SDL2_gfx
1.0.1
GraphicsprimitivesandsurfacefunctionsforSDL2
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#include "SDL.h"
Go to the source code of this file.
Data Structures | |
struct | FPSmanager |
Structure holding the state and timing information of the framerate controller. More... | |
Defines | |
#define | FPS_UPPER_LIMIT 200 |
Highest possible rate supported by framerate controller in Hz (1/s). | |
#define | FPS_LOWER_LIMIT 1 |
Lowest possible rate supported by framerate controller in Hz (1/s). | |
#define | FPS_DEFAULT 30 |
Default rate of framerate controller in Hz (1/s). | |
#define | SDL2_FRAMERATE_SCOPE extern |
Functions | |
SDL2_FRAMERATE_SCOPE void | SDL_initFramerate (FPSmanager *manager) |
Initialize the framerate manager. | |
SDL2_FRAMERATE_SCOPE int | SDL_setFramerate (FPSmanager *manager, Uint32 rate) |
Set the framerate in Hz. | |
SDL2_FRAMERATE_SCOPE int | SDL_getFramerate (FPSmanager *manager) |
Return the current target framerate in Hz. | |
SDL2_FRAMERATE_SCOPE int | SDL_getFramecount (FPSmanager *manager) |
Return the current framecount. | |
SDL2_FRAMERATE_SCOPE Uint32 | SDL_framerateDelay (FPSmanager *manager) |
Delay execution to maintain a constant framerate and calculate fps. |
#define FPS_DEFAULT 30 |
Default rate of framerate controller in Hz (1/s).
Definition at line 57 of file SDL2_framerate.h.
#define FPS_LOWER_LIMIT 1 |
Lowest possible rate supported by framerate controller in Hz (1/s).
Definition at line 52 of file SDL2_framerate.h.
#define FPS_UPPER_LIMIT 200 |
Highest possible rate supported by framerate controller in Hz (1/s).
Definition at line 47 of file SDL2_framerate.h.
#define SDL2_FRAMERATE_SCOPE extern |
Definition at line 82 of file SDL2_framerate.h.
SDL2_FRAMERATE_SCOPE Uint32 SDL_framerateDelay | ( | FPSmanager * | manager | ) |
Delay execution to maintain a constant framerate and calculate fps.
Generate a delay to accomodate currently set framerate. Call once in the graphics/rendering loop. If the computer cannot keep up with the rate (i.e. drawing too slow), the delay is zero and the delay interpolation is reset.
manager | Pointer to the framerate manager. |
Definition at line 146 of file SDL2_framerate.c.
SDL2_FRAMERATE_SCOPE int SDL_getFramecount | ( | FPSmanager * | manager | ) |
Return the current framecount.
Get the current framecount from the framerate manager. A frame is counted each time SDL_framerateDelay is called.
manager | Pointer to the framerate manager. |
Definition at line 126 of file SDL2_framerate.c.
SDL2_FRAMERATE_SCOPE int SDL_getFramerate | ( | FPSmanager * | manager | ) |
Return the current target framerate in Hz.
Get the currently set framerate of the manager.
manager | Pointer to the framerate manager. |
Definition at line 107 of file SDL2_framerate.c.
SDL2_FRAMERATE_SCOPE void SDL_initFramerate | ( | FPSmanager * | manager | ) |
Initialize the framerate manager.
Initialize the framerate manager, set default framerate of 30Hz and reset delay interpolation.
manager | Pointer to the framerate manager. |
Definition at line 62 of file SDL2_framerate.c.
SDL2_FRAMERATE_SCOPE int SDL_setFramerate | ( | FPSmanager * | manager, |
Uint32 | rate | ||
) |
Set the framerate in Hz.
Sets a new framerate for the manager and reset delay interpolation. Rate values must be between FPS_LOWER_LIMIT and FPS_UPPER_LIMIT inclusive to be accepted.
manager | Pointer to the framerate manager. |
rate | The new framerate in Hz (frames per second). |
Definition at line 86 of file SDL2_framerate.c.