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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 drawArrays Test</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>
<canvas id="example" width="50" height="50"></canvas>
<div id="description"></div>
<div id="console"></div>
<script id="vshader" type="x-shader/x-vertex">
attribute vec4 vPosition;
void main()
{
gl_Position = vPosition;
}
</script>
<script id="fshader" type="x-shader/x-fragment">
void main()
{
gl_FragColor = vec4(1.0,0.0,0.0,1.0);
}
</script>
<script>
"use strict";
function init()
{
description(document.title);
function checkDrawArrays(mode, count, expect, msg) {
gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
gl.drawArrays(mode, 0, count);
wtu.glErrorShouldBe(gl, expect, msg);
}
var wtu = WebGLTestUtils;
var gl = wtu.create3DContext("example");
var program = wtu.setupProgram(gl, ["vshader", "fshader"], ["vPosition"]);
var vertexObject = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, vertexObject);
gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([ 0,0.5,0, -0.5,-0.5,0, 0.5,-0.5,0 ]), gl.STATIC_DRAW);
gl.enableVertexAttribArray(0);
checkDrawArrays(gl.TRIANGLES, 3,
gl.INVALID_OPERATION, "gl.DrawArrays with no buffer attached to VAO should return INVALID_OPERATION");
gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 0, 0);
checkDrawArrays(gl.TRIANGLES, 3,
gl.NO_ERROR, "can call gl.DrawArrays with gl.TRIANGLES");
checkDrawArrays(
desktopGL['QUAD_STRIP'], 4,
gl.INVALID_ENUM, "gl.DrawArrays with QUAD_STRIP should return INVALID_ENUM");
checkDrawArrays(
desktopGL['QUADS'], 4,
gl.INVALID_ENUM, "gl.DrawArrays with QUADS should return INVALID_ENUM");
checkDrawArrays(
desktopGL['POLYGON'], 4,
gl.INVALID_ENUM, "gl.DrawArrays with POLYGON should return INVALID_ENUM");
}
init();
var successfullyParsed = true;
</script>
<script src="../../js/js-test-post.js"></script>
</body>
</html>
|
