From e76548dd8f106b4f44cac024d6847c58cbb59339 Mon Sep 17 00:00:00 2001
From: Vladimir Vukicevic <vladimir@pobox.com>
Date: Sun, 6 Dec 2009 19:29:17 -0800
Subject: [PATCH] [webgl] revert part of previous commit, exposes strange
 latent bug

---
 content/canvas/src/WebGLContextGL.cpp | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/content/canvas/src/WebGLContextGL.cpp b/content/canvas/src/WebGLContextGL.cpp
index 96a6151bb44..6c0c37d2d88 100644
--- a/content/canvas/src/WebGLContextGL.cpp
+++ b/content/canvas/src/WebGLContextGL.cpp
@@ -2909,14 +2909,25 @@ WebGLContext::ValidateGL()
     // make sure that the opengl stuff that we need is supported
     GLint val = 0;
 
-    MakeContextCurrent();
+    // XXX this exposes some strange latent bug; what's going on?
+    //MakeContextCurrent();
 
     gl->fGetIntegerv(LOCAL_GL_MAX_VERTEX_ATTRIBS, &val);
+    if (val == 0) {
+        LogMessage("GL_MAX_VERTEX_ATTRIBS is 0!");
+        return PR_FALSE;
+    }
+
     mAttribBuffers.SetLength(val);
 
     //fprintf(stderr, "GL_MAX_VERTEX_ATTRIBS: %d\n", val);
 
     gl->fGetIntegerv(LOCAL_GL_MAX_TEXTURE_UNITS, &val);
+    if (val == 0) {
+        LogMessage("GL_MAX_TEXTURE_UNITS is 0!");
+        return PR_FALSE;
+    }
+
     mBound2DTextures.SetLength(val);
     mBoundCubeMapTextures.SetLength(val);