add render callback example, put the core basic window back how it was

examples/Makefile

@@ -562,6 +562,7 @@ CORE = \
     core/core_monitor_detector \
     core/core_random_sequence \
     core/core_random_values \
+    core/core_render_callback \
     core/core_render_texture \
     core/core_scissor_test \
     core/core_screen_recording \

examples/Makefile.Web

@@ -535,6 +535,7 @@ CORE = \
     core/core_random_sequence \
     core/core_random_values \
     core/core_render_texture \
+    core/core_render_callback \
     core/core_scissor_test \
     core/core_screen_recording \
     core/core_smooth_pixelperfect \

examples/core/core_basic_window.c

@@ -27,22 +27,6 @@
 ********************************************************************************************/
 
 #include "raylib.h"
-#include <math.h>
-
-bool RunFrame(void)
-{
-    if (WindowShouldClose())
-        return false;
-
-    ClearBackground(BLACK);
-
-    float offset = cosf(GetTime() * 2.0f) *60.0f;
-    DrawTextEx(GetFontDefault(), "Congrats! You created your first window!", (Vector2) { 190, 200 + offset}, 20, 2, LIGHTGRAY);
-
-    DrawFPS(10, 10);
-    DrawText(TextFormat("FrameTime %0.3f", GetFrameTime()), 10, 30, 20, GRAY);
-    return true;
-}
 
 //------------------------------------------------------------------------------------
 // Program main entry point
@@ -54,14 +38,30 @@ int main(void)
     const int screenWidth = 800;
     const int screenHeight = 450;
 
-    SetConfigFlags(FLAG_WINDOW_RESIZABLE);
     InitWindow(screenWidth, screenHeight, "raylib [core] example - basic window");
 
     SetTargetFPS(60);               // Set our game to run at 60 frames-per-second
     //--------------------------------------------------------------------------------------
 
     // Main game loop
-    RunGameLoop(RunFrame);
+    while (!WindowShouldClose())    // Detect window close button or ESC key
+    {
+        // Update
+        //----------------------------------------------------------------------------------
+        // TODO: Update your variables here
+        //----------------------------------------------------------------------------------
+
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+
+            ClearBackground(RAYWHITE);
+
+            DrawText("Congrats! You created your first window!", 190, 200, 20, LIGHTGRAY);
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
 
     // De-Initialization
     //--------------------------------------------------------------------------------------

examples/core/core_render_callback.c

@@ -0,0 +1,72 @@
+/*******************************************************************************************
+*
+*   raylib [core] example - basic render callback
+*
+*   Example complexity rating: [★★☆☆] 2/4
+*
+*   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
+*
+*   To test the examples on Web, press F6 and execute 'raylib_compile_execute_web' script
+*   Web version of the program is generated 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. :)
+*
+*   Example originally created with raylib 6.1, last time updated with raylib 6.1
+*
+*   Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
+*   BSD-like license that allows static linking with closed source software
+*
+*   Copyright (c) 2013-2026 Ramon Santamaria (@raysan5)
+*
+********************************************************************************************/
+
+#include "raylib.h"
+#include <math.h>
+
+// called by raylib once per frame. On web will use emcscrpten callback
+bool RunFrame(void)
+{
+    // return false if you want to exit
+    if (WindowShouldClose())
+        return false;
+
+    ClearBackground(BLACK);
+
+    // animate the text so you can see it move while the window is resized or dragged
+    float offset = cosf((float)GetTime() * 2.0f) *60.0f;
+    DrawTextEx(GetFontDefault(), "Hello Render Callback, drag the window!", (Vector2) { 190, 200 + offset}, 20, 2, LIGHTGRAY);
+    return true;
+}
+
+//------------------------------------------------------------------------------------
+// Program main entry point
+//------------------------------------------------------------------------------------
+int main(void)
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    const int screenWidth = 800;
+    const int screenHeight = 450;
+
+    SetConfigFlags(FLAG_WINDOW_RESIZABLE | FLAG_WINDOW_HIGHDPI | FLAG_VSYNC_HINT);
+    InitWindow(screenWidth, screenHeight, "raylib [core] example - basic render callback");
+
+    SetTargetFPS(60);               // Set our game to run at 60 frames-per-second
+    //--------------------------------------------------------------------------------------
+
+    // Run a game loop using the provided callback function, which will be called every frame
+    RunGameLoop(RunFrame);
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    CloseWindow();        // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+}