From 84505f93fc51347e705762e6180f0a868fe4f320 Mon Sep 17 00:00:00 2001
From: keks137 <keks137@proton.me>
Date: Sun, 10 May 2026 14:19:25 +0200
Subject: [PATCH] port glfw's behaviour on size 0 window creation to rgfw

---
 src/platforms/rcore_desktop_rgfw.c | 39 +++++++++++++++++++++++++++++-
 1 file changed, 38 insertions(+), 1 deletion(-)
 mode change 100755 => 100644 src/platforms/rcore_desktop_rgfw.c

diff --git a/src/platforms/rcore_desktop_rgfw.c b/src/platforms/rcore_desktop_rgfw.c
old mode 100755
new mode 100644
index a71dbb15e..081d4248a
--- a/src/platforms/rcore_desktop_rgfw.c
+++ b/src/platforms/rcore_desktop_rgfw.c
@@ -1674,9 +1674,13 @@ void PollInputEvents(void)
 // Initialize platform: graphics, inputs and more
 int InitPlatform(void)
 {
+    int result = RGFW_init();
+    if (result != 0) { TRACELOG(LOG_WARNING, "RGFW: Failed to initialize RGFW"); return -1; }
     // Initialize RGFW internal global state, only required systems
     unsigned int flags = RGFW_windowCenter | RGFW_windowAllowDND;
 
+    if ((CORE.Window.screen.width == 0) || (CORE.Window.screen.height == 0)) FLAG_SET(CORE.Window.flags, FLAG_FULLSCREEN_MODE);
+
     // Check window creation flags
     if (FLAG_IS_SET(CORE.Window.flags, FLAG_FULLSCREEN_MODE))
     {
@@ -1691,7 +1695,40 @@ int InitPlatform(void)
     if (FLAG_IS_SET(CORE.Window.flags, FLAG_WINDOW_UNDECORATED)) FLAG_SET(flags, RGFW_windowNoBorder);
     if (!FLAG_IS_SET(CORE.Window.flags, FLAG_WINDOW_RESIZABLE)) FLAG_SET(flags, RGFW_windowNoResize);
     if (FLAG_IS_SET(CORE.Window.flags, FLAG_WINDOW_TRANSPARENT)) FLAG_SET(flags, RGFW_windowTransparent);
-    if (FLAG_IS_SET(CORE.Window.flags, FLAG_FULLSCREEN_MODE)) FLAG_SET(flags, RGFW_windowFullscreen);
+    // Init window in fullscreen mode if requested
+    // NOTE: Keeping original screen size for toggle
+    if (FLAG_IS_SET(CORE.Window.flags, FLAG_FULLSCREEN_MODE)) {
+        FLAG_SET(flags, RGFW_windowFullscreen);
+        // NOTE: Fullscreen applications default to the primary monitor
+        RGFW_monitor *monitor = RGFW_getPrimaryMonitor();
+        if (!monitor)
+        {
+            TRACELOG(LOG_WARNING, "RGFW: Failed to get primary monitor");
+            return -1;
+        }
+        // Default display resolution to that of the current mode
+        CORE.Window.display.width = monitor->mode.w;
+        CORE.Window.display.height = monitor->mode.h;
+
+        // Check if user requested some screen size
+        if ((CORE.Window.screen.width == 0) || (CORE.Window.screen.height == 0))
+        {
+            // Set some default screen size in case user decides to exit fullscreen mode
+            CORE.Window.previousScreen.width = 800;
+            CORE.Window.previousScreen.height = 450;
+            CORE.Window.previousPosition.x = CORE.Window.display.width/2 - 800/2;
+            CORE.Window.previousPosition.y = CORE.Window.display.height/2 - 450/2;
+
+            // Set screen width/height to the display width/height
+            if (CORE.Window.screen.width == 0) CORE.Window.screen.width = CORE.Window.display.width;
+            if (CORE.Window.screen.height == 0) CORE.Window.screen.height = CORE.Window.display.height;
+        }
+        else
+        {
+            CORE.Window.previousScreen = CORE.Window.screen;
+            CORE.Window.screen = CORE.Window.display;
+        }
+    }
     if (FLAG_IS_SET(CORE.Window.flags, FLAG_WINDOW_HIDDEN)) FLAG_SET(flags, RGFW_windowHide);
     if (FLAG_IS_SET(CORE.Window.flags, FLAG_WINDOW_MAXIMIZED)) FLAG_SET(flags, RGFW_windowMaximize);