1.1 --- a/src/context.c Thu Mar 28 23:30:21 2024 +0100
1.2 +++ b/src/context.c Fri Mar 29 00:03:25 2024 +0100
1.3 @@ -33,8 +33,16 @@
1.4 #include <SDL2/SDL.h>
1.5 #include <SDL2/SDL_ttf.h>
1.6
1.7 +#include <time.h>
1.8 +
1.9 AscContext asc_context;
1.10
1.11 +static uint64_t asc_nanos(void) {
1.12 + struct timespec ts;
1.13 + clock_gettime(CLOCK_MONOTONIC, &ts);
1.14 + return 1000000000ull*(uint64_t)ts.tv_sec + (uint64_t)ts.tv_nsec;
1.15 +}
1.16 +
1.17 void asc_context_initialize(void) {
1.18 if (asc_test_flag(asc_context.flags, ASC_FLAG_INITILIZED))
1.19 return;
1.20 @@ -58,6 +66,7 @@
1.21 }
1.22 }
1.23 SDL_ClearError();
1.24 + asc_context.total_nanos = asc_nanos();
1.25 asc_set_flag(&asc_context.flags, ASC_FLAG_INITILIZED);
1.26 asc_dprintf("Ascension context initialized.");
1.27 }
1.28 @@ -128,11 +137,13 @@
1.29 }
1.30
1.31 // compute frame time
1.32 - static Uint32 ticks;
1.33 - Uint32 ticks_elapsed = SDL_GetTicks() - ticks;
1.34 - ticks = SDL_GetTicks();
1.35 - asc_context.elapsed_millis = ticks_elapsed;
1.36 - asc_context.elapsed = (float) ticks_elapsed / 1000.0f;
1.37 + uint64_t frame_nanos, ns;
1.38 + do {
1.39 + ns = asc_nanos();
1.40 + frame_nanos = ns - asc_context.total_nanos;
1.41 + } while (frame_nanos == 0);
1.42 + asc_context.frame_nanos = frame_nanos;
1.43 + asc_context.total_nanos = ns;
1.44
1.45 return !asc_test_flag(asc_context.flags, ASC_FLAG_QUIT);
1.46 }
