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<!DOCTYPE html>↩
<html>↩
<head>↩
<meta charset="utf-8">↩
<title>WebGL OES_fbo_render_mipmap Conformance Tests</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="128" height="128"></canvas>↩
<div id="description"></div>↩
<div id="console"></div>↩
<script>↩
"use strict";↩
description("This test verifies the functionality of the OES_fbo_render_mipmap extension, if it is available.");↩
↩
var wtu = WebGLTestUtils;↩
var canvas = document.getElementById("canvas");↩
var gl = wtu.create3DContext(canvas);↩
var ext = null;↩
↩
(function(){↩
↩
const oesFboRenderMipmap = gl.getExtension("OES_fbo_render_mipmap");↩
if (!oesFboRenderMipmap) {↩
testPassed("OES_fbo_render_mipmap is allowed to be missing.");↩
return;↩
}↩
↩
let texture = gl.createTexture();↩
gl.bindTexture(gl.TEXTURE_2D, texture);↩
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);↩
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST_MIPMAP_NEAREST);↩
↩
let colors = [↩
[255, 0, 0, 255],↩
[255, 127, 0, 255],↩
[255, 255, 0, 255],↩
[0, 255, 0, 255],↩
[0, 255, 255, 255],↩
[0, 127, 255, 255],↩
[0, 0, 255, 255],↩
[255, 0, 255, 255],↩
];↩
↩
let fbos = [];↩
let maxLevel = 7;↩
for (let level = 0; level <= maxLevel; level++) {↩
let size = Math.pow(2, maxLevel - level);↩
gl.texImage2D(gl.TEXTURE_2D, level, gl.RGBA, size, size, 0, gl.RGBA, gl.UNSIGNED_BYTE, null);↩
let fbo = gl.createFramebuffer();↩
gl.bindFramebuffer(gl.FRAMEBUFFER, fbo);↩
gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, texture, level);↩
fbos.push(fbo);↩
↩
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Any level of a texture can be attached to a framebuffer object.");↩
}↩
↩
for (let level = 0; level <= maxLevel; level++) {↩
gl.bindFramebuffer(gl.FRAMEBUFFER, fbos[level]);↩
shouldBe("gl.checkFramebufferStatus(gl.FRAMEBUFFER)", "gl.FRAMEBUFFER_COMPLETE");↩
gl.clearColor(colors[level][0] / 255, colors[level][1] / 255, colors[level][2] / 255, colors[level][3] / 255);↩
gl.clear(gl.COLOR_BUFFER_BIT);↩
}↩
↩
gl.bindFramebuffer(gl.FRAMEBUFFER, null);↩
↩
let program = wtu.setupTexturedQuad(gl);↩
↩
for (let level = 0; level <= maxLevel; level++) {↩
let size = Math.pow(2, maxLevel - level);↩
// We use differrent viewport sizes to affect which miplevel is fetched from the texture.↩
gl.viewport(0, 0, size, size);↩
gl.drawArrays(gl.TRIANGLES, 0, 6);↩
wtu.checkCanvasRect(gl, 0, 0, 1, 1, colors[level]);↩
}↩
↩
})();↩
↩
debug("");↩
var successfullyParsed = true;↩
</script>↩
<script src="../../js/js-test-post.js"></script>↩
↩
</body>↩
</html>↩
<!--↩
Copyright (c) 2019 The Khronos Group Inc.↩
Use of this source code is governed by an MIT-style license that can be↩
found in the LICENSE.txt file.↩
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