Bug 596032 - check and clear GL error flag after WebGL initialization - r=vladimir, a=blocking2.0

2010-09-16 12:45:01 -04:00
parent 3495944b87
commit b8c3128eb4
1 changed files with 8 additions and 0 deletions
--- a/content/canvas/src/WebGLContextValidate.cpp
+++ b/content/canvas/src/WebGLContextValidate.cpp
@@ -468,5 +468,13 @@ WebGLContext::InitAndValidateGL()
    }
 #endif

+    // notice that the point of calling GetError here is not only to check for error,
+    // it is also to reset the error flag so that a subsequent WebGL getError call will give the correct result.
+    GLenum error = gl->fGetError();
+    if (error != LOCAL_GL_NO_ERROR) {
+        LogMessage("GL error 0x%x occurred during WebGL context initialization!", error);
+        return PR_FALSE;
+    }
+
    return PR_TRUE;
 }