generate-mipmap-with-large-base-level.html

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<meta charset="utf-8">

<title>Test if GenerateMipmap on immutable texture with large BASE_LEVEL triggers a 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>

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<canvas id="example" width="24" height="24"></canvas>

<div id="description"></div>

<div id="console"></div>

<script>

"use strict";

description("This is a regression test for crbug.com/913301");

debug("");

var wtu = WebGLTestUtils;

var gl = wtu.create3DContext("example", null, 2);

gl.clearColor(0, 1, 0, 1);

var targets = [gl.TEXTURE_2D, gl.TEXTURE_3D];

for (var ii = 0; ii < targets.length; ++ii) {

  gl.clear(gl.COLOR_BUFFER_BIT);

  var target = targets[ii];

  var tex = gl.createTexture();

  gl.bindTexture(target, tex);

  gl.texParameteri(target, gl.TEXTURE_BASE_LEVEL, 1416354905);

  gl.texParameteri(target, gl.TEXTURE_MAX_LEVEL, 5);

  gl.texParameteri(target, gl.TEXTURE_MIN_FILTER, gl.LINEAR_MIPMAP_LINEAR);

  gl.texParameteri(target, gl.TEXTURE_MAG_FILTER, gl.LINEAR);

  if (target == gl.TEXTURE_2D)

    gl.texStorage2D(target, 5, gl.R8, 32, 32);

  else

    gl.texStorage3D(target, 5, gl.R8, 32, 32, 32);

  // Should not crash calling generateMipmap.

  gl.generateMipmap(target);

  gl.deleteTexture(tex);

  // If crashed, readPixels() won't be able to work correctly.

  wtu.checkCanvas(gl, [0, 255, 0, 255], "should be green", 5);

  wtu.glErrorShouldBe(gl, gl.NO_ERROR);

var successfullyParsed = true;

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