Double Buffering

Using SDL_FillRect() for Effective Buffer Management

How should I use SDL_FillRect() in the context of double buffering?

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SDL_FillRect() is used to draw a rectangle on the current back buffer in SDL. Here’s how to use it effectively in double buffering context:

#include <SDL.h>

int main(int argc, char** argv) {
  SDL_Init(SDL_INIT_VIDEO);
  SDL_Window* window = SDL_CreateWindow(
    "Fill Rect Example",
    SDL_WINDOWPOS_UNDEFINED,
    SDL_WINDOWPOS_UNDEFINED, 640, 480, 0);

  SDL_Surface* surface = SDL_GetWindowSurface(
    window);

  while (true) {
    // Define rectangle size and position
    SDL_Rect rect = {10, 10, 200, 200};

    // Fill rectangle with red
    SDL_FillRect(surface, &rect, SDL_MapRGB(
      surface->format, 0xFF, 0x00, 0x00));

    // Update the front buffer with the back
    // buffer content
    SDL_UpdateWindowSurface(window);
  }

  SDL_DestroyWindow(window);
  SDL_Quit();
  return 0;
}
This Question is from the Lesson:

Double Buffering

Learn the essentials of double buffering in C++ with practical examples and SDL2 specifics to improve your graphics projects

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

This Question is from the Lesson:

Double Buffering

Learn the essentials of double buffering in C++ with practical examples and SDL2 specifics to improve your graphics projects

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