Building SDL2 from a Subdirectory (CMake)

Enabling VSync with SDL2

How can I enable vertical synchronization (VSync) in my SDL2 application to prevent screen tearing?

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To enable VSync in SDL2, you need to set the SDL_RENDERER_PRESENTVSYNC flag when creating your renderer. Here's an example:

#include <SDL.h>

int main(int argc, char** argv) {
  SDL_Window* window{SDL_CreateWindow(
    "VSync Example",
    800, 600, SDL_WINDOW_SHOWN

  SDL_Renderer* renderer{SDL_CreateRenderer(
    window, -1,

  // Game loop
  // ...


  return 0;

The SDL_RENDERER_PRESENTVSYNC flag tells SDL to synchronize screen updates with the refresh rate of the monitor. This eliminates screen tearing by ensuring that frames are only updated during the vertical blanking interval.

Keep in mind that enabling VSync will limit your application's frame rate to the refresh rate of the monitor (typically 60 FPS). If your game runs faster than this, you may want to consider using a frame limiter to prevent excessive CPU usage.

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