manager)
|
|
{
|
|
Uint32 current_ticks;
|
|
Uint32 target_ticks;
|
|
Uint32 the_delay;
|
|
|
|
/*
|
|
* Next frame
|
|
*/
|
|
manager->framecount++;
|
|
|
|
/*
|
|
* Get/calc ticks
|
|
*/
|
|
current_ticks = SDL_GetTicks();
|
|
target_ticks = manager->lastticks + (Uint32) ((float) manager->framecount * manager->rateticks);
|
|
|
|
if (current_ticks <= target_ticks) {
|
|
the_delay = target_ticks - current_ticks;
|
|
SDL_Delay(the_delay);
|
|
} else {
|
|
manager->framecount = 0;
|
|
manager->lastticks = SDL_GetTicks();
|
|
}
|
|
}
|