From: kub <derkub@gmail.com>
Date: Wed, 28 Sep 2022 18:51:19 +0000 (+0000)
Subject: platform, fix emu loop timing for vsync enabled
X-Git-Tag: v2.00~293
X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=12ffc469333c8defc7efb503f23a36b5c9718c53;p=picodrive.git

platform, fix emu loop timing for vsync enabled
---

diff --git a/platform/common/emu.c b/platform/common/emu.c
index f371f5bc..f44aa5d3 100644
--- a/platform/common/emu.c
+++ b/platform/common/emu.c
@@ -1381,7 +1381,7 @@ static void emu_loop_prep(void)
 }
 
 /* our tick here is 1 us right now */
-#define ms_to_ticks(x) (unsigned int)(x * 1000)
+#define ms_to_ticks(x) (int)(x * 1000)
 #define get_ticks() plat_get_ticks_us()
 #define vsync_delay_x3	3*ms_to_ticks(1)
 
@@ -1542,7 +1542,7 @@ void emu_loop(void)
 				// we are too fast
 				plat_video_wait_vsync();
 				timestamp = get_ticks();
-				diff = timestamp * 3 - timestamp_aim_x3;
+				diff = timestamp_aim_x3 - timestamp * 3;
 			}
 			if (diff > target_frametime_x3 + vsync_delay_x3) {
 				// still too fast