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

Question

Ryan McCombe · Accepted Answer

`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:

```c++
#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;
}
```

Double Buffering

Using `SDL_FillRect()` for Effective Buffer Management

Double Buffering

Game Development with SDL2

Questions & Answers

Using SDL_FillRect() for Effective Buffer Management

Double Buffering

Questions & Answers

Using `SDL_FillRect()` for Effective Buffer Management