| <!-- |
| Copyright (c) 2020 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>Verify precision side effects (Adreno driver bug)</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> |
| </head> |
| <body> |
| <canvas id="canvas" width="2" height="2"> </canvas> |
| <div id="description"></div> |
| <div id="console"></div> |
| |
| <script id="vshader-simple" type="x-shader/x-vertex">#version 300 es |
| in vec3 aPosition; |
| |
| void main() { |
| gl_Position = vec4(aPosition, 1.0); |
| } |
| </script> |
| <script id="fshader-int" type="x-shader/x-fragment">#version 300 es |
| out highp vec4 myFragColor; |
| void main() { |
| highp int t; |
| t = 0 | (int(t == t) * 0x8000); |
| |
| if (t == 0x8000) |
| myFragColor = vec4(1.0, 0.0, 0.0, 1.0); |
| else |
| myFragColor = vec4(0.0, 0.0, 0.0, 1.0); |
| } |
| </script> |
| <script id="fshader-ivec2" type="x-shader/x-fragment">#version 300 es |
| out highp vec4 myFragColor; |
| void main() { |
| highp ivec2 t; |
| t = 0 | (ivec2(t == t) * 0x8000); |
| |
| if (t == ivec2(0x8000)) |
| myFragColor = vec4(1.0, 0.0, 0.0, 1.0); |
| else |
| myFragColor = vec4(0.0, 0.0, 0.0, 1.0); |
| } |
| </script> |
| <script id="fshader-ivec3" type="x-shader/x-fragment">#version 300 es |
| out highp vec4 myFragColor; |
| void main() { |
| highp ivec3 t; |
| t = 0 | (ivec3(t == t) * 0x8000); |
| |
| if (t == ivec3(0x8000)) |
| myFragColor = vec4(1.0, 0.0, 0.0, 1.0); |
| else |
| myFragColor = vec4(0.0, 0.0, 0.0, 1.0); |
| } |
| </script> |
| <script id="fshader-ivec4" type="x-shader/x-fragment">#version 300 es |
| out highp vec4 myFragColor; |
| void main() { |
| highp ivec4 t; |
| t = 0 | (ivec4(t == t) * 0x8000); |
| |
| if (t == ivec4(0x8000)) |
| myFragColor = vec4(1.0, 0.0, 0.0, 1.0); |
| else |
| myFragColor = vec4(0.0, 0.0, 0.0, 1.0); |
| } |
| </script> |
| <script type="application/javascript"> |
| "use strict"; |
| description("Verify precision side effects"); |
| debug(""); |
| debug("When this test is run on Adreno (no repros on other vendors so far):"); |
| debug(" - the result of the expression 0 | (int(e0 == e0) * 0x8000) somehow returns -32768 instead of 32768 despite the variable using highp precision;"); |
| debug(" - splitting the expression along | fixes the issue (could also be observed with other operators)."); |
| debug('For additional reference see this <a href="https://github.com/KhronosGroup/WebGL/pull/3192">pull request</a> and <a href="http://crbug.com/1155942">Chromium bug</a>'); |
| debug(""); |
| var wtu = WebGLTestUtils; |
| function test() { |
| var gl = wtu.create3DContext("canvas", undefined, 2); |
| if (!gl) { |
| testFailed("context does not exist"); |
| return; |
| } |
| wtu.setupUnitQuad(gl); |
| |
| var testCases = [ |
| { vshader: "vshader-simple", fshader: "fshader-int", desc: "fragment shader int" }, |
| { vshader: "vshader-simple", fshader: "fshader-ivec2", desc: "fragment shader ivec2" }, |
| { vshader: "vshader-simple", fshader: "fshader-ivec3", desc: "fragment shader ivec3" }, |
| { vshader: "vshader-simple", fshader: "fshader-ivec4", desc: "fragment shader ivec4" }, |
| ]; |
| |
| for (var idx = 0; idx < testCases.length; ++idx) { |
| var test = testCases[idx]; |
| |
| debug(""); |
| var program = wtu.setupProgram(gl, [test.vshader, test.fshader], ["aPosition"]); |
| if (!program) { |
| testFailed("Fail to set up program"); |
| } else { |
| debug("Testing " + test.desc); |
| wtu.drawUnitQuad(gl); |
| wtu.checkCanvas(gl, [255, 0, 0, 255]); |
| gl.deleteProgram(program); |
| wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Should be no errors from testing"); |
| } |
| } |
| }; |
| |
| test(); |
| |
| debug(""); |
| var successfullyParsed = true; |
| </script> |
| <script src="../../js/js-test-post.js"></script> |
| </body> |
| </html> |
