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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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