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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Short circuit in loop condition test</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>
<div id="description"></div>
<div id="console"></div>
<script id="vertex-shader" type="x-shader/x-vertex">#version 300 es
  precision highp float;
  in vec4 aPosition;

  void main() {
    gl_Position = aPosition;
  }
</script>
<script id="fshaderWhile" type="x-shader/x-fragment">#version 300 es
precision mediump float;
uniform bool u;
out vec4 result;
int sideEffectCounter;

bool foo() {
  ++sideEffectCounter;
  return true;
}

void main() {
  sideEffectCounter = 0;
  int iterations = 0;

  while(u && foo()) {
    ++iterations;
    if (iterations >= 10) {
      break;
    }
  }

  bool success = (u && sideEffectCounter == 10) || (!u && sideEffectCounter == 0);
  result = success ? vec4(0, 1.0, 0, 1.0) : vec4(0, 1.0, 0, 0);
}
</script>
<script id="fshaderFor" type="x-shader/x-fragment">#version 300 es
precision mediump float;
uniform bool u;
out vec4 result;
int sideEffectCounter;

bool foo() {
  ++sideEffectCounter;
  return true;
}

void main() {
  sideEffectCounter = 0;
  for(int iterations = 0; true; u && foo()) {
    ++iterations;
    if (iterations > 10) {
      break;
    }
  }

  bool success = (u && sideEffectCounter == 10) || (!u && sideEffectCounter == 0);
  result = success ? vec4(0, 1.0, 0, 1.0) : vec4(0, 1.0, 0, 0);
}
</script>
<script id="fshaderDoWhile" type="x-shader/x-fragment">#version 300 es
precision mediump float;
uniform bool u;
out vec4 result;
int sideEffectCounter;

bool foo() {
  ++sideEffectCounter;
  return true;
}

void main() {
  sideEffectCounter = 0;
  int iterations = 0;

  do {
    ++iterations;
    if (iterations > 10) {
      break;
    }
  } while (u && foo());

  bool success = (u && sideEffectCounter == 10) || (!u && sideEffectCounter == 0);
  result = success ? vec4(0, 1.0, 0, 1.0) : vec4(0, 1.0, 0, 0);
}
</script>
<script id="fshaderSequence" type="x-shader/x-fragment">#version 300 es
precision mediump float;
uniform bool u;
out vec4 result;
int sideEffectCounter;

bool foo() {
  ++sideEffectCounter;
  return true;
}

void main() {
  sideEffectCounter = 0;
  int iterations = 0;

  while(u, u && foo()) {
    ++iterations;
    if (iterations >= 10) {
      break;
    }
  }

  bool success = (u && sideEffectCounter == 10) || (!u && sideEffectCounter == 0);
  result = success ? vec4(0, 1.0, 0, 1.0) : vec4(0, 1.0, 0, 0);
}
</script>
<script type="text/javascript">
"use strict";
description("Test behavior of a short-circuiting operator in a loop using a function call with side effects");

var wtu = WebGLTestUtils;
var gl = wtu.create3DContext(undefined, undefined, 2);
wtu.setupUnitQuad(gl);

var testShader = function(fshaderId, subTestDescription) {
    debug("");
    debug(subTestDescription);
    var program = wtu.setupProgram(gl, ["vertex-shader", fshaderId], ['aPosition'], undefined, true);
    if (!program) {
        testFailed('Program compilation failed');
        return;
    }

    debug("Test short-circuiting operator with a true condition.");
    gl.uniform1i(gl.getUniformLocation(program, "u"), 1);
    wtu.clearAndDrawUnitQuad(gl);
    wtu.checkCanvas(gl, [0, 255, 0, 255], "should be green", 0);

    debug("SKIP: 1 case skipped: crbug.com/695685");
    return;

    debug("Test short-circuiting operator with a false condition.");
    gl.uniform1i(gl.getUniformLocation(program, "u"), 0);
    wtu.clearAndDrawUnitQuad(gl);
    wtu.checkCanvas(gl, [0, 255, 0, 255], "should be green", 0);
};

if (!gl) {
    testFailed("context does not exist");
} else {
    testShader("fshaderWhile", "in while loop condition");
    testShader("fshaderFor", "in for loop expression");
    testShader("fshaderDoWhile", "in do-while loop condition");
    testShader("fshaderSequence", "inside a sequence in while loop condition");
}
var successfullyParsed = true;
finishTest();
</script>
</body>
</html>
