<!--
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.
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<!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>

