Raylib resize fullscreen example

gistfile1.txt

/*******************************************************************************************
*
*   raylib [core] example - fullscreen toggle
*
*   Welcome to raylib!
*
*   To test examples, just press F6 and execute raylib_compile_execute script
*   Note that compiled executable is placed in the same folder as .c file
*
*   You can find all basic examples on C:\raylib\raylib\examples folder or
*   raylib official webpage: www.raylib.com
*
*   Enjoy using raylib. :)
*
*   This example has been created using raylib 3.5 (www.raylib.com)
*   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
*
*   Copyright (c) 2013-2021 Ramon Santamaria (@raysan5)
*
********************************************************************************************/

#include "raylib.h"

int main(void)
{
    // Initialization
    //--------------------------------------------------------------------------------------
    int screenWidth = 800;
    int screenHeight = 450;

    SetConfigFlags(FLAG_WINDOW_RESIZABLE | FLAG_VSYNC_HINT);
    InitWindow(screenWidth, screenHeight, "raylib [core] example - fullscreen toggle");

    SetTargetFPS(60);               // Set our game to run at 60 frames-per-second

    //--------------------------------------------------------------------------------------
    // Main game loop
    while (!WindowShouldClose())    // Detect window close button or ESC key
    {
        if (IsWindowResized() && !IsWindowFullscreen())
        {
            screenWidth = GetScreenWidth();
            screenHeight = GetScreenHeight();
        }

        // check for alt + enter
 		if (IsKeyPressed(KEY_ENTER) && (IsKeyDown(KEY_LEFT_ALT) || IsKeyDown(KEY_RIGHT_ALT)))
 		{
            // see what display we are on right now
 			int display = GetCurrentMonitor();
 
            
            if (IsWindowFullscreen())
            {
                // if we are full screen, then go back to the windowed size
                SetWindowSize(screenWidth, screenHeight);
            }
            else
            {
                // if we are not full screen, set the window size to match the monitor we are on
                SetWindowSize(GetMonitorWidth(display), GetMonitorHeight(display));
            }
 
            // toggle the state
 			ToggleFullscreen();
 		}

        // Draw
        //----------------------------------------------------------------------------------
        BeginDrawing();

        ClearBackground(RAYWHITE);

        DrawText("Press Alt + Enter to Toggle full screen!", 190, 200, 20, LIGHTGRAY);

        EndDrawing();
        //----------------------------------------------------------------------------------
    }

    // De-Initialization
    //--------------------------------------------------------------------------------------
    CloseWindow();        // Close window and OpenGL context
    //--------------------------------------------------------------------------------------

    return 0;
}