uniform-buffers-second-compile.html

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Copyright (c) 2019 The Khronos Group Inc.

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<head>

<meta charset="utf-8">

<title>WebGL Uniform Buffers should work on second compile</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 id='vshader' type='x-shader/x-vertex'>

#version 300 es

layout(location=0) in vec4 position;

layout(std140, column_major) uniform Uniforms1 {

    mat4 transform;

};

out vec3 vColor;

void main() {

    gl_Position = transform * position;

</script>

<script id='fshader' type='x-shader/x-fragment'>

#version 300 es

precision highp float;

layout(std140) uniform Uniforms2 {

    vec4 color;

};

out vec4 fragColor;

void main(){

    fragColor = color;

</script>

</head>

<body>

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

<canvas id="canvas" style="width: 50px; height: 50px;"> </canvas>

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

<script>

"use strict";

description("This test verifies that getUniformBlockIndex isn't broken on second compile.");

debug("This is a regression test for <a href='http://crbug.com/716018'>http://crbug.com/716018</a>");

debug("");

var wtu = WebGLTestUtils;

var canvas = document.getElementById("canvas");

var gl = wtu.create3DContext(canvas, null, 2);

// Initialize

gl.clearColor(0, 0, 0, 1);

var vsSource = document.getElementById("vshader").text.trim();

var fsSource = document.getElementById("fshader").text.trim();

function runTest() {

    // Run twice to make sure that the second build does not cause errors

    // (i.e. due to caching).

    for (var i = 0; i < 2; ++i) {

        debug("Compile/test iteration " + i);

        var vertexShader = gl.createShader(gl.VERTEX_SHADER);

        gl.shaderSource(vertexShader, vsSource);

        gl.compileShader(vertexShader);

        // Note: if COMPILE_STATUS is retrieved here, it hides the bug.

        var fragmentShader = gl.createShader(gl.FRAGMENT_SHADER);

        gl.shaderSource(fragmentShader, fsSource);

        gl.compileShader(fragmentShader);

        // Note: if COMPILE_STATUS is retrieved here, it hides the bug.

        var program = gl.createProgram();

        gl.attachShader(program, vertexShader);

        gl.attachShader(program, fragmentShader);

        gl.linkProgram(program);

        gl.useProgram(program);

        var uniforms1Location = gl.getUniformBlockIndex(program, "Uniforms1");

        gl.uniformBlockBinding(program, uniforms1Location, 0);

        wtu.glErrorShouldBe(gl, gl.NO_ERROR, "uniforms1Location was " + uniforms1Location);

        var uniforms2Location = gl.getUniformBlockIndex(program, "Uniforms2");

        gl.uniformBlockBinding(program, uniforms2Location, 1);

        wtu.glErrorShouldBe(gl, gl.NO_ERROR, "uniforms2Location was " + uniforms2Location);

        debug("");

runTest();

var successfullyParsed = true;

</script>

<script src="../../js/js-test-post.js"></script>

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