From 4be2543f1e0e92d87fd83b9b8ddb3b6f0e651367 Mon Sep 17 00:00:00 2001
From: jgcodes2020 <jackyguo18@hotmail.com>
Date: Sun, 30 Jul 2023 21:47:07 -0400
Subject: [PATCH] begin work on window attachment

---
 src/internal.h |  2 ++
 src/window.c   | 44 ++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 46 insertions(+)

diff --git a/src/internal.h b/src/internal.h
index fe0369aa..2af37d86 100644
--- a/src/internal.h
+++ b/src/internal.h
@@ -532,6 +532,7 @@ struct _GLFWwindow
     GLFWbool            focusOnShow;
     GLFWbool            mousePassthrough;
     GLFWbool            shouldClose;
+    GLFWbool            external;
     void*               userPointer;
     GLFWbool            doublebuffer;
     GLFWvidmode         videoMode;
@@ -706,6 +707,7 @@ struct _GLFWplatform
     void (*setGammaRamp)(_GLFWmonitor*,const GLFWgammaramp*);
     // window
     GLFWbool (*createWindow)(_GLFWwindow*,const _GLFWwndconfig*,const _GLFWctxconfig*,const _GLFWfbconfig*);
+    GLFWbool (*attachWindow)(_GLFWwindow*,const _GLFWwndconfig*,const _GLFWctxconfig*,const _GLFWfbconfig*);
     void (*destroyWindow)(_GLFWwindow*);
     void (*setWindowTitle)(_GLFWwindow*,const char*);
     void (*setWindowIcon)(_GLFWwindow*,int,const GLFWimage*);
diff --git a/src/window.c b/src/window.c
index 1c8519ff..09a80d00 100644
--- a/src/window.c
+++ b/src/window.c
@@ -254,6 +254,50 @@ GLFWAPI GLFWwindow* glfwCreateWindow(int width, int height,
     return (GLFWwindow*) window;
 }
 
+GLFWAPI GLFWwindow* glfwAttachWindow(intptr_t nativeWindow, GLFWwindow* share) {
+  _GLFWfbconfig fbconfig;
+  _GLFWctxconfig ctxconfig;
+  _GLFWwndconfig wndconfig;
+  _GLFWwindow* window;
+
+  _GLFW_REQUIRE_INIT_OR_RETURN(NULL);
+
+  fbconfig  = _glfw.hints.framebuffer;
+  ctxconfig = _glfw.hints.context;
+  wndconfig = _glfw.hints.window;
+
+  ctxconfig.share = (_GLFWwindow*) share;
+  if (ctxconfig.share)
+  {
+    if (ctxconfig.client == GLFW_NO_API ||
+      ctxconfig.share->context.client == GLFW_NO_API)
+    {
+      _glfwInputError(GLFW_NO_WINDOW_CONTEXT, NULL);
+      return NULL;
+    }
+  }
+
+  if (!_glfwIsValidContextConfig(&ctxconfig))
+    return NULL;
+
+  window = calloc(1, sizeof(_GLFWwindow));
+  window->next = _glfw.windowListHead;
+  _glfw.windowListHead = window;
+
+  window->autoIconify = wndconfig.autoIconify;
+  window->cursorMode  = GLFW_CURSOR_NORMAL;
+  window->external    = true;
+
+  window->minwidth    = GLFW_DONT_CARE;
+  window->minheight   = GLFW_DONT_CARE;
+  window->maxwidth    = GLFW_DONT_CARE;
+  window->maxheight   = GLFW_DONT_CARE;
+  window->numer       = GLFW_DONT_CARE;
+  window->denom       = GLFW_DONT_CARE;
+
+//  if (!_glfw.platform.attachWindow())
+}
+
 void glfwDefaultWindowHints(void)
 {
     _GLFW_REQUIRE_INIT();