dom/canvas/test/webgl-conf/checkout/conformance2/glsl3/uniform-location-length-limits.html

   1 <!--
   2 Copyright (c) 2019 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 uniform location length tests</title>
  12 <link rel="stylesheet" href="../../resources/js-test-style.css"/>
  13 <link rel="stylesheet" href="../../resources/glsl-feature-tests.css"/>
  14 <script src="../../js/js-test-pre.js"></script>
  15 <script src="../../js/webgl-test-utils.js"> </script>
  16 </head>
  17 <body>
  18 <canvas id="example" width="50" height="50">
  19 There is supposed to be an example drawing here, but it's not important.
  20 </canvas>
  21 <div id="description">Verify limits on the lengths of uniform locations per WebGL 2 spec, "Maximum Uniform and Attribute Location Lengths".</div>
  22 <div id="console"></div>
  23 <script id="goodVertexShader" type="x-shader/x-vertex">
  24 // A vertex shader where the needed uniform location is exactly 1024 characters.
  25 struct Nesting2 {
  26     vec4 identifier254CharactersLong_0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345;
  27 };
  28
  29 struct Nesting1 {
  30     Nesting2 identifier256CharactersLong_012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567;
  31 };
  32
  33 uniform Nesting1 identifier512CharactersLong_0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345670123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345;
  34
  35 void main() {
  36     gl_Position = identifier512CharactersLong_0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345670123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345.identifier256CharactersLong_012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567.identifier254CharactersLong_0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345;
  37 }
  38 </script>
  39 <script id="badVertexShader" type="x-shader/x-vertex">
  40 // A vertex shader where the needed uniform location is 1025 characters.
  41 struct Nesting2 {
  42     vec4 identifier255CharactersLong_01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456;
  43 };
  44
  45 struct Nesting1 {
  46     Nesting2 identifier256CharactersLong_012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567;
  47 };
  48
  49 uniform Nesting1 identifier512CharactersLong_0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345670123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345;
  50
  51 void main() {
  52     Nesting2 temp = identifier512CharactersLong_0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345670123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345.identifier256CharactersLong_012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567;
  53     gl_Position = temp.identifier255CharactersLong_01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456;
  54 }
  55 </script>
  56 <script id="fragmentShader" type="x-shader/x-fragment">
  57 precision mediump float;
  58
  59 void main() {
  60     gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0);
  61 }
  62 </script>
  63 <script>
  64 "use strict";
  65 var wtu = WebGLTestUtils;
  66 var gl = wtu.create3DContext("example", undefined, 2);
  67 var uniform1024Name = "identifier512CharactersLong_0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345670123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345.identifier256CharactersLong_012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567.identifier254CharactersLong_0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345";
  68 var uniform1025Name = "identifier512CharactersLong_0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345670123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345.identifier256CharactersLong_012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567.identifier255CharactersLong_01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456";
  69
  70 debug("Test uniform location underneath the length limit");
  71 var program = wtu.loadProgramFromScript(gl, "goodVertexShader", "fragmentShader");
  72 shouldBe('gl.getProgramParameter(program, gl.LINK_STATUS)', 'true');
  73 var uniformLoc = gl.getUniformLocation(program, uniform1024Name);
  74 shouldBeNonNull('uniformLoc');
  75 wtu.glErrorShouldBe(gl, gl.NONE);
  76
  77 debug("Test uniform location over the length limit");
  78 program = wtu.loadProgramFromScript(gl, "badVertexShader", "fragmentShader");
  79 wtu.glErrorShouldBe(gl, gl.NONE);
  80 shouldBe('gl.getProgramParameter(program, gl.LINK_STATUS)', 'true');
  81 var uniformLoc = gl.getUniformLocation(program, uniform1025Name);
  82 wtu.glErrorShouldBe(gl, gl.INVALID_VALUE);
  83 shouldBeNull('uniformLoc');
  84
  85 var successfullyParsed = true;
  86 </script>
  87 <script src="../../js/js-test-post.js"></script>
  88 </body>
  89 </html>