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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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<head>
<meta charset="utf-8">
<title>WebGL GLES2 difference test.</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>
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<body>
<div id="description"></div>
<div id="console"></div>
<script>
"use strict";
var wtu = WebGLTestUtils;
description("Tests the few differences between WebGL and GLES2");
var gl = wtu.create3DContext();
var program = wtu.loadStandardProgram(gl);
gl.useProgram(program);
var vertexObject = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, vertexObject);
gl.enableVertexAttribArray(0);
gl.vertexAttribPointer(0, 4, gl.FLOAT, false, 0, 0);
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Setup should succeed");
debug("");
debug("Verify that constant color and constant alpha cannot be used together as source and destination factors in the blend function");
wtu.shouldGenerateGLError(gl, gl.INVALID_OPERATION, "gl.blendFunc(gl.CONSTANT_COLOR, gl.CONSTANT_ALPHA)");
wtu.shouldGenerateGLError(gl, gl.INVALID_OPERATION, "gl.blendFunc(gl.ONE_MINUS_CONSTANT_COLOR, gl.CONSTANT_ALPHA)");
wtu.shouldGenerateGLError(gl, gl.INVALID_OPERATION, "gl.blendFunc(gl.CONSTANT_COLOR, gl.ONE_MINUS_CONSTANT_ALPHA)");
wtu.shouldGenerateGLError(gl, gl.INVALID_OPERATION, "gl.blendFunc(gl.ONE_MINUS_CONSTANT_COLOR, gl.ONE_MINUS_CONSTANT_ALPHA)");
wtu.shouldGenerateGLError(gl, gl.INVALID_OPERATION, "gl.blendFunc(gl.CONSTANT_ALPHA, gl.CONSTANT_COLOR)");
wtu.shouldGenerateGLError(gl, gl.INVALID_OPERATION, "gl.blendFunc(gl.CONSTANT_ALPHA, gl.ONE_MINUS_CONSTANT_COLOR)");
wtu.shouldGenerateGLError(gl, gl.INVALID_OPERATION, "gl.blendFunc(gl.ONE_MINUS_CONSTANT_ALPHA, gl.CONSTANT_COLOR)");
wtu.shouldGenerateGLError(gl, gl.INVALID_OPERATION, "gl.blendFunc(gl.ONE_MINUS_CONSTANT_ALPHA, gl.ONE_MINUS_CONSTANT_COLOR)");
wtu.shouldGenerateGLError(gl, gl.INVALID_OPERATION, "gl.blendFuncSeparate(gl.CONSTANT_COLOR, gl.CONSTANT_ALPHA, gl.ONE, gl.ZERO)");
wtu.shouldGenerateGLError(gl, gl.INVALID_OPERATION, "gl.blendFuncSeparate(gl.ONE_MINUS_CONSTANT_COLOR, gl.CONSTANT_ALPHA, gl.ONE, gl.ZERO)");
wtu.shouldGenerateGLError(gl, gl.INVALID_OPERATION, "gl.blendFuncSeparate(gl.CONSTANT_COLOR, gl.ONE_MINUS_CONSTANT_ALPHA, gl.ONE, gl.ZERO)");
wtu.shouldGenerateGLError(gl, gl.INVALID_OPERATION, "gl.blendFuncSeparate(gl.ONE_MINUS_CONSTANT_COLOR, gl.ONE_MINUS_CONSTANT_ALPHA, gl.ONE, gl.ZERO)");
wtu.shouldGenerateGLError(gl, gl.INVALID_OPERATION, "gl.blendFuncSeparate(gl.CONSTANT_ALPHA, gl.CONSTANT_COLOR, gl.ONE, gl.ZERO)");
wtu.shouldGenerateGLError(gl, gl.INVALID_OPERATION, "gl.blendFuncSeparate(gl.CONSTANT_ALPHA, gl.ONE_MINUS_CONSTANT_COLOR, gl.ONE, gl.ZERO)");
wtu.shouldGenerateGLError(gl, gl.INVALID_OPERATION, "gl.blendFuncSeparate(gl.ONE_MINUS_CONSTANT_ALPHA, gl.CONSTANT_COLOR, gl.ONE, gl.ZERO)");
wtu.shouldGenerateGLError(gl, gl.INVALID_OPERATION, "gl.blendFuncSeparate(gl.ONE_MINUS_CONSTANT_ALPHA, gl.ONE_MINUS_CONSTANT_COLOR, gl.ONE, gl.ZERO)");
debug("");
debug("Verify that in depthRange zNear <= zFar");
wtu.shouldGenerateGLError(gl, gl.INVALID_OPERATION, "gl.depthRange(20, 10)");
debug("");
debug("Verify that *LENGTH are undefined");
shouldBeUndefined(gl.INFO_LOG_LENGTH);
shouldBeUndefined(gl.SHADER_SOURCE_LENGTH);
shouldBeUndefined(gl.ACTIVE_UNIFORM_MAX_LENGTH);
shouldBeUndefined(gl.ACTIVE_ATTRIB_MAX_LENGTH);
shouldBeUndefined(gl.ACTIVE_ATTRIBUTE_MAX_LENGTH);
debug("");
debug("Verify that UNPACK_COLORSPACE_CONVERSION_WEBGL is supported");
shouldBe("gl.getParameter(gl.UNPACK_COLORSPACE_CONVERSION_WEBGL)", "gl.BROWSER_DEFAULT_WEBGL");
gl.pixelStorei(gl.UNPACK_COLORSPACE_CONVERSION_WEBGL, gl.NONE);
shouldBe("gl.getParameter(gl.UNPACK_COLORSPACE_CONVERSION_WEBGL)", "gl.NONE");
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "set/get UNPACK_COLORSPACE_CONVERSION_WEBGL should generate no error");
debug("");
debug("Verify that drawingBufferWidth and drawingBufferHeights are implemented");
shouldBeTrue("gl.drawingBufferWidth >= 0 && gl.drawingBufferHeight >= 0");
debug("");
debug("Verify that bindAttribLocation rejects names start with webgl_ or _webgl_");
wtu.shouldGenerateGLError(gl, gl.INVALID_OPERATION, "gl.bindAttribLocation(program, 0, 'webgl_a')");
wtu.shouldGenerateGLError(gl, gl.INVALID_OPERATION, "gl.bindAttribLocation(program, 0, '_webgl_a')");
debug("");
debug("Verify that NaN line width is not accepted");
wtu.shouldGenerateGLError(gl, gl.INVALID_VALUE, "gl.lineWidth(NaN)");
var successfullyParsed = true;
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