tex-base-level-bug.html

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<title>WebGL2 texture base level bug conformance 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>

<script src="../../../js/tests/tex-image-and-sub-image-utils.js"></script>

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<canvas id="example" width="2" height="2" style="width: 2px; height: 2px;"></canvas>

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

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

<script>

"use strict";

description(document.title);

var wtu = WebGLTestUtils;

var canvas = document.getElementById("example");

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

var tiu = TexImageUtils;

wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Should be no errors from setup.");

function runtest() {

  debug("");

  debug("This is a regression test for <a href='https://crbug.com/705865'>Chromium Issue 705865</a>");

  var tex = gl.createTexture();

  var program = tiu.setupTexturedQuad(gl, "RGBA");

  // Test that filling partial levels is enough for mipmapping.

  var width = 2;

  var height = 2;

  gl.bindTexture(gl.TEXTURE_2D, tex);

  wtu.fillTexture(gl, tex, width, height, [255, 0, 0, 255], 2, gl.RGBA, gl.UNSIGNED_BYTE);

  gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_BASE_LEVEL, 2);

  gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);

  gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);

  wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Texture setup should succeed");

  canvas.width = width;

  canvas.height = height;

  gl.viewport(0, 0, width, height);

  wtu.clearAndDrawUnitQuad(gl);

  wtu.glErrorShouldBe(gl, gl.NO_ERROR, "clearAndDrawQuad should succeed");

  wtu.checkCanvas(gl, [255, 0, 0, 255], "should draw with [255, 0, 0, 255]");

  width = 1;

  height = 1;

  gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, width, height, 0, gl.RGBA, gl.UNSIGNED_BYTE, null);

  wtu.glErrorShouldBe(gl, gl.NO_ERROR, "texImage2D should succeed");

  wtu.clearAndDrawUnitQuad(gl);

  wtu.checkCanvas(gl, [255, 0, 0, 255], "should draw with [255, 0, 0, 255]");

  wtu.glErrorShouldBe(gl, gl.NO_ERROR,"checkCanvas should succeed");

  gl.deleteTexture(tex);

};

runtest();

var successfullyParsed = true;

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