From 3989be8e4cc2b140dc5b72badc452cbb3440bea6 Mon Sep 17 00:00:00 2001
From: Floogle <18466542+skyfloogle@users.noreply.github.com>
Date: Sat, 14 Dec 2024 13:16:19 +0100
Subject: [PATCH] more aggressive frameskip

---
 source/3ds/main.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/source/3ds/main.c b/source/3ds/main.c
index a249b86..944a1f0 100644
--- a/source/3ds/main.c
+++ b/source/3ds/main.c
@@ -36,6 +36,7 @@ int main(void) {
     int frame = 0;
     int err = 0;
     bool on_time = false;
+    bool just_lagged = false;
     PrintConsole main_console;
 #if DEBUGLEVEL == 0
     PrintConsole debug_console;
@@ -138,7 +139,8 @@ int main(void) {
             if (C3D_FrameBegin(C3D_FRAME_NONBLOCK)) {
                 guiUpdate(osTickCounterRead(&frameTickCounter), osTickCounterRead(&drcTickCounter));
 
-                if (tVIPREG.DPCTRL & 0x0002) {
+                // if we just had a lagframe on which drawing happened, don't draw
+                if ((tVIPREG.DPCTRL & 0x0002) && (!on_time || !just_lagged)) {
                     video_render(alt_buf, on_time);
                     on_time = true;
                 } else if (on_time) {
@@ -146,8 +148,6 @@ int main(void) {
                     on_time = false;
                 }
                 C3D_FrameEnd(0);
-            } else {
-                on_time = false;
             }
             if (tVIPREG.XPCTRL & 0x0002) {
                 if (tDSPCACHE.DDSPDataState[alt_buf] != GPU_CLEAR) {
@@ -195,7 +195,8 @@ int main(void) {
         osTickCounterUpdate(&frameTickCounter);
 
         if (!tVBOpt.FASTFORWARD) {
-            if (lag_frames <= 0) {
+            just_lagged = lag_frames > 0;
+            if (!just_lagged) {
                 svcWaitSynchronization(frame_event, 20000000);
                 lag_frames = 1;
             }