sdl_framerate.h

来自「sdl的gfx开发包」· C头文件 代码 · 共 66 行

/*

 SDL_framerate: framerate manager
 
 LGPL (c) A. Schiffler
 
 */

#ifndef _SDL_framerate_h
#define _SDL_framerate_h

/* Set up for C function definitions, even when using C++ */
#ifdef __cplusplus
extern "C" {
#endif

/* --- */

#include <SDL/SDL.h>

/* --------- Definitions */

/* Some rates in Hz */

#define FPS_UPPER_LIMIT		200
#define FPS_LOWER_LIMIT		1
#define FPS_DEFAULT		30

/* --------- Structure variables */

    typedef struct {
	Uint32 framecount;
	float rateticks;
	Uint32 lastticks;
	Uint32 rate;
    } FPSmanager;

/* --------- Function prototypes */

#ifdef WIN32
#ifdef BUILD_DLL
#define DLLINTERFACE __declspec(dllexport)
#else
#define DLLINTERFACE __declspec(dllimport)
#endif
#else
#define DLLINTERFACE
#endif

/* Functions return 0 or value for sucess and -1 for error */

    DLLINTERFACE void SDL_initFramerate(FPSmanager * manager);
    DLLINTERFACE int SDL_setFramerate(FPSmanager * manager, int rate);
    DLLINTERFACE int SDL_getFramerate(FPSmanager * manager);
    DLLINTERFACE void SDL_framerateDelay(FPSmanager * manager);

/* --- */

/* Ends C function definitions when using C++ */
#ifdef __cplusplus
};
#endif

#endif				/* _SDL_framerate_h */