1 files changed, 83 insertions, 0 deletions
diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/glsl/misc/shader-precision-format-obeyed.html b/dom/canvas/test/webgl-conf/checkout/conformance/glsl/misc/shader-precision-format-obeyed.html
new file mode 100644
index 0000000000..4574846469
--- /dev/null
+++ b/dom/canvas/test/webgl-conf/checkout/conformance/glsl/misc/shader-precision-format-obeyed.html
@@ -0,0 +1,83 @@
+<!--
+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>WebGL GLSL Conformance Tests</title>
+<link rel="stylesheet" href="../../../resources/js-test-style.css"/>
+<link rel="stylesheet" href="../../../resources/glsl-feature-tests.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="fshaderWithHighPrecision" type="text/something-not-javascript">
+precision highp float;
+uniform vec4 constantColor;
+
+void main()
+{
+    gl_FragColor = constantColor;
+}
+</script>
+<script id="fshaderWhichCompilesWithHighp" type="text/something-not-javascript">
+#ifdef GL_FRAGMENT_PRECISION_HIGH
+// Something which compiles
+#else
+somethingWhichDoesNotCompile();
+#endif
+
+void main()
+{
+    gl_FragColor = vec4(0, 0, 0, 1);
+}
+</script>
+<script id="fshaderWhichCompilesWithoutHighp" type="text/something-not-javascript">
+#ifndef GL_FRAGMENT_PRECISION_HIGH
+// Something which compiles
+#else
+somethingWhichDoesNotCompile();
+#endif
+
+void main()
+{
+    gl_FragColor = vec4(0, 0, 0, 1);
+}
+</script>
+<script>
+"use strict";
+description("Checks that getShaderPrecisionFormat's return value matches whether highp is supported in fragment shaders.");
+
+var wtu = WebGLTestUtils;
+var gl = wtu.create3DContext();
+var precision = gl.getShaderPrecisionFormat(gl.FRAGMENT_SHADER, gl.HIGH_FLOAT);
+var highpSupported = (precision.rangeMin >= 62 && precision.rangeMax >= 62 && precision.precision >= 16);
+debug("highp is" + (highpSupported ? "" : " not") + " supported in fragment shaders");
+
+GLSLConformanceTester.runTests([
+{
+  fShaderId: 'fshaderWithHighPrecision',
+  fShaderSuccess: highpSupported,
+  linkSuccess: highpSupported,
+  passMsg: "getShaderPrecisionFormat's results agree with highp support in fragment shaders",
+},
+{
+  fShaderId: highpSupported ? 'fshaderWhichCompilesWithHighp' : 'fshaderWhichCompilesWithoutHighp',
+  fShaderSuccess: true,
+  linkSuccess: true,
+  passMsg: "getShaderPrecisionFormat's results agree with definition of GL_FRAGMENT_PRECISION_HIGH",
+},
+]);
+
+debug("");
+var successfullyParsed = true;
+</script>
+</body>
+</html>