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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<!--
Copyright (c) 2019 The Khronos Group Inc.
Use of this source code is governed by an MIT-style license that can be
found in the LICENSE.txt file.
-->
<link rel="stylesheet" type="text/css" href="../unit.css" />
<script type="application/javascript" src="../unit.js"></script>
<script type="application/javascript" src="../util.js"></script>
<script type="application/javascript">
Tests.startUnit = function () {
var canvas = document.getElementById('gl');
var gl = wrapGLContext(getGLContext(canvas));
return [gl];
}
Tests.testReadPixels = function(gl) {
var id = new Uint8Array(16 * 16 * 4);
assertOk(function(){gl.readPixels(0,0,1,1,gl.RGBA, gl.UNSIGNED_BYTE, id);});
assertOk(function(){gl.readPixels(0,0,16,16,gl.RGBA, gl.UNSIGNED_BYTE, id);});
assertOk(function(){gl.readPixels(15,15,1,1,gl.RGBA, gl.UNSIGNED_BYTE, id);});
}
Tests.testReadPixelsRGBA = function(gl) {
gl.clearColor(1, 0, 1, 0);
gl.clear(gl.COLOR_BUFFER_BIT);
var id = new Uint8Array(4);
gl.readPixels(1,2,1,1,gl.RGBA, gl.UNSIGNED_BYTE, id);
assertArrayEquals([255, 0, 255, 0], id);
}
Tests.endUnit = function(gl) {
}
</script>
<style>canvas{ position:absolute; }</style>
</head><body>
<canvas id="gl" width="16" height="16"></canvas>
</body></html>
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