<!--
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>ESSL300 sampler array indexing rules</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="vs" type="text/plain">#version 300 es
void main() {}
</script>
<script id="fs_constant_integer_expression" type="text/plain">#version 300 es
precision mediump float;
uniform sampler2D u_tex[2];

void main()
{
  texture(u_tex[0], vec2(0));
  texture(u_tex[1], vec2(0));
}
</script>
<script id="fs_constant_index_expression" type="text/plain">#version 300 es
precision mediump float;
uniform sampler2D u_tex[2];

void main()
{
  for (int i = 0; i < 2; i++) {
    texture(u_tex[i], vec2(0));
  }
}
</script>
<script id="fs_constant_integer_expression_switch" type="text/plain">#version 300 es
precision mediump float;
uniform sampler2D u_tex[2];

void main()
{
  for (int i = 0; i < 2; i++) {
    switch (i) {
      case 0:
        texture(u_tex[0], vec2(0));
        break;
      case 1:
        texture(u_tex[1], vec2(0));
        break;
    }
  }
}
</script>
<script type="application/javascript">
"use strict";
description();
GLSLConformanceTester.runTests([
  {
    vShaderId: "vs",
    vShaderSuccess: true,
    fShaderId: "fs_constant_integer_expression",
    fShaderSuccess: true,
    linkSuccess: true,
    passMsg: "indexing into an array of samplers with constant-integer-expression is required",
  },
  {
    vShaderId: "vs",
    vShaderSuccess: true,
    fShaderId: "fs_constant_index_expression",
    fShaderSuccess: false,
    linkSuccess: false,
    passMsg: "indexing into an array of samplers with constant-index-expression is forbidden in essl300",
  },
  {
    vShaderId: "vs",
    vShaderSuccess: true,
    fShaderId: "fs_constant_integer_expression_switch",
    fShaderSuccess: true,
    linkSuccess: true,
    passMsg: "constant-index-expression can be converted into fs_constant_integer_expression via a switch",
  },
], 2);
</script>
</body>
</html>
