| <!-- |
| 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>GLSL dynamic vector and matrix indexing test</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> |
| <script src="../../js/glsl-conformance-test.js"></script> |
| </head> |
| <body> |
| <div id="description"></div> |
| <div id="console"></div> |
| <script id="fshaderLValueVectorBeingIndexedHasSideEffects" type="x-shader/x-fragment">#version 300 es |
| precision mediump float; |
| |
| out vec4 my_FragColor; |
| |
| uniform int u_zero; |
| |
| int sideEffectCounter = 0; |
| |
| int funcWithSideEffects() { |
| sideEffectCounter++; |
| return 1; |
| } |
| |
| void main() { |
| vec4 V[2]; |
| V[0] = vec4(1.0, 2.0, 3.0, 4.0); |
| V[1] = vec4(5.0, 6.0, 7.0, 8.0); |
| // In case this is broken down to two expressions where one reads V[funcWithSideEffects()] |
| // and another writes it, it needs to be made sure that funcWithSideEffects() only gets called once. |
| V[funcWithSideEffects()][u_zero + 1]++; |
| vec4 expectedV0 = vec4(1.0, 2.0, 3.0, 4.0); |
| vec4 expectedV1 = vec4(5.0, 7.0, 7.0, 8.0); |
| float f = 1.0 - distance(V[0], expectedV0) - distance(V[1], expectedV1); |
| if (sideEffectCounter != 1) { |
| f = 0.0; |
| } |
| my_FragColor = vec4(1.0 - f, f, 0.0, 1.0); |
| } |
| </script> |
| <script type="application/javascript"> |
| "use strict"; |
| description("Dynamic indexing of vectors and matrices should work."); |
| |
| debug("This test exposes a NVidia driver bug on Linux"); |
| |
| GLSLConformanceTester.runRenderTests([ |
| { |
| fShaderId: 'fshaderLValueVectorBeingIndexedHasSideEffects', |
| fShaderSuccess: true, |
| linkSuccess: true, |
| passMsg: 'Index a vector expression that itself has side effects, in an l-value' |
| }, |
| ], 2); |
| </script> |
| </body> |
| </html> |
| |
