gl-get-uniform-non-current-program.html

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<meta charset="utf-8">

<title>WebGL getUniform from non-current program</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>

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

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

<canvas id="example" width="2" height="2"> </canvas>

    <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">

        precision mediump float;

        uniform float color;

        void main()

            gl_FragColor = vec4(color);

    </script>

<script>

"use strict";

description("This test ensures WebGL implementations handle getUniform when the program is not the current program");

debug("");

var wtu = WebGLTestUtils;

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

var program1 = wtu.setupProgram(gl, ["vshader", "fshader"], ["vPosition"]);

var program2 = wtu.setupProgram(gl, ["vshader", "fshader"], ["vPosition"]);

var loc = gl.getUniformLocation(program1, "color");

debug("check we can call getUniform when the program is current")

gl.useProgram(program1);

shouldBe("gl.getUniform(program1, loc)", "0");

debug("check we can call getUniform when a different program is current")

gl.useProgram(program2);

shouldBe("gl.getUniform(program1, loc)", "0");

debug("check we can call getUniform when no program is current")

gl.useProgram(null);

shouldBe("gl.getUniform(program1, loc)", "0");

debug("check we can call getUniform when the program is current")

gl.useProgram(program1);

gl.uniform1f(loc, 123)

shouldBe("gl.getUniform(program1, loc)", "123");

debug("check we can call getUniform when a different program is current")

gl.useProgram(program2);

shouldBe("gl.getUniform(program1, loc)", "123");

debug("check we can call getUniform when no program is current")

gl.useProgram(null);

shouldBe("gl.getUniform(program1, loc)", "123");

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

debug("");

var successfullyParsed = true;

</script>

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