Why use a borderless window?

Borderless windows are common in applications where visual aesthetics and seamless integration with the screen are a priority. Here are some typical use cases:

• Fullscreen Applications: Many games and media players use borderless windows to create a pseudo-fullscreen effect. Unlike true fullscreen, borderless windows allow for quick tabbing between applications without the delay of resolution changes.
• Custom Window Designs: Applications with custom-drawn user interfaces often use borderless windows to remove native window decorations. This is common in creative software like video editors or music players, where the application provides its own styled controls.
• Kiosk or Presentation Mode: In kiosk systems or applications intended for public display, borderless windows can make the application appear as though it’s part of the device rather than a standalone program.
• Immersion: Removing window decorations eliminates distractions, which is useful for virtual reality systems, games, or creative workspaces.

Here’s an example of creating a borderless window in SDL:

1#include <SDL.h>
2
3int main() {
4  SDL_Init(SDL_INIT_VIDEO);
5
6  SDL_Window* Window{SDL_CreateWindow(
7    "Borderless Window",
8    SDL_WINDOWPOS_CENTERED,
9    SDL_WINDOWPOS_CENTERED,
10    800, 600,
11    SDL_WINDOW_BORDERLESS 
12  )};
13
14  // Display window for 3 seconds
15  SDL_Delay(3000);
16
17  SDL_DestroyWindow(Window);
18  SDL_Quit();
19}

This approach focuses on clean visuals and control over the user experience.