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Copyright (c) 2020 The Khronos Group Inc.
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<html>
<head>
<meta charset="utf-8">
<title>Verify (uint(int) >> 31) works correctly (Adreno driver bug)</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>
</head>
<body>
<canvas id="canvas" width="2" height="2"> </canvas>
<div id="description"></div>
<div id="console"></div>
<script id="vshader-uint-1" type="x-shader/x-vertex">#version 300 es
in vec3 aPosition;
flat out highp uint uvalue;
uniform highp int ivalue;

void main() {
    gl_Position = vec4(aPosition, 1);
    uvalue = uint(ivalue) >> 31u;
}
</script>
<script id="fshader-uint-1" type="x-shader/x-fragment">#version 300 es
flat in highp uint uvalue;
out highp vec4 myFragColor;

void main() {
    if (uvalue == 1u)
        myFragColor = vec4(1.0, 0.0, 0.0, 1.0);
    else
        myFragColor = vec4(0.0, 0.0, 0.0, 1.0);
}
</script>

<script id="vshader-simple" type="x-shader/x-vertex">#version 300 es
in vec3 aPosition;

void main() {
    gl_Position = vec4(aPosition, 1);
}
</script>
<script id="fshader-uint-2" type="x-shader/x-fragment">#version 300 es
uniform highp int ivalue;
out highp vec4 myFragColor;

void main() {
    uint uvalue = uint(ivalue) >> 31u;

    if (uvalue == 1u)
        myFragColor = vec4(1.0, 0.0, 0.0, 1.0);
    else
        myFragColor = vec4(0.0, 0.0, 0.0, 1.0);
}
</script>

<script type="application/javascript">
"use strict";
description("Verify (uint(int) >> 31) works correctly");
debug("");
var wtu = WebGLTestUtils;
function test() {
    var gl = wtu.create3DContext("canvas", undefined, 2);
    if (!gl) {
        testFailed("context does not exist");
        return;
    }
    wtu.setupUnitQuad(gl);

    var testCases = [
        { vshader: "vshader-uint-1", fshader: "fshader-uint-1", desc: "vertex shader uint" },
        { vshader: "vshader-simple", fshader: "fshader-uint-2", desc: "fragment shader uint" },
    ];

    for (var idx = 0; idx < testCases.length; ++idx) {
        var test = testCases[idx];

        debug("");
        var program = wtu.setupProgram(gl, [test.vshader, test.fshader], ["aPosition"]);
        if (!program) {
            testFailed("Fail to set up program");
        } else {
            var uniformLoc = gl.getUniformLocation(program, 'ivalue');
            gl.uniform1i(uniformLoc, -1);
            wtu.drawUnitQuad(gl);
            wtu.checkCanvas(gl, [255, 0, 0, 255]);
            gl.deleteProgram(program);
            wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Should be no errors from testing");
        }
    }
};

test();

debug("");
var successfullyParsed = true;
</script>
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