<!--
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>GLSL vector/scalar arithmetic inside a for loop</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>
<div id="description"></div>
<div id="console"></div>
<script id="fShaderVectorMulAndAddInsideForLoop" type="x-shader/x-fragment">
void main(){
  gl_FragColor = vec4(0.0, 0.0, 0.0, 0.0);
  for (int i = 0; i < 2; i++)
  {
    gl_FragColor += (2.0 * gl_FragCoord.x);
  }
  if (gl_FragColor.g == gl_FragColor.r &&
      gl_FragColor.b == gl_FragColor.r &&
      gl_FragColor.a == gl_FragColor.r)
  {
    gl_FragColor = vec4(0, 1, 0, 1);
  }
}
</script>
<script id="fShaderVectorCompoundMulAndAddInsideForLoop" type="x-shader/x-fragment">
precision mediump float;

void main() {
  gl_FragColor = vec4(0.0, 0.0, 0.0, 0.0);
  for (int i = 0; i < 2; i++)
  {
    float x = gl_FragCoord.x;
    gl_FragColor = gl_FragColor + (x *= 2.0);
  }
  if (gl_FragColor.g == gl_FragColor.r &&
      gl_FragColor.b == gl_FragColor.r &&
      gl_FragColor.a == gl_FragColor.r)
  {
    gl_FragColor = vec4(0, 1, 0, 1);
  }
}
</script>
<script id="fShaderVectorCompoundDivAndAddInsideForLoop" type="x-shader/x-fragment">
precision mediump float;

void main() {
  gl_FragColor = vec4(0.0, 0.0, 0.0, 0.0);
  for (int i = 0; i < 2; i++)
  {
    float x = gl_FragCoord.x;
    gl_FragColor = gl_FragColor + (x /= 2.0);
  }
  if (gl_FragColor.g == gl_FragColor.r &&
      gl_FragColor.b == gl_FragColor.r &&
      gl_FragColor.a == gl_FragColor.r)
  {
    gl_FragColor = vec4(0, 1, 0, 1);
  }
}
</script>
<script type="text/javascript">
"use strict";
description();

// See http://crbug.com/772651

GLSLConformanceTester.runRenderTests([
{
  fShaderId: 'fShaderVectorMulAndAddInsideForLoop',
  fShaderSuccess: true,
  linkSuccess: true,
  passMsg: "Adding a scalar to a vector inside for loop should work."
},
{
  fShaderId: 'fShaderVectorCompoundMulAndAddInsideForLoop',
  fShaderSuccess: true,
  linkSuccess: true,
  passMsg: "Adding a scalar (target of a compound assignment/multiplication operation) to a vector inside for loop should work."
},
{
  fShaderId: 'fShaderVectorCompoundDivAndAddInsideForLoop',
  fShaderSuccess: true,
  linkSuccess: true,
  passMsg: "Adding a scalar (target of a compound assignment/division operation) to a vector inside for loop should work."
}
]);
</script>
</body>
</html>
