From 962030e70ad3dfcce5d4642ad65890fde93ad117 Mon Sep 17 00:00:00 2001
From: ubkp <118854183+ubkp@users.noreply.github.com>
Date: Fri, 28 Jul 2023 15:08:41 -0300
Subject: [PATCH] Changes SetWindowMonitor() to no longer force fullscreen
 (#3209)

* Changes SetWindowMonitor() to no longer force fullscreen

* Readds fullscreen support
---
 src/raylib.h |  2 +-
 src/rcore.c  | 32 ++++++++++++++++++++++++++++----
 2 files changed, 29 insertions(+), 5 deletions(-)

diff --git a/src/raylib.h b/src/raylib.h
index 108ab0245e05..b3f17bd53926 100644
--- a/src/raylib.h
+++ b/src/raylib.h
@@ -954,7 +954,7 @@ RLAPI void SetWindowIcon(Image image);                            // Set icon fo
 RLAPI void SetWindowIcons(Image *images, int count);              // Set icon for window (multiple images, RGBA 32bit, only PLATFORM_DESKTOP)
 RLAPI void SetWindowTitle(const char *title);                     // Set title for window (only PLATFORM_DESKTOP)
 RLAPI void SetWindowPosition(int x, int y);                       // Set window position on screen (only PLATFORM_DESKTOP)
-RLAPI void SetWindowMonitor(int monitor);                         // Set monitor for the current window (fullscreen mode)
+RLAPI void SetWindowMonitor(int monitor);                         // Set monitor for the current window
 RLAPI void SetWindowMinSize(int width, int height);               // Set window minimum dimensions (for FLAG_WINDOW_RESIZABLE)
 RLAPI void SetWindowSize(int width, int height);                  // Set window dimensions
 RLAPI void SetWindowOpacity(float opacity);                       // Set window opacity [0.0f..1.0f] (only PLATFORM_DESKTOP)
diff --git a/src/rcore.c b/src/rcore.c
index d6aeaec96f39..66a914ee7dea 100644
--- a/src/rcore.c
+++ b/src/rcore.c
@@ -1661,7 +1661,7 @@ void SetWindowPosition(int x, int y)
 #endif
 }
 
-// Set monitor for the current window (fullscreen mode)
+// Set monitor for the current window
 void SetWindowMonitor(int monitor)
 {
 #if defined(PLATFORM_DESKTOP)
@@ -1670,10 +1670,34 @@ void SetWindowMonitor(int monitor)
 
     if ((monitor >= 0) && (monitor < monitorCount))
     {
-        TRACELOG(LOG_INFO, "GLFW: Selected fullscreen monitor: [%i] %s", monitor, glfwGetMonitorName(monitors[monitor]));
+        if (CORE.Window.fullscreen)
+        {
+            TRACELOG(LOG_INFO, "GLFW: Selected fullscreen monitor: [%i] %s", monitor, glfwGetMonitorName(monitors[monitor]));
 
-        const GLFWvidmode *mode = glfwGetVideoMode(monitors[monitor]);
-        glfwSetWindowMonitor(CORE.Window.handle, monitors[monitor], 0, 0, mode->width, mode->height, mode->refreshRate);
+            const GLFWvidmode *mode = glfwGetVideoMode(monitors[monitor]);
+            glfwSetWindowMonitor(CORE.Window.handle, monitors[monitor], 0, 0, mode->width, mode->height, mode->refreshRate);
+        }
+        else
+        {
+            TRACELOG(LOG_INFO, "GLFW: Selected monitor: [%i] %s", monitor, glfwGetMonitorName(monitors[monitor]));
+
+            const int screenWidth = CORE.Window.screen.width;
+            const int screenHeight = CORE.Window.screen.height;
+            int monitorWorkareaX = 0;
+            int monitorWorkareaY = 0;
+            int monitorWorkareaWidth = 0;
+            int monitorWorkareaHeight = 0;
+            glfwGetMonitorWorkarea(monitors[monitor], &monitorWorkareaX, &monitorWorkareaY, &monitorWorkareaWidth, &monitorWorkareaHeight);
+
+            // If the screen size is larger than the monitor workarea, anchor it on the top left corner, otherwise, center it
+            if ((screenWidth >= monitorWorkareaWidth) || (screenHeight >= monitorWorkareaHeight)) glfwSetWindowPos(CORE.Window.handle, monitorWorkareaX, monitorWorkareaY);
+            else
+            {
+                const int x = monitorWorkareaX + (monitorWorkareaWidth*0.5f) - (screenWidth*0.5f);
+                const int y = monitorWorkareaY + (monitorWorkareaHeight*0.5f) - (screenHeight*0.5f);
+                glfwSetWindowPos(CORE.Window.handle, x, y);
+            }
+        }
     }
     else TRACELOG(LOG_WARNING, "GLFW: Failed to find selected monitor");
 #endif