lucent/cocco-ddraw
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improve fps limiter for vsync and maxfps=-1

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This commit is contained in:
FunkyFr3sh 2021-02-02 18:15:25 +01:00
parent d2903413a0
commit a6f85fbd73
11 changed files with 223 additions and 217 deletions
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55
src/render_gdi.c
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@ -1,5 +1,6 @@
#include <windows.h>
#include <stdio.h>
#include "fps_limiter.h"
#include "dd.h"
#include "ddsurface.h"
#include "opengl_utils.h"
@ -30,26 +31,7 @@ DWORD WINAPI gdi_render_main(void)
Sleep(500);
DWORD tick_start = 0;
DWORD tick_end = 0;
int max_fps = g_ddraw->render.maxfps;
g_ddraw->fps_limiter.tick_length_ns = 0;
g_ddraw->fps_limiter.tick_length = 0;
if (max_fps < 0)
max_fps = g_ddraw->mode.dmDisplayFrequency;
if (max_fps > 1000)
max_fps = 0;
if (max_fps > 0)
{
float len = 1000.0f / max_fps;
g_ddraw->fps_limiter.tick_length_ns = len * 10000;
g_ddraw->fps_limiter.tick_length = len + (g_ddraw->accurate_timers ? 0.5f : 0.0f);
}
fpsl_init();
DWORD timeout = g_ddraw->render.minfps > 0 ? g_ddraw->render.minfps_tick_len : INFINITE;
@ -60,8 +42,7 @@ DWORD WINAPI gdi_render_main(void)
dbg_draw_frame_info_start();
#endif
if (g_ddraw->fps_limiter.tick_length > 0)
tick_start = timeGetTime();
fpsl_frame_start();
EnterCriticalSection(&g_ddraw->cs);
@ -155,35 +136,7 @@ DWORD WINAPI gdi_render_main(void)
dbg_draw_frame_info_end();
#endif
if (g_ddraw->fps_limiter.tick_length > 0)
{
if (g_ddraw->fps_limiter.htimer)
{
FILETIME ft = { 0 };
GetSystemTimeAsFileTime(&ft);
if (CompareFileTime((FILETIME*)&g_ddraw->fps_limiter.due_time, &ft) == -1)
{
memcpy(&g_ddraw->fps_limiter.due_time, &ft, sizeof(LARGE_INTEGER));
}
else
{
WaitForSingleObject(g_ddraw->fps_limiter.htimer, g_ddraw->fps_limiter.tick_length * 2);
}
g_ddraw->fps_limiter.due_time.QuadPart += g_ddraw->fps_limiter.tick_length_ns;
SetWaitableTimer(g_ddraw->fps_limiter.htimer, &g_ddraw->fps_limiter.due_time, 0, NULL, NULL, FALSE);
}
else
{
tick_end = timeGetTime();
if (tick_end - tick_start < g_ddraw->fps_limiter.tick_length)
{
Sleep(g_ddraw->fps_limiter.tick_length - (tick_end - tick_start));
}
}
}
fpsl_frame_end();
}
return TRUE;