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author | Andrei Karas <akaras@inbox.ru> | 2013-08-27 20:22:09 +0300 |
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committer | Andrei Karas <akaras@inbox.ru> | 2013-08-27 21:52:59 +0300 |
commit | 53ae7cee19c269a6ebf53e468825305d448ff006 (patch) | |
tree | fb43a66adaacc3bb2e42a8d346b5d267f2b807c8 /src/sdl2gfx | |
parent | eb9841897bbe93da6aa4ca2537a3e22b3a868d98 (diff) | |
download | plus-53ae7cee19c269a6ebf53e468825305d448ff006.tar.gz plus-53ae7cee19c269a6ebf53e468825305d448ff006.tar.bz2 plus-53ae7cee19c269a6ebf53e468825305d448ff006.tar.xz plus-53ae7cee19c269a6ebf53e468825305d448ff006.zip |
fix code style.
Diffstat (limited to 'src/sdl2gfx')
-rw-r--r-- | src/sdl2gfx/SDL_framerate.c | 172 | ||||
-rw-r--r-- | src/sdl2gfx/SDL_framerate.h | 81 |
2 files changed, 128 insertions, 125 deletions
diff --git a/src/sdl2gfx/SDL_framerate.c b/src/sdl2gfx/SDL_framerate.c index 6735f6355..bb1c35fcb 100644 --- a/src/sdl2gfx/SDL_framerate.c +++ b/src/sdl2gfx/SDL_framerate.c @@ -25,6 +25,7 @@ distribution. Andreas Schiffler -- aschiffler at ferzkopp dot net +Changed for ManaPlus (C) 2013 ManaPlus developers */ #include "SDL_framerate.h" @@ -34,21 +35,20 @@ Andreas Schiffler -- aschiffler at ferzkopp dot net \return The tick count. */ -Uint32 _getTicks() +uint32_t _getTicks() { - Uint32 ticks = SDL_GetTicks(); - - /* - * Since baseticks!=0 is used to track initialization - * we need to ensure that the tick count is always >0 - * since SDL_GetTicks may not have incremented yet and - * return 0 depending on the timing of the calls. - */ - if (ticks == 0) { - return 1; - } else { - return ticks; - } + const uint32_t ticks = SDL_GetTicks(); + + /* + * Since baseticks!=0 is used to track initialization + * we need to ensure that the tick count is always >0 + * since SDL_GetTicks may not have incremented yet and + * return 0 depending on the timing of the calls. + */ + if (ticks == 0) + return 1; + else + return ticks; } /*! @@ -59,16 +59,16 @@ reset delay interpolation. \param manager Pointer to the framerate manager. */ -void SDL_initFramerate(FPSmanager * manager) +void SDL_initFramerate(FPSmanager *const manager) { - /* - * Store some sane values - */ - manager->framecount = 0; - manager->rate = FPS_DEFAULT; - manager->rateticks = (1000.0f / (float) FPS_DEFAULT); - manager->baseticks = _getTicks(); - manager->lastticks = manager->baseticks; + /* + * Store some sane values + */ + manager->framecount = 0; + manager->rate = FPS_DEFAULT; + manager->rateticks = (1000.0f / (float) FPS_DEFAULT); + manager->baseticks = _getTicks(); + manager->lastticks = manager->baseticks; } @@ -83,16 +83,19 @@ Rate values must be between FPS_LOWER_LIMIT and FPS_UPPER_LIMIT inclusive to be \return 0 for sucess and -1 for error. */ -int SDL_setFramerate(FPSmanager * manager, Uint32 rate) +int SDL_setFramerate(FPSmanager *const manager, const uint32_t rate) { - if ((rate >= FPS_LOWER_LIMIT) && (rate <= FPS_UPPER_LIMIT)) { - manager->framecount = 0; - manager->rate = rate; - manager->rateticks = (1000.0f / (float) rate); - return (0); - } else { - return (-1); - } + if (rate >= FPS_LOWER_LIMIT && rate <= FPS_UPPER_LIMIT) + { + manager->framecount = 0; + manager->rate = rate; + manager->rateticks = (1000.0f / (float) rate); + return 0; + } + else + { + return -1; + } } /*! @@ -104,13 +107,12 @@ Get the currently set framerate of the manager. \return Current framerate in Hz or -1 for error. */ -int SDL_getFramerate(FPSmanager * manager) +int SDL_getFramerate(FPSmanager *const manager) { - if (manager == NULL) { - return (-1); - } else { - return ((int)manager->rate); - } + if (!manager) + return -1; + else + return (int)manager->rate; } /*! @@ -123,13 +125,12 @@ A frame is counted each time SDL_framerateDelay is called. \return Current frame count or -1 for error. */ -int SDL_getFramecount(FPSmanager * manager) +int SDL_getFramecount(FPSmanager *const manager) { - if (manager == NULL) { - return (-1); - } else { - return ((int)manager->framecount); - } + if (!manager) + return -1; + else + return (int)manager->framecount; } /*! @@ -143,47 +144,46 @@ drawing too slow), the delay is zero and the delay interpolation is reset. \return The time that passed since the last call to the function in ms. May return 0. */ -Uint32 SDL_framerateDelay(FPSmanager * manager) +uint32_t SDL_framerateDelay(FPSmanager *const manager) { - Uint32 current_ticks; - Uint32 target_ticks; - Uint32 the_delay; - Uint32 time_passed = 0; - - /* - * No manager, no delay - */ - if (manager == NULL) { - return 0; - } - - /* - * Initialize uninitialized manager - */ - if (manager->baseticks == 0) { - SDL_initFramerate(manager); - } - - /* - * Next frame - */ - manager->framecount++; - - /* - * Get/calc ticks - */ - current_ticks = _getTicks(); - time_passed = current_ticks - manager->lastticks; - manager->lastticks = current_ticks; - target_ticks = manager->baseticks + (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->baseticks = _getTicks(); - } - - return time_passed; + uint32_t the_delay; + + /* + * No manager, no delay + */ + if (!manager) + return 0; + + /* + * Initialize uninitialized manager + */ + if (manager->baseticks == 0) + SDL_initFramerate(manager); + + /* + * Next frame + */ + manager->framecount ++; + + /* + * Get/calc ticks + */ + const uint32_t current_ticks = _getTicks(); + const uint32_t time_passed = current_ticks - manager->lastticks; + manager->lastticks = current_ticks; + const uint32_t target_ticks = manager->baseticks + (uint32_t)( + (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->baseticks = _getTicks(); + } + + return time_passed; } diff --git a/src/sdl2gfx/SDL_framerate.h b/src/sdl2gfx/SDL_framerate.h index b4e7ab8e8..a2e62e944 100644 --- a/src/sdl2gfx/SDL_framerate.h +++ b/src/sdl2gfx/SDL_framerate.h @@ -35,39 +35,40 @@ Andreas Schiffler -- aschiffler at ferzkopp dot net extern "C" { #endif - /* --- */ + /* --- */ #include "SDL.h" - /* --------- Definitions */ - - /*! - \brief Highest possible rate supported by framerate controller in Hz (1/s). - */ -#define FPS_UPPER_LIMIT 200 - - /*! - \brief Lowest possible rate supported by framerate controller in Hz (1/s). - */ -#define FPS_LOWER_LIMIT 1 - - /*! - \brief Default rate of framerate controller in Hz (1/s). - */ -#define FPS_DEFAULT 30 - - /*! - \brief Structure holding the state and timing information of the framerate controller. - */ - typedef struct { - Uint32 framecount; - float rateticks; - Uint32 baseticks; - Uint32 lastticks; - Uint32 rate; - } FPSmanager; - - /* ---- Function Prototypes */ + /* --------- Definitions */ + + /*! + \brief Highest possible rate supported by framerate controller in Hz (1/s). + */ +#define FPS_UPPER_LIMIT 200 + + /*! + \brief Lowest possible rate supported by framerate controller in Hz (1/s). + */ +#define FPS_LOWER_LIMIT 1 + + /*! + \brief Default rate of framerate controller in Hz (1/s). + */ +#define FPS_DEFAULT 30 + + /*! + \brief Structure holding the state and timing information of the framerate controller. + */ + typedef struct + { + uint32_t framecount; + float rateticks; + uint32_t baseticks; + uint32_t lastticks; + uint32_t rate; + } FPSmanager; + + /* ---- Function Prototypes */ #ifdef _MSC_VER # if defined(DLL_EXPORT) && !defined(LIBSDL2_GFX_DLL_IMPORT) @@ -82,19 +83,21 @@ extern "C" { # define SDL2_FRAMERATE_SCOPE extern #endif - /* Functions return 0 or value for sucess and -1 for error */ + /* Functions return 0 or value for sucess and -1 for error */ - SDL2_FRAMERATE_SCOPE void SDL_initFramerate(FPSmanager * manager); - SDL2_FRAMERATE_SCOPE int SDL_setFramerate(FPSmanager * manager, Uint32 rate); - SDL2_FRAMERATE_SCOPE int SDL_getFramerate(FPSmanager * manager); - SDL2_FRAMERATE_SCOPE int SDL_getFramecount(FPSmanager * manager); - SDL2_FRAMERATE_SCOPE Uint32 SDL_framerateDelay(FPSmanager * manager); + SDL2_FRAMERATE_SCOPE void SDL_initFramerate(FPSmanager *const manager); + SDL2_FRAMERATE_SCOPE int SDL_setFramerate(FPSmanager *const manager, + const uint32_t rate); + SDL2_FRAMERATE_SCOPE int SDL_getFramerate(FPSmanager *const manager); + SDL2_FRAMERATE_SCOPE int SDL_getFramecount(FPSmanager *const manager); + SDL2_FRAMERATE_SCOPE uint32_t SDL_framerateDelay(FPSmanager *const + manager); - /* --- */ + /* --- */ - /* Ends C function definitions when using C++ */ + /* Ends C function definitions when using C++ */ #ifdef __cplusplus } #endif -#endif /* _SDL2_framerate_h */ +#endif /* _SDL2_framerate_h */ |