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<!DOCTYPE html>
<meta charset='UTF-8'>
<!--
Color Test
Clear the four quadrants of the canvas as follows:
+------+------+
| blue |black |
| | |
+------+------+
| red |green |
| | |
+------+------+
Clear with a given alpha value. What effect this has depends on the
context-creation args passed to this page.
-->
<html class='reftest-wait'>
<head>
<script type='text/javascript' src='webgl-utils.js'></script>
<script type='text/javascript'>
'use strict';
var COLOR_VALUE = 127.0 / 255.0;
var ALPHA_VALUE = 127.0 / 255.0;
function renderFrame(gl) {
gl.enable(gl.SCISSOR_TEST);
gl.scissor(0, 0, 100, 100);
gl.clearColor(COLOR_VALUE, 0.0, 0.0, ALPHA_VALUE);
gl.clear(gl.COLOR_BUFFER_BIT);
gl.scissor(100, 0, 100, 100);
gl.clearColor(0.0, COLOR_VALUE, 0.0, ALPHA_VALUE);
gl.clear(gl.COLOR_BUFFER_BIT);
gl.scissor(0, 100, 100, 100);
gl.clearColor(0.0, 0.0, COLOR_VALUE, ALPHA_VALUE);
gl.clear(gl.COLOR_BUFFER_BIT);
gl.scissor(100, 100, 100, 100);
gl.clearColor(0.0, 0.0, 0.0, ALPHA_VALUE);
gl.clear(gl.COLOR_BUFFER_BIT);
}
////////////////////////////////////////////////////////////////////////////////
// Boilerplate
var TIMEOUT_MS = 30 * 1000;
function setStatus(text) {
var elem = document.getElementById('status');
elem.innerHTML = text;
}
var gIsComplete = false;
function markComplete(statusText) {
if (!statusText)
statusText = '';
if (gIsComplete)
return;
gIsComplete = true;
setStatus(statusText);
document.documentElement.removeAttribute('class');
}
function markError(text) {
markComplete('Error: ' + text);
}
function markTimedOut() {
markError('Timed out waiting on test completion.');
}
function runFrame(gl, frameCount, maxFrameCount) {
renderFrame(gl);
frameCount++;
if (frameCount >= maxFrameCount) {
console.log('Rendered ' + frameCount + ' frames.');
markComplete();
return;
}
requestAnimationFrame(function(){
runFrame(gl, frameCount, maxFrameCount);
});
}
function runTest() {
var canvas = document.getElementById('canvas');
var gl = initGL(canvas);
if (!gl) {
markError('WebGL context creation failed.');
return;
}
var maxFrameCount = arg('frame', 1);
if (maxFrameCount < 1) {
markError('Invalid `frame` arg: ' + maxFrameCount);
return;
}
setStatus('Waiting...');
runFrame(gl, 0, maxFrameCount);
setTimeout(markTimedOut, TIMEOUT_MS);
}
</script>
</head>
<body onload='runTest();'>
<canvas id='canvas' width='200' height='200'></canvas>
<div id='status'></div>
</body>
</html>