dom/canvas/test/webgl-conf/checkout/conformance/uniforms/gl-get-uniform-non-current-program.html

   1 <!--
   2 Copyright (c) 2022 The Khronos Group Inc.
   3 Use of this source code is governed by an MIT-style license that can be
   4 found in the LICENSE.txt file.
   5 -->
   6
   7 <!DOCTYPE html>
   8 <html>
   9 <head>
  10 <meta charset="utf-8">
  11 <title>WebGL getUniform from non-current program</title>
  12 <link rel="stylesheet" href="../../resources/js-test-style.css"/>
  13 <script src="../../js/js-test-pre.js"></script>
  14 <script src="../../js/webgl-test-utils.js"></script>
  15 </head>
  16 <body>
  17 <div id="description"></div>
  18 <div id="console"></div>
  19 <canvas id="example" width="2" height="2"> </canvas>
  20     <script id="vshader" type="x-shader/x-vertex">
  21         attribute vec4 vPosition;
  22         void main()
  23         {
  24             gl_Position = vPosition;
  25         }
  26     </script>
  27
  28     <script id="fshader" type="x-shader/x-fragment">
  29         precision mediump float;
  30         uniform float color;
  31         void main()
  32         {
  33             gl_FragColor = vec4(color);
  34         }
  35     </script>
  36 <script>
  37 "use strict";
  38 description("This test ensures WebGL implementations handle getUniform when the program is not the current program");
  39
  40 debug("");
  41
  42 var wtu = WebGLTestUtils;
  43 var gl = wtu.create3DContext("example");
  44 var program1 = wtu.setupProgram(gl, ["vshader", "fshader"], ["vPosition"]);
  45 var program2 = wtu.setupProgram(gl, ["vshader", "fshader"], ["vPosition"]);
  46 var loc = gl.getUniformLocation(program1, "color");
  47
  48 debug("check we can call getUniform when the program is current")
  49 gl.useProgram(program1);
  50 shouldBe("gl.getUniform(program1, loc)", "0");
  51 debug("check we can call getUniform when a different program is current")
  52 gl.useProgram(program2);
  53 shouldBe("gl.getUniform(program1, loc)", "0");
  54 debug("check we can call getUniform when no program is current")
  55 gl.useProgram(null);
  56 shouldBe("gl.getUniform(program1, loc)", "0");
  57
  58 debug("check we can call getUniform when the program is current")
  59 gl.useProgram(program1);
  60 gl.uniform1f(loc, 123)
  61 shouldBe("gl.getUniform(program1, loc)", "123");
  62 debug("check we can call getUniform when a different program is current")
  63 gl.useProgram(program2);
  64 shouldBe("gl.getUniform(program1, loc)", "123");
  65 debug("check we can call getUniform when no program is current")
  66 gl.useProgram(null);
  67 shouldBe("gl.getUniform(program1, loc)", "123");
  68
  69
  70 wtu.glErrorShouldBe(gl, gl.NO_ERROR, "should no errors");
  71
  72 debug("");
  73 var successfullyParsed = true;
  74
  75 </script>
  76 <script src="../../js/js-test-post.js"></script>
  77
  78 </body>
  79 </html>