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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<!--
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.
-->
<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>
"use strict";
var wtu = WebGLTestUtils;
var canvas;
var gl;
var shouldGenerateGLError;
var WEBGL_lose_context;
var new_WEBGL_lose_context;
var bufferObjects;
var program;
var texture;
var texColor = [255, 10, 20, 255];
var allowRestore;
var contextLostEventFired;
var contextRestoredEventFired;
var OES_vertex_array_object;
var old_OES_vertex_array_object;
var vertexArrayObject;
var OES_texture_float;
var newExtension;
function init()
{
enableJSTestPreVerboseLogging();
description("Tests behavior under a restored context.");
shouldGenerateGLError = wtu.shouldGenerateGLError;
testLosingContext();
}
function setupTest()
{
canvas = document.createElement("canvas");
canvas.width = 1;
canvas.height = 1;
gl = wtu.create3DContext(canvas);
WEBGL_lose_context = getExtensionAndAddProperty(gl, "WEBGL_lose_context");
if (!WEBGL_lose_context) {
debug("Could not find WEBGL_lose_context extension");
return false;
}
// Try to get a few extensions
OES_vertex_array_object = getExtensionAndAddProperty(gl, "OES_vertex_array_object");
OES_texture_float = getExtensionAndAddProperty(gl, "OES_texture_float");
return true;
}
function getExtensionAndAddProperty(gl, name) {
var ext = wtu.getExtensionWithKnownPrefixes(gl, name);
if (ext) {
ext.webglTestProperty = true;
}
return ext;
}
function reGetExtensionAndTestForProperty(gl, name, expectProperty) {
newExtension = wtu.getExtensionWithKnownPrefixes(gl, name);
// NOTE: while getting a extension after context lost/restored is allowed to fail
// for the purpose the conformance tests it is not.
//
// Hypothetically the user can switch GPUs live. For example on Windows, install 2 GPUs,
// then in the control panen enable 1, disable the others and visa versa. Since the GPUs
// have different capabilities one or the other may not support a particlar extension.
//
// But, for the purpose of the conformance tests the context is expected to restore
// on the same GPU and therefore the extensions that succeeded previously should
// succeed on restore.
shouldBeTrue("newExtension != null");
if (expectProperty) {
shouldBeTrue("newExtension.webglTestProperty === true");
} else {
shouldBeTrue("newExtension.webglTestProperty === undefined");
}
return newExtension;
}
function testLosingContext()
{
if (!setupTest()) {
finishTest();
return;
}
debug("Test losing a context and inability to restore it.");
canvas.addEventListener("webglcontextlost", function(e) {
testLostContext(e);
// restore the context after this event has exited.
setTimeout(function() {
// we didn't call prevent default so we should not be able to restore the context
shouldGenerateGLError(gl, gl.INVALID_OPERATION, "WEBGL_lose_context.restoreContext()");
testLosingAndRestoringContext();
}, 0);
});
canvas.addEventListener("webglcontextrestored", testShouldNotRestoreContext);
allowRestore = false;
contextLostEventFired = false;
contextRestoredEventFired = false;
testOriginalContext();
WEBGL_lose_context.loseContext();
// The context should be lost immediately.
shouldBeTrue("gl.isContextLost()");
shouldBe("gl.getError()", "gl.CONTEXT_LOST_WEBGL");
shouldBe("gl.getError()", "gl.NO_ERROR");
// gl methods should be no-ops
shouldGenerateGLError(gl, gl.NO_ERROR, "gl.blendFunc(gl.TEXTURE_2D, gl.TEXTURE_CUBE_MAP)");
// but the event should not have been fired.
shouldBeFalse("contextLostEventFired");
}
function testLosingAndRestoringContext()
{
if (!setupTest())
finishTest();
debug("");
debug("Test losing and restoring a context.");
canvas.addEventListener("webglcontextlost", function(e) {
testLostContext(e);
// restore the context after this event has exited.
setTimeout(function() {
shouldGenerateGLError(gl, gl.NO_ERROR, "WEBGL_lose_context.restoreContext()");
// Calling restoreContext() twice should not cause error or crash
shouldGenerateGLError(gl, gl.NO_ERROR, "WEBGL_lose_context.restoreContext()");
// The context should still be lost. It will not get restored until the
// webglrestorecontext event is fired.
shouldBeTrue("gl.isContextLost()");
shouldBe("gl.getError()", "gl.NO_ERROR");
// gl methods should still be no-ops
shouldGenerateGLError(gl, gl.NO_ERROR, "gl.blendFunc(gl.TEXTURE_2D, gl.TEXTURE_CUBE_MAP)");
}, 0);
});
canvas.addEventListener("webglcontextrestored", function() {
testRestoredContext();
finishTest();
});
allowRestore = true;
contextLostEventFired = false;
contextRestoredEventFired = false;
testOriginalContext();
WEBGL_lose_context.loseContext();
// The context should be lost immediately.
shouldBeTrue("gl.isContextLost()");
shouldBe("gl.getError()", "gl.CONTEXT_LOST_WEBGL");
shouldBe("gl.getError()", "gl.NO_ERROR");
// gl methods should be no-ops
shouldGenerateGLError(gl, gl.NO_ERROR, "gl.blendFunc(gl.TEXTURE_2D, gl.TEXTURE_CUBE_MAP)");
// but the event should not have been fired.
shouldBeFalse("contextLostEventFired");
}
function testRendering()
{
gl.clearColor(0, 0, 0, 255);
gl.colorMask(1, 1, 1, 0);
gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
program = wtu.setupSimpleTextureProgram(gl);
bufferObjects = wtu.setupUnitQuad(gl);
texture = wtu.createColoredTexture(gl, canvas.width, canvas.height, texColor);
gl.uniform1i(gl.getUniformLocation(program, "tex"), 0);
wtu.clearAndDrawUnitQuad(gl, [0, 0, 0, 255]);
var compare = texColor.slice(0, 3);
wtu.checkCanvasRect(gl, 0, 0, canvas.width, canvas.height, compare, "shouldBe " + compare);
shouldBe("gl.getError()", "gl.NO_ERROR");
}
function testOriginalContext()
{
debug("Test valid context");
shouldBeFalse("gl.isContextLost()");
shouldBe("gl.getError()", "gl.NO_ERROR");
testRendering();
debug("");
}
function testLostContext(e)
{
debug("Test lost context");
shouldBeFalse("contextLostEventFired");
contextLostEventFired = true;
shouldBeTrue("gl.isContextLost()");
shouldBe("gl.getError()", "gl.NO_ERROR");
debug("");
if (allowRestore)
e.preventDefault();
}
function testShouldNotRestoreContext(e)
{
testFailed("Should not restore the context unless preventDefault is called on the context lost event");
debug("");
}
function testResources(expected)
{
var tests = [
"gl.bindTexture(gl.TEXTURE_2D, texture)",
"gl.useProgram(program)",
"gl.bindBuffer(gl.ARRAY_BUFFER, bufferObjects[0])",
];
for (var i = 0; i < tests.length; ++i)
shouldGenerateGLError(gl, expected, tests[i]);
}
function testOESTextureFloat() {
if (OES_texture_float) {
// Extension must still be lost.
var tex = gl.createTexture();
gl.bindTexture(gl.TEXTURE_2D, tex);
shouldGenerateGLError(gl, gl.INVALID_ENUM, "gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, 1, 1, 0, gl.RGBA, gl.FLOAT, null)");
// Try re-enabling extension
OES_texture_float = reGetExtensionAndTestForProperty(gl, "OES_texture_float", false);
shouldGenerateGLError(gl, gl.NO_ERROR, "gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, 1, 1, 0, gl.RGBA, gl.FLOAT, null)");
}
}
function testOESVertexArrayObject() {
if (OES_vertex_array_object) {
// Extension must still be lost.
shouldBeNull("OES_vertex_array_object.createVertexArrayOES()");
// Try re-enabling extension
old_OES_vertex_array_object = OES_vertex_array_object;
OES_vertex_array_object = reGetExtensionAndTestForProperty(gl, "OES_vertex_array_object", false);
shouldBeTrue("OES_vertex_array_object.createVertexArrayOES() != null");
shouldBeTrue("old_OES_vertex_array_object.createVertexArrayOES() == null");
}
}
function testExtensions() {
testOESTextureFloat();
testOESVertexArrayObject();
// Only the WEBGL_lose_context extension should be the same object after context lost.
new_WEBGL_lose_context = reGetExtensionAndTestForProperty(gl, "WEBGL_lose_context", true);
}
function testRestoredContext()
{
debug("Test restored context");
shouldBeFalse("contextRestoredEventFired");
contextRestoredEventFired = true;
shouldBeFalse("gl.isContextLost()");
shouldBe("gl.getError()", "gl.NO_ERROR");
// Validate that using old resources fails.
testResources(gl.INVALID_OPERATION);
testRendering();
// Validate new resources created in testRendering().
testResources(gl.NO_ERROR);
testExtensions();
debug("");
}
</script>
</head>
<body onload="init()">
<div id="description"></div>
<div id="console"></div>
</body>
</html>
|
