Dear All,
I have a question, When a glcontext is lost and again restored , what should be
the behaviour of associated extensions ?
I have a test case
http://www.khronos.org/registry/webgl/sdk/tests/conformance/context/context-lost-restored.html,
and in it I am confused to see that upon context restoration , test case
expects extension 's related API's to be NULL .
here is the js code snippet from above mentioned link:
function testOESVertexArrayObject() {
if (OES_vertex_array_object) {
// Extension must still be lost.
shouldBeNull("OES_vertex_array_object.createVertexArrayOES()"); // WHY ????
// Try re-enabling extension
old_OES_vertex_array_object = OES_vertex_array_object;
OES_vertex_array_object = reGetExtensionAndTestForProperty(gl,
"OES_vertex_array_object", false);
shouldBeTrue("OES_vertex_array_object.createVertexArrayOES() != null");
shouldBeTrue("old_OES_vertex_array_object.createVertexArrayOES() == null");
}
}
function testExtensions() {
testOESTextureFloat();
testOESVertexArrayObject();
// Only the WEBGL_lose_context extension should be the same object after
context lost.
new_WEBGL_lose_context = reGetExtensionAndTestForProperty(gl,
"WEBGL_lose_context", true);
}
/// this function is a callback function , which is attached to
addeventlistener in above mention link//
function testRestoredContext()
{
debug("Test restored context");
shouldBeFalse("contextRestoredEventFired");
contextRestoredEventFired = true;
shouldBeFalse("gl.isContextLost()");
shouldBe("gl.getError()", "gl.NO_ERROR");
// Validate that using old resources fails.
testResources(gl.INVALID_OPERATION);
testRendering();
// Validate new resources created in testRendering().
testResources(gl.NO_ERROR);
testExtensions();
debug("");
}
Our Webkit Nightly Build fails
shouldBeNull("OES_vertex_array_object.createVertexArrayOES()")which it
should fail , however khronous test case suite expects it to PASS , adn i
tested this on chrome on windows, that passes :(
Kindly put some light here..
regards
rsadhu
regards
RSadhu _______________________________________________
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