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use waitable timer also for fps limiter

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This commit is contained in:
FunkyFr3sh 2018-11-29 21:26:43 +01:00
parent 435854456b
commit 97ca023f09
6 changed files with 111 additions and 44 deletions
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52
src/render_d3d9.c
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@ -19,8 +19,6 @@ static IDirect3DTexture9 *PaletteTex[TEXTURE_COUNT];
static IDirect3DPixelShader9 *PixelShader;
static float ScaleW;
static float ScaleH;
static int MaxFPS;
static DWORD FrameLength;
static int BitsPerPixel;
static BOOL CreateResources();
@ -276,16 +274,22 @@ static BOOL UpdateVertices(BOOL inCutscene, BOOL stretch)
static void SetMaxFPS()
{
MaxFPS = ddraw->render.maxfps;
int maxFPS = ddraw->render.maxfps;
ddraw->fpsLimiter.tickLengthNs = 0;
ddraw->fpsLimiter.ticklength = 0;
if (MaxFPS < 0)
MaxFPS = ddraw->mode.dmDisplayFrequency;
if (maxFPS < 0)
maxFPS = ddraw->mode.dmDisplayFrequency;
if (MaxFPS >= 1000 || ddraw->vsync)
MaxFPS = 0;
if (maxFPS > 1000 || ddraw->vsync)
maxFPS = 0;
if (MaxFPS > 0)
FrameLength = 1000.0f / MaxFPS;
if (maxFPS > 0)
{
float len = 1000.0f / maxFPS;
ddraw->fpsLimiter.tickLengthNs = len * 10000;
ddraw->fpsLimiter.ticklength = len + 0.5f;
}
}
DWORD WINAPI render_d3d9_main(void)
@ -312,7 +316,7 @@ DWORD WINAPI render_d3d9_main(void)
static int texIndex = 0, palIndex = 0;
if (MaxFPS > 0)
if (ddraw->fpsLimiter.ticklength > 0)
tickStart = timeGetTime();
EnterCriticalSection(&ddraw->cs);
@ -416,12 +420,32 @@ DWORD WINAPI render_d3d9_main(void)
DrawFrameInfoEnd();
#endif
if (MaxFPS > 0)
if (ddraw->fpsLimiter.ticklength > 0)
{
tickEnd = timeGetTime();
if (ddraw->fpsLimiter.hTimer)
{
FILETIME ft = { 0 };
GetSystemTimeAsFileTime(&ft);
if (tickEnd - tickStart < FrameLength)
Sleep(FrameLength - (tickEnd - tickStart));
if (CompareFileTime((FILETIME *)&ddraw->fpsLimiter.dueTime, &ft) == -1)
{
memcpy(&ddraw->fpsLimiter.dueTime, &ft, sizeof(LARGE_INTEGER));
}
else
{
WaitForSingleObject(ddraw->fpsLimiter.hTimer, ddraw->fpsLimiter.ticklength * 2);
}
ddraw->fpsLimiter.dueTime.QuadPart += ddraw->fpsLimiter.tickLengthNs;
SetWaitableTimer(ddraw->fpsLimiter.hTimer, &ddraw->fpsLimiter.dueTime, 0, NULL, NULL, FALSE);
}
else
{
tickEnd = timeGetTime();
if (tickEnd - tickStart < ddraw->fpsLimiter.ticklength)
Sleep(ddraw->fpsLimiter.ticklength - (tickEnd - tickStart));
}
}
}
return 0;