cube-incomplete-fbo.html

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Copyright (c) 2019 The Khronos Group Inc.

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<!DOCTYPE html>

<html>

<head>

<meta charset="utf-8">

<title>Test that cube incomplete textures can not be used as FBO attachments</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="example" width="24" height="24"></canvas>

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

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

<script>

"use strict";

var wtu = WebGLTestUtils;

description();

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

var testIncompleteCubemapFaceInFBO = function() {

    // Create a cube map texture that's not cube complete.

    var tex2 = gl.createTexture();

    gl.bindTexture(gl.TEXTURE_CUBE_MAP, tex2);

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

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

    var cube_map_faces = [

        gl.TEXTURE_CUBE_MAP_POSITIVE_X,

        gl.TEXTURE_CUBE_MAP_NEGATIVE_X,

        gl.TEXTURE_CUBE_MAP_POSITIVE_Y,

        gl.TEXTURE_CUBE_MAP_NEGATIVE_Y,

        gl.TEXTURE_CUBE_MAP_POSITIVE_Z,

        gl.TEXTURE_CUBE_MAP_NEGATIVE_Z

];

    // Fill in all but 1 cube map face

    for (var i = 0; i < cube_map_faces.length - 1; ++i) {

        gl.texImage2D(cube_map_faces[i], 0, gl.RGBA, 32, 32, 0, gl.RGBA, gl.UNSIGNED_BYTE, null);

    var fb2 = gl.createFramebuffer();

    gl.bindFramebuffer(gl.FRAMEBUFFER, fb2);

    gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_CUBE_MAP_POSITIVE_X, tex2, 0);

    wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Should be no errors after attaching cube map face.");

    debug("Cubemap has 1 missing face, so framebuffer should not be complete.");

    shouldBe("gl.checkFramebufferStatus(gl.FRAMEBUFFER)", "gl.FRAMEBUFFER_INCOMPLETE_ATTACHMENT");

    debug("");

    // Fill in missing cube map face

    gl.texImage2D(cube_map_faces[5], 0, gl.RGBA, 32, 32, 0, gl.RGBA, gl.UNSIGNED_BYTE, null);

    debug("Missing face is added, so framebuffer should become complete.");

    shouldBe("gl.checkFramebufferStatus(gl.FRAMEBUFFER)", "gl.FRAMEBUFFER_COMPLETE");

testIncompleteCubemapFaceInFBO();

var successfullyParsed = true;

finishTest();

</script>

</body>

</html>