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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 Conformance Tests: Verify validation for active built-in attribs</title>
<link rel="stylesheet" href="../../resources/js-test-style.css"/>
<script src="../../js/desktop-gl-constants.js"></script>
<script src="../../js/js-test-pre.js"></script>
<script src="../../js/webgl-test-utils.js"></script>
</head>
<body>
<div id="description"></div>
<canvas id="canvas" style="width: 64px; height: 64px;"> </canvas>
<div id="console"></div>
<script id="vs" type="x-shader/x-vertex">#version 300 es
void main() {
gl_Position = vec4(gl_VertexID % 2, (gl_VertexID/2) % 2, 0, 1);
}
</script>
<script id="fs" type="x-shader/x-fragment">#version 300 es
precision mediump float;
out vec4 fragColor;
void main() {
fragColor = vec4(0, 1, 0, 1);
}
</script>
<script>
"use strict";
description("This test verifies validation for active built-in attribs.");
debug("");
var wtu = WebGLTestUtils;
var canvas = document.getElementById("canvas");
var gl = wtu.create3DContext(canvas, null, 2);
if (!gl) {
testFailed("WebGL context does not exist");
} else {
testPassed("WebGL context exists");
runTests();
}
var activeInfo, attribLoc;
function runTests() {
var prog = wtu.setupProgram(gl, ["vs", "fs"]);
if (!prog) {
testFailed("Set up program failed");
return;
}
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "No GL error from set up");
var numActive = gl.getProgramParameter(prog, gl.ACTIVE_ATTRIBUTES);
if (numActive != 1) {
testFailed('ACTIVE_ATTRIBUTES should be 1.');
return;
}
testPassed('ACTIVE_ATTRIBUTES should be 1.');
activeInfo = gl.getActiveAttrib(prog, 0);
if (!activeInfo) {
testFailed('getActiveAttrib should return an info object.');
return;
}
shouldBe('activeInfo.name', '"gl_VertexID"');
attribLoc = gl.getAttribLocation(prog, 'gl_VertexID');
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Should be able to request the location of a built-in.");
shouldBe('attribLoc', '-1');
}
var successfullyParsed = true;
</script>
<script src="../../js/js-test-post.js"></script>
</body>
</html>
|
