Apple-2-Tools/kegs-android
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Smoother scrolling. Drift away from android vsync by refreshing 1/59.8.

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This commit is contained in:
James Sanford 2012-10-10 23:44:35 -07:00
parent bd3836e409
commit 9cbd698d4d
1 changed files with 21 additions and 0 deletions
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21
jni/sim65816.c
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@ -1910,7 +1910,13 @@ take_irq(int is_it_brk)
}
double g_dtime_last_vbl = 0.0;
#ifdef __ANDROID__
// Fudge emulator screen updates a bit so that we
// continuously drift away from the android vsync.
double g_dtime_expected = (1.0/59.8);
#else
double g_dtime_expected = (1.0/60.0);
#endif
int g_scan_int_events = 0;
@ -2195,7 +2201,11 @@ update_60hz(double dcycs, double dtime_now)
dadjcycs_this_vbl = g_dadjcycs - g_last_vbl_dadjcycs;
g_last_vbl_dadjcycs = g_dadjcycs;
#ifdef __ANDROID__
g_dtime_expected += (1.0/59.8);
#else
g_dtime_expected += (1.0/60.0);
#endif
eff_pmhz = ((dadjcycs_this_vbl) / (dtime_this_vbl)) /
DCYCS_1_MHZ;
@ -2205,7 +2215,11 @@ update_60hz(double dcycs, double dtime_now)
dtime_till_expected = g_dtime_expected - dtime_now;
#ifdef __ANDROID__
dratio = 59.8 * dtime_till_expected;
#else
dratio = 60.0 * dtime_till_expected;
#endif
predicted_pmhz = eff_pmhz * dratio;
@ -2250,10 +2264,17 @@ update_60hz(double dcycs, double dtime_now)
g_dtime_expected += dtime_diff;
}
#ifdef __ANDROID__
if(dtime_till_expected > (2/59.8)) {
/* we're running fast, usleep */
micro_sleep(dtime_till_expected - (1/59.8));
}
#else
if(dtime_till_expected > (3/60.0)) {
/* we're running fast, usleep */
micro_sleep(dtime_till_expected - (1/60.0));
}
#endif
g_dtime_this_vbl_array[prev_vbl_index] = dtime_this_vbl;
g_dtime_exp_array[prev_vbl_index] = g_dtime_expected;