From 931ec082b8afc19b7605f43b156a6a5b25a38f25 Mon Sep 17 00:00:00 2001
From: Henri Vasserman <henv@hot.ee>
Date: Thu, 9 Jan 2025 17:43:06 +0200
Subject: [PATCH] enable vsync for smooth scrolling

---
 xormod.c | 15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

diff --git a/xormod.c b/xormod.c
index f1a631f..e13d7bb 100644
--- a/xormod.c
+++ b/xormod.c
@@ -5,6 +5,7 @@
 #include "platform.h"
 #include "types.h"
 
+#include <SDL3/SDL_render.h>
 #include <stdio.h>
 #include <inttypes.h>
 #include <SDL3/SDL.h>
@@ -28,6 +29,8 @@ int main() {
 
     SDL_Renderer *rend = SDL_CreateRenderer(window, NULL);
 
+    SDL_SetRenderVSync(rend, 1);
+    
     Field f;
     Field_init(&f, w, h);
 
@@ -50,16 +53,16 @@ int main() {
 
         const bool *keys = SDL_GetKeyboardState(NULL);
         if (keys[SDL_SCANCODE_LEFT] || keys[SDL_SCANCODE_A]) {
-            f.offset.x -= 16;
+            f.offset.x -= delta;
         }
         if (keys[SDL_SCANCODE_RIGHT] || keys[SDL_SCANCODE_D]) {
-            f.offset.x += 16;
+            f.offset.x += delta;
         }
         if (keys[SDL_SCANCODE_UP] || keys[SDL_SCANCODE_W]) {
-            f.offset.y -= 16;
+            f.offset.y -= delta;
         }
         if (keys[SDL_SCANCODE_DOWN] || keys[SDL_SCANCODE_S]) {
-            f.offset.y += 16;
+            f.offset.y += delta;
         }
 
         SDL_Event event;
@@ -128,10 +131,6 @@ int main() {
         }
 
         SDL_RenderPresent(rend);
-
-        if (delta < 16) {
-            SDL_Delay(16 - delta);
-        }
     }
 
     SDL_DestroyRenderer(rend);