1 files changed, 123 insertions, 0 deletions
diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/glsl/misc/shader-with-too-many-uniforms.html b/dom/canvas/test/webgl-conf/checkout/conformance/glsl/misc/shader-with-too-many-uniforms.html
new file mode 100644
index 0000000000..b5e87f9c85
--- /dev/null
+++ b/dom/canvas/test/webgl-conf/checkout/conformance/glsl/misc/shader-with-too-many-uniforms.html
@@ -0,0 +1,123 @@
+<!--
+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="vshader" type="x-shader/x-vertex">
+attribute vec4 a_position;
+void main()
+{
+    gl_Position = a_position;
+}
+</script>
+<script id="vshader-max" type="x-shader/x-vertex">
+attribute vec4 a_position;
+uniform vec4 u_color[$(maxUniformVectors)];
+void main()
+{
+    vec4 v = vec4(0, 0, 0, 0);
+    for (int i = 0; i < $(maxUniformVectors); ++i) {
+        v = v + vec4(u_color[i]);
+    }
+    gl_Position = a_position + v;
+}
+</script>
+<script id="fshader" type="x-shader/x-fragment">
+precision mediump float;
+void main()
+{
+    gl_FragColor = vec4(0, 1, 0, 1);
+}
+</script>
+<script id="fshader-max" type="x-shader/x-fragment">
+precision mediump float;
+uniform vec4 u_color[$(maxUniformVectors)];
+void main()
+{
+    vec4 v = vec4(0, 0, 0, 0);
+    for (int i = 0; i < $(maxUniformVectors); ++i) {
+        v = v + vec4(u_color[i]);
+    }
+    gl_FragColor = v;
+}
+</script>
+<script>
+"use strict";
+description("checks shader with too many uniforms fails");
+
+var wtu = WebGLTestUtils;
+var gl = wtu.create3DContext();
+var maxFragmentUniformVectors = gl.getParameter(gl.MAX_FRAGMENT_UNIFORM_VECTORS);
+var maxVertexUniformVectors = gl.getParameter(gl.MAX_VERTEX_UNIFORM_VECTORS);
+
+// Up to 2 uniform vector registers may be spent for literal constants in
+// vshader-max or fshader-max code. One vector row is used for the vec4, and
+// another may be used for integer constants that are allowed to be treated
+// internally as floats and are packable to the space of one row. This is
+// according to the GLSL ES variable packing algorithm detailed in Section 7 of
+// Appendix A of the GLSL ES Specification 10.0.17.
+var maxVectorStorageUsedForLiterals = 2;
+
+var tests = [
+ { desc: "using all uniforms in vertex shader should succeed",
+   maxUniformVectors: maxVertexUniformVectors - maxVectorStorageUsedForLiterals,
+   vShader: "vshader-max",
+   fShader: "fshader",
+   success: true,
+ },
+ { desc: "using too many uniforms in vertex shader should fail",
+   maxUniformVectors: maxVertexUniformVectors + 1,
+   vShader: "vshader-max",
+   fShader: "fshader",
+   color: [0, 1, 0, 1],
+   success: false,
+ },
+ { desc: "using all uniforms in fragment shader should succeed",
+   maxUniformVectors: maxFragmentUniformVectors - maxVectorStorageUsedForLiterals,
+   vShader: "vshader",
+   fShader: "fshader-max",
+   success: true,
+ },
+ { desc: "using too many uniforms in fragment shader should fail",
+   maxUniformVectors: maxFragmentUniformVectors + 1,
+   vShader: "vshader",
+   fShader: "fshader-max",
+   color: [0, 1, 0, 1],
+   success: false,
+ },
+];
+
+var glslTests = [];
+
+for (var ii = 0; ii < tests.length; ++ii) {
+  var test = tests[ii];
+  var vSrc = wtu.replaceParams(wtu.getScript(test.vShader), test);
+  var fSrc = wtu.replaceParams(wtu.getScript(test.fShader), test);
+  glslTests.push({
+    vShaderSource: vSrc,
+    fShaderSource: fSrc,
+    linkSuccess: test.success,
+    passMsg: 'shader ' + test.desc,
+  });
+}
+
+GLSLConformanceTester.runTests(glslTests);
+var successfullyParsed = true;
+</script>
+</body>
+</html>