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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>WebGL Occlusion Query Conformance Tests</title>
<link rel="stylesheet" href="../../resources/js-test-style.css"/>
<script src="../../js/js-test-pre.js"></script>
<script src="../../js/webgl-test-utils.js"></script>
</head>
<body>
<div id="description"></div>
<canvas id="canvas" style="width: 50px; height: 50px;"> </canvas>
<div id="console"></div>
<script>
"use strict";
description("This test verifies the functionality of occlusion query objects.");
debug("");
var tests = [];
var currentTest;
var currentTestIndex = 0;
var numberOfTestAttempts = 4; // Just to stress implementations a bit more.
var query;
var numberOfCompletionAttempts = 0;
function setupTests(gl) {
tests = [
{
target: gl.ANY_SAMPLES_PASSED_CONSERVATIVE,
name: "ANY_SAMPLES_PASSED_CONSERVATIVE",
result: 1,
},
{
target: gl.ANY_SAMPLES_PASSED,
name: "ANY_SAMPLES_PASSED",
result: 1,
},
];
}
function runOcclusionQueryTest() {
currentTest = tests[currentTestIndex];
debug("");
debug("Testing completion and behavior of " + currentTest.name + " occlusion query");
gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
var program = wtu.setupSimpleColorProgram(gl, 0);
gl.uniform4f(gl.getUniformLocation(program, "u_color"), 0, 1, 0, 1);
wtu.setupUnitQuad(gl, 0);
query = gl.createQuery();
var target = currentTest.target;
gl.beginQuery(target, query);
wtu.drawUnitQuad(gl);
gl.endQuery(target);
// Verify as best as possible that the implementation doesn't
// allow a query's result to become available the same frame, by
// spin-looping for some time and ensuring that none of the
// queries' results become available.
var numEarlyTests = 20000;
while (--numEarlyTests > 0) {
gl.finish();
if (gl.getQueryParameter(query, gl.QUERY_RESULT_AVAILABLE)) {
testFailed("Query's result became available too early");
finishTest();
return;
}
}
testPassed("Query's result didn't become available too early");
numberOfCompletionAttempts = 0;
requestAnimationFrame(completeOcclusionQueryTest);
}
function completeOcclusionQueryTest() {
++numberOfCompletionAttempts;
if (numberOfCompletionAttempts > 500) {
testFailed("Query didn't become available in a reasonable time");
finishTest();
return;
}
if (!gl.getQueryParameter(query, gl.QUERY_RESULT_AVAILABLE)) {
requestAnimationFrame(completeOcclusionQueryTest);
return;
}
// No matter whether the test was run with ANY_SAMPLES_PASSED or
// ANY_SAMPLES_PASSED_CONSERVATIVE, the query object should always
// report a non-zero result.
var result = gl.getQueryParameter(query, gl.QUERY_RESULT);
if (result == currentTest.result) {
testPassed("Occlusion query " + currentTest.name + " returned a correct result (" + result + ")");
} else {
testFailed("Occlusion query " + currentTest.name + " returned an incorrect result " + result + " (expected " + currentTest.result + ")");
}
gl.deleteQuery(query);
query = null;
++currentTestIndex;
if (currentTestIndex >= tests.length) {
--numberOfTestAttempts;
if (numberOfTestAttempts == 0) {
finishTest();
} else {
currentTestIndex = 0;
requestAnimationFrame(runOcclusionQueryTest);
}
} else {
requestAnimationFrame(runOcclusionQueryTest);
}
}
var wtu = WebGLTestUtils;
var canvas = document.getElementById("canvas");
var gl = wtu.create3DContext(canvas, null, 2);
if (!gl) {
testFailed("WebGL context does not exist");
} else {
testPassed("WebGL context exists");
setupTests(gl);
runOcclusionQueryTest();
}
</script>
</body>
</html>