From 1117e9a497a936986e2cb5fbd40111f05063a8b1 Mon Sep 17 00:00:00 2001
From: David Rose <david@ddrose.com>
Date: Mon, 17 Dec 2001 19:24:19 +0000
Subject: [PATCH] support wiregl

---
 panda/src/wgldisplay/config_wgldisplay.cxx |  4 ++++
 panda/src/wgldisplay/config_wgldisplay.h   |  1 +
 panda/src/wgldisplay/wglGraphicsWindow.cxx | 11 +++++++----
 3 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/panda/src/wgldisplay/config_wgldisplay.cxx b/panda/src/wgldisplay/config_wgldisplay.cxx
index 087aaf5d3a..5a99e79b21 100644
--- a/panda/src/wgldisplay/config_wgldisplay.cxx
+++ b/panda/src/wgldisplay/config_wgldisplay.cxx
@@ -40,6 +40,10 @@ int gl_forced_pixfmt=config_wgldisplay.GetInt("gl-force-pixfmt", 0);
 
 bool bResponsive_minimized_fullscreen_window = config_wgldisplay.GetBool("responsive-minimized-fullscreen-window",false);
 
+// Set this true to not attempt to use any of the function calls that
+// will crab out WireGL.
+bool support_wiregl = config_wgldisplay.GetBool("support-wiregl", false);
+
 extern void AtExitFn(void);
 
 ////////////////////////////////////////////////////////////////////
diff --git a/panda/src/wgldisplay/config_wgldisplay.h b/panda/src/wgldisplay/config_wgldisplay.h
index f354560594..a27049327c 100644
--- a/panda/src/wgldisplay/config_wgldisplay.h
+++ b/panda/src/wgldisplay/config_wgldisplay.h
@@ -36,6 +36,7 @@ extern float gl_fps_meter_update_interval;
 extern bool gl_sync_video;
 extern int gl_forced_pixfmt;
 extern bool bResponsive_minimized_fullscreen_window;
+extern bool support_wiregl;
 
 extern EXPCL_PANDAGL void init_libwgldisplay();
 
diff --git a/panda/src/wgldisplay/wglGraphicsWindow.cxx b/panda/src/wgldisplay/wglGraphicsWindow.cxx
index 54adf78415..d49d5e7e1b 100644
--- a/panda/src/wgldisplay/wglGraphicsWindow.cxx
+++ b/panda/src/wgldisplay/wglGraphicsWindow.cxx
@@ -567,10 +567,13 @@ void wglGraphicsWindow::config(void) {
 
   _extensions_str = tmpstr;
 
-  PFNWGLGETEXTENSIONSSTRINGEXTPROC wglGetExtensionsStringEXT;
-  PFNWGLGETEXTENSIONSSTRINGARBPROC wglGetExtensionsStringARB;
-  wglGetExtensionsStringARB = (PFNWGLGETEXTENSIONSSTRINGARBPROC)wglGetProcAddress("wglGetExtensionsStringARB");
-  wglGetExtensionsStringEXT = (PFNWGLGETEXTENSIONSSTRINGEXTPROC)wglGetProcAddress("wglGetExtensionsStringEXT");
+  PFNWGLGETEXTENSIONSSTRINGEXTPROC wglGetExtensionsStringEXT = NULL;
+  PFNWGLGETEXTENSIONSSTRINGARBPROC wglGetExtensionsStringARB = NULL;
+
+  if (!support_wiregl) {
+    wglGetExtensionsStringARB = (PFNWGLGETEXTENSIONSSTRINGARBPROC)wglGetProcAddress("wglGetExtensionsStringARB");
+    wglGetExtensionsStringEXT = (PFNWGLGETEXTENSIONSSTRINGEXTPROC)wglGetProcAddress("wglGetExtensionsStringEXT");
+  }
 
   if(wglGetExtensionsStringARB!=NULL) {
        _extensions_str += " ";