From aec2da83cd3276b19d1cc2675c2f0080c5097945 Mon Sep 17 00:00:00 2001
From: hendricks266 <hendricks266@1a8010ca-5511-0410-912e-c29ae57300e0>
Date: Mon, 29 Feb 2016 06:34:16 +0000
Subject: [PATCH] Add BuildGLErrorCheck(), useful for debugging GL.

git-svn-id: https://svn.eduke32.com/eduke32@5641 1a8010ca-5511-0410-912e-c29ae57300e0
---
 polymer/eduke32/build/include/glbuild.h | 6 ++++++
 polymer/eduke32/build/src/glbuild.c     | 9 +++++++++
 2 files changed, 15 insertions(+)

diff --git a/polymer/eduke32/build/include/glbuild.h b/polymer/eduke32/build/include/glbuild.h
index 4cd5f180d..7312bb98d 100644
--- a/polymer/eduke32/build/include/glbuild.h
+++ b/polymer/eduke32/build/include/glbuild.h
@@ -90,6 +90,12 @@ typedef unsigned int GLenum;
 #define GL_TEXTURE_RECTANGLE                    0x84F5
 
 
+// custom error checking
+
+extern GLenum BuildGLError;
+extern void BuildGLErrorCheck(void);
+
+
 //////// dynamic/static API wrapping ////////
 
 #if defined DYNAMIC_GL
diff --git a/polymer/eduke32/build/src/glbuild.c b/polymer/eduke32/build/src/glbuild.c
index 3b9a8fbf7..78be2d6ab 100644
--- a/polymer/eduke32/build/src/glbuild.c
+++ b/polymer/eduke32/build/src/glbuild.c
@@ -11,6 +11,15 @@
 # include "sdlayer.h"
 #endif
 
+GLenum BuildGLError;
+void BuildGLErrorCheck(void)
+{
+    volatile GLenum err;
+    while ((err = bglGetError()) != GL_NO_ERROR)
+    {
+        BuildGLError = err; // set a watchpoint/breakpoint here
+    }
+}
 
 #if defined DYNAMIC_GL