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authorAndrei Karas <akaras@inbox.ru>2013-11-05 20:56:20 +0300
committerAndrei Karas <akaras@inbox.ru>2013-11-05 20:56:20 +0300
commit102a7d4fe6e8874ad7dcdfe085a22b51de22999b (patch)
tree3dfdb542035ba1f6c871b6901461c81f11b1c6db /src/sdl2gfx/SDL_framerate.c
parent0ca79840f3497375591a43b38d520ada03dfb2dd (diff)
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add configure option --without-internalsdlgfx for not use emdedded sdl2gfx.
Diffstat (limited to 'src/sdl2gfx/SDL_framerate.c')
-rw-r--r--src/sdl2gfx/SDL_framerate.c189
1 files changed, 0 insertions, 189 deletions
diff --git a/src/sdl2gfx/SDL_framerate.c b/src/sdl2gfx/SDL_framerate.c
deleted file mode 100644
index bb1c35fcb..000000000
--- a/src/sdl2gfx/SDL_framerate.c
+++ /dev/null
@@ -1,189 +0,0 @@
-/*
-
-SDL_framerate.c: framerate manager
-
-Copyright (C) 2001-2012 Andreas Schiffler
-
-This software is provided 'as-is', without any express or implied
-warranty. In no event will the authors be held liable for any damages
-arising from the use of this software.
-
-Permission is granted to anyone to use this software for any purpose,
-including commercial applications, and to alter it and redistribute it
-freely, subject to the following restrictions:
-
-1. The origin of this software must not be misrepresented; you must not
-claim that you wrote the original software. If you use this software
-in a product, an acknowledgment in the product documentation would be
-appreciated but is not required.
-
-2. Altered source versions must be plainly marked as such, and must not be
-misrepresented as being the original software.
-
-3. This notice may not be removed or altered from any source
-distribution.
-
-Andreas Schiffler -- aschiffler at ferzkopp dot net
-
-Changed for ManaPlus (C) 2013 ManaPlus developers
-*/
-
-#include "SDL_framerate.h"
-
-/*!
-\brief Internal wrapper to SDL_GetTicks that ensures a non-zero return value.
-
-\return The tick count.
-*/
-uint32_t _getTicks()
-{
- 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;
-}
-
-/*!
-\brief Initialize the framerate manager.
-
-Initialize the framerate manager, set default framerate of 30Hz and
-reset delay interpolation.
-
-\param manager Pointer to the framerate 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;
-
-}
-
-/*!
-\brief 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.
-
-\param manager Pointer to the framerate manager.
-\param rate The new framerate in Hz (frames per second).
-
-\return 0 for sucess and -1 for error.
-*/
-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;
- }
-}
-
-/*!
-\brief Return the current target framerate in Hz
-
-Get the currently set framerate of the manager.
-
-\param manager Pointer to the framerate manager.
-
-\return Current framerate in Hz or -1 for error.
-*/
-int SDL_getFramerate(FPSmanager *const manager)
-{
- if (!manager)
- return -1;
- else
- return (int)manager->rate;
-}
-
-/*!
-\brief Return the current framecount.
-
-Get the current framecount from the framerate manager.
-A frame is counted each time SDL_framerateDelay is called.
-
-\param manager Pointer to the framerate manager.
-
-\return Current frame count or -1 for error.
-*/
-int SDL_getFramecount(FPSmanager *const manager)
-{
- if (!manager)
- return -1;
- else
- return (int)manager->framecount;
-}
-
-/*!
-\brief 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.
-
-\param manager Pointer to the framerate manager.
-
-\return The time that passed since the last call to the function in ms. May return 0.
-*/
-uint32_t SDL_framerateDelay(FPSmanager *const manager)
-{
- 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;
-}