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<!DOCTYPE html>
<html>
  <head>
<meta charset="utf-8">
    <title>Tests if mipmap generation on a texture filled by an FBO works correctly</title>
    <link rel="stylesheet" href="../../resources/js-test-style.css"/>
    <script src="../../resources/js-test-pre.js"></script>
    <script src="../resources/webgl-test-utils.js"> </script>
</head>
<body>
<canvas id="example" width="24" height="24"></canvas>
<div id="description"></div>
<div id="console"></div>
<script>
"use strict";
function init(){
    var wtu = WebGLTestUtils;
    description();

    var gl = wtu.create3DContext("example");
    var program = wtu.setupTexturedQuad(gl);

    // setup render target texture //
    var texture = gl.createTexture();
    gl.bindTexture(gl.TEXTURE_2D, texture);
    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);
    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR_MIPMAP_LINEAR);
    gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, 2, 2, 0, gl.RGBA, gl.UNSIGNED_BYTE, null);
    gl.bindTexture(gl.TEXTURE_2D, null);

    // setup framebuffer //
    var fbo = gl.createFramebuffer();
    gl.bindFramebuffer(gl.FRAMEBUFFER, fbo);
    gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, texture, 0);
    gl.bindFramebuffer(gl.FRAMEBUFFER, null);

    // fill the framebuffer //
    gl.bindFramebuffer(gl.FRAMEBUFFER, fbo);
    gl.clearColor(1, 0, 1, 1);
    gl.clear(gl.COLOR_BUFFER_BIT);
    gl.bindFramebuffer(gl.FRAMEBUFFER, null);

    // generate mipmap //
    gl.bindTexture(gl.TEXTURE_2D, texture);
    gl.generateMipmap(gl.TEXTURE_2D);

    gl.drawArrays(gl.TRIANGLES, 0, 6);

    // readback //
    wtu.checkCanvas(gl, [255, 0, 255, 255]);
}

init();
var successfullyParsed = true;
</script>
<script src="../../resources/js-test-post.js"></script>

</body>
</html>