<!--
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>Driver Bug - temp experssions should not crash</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>
<canvas id="example" width="40" height="40"> </canvas>
<div id="description"></div>
<div id="console"></div>
<script id="vshader" type="x-shader/x-vertex">
void main(){
  gl_Position = vec4(0, 0, 0, 1);
}
</script>
<script id="fshaderUniformTest" type="x-shader/x-fragment">
precision mediump float;
uniform vec4 u_uniform;
void main()
{
  vec4 temp = vec4(0, 0, 0, 0);
$(code)
  gl_FragColor = temp;
}
</script>
<script>
"use strict";
var wtu = WebGLTestUtils;
var gl = wtu.create3DContext();

var fUniformTestSource = wtu.getScript("fshaderUniformTest");

var tests = [
];
var counts = [
  { count:100,
    mustPass: true,
  },
  { count: 1000,
    mustPass: false,
  },
  { count: 10000,
    mustPass: false,
  },
];
var operators = ["+", "-", "/", "*"];
counts.forEach(function(info) {
  var generateCode = function(numVars) {
    var codes = [];
    var count = 0;
    var step = 10;
    for (var uu = 0; uu < numVars; uu += step) {
      var subCodes = [""];
      for (var vv = 0; vv < step; ++vv) {
        subCodes.push(operators[(count++) % operators.length]);
      }
      subCodes.push("");
      codes.push("  temp += " + subCodes.join("\n      u_uniform ") + ";");
    }
    return {
      code: codes.join("\n"),
    };
  };

  var subs = generateCode(info.count);
  tests.push({
    vShaderId: "vshader",
    vShaderSuccess: true,
    fShaderSource: wtu.replaceParams(fUniformTestSource, subs),
    fShaderSuccess: true,
    linkSuccess: true,
    ignoreResults: !info.mustPass,
    passMsg: "shader with uniform with " + info.count + " operators in temp expressions in multiple lines",
  });
  subs.code = subs.code.replace(/\n +/g, " ")
  tests.push({
    vShaderId: "vshader",
    vShaderSuccess: true,
    fShaderSource: wtu.replaceParams(fUniformTestSource, subs),
    fShaderSuccess: true,
    linkSuccess: true,
    ignoreResults: !info.mustPass,
    passMsg: "shader with uniform with " + info.count + " operators in temp expressions in one line",
  });
});
GLSLConformanceTester.runTests(tests);
</script>
</body>
</html>

