Creating the Main Loop with SDL2

How to Improve Frame Rate in an SDL2 Application

What are the best practices for improving the frame rate in SDL2 applications?

Abstract art representing computer programming

Improving frame rate in SDL2 applications involves optimizing your game loop and handling resource-intensive tasks properly. Here are a few tips:

  • Limit Frame Rate: Implement frame limiting to avoid overloading the CPU and GPU. You can do this by calculating the time it takes to complete each frame and delaying the next frame start using SDL_Delay() to maintain a consistent frame rate.
  • Optimize Rendering: Only redraw parts of the screen that have changed. Use SDL_RenderPresent() on specific rectangles rather than the entire screen.
  • Use Hardware Acceleration: Make sure to use hardware-accelerated rendering options in SDL, like using SDL_RENDERER_ACCELERATED when creating the renderer.
#include <SDL.h>

int main(int argc, char** argv) {
  SDL_Init(SDL_INIT_VIDEO);
  SDL_Window* window = SDL_CreateWindow(
    "Frame Rate Example", 100, 100, 640, 480, 0);

  SDL_Renderer* renderer = SDL_CreateRenderer(
    window, -1, SDL_RENDERER_ACCELERATED);

  bool running = true;
  SDL_Event event;
  const int targetFrameRate = 60;

  // milliseconds per frame
  const int frameDelay = 1000 / targetFrameRate;

  while (running) {
    auto frameStart = SDL_GetTicks();

    while (SDL_PollEvent(&event)) {
      if (event.type == SDL_QUIT) running = false;
    }

    SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
    SDL_RenderClear(renderer);
    // Rendering code here
    SDL_RenderPresent(renderer);

    auto frameTime = SDL_GetTicks() - frameStart;
    if (frameDelay > frameTime) {
      SDL_Delay(frameDelay - frameTime);
    }
  }

  SDL_DestroyRenderer(renderer);
  SDL_DestroyWindow(window);
  SDL_Quit();
  return 0;
}

Answers to questions are automatically generated and may not have been reviewed.

sdl2-promo.jpg
Part of the course:

Game Dev with SDL2

Learn C++ and SDL development by creating hands on, practical projects inspired by classic retro games

Free, unlimited access

This course includes:

  • 27 Lessons
  • 100+ Code Samples
  • 91% Positive Reviews
  • Regularly Updated
  • Help and FAQ
Free, Unlimited Access

Professional C++

Comprehensive course covering advanced concepts, and how to use them on large-scale projects.

Screenshot from Warhammer: Total War
Screenshot from Tomb Raider
Screenshot from Jedi: Fallen Order
Contact|Privacy Policy|Terms of Use
Copyright © 2024 - All Rights Reserved