delayed-drawing.html

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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 Delayed Drawing test.</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="example" width="4" height="4" style="width: 40px; height: 30px;"></canvas>

<div id="description"></div>

<div id="console"></div>

<script>

"use strict";

enableJSTestPreVerboseLogging();

description(document.title);

var wtu = WebGLTestUtils;

var gl = wtu.create3DContext("example");

var program = wtu.setupTexturedQuad(gl);

wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Should be no errors from setup.");

var tex = gl.createTexture();

wtu.fillTexture(gl, tex, 5, 3, [0, 192, 128, 255]);

var loc = gl.getUniformLocation(program, "tex");

gl.uniform1i(loc, 0);

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_WRAP_S, gl.CLAMP_TO_EDGE);

gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);

drawAndCheck();

setTimeout(step2, 1000);

function step2() {

  drawAndCheck();

  finishTest();

function drawAndCheck() {

  wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Should be no errors before drawing.");

  wtu.clearAndDrawUnitQuad(gl);

  wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Should be no errors from drawing.");

  wtu.checkCanvas(

      gl, [0, 192, 128, 255],

      "draw should be 0, 192, 128, 255");

var successfullyParsed = true;

</script>

</body>

</html>