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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
commit | 6bf0a5cb5034a7e684dcc3500e841785237ce2dd (patch) | |
tree | a68f146d7fa01f0134297619fbe7e33db084e0aa /dom/canvas/test/webgl-conf/checkout/conformance/glsl/bugs/pow-of-small-constant-in-user-defined-function.html | |
parent | Initial commit. (diff) | |
download | thunderbird-upstream.tar.xz thunderbird-upstream.zip |
Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'dom/canvas/test/webgl-conf/checkout/conformance/glsl/bugs/pow-of-small-constant-in-user-defined-function.html')
-rw-r--r-- | dom/canvas/test/webgl-conf/checkout/conformance/glsl/bugs/pow-of-small-constant-in-user-defined-function.html | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/glsl/bugs/pow-of-small-constant-in-user-defined-function.html b/dom/canvas/test/webgl-conf/checkout/conformance/glsl/bugs/pow-of-small-constant-in-user-defined-function.html new file mode 100644 index 0000000000..d5fa55b898 --- /dev/null +++ b/dom/canvas/test/webgl-conf/checkout/conformance/glsl/bugs/pow-of-small-constant-in-user-defined-function.html @@ -0,0 +1,74 @@ +<!-- +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>Bug - calculating powers of constants smaller than 1.0e-5 in user-defined functions should work</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="256" height="256"> </canvas> +<div id="description"></div> +<div id="console"></div> +<script id="vshader" type="x-shader/x-vertex"> +attribute vec3 aPosition; + +void main() { + gl_Position = vec4(aPosition, 1); +} +</script> +<script id="fshader" type="x-shader/x-fragment"> +precision highp float; + +float fun(float arg) { + // These values are still easily within the highp range. + // The minimum range in terms of 10's exponent is around -19 to 19, and IEEE-754 single precision range is higher than that. + return 1.0e12 * pow(arg, 2.0); +} + +void main() { + // Note that the bug did not reproduce if an uniform was passed to the function instead of a constant, + // or if the expression was moved outside the user-defined function. + const float a = 1.0e-6; + float b = fun(a); + if (abs(b - 1.0) < 0.01) { + gl_FragColor = vec4(0.0, 1.0, 0.0, 1.0); // green + } else { + gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0); // red + } +} +</script> +<script type="application/javascript"> +"use strict"; +description(); +debug(""); +var wtu = WebGLTestUtils; +function test() { + var gl = wtu.create3DContext("canvas"); + if (!gl) { + testFailed("context does not exist"); + return; + } + if (gl.getShaderPrecisionFormat(gl.FRAGMENT_SHADER, gl.HIGH_FLOAT).precision == 0) { + testPassed("highp precision not supported"); + } else { + wtu.setupUnitQuad(gl); + var program = wtu.setupProgram(gl, ["vshader", "fshader"], ["aPosition"], undefined, true); + wtu.drawUnitQuad(gl); + wtu.checkCanvasRect(gl, 0, 0, 256, 256, [0, 255, 0, 255]); + } +}; + +test(); +finishTest(); +</script> +</body> +</html> + |