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<!--
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.
-->
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>WebGL Draw With Integer Texture Base Level 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>
<script src="../../js/tests/tex-image-and-sub-image-utils.js"></script>
</head>
<body>
<canvas id="example" width="24" height="24"></canvas>
<div id="description"></div>
<div id="console"></div>
<script>
"use strict";
var canvas;
var wtu = WebGLTestUtils;
canvas = document.getElementById("example");
var gl = wtu.create3DContext(canvas, undefined, 2);
var tiu = TexImageUtils;
// Both Chrome and Firefox fail on this test on NVIDIA Windows, see crbug.com/679639.
function testDrawIntegerTextureBaseLevel()
{
description("This test verifies the functionality of rendering with integer texture non-zero base level.");
var green = [0, 255, 0, 255];
var width = 16;
var height = 16;
canvas.width = width;
canvas.height = height;
gl.viewport(0, 0, width, height);
var texture = gl.createTexture();
var level = 1;
gl.bindTexture(gl.TEXTURE_2D, texture);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_BASE_LEVEL, level);
wtu.fillTexture(gl, texture, width, height, green, level, gl.RGBA_INTEGER, gl.UNSIGNED_BYTE, gl.RGBA8UI);
wtu.glErrorShouldBe(gl, gl.NO_ERROR);
var program = tiu.setupTexturedQuad(gl, "RGBA8UI");
gl.drawArrays(gl.TRIANGLES, 0, 6);
wtu.glErrorShouldBe(gl, gl.NO_ERROR);
wtu.checkCanvas(gl, green);
}
testDrawIntegerTextureBaseLevel();
var successfullyParsed = true;
</script>
<script src="../../js/js-test-post.js"></script>
</body>
</html>
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