uniform-location-length-limits.html (8651B)
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>