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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.
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<html>
<head>
<meta charset="utf-8">
<title>WebGL Default Texture Draw Bug 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>
<canvas id="c"></canvas>
<div id="description"></div>
<div id="console"></div>
<script>
"use strict";
description("This test attempts to provoke a Chrome bug that occured when drawing with textures when one was never bound. <a href='http://crbug.com/524144'>crbug.com/524144</a>");

debug("");

var wtu = WebGLTestUtils;
var gl = wtu.create3DContext("c");
var canvas = gl.canvas;

if (!gl) {
    testFailed("WebGL context does not exist");
} else {
    testPassed("WebGL context exists");

    runDrawTests();

    wtu.glErrorShouldBe(gl, gl.NO_ERROR, "there should be no errors");
}

function runDrawTests(drawType) {
    debug("Test that drawing with a texture when no textures have been bound gives the expected black output");
    canvas.width = 50; canvas.height = 50;
    gl.viewport(0, 0, canvas.width, canvas.height);

    // Set up a program that will draw with a texture
    var program = wtu.setupNoTexCoordTextureProgram(gl);

    wtu.setupIndexedQuad(gl);
    for (var i = 0 ; i < 100 && _bufferedConsoleLogs != null; ++i) {
        // Clear to white.
        gl.clearColor(1.0, 1.0, 1.0, 1.0);
        gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);

        // Draw without binding any textures.
        gl.drawElements(gl.TRIANGLES, 6, gl.UNSIGNED_SHORT, 0);

        // Check to ensure the entire canvas is black.
        wtu.checkCanvasRect(gl, 0.0, 0.0, canvas.width, canvas.height,
                [0.0, 0.0, 0.0], "Draw should pass", 2);
    }
}

debug("");
var successfullyParsed = true;
</script>
<script src="../../js/js-test-post.js"></script>

</body>
</html>
