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diff --git a/dom/canvas/test/webgl-conf/checkout/deqp/functional/gles3/es3fClippingTests.js b/dom/canvas/test/webgl-conf/checkout/deqp/functional/gles3/es3fClippingTests.js
new file mode 100644
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+++ b/dom/canvas/test/webgl-conf/checkout/deqp/functional/gles3/es3fClippingTests.js
@@ -0,0 +1,406 @@
+/*-------------------------------------------------------------------------
+ * drawElements Quality Program OpenGL ES Utilities
+ * ------------------------------------------------
+ *
+ * Copyright 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the 'License');
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an 'AS IS' BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+'use strict';
+goog.provide('functional.gles3.es3fClippingTests');
+goog.require('framework.common.tcuImageCompare');
+goog.require('framework.common.tcuRGBA');
+goog.require('framework.common.tcuTestCase');
+goog.require('framework.delibs.debase.deMath');
+goog.require('framework.delibs.debase.deRandom');
+goog.require('framework.opengl.gluShaderUtil');
+goog.require('framework.referencerenderer.rrUtil');
+goog.require('functional.gles3.es3fFboTestCase');
+goog.require('functional.gles3.es3fFboTestUtil');
+
+goog.scope(function() {
+var es3fClippingTests = functional.gles3.es3fClippingTests;
+var tcuImageCompare = framework.common.tcuImageCompare;
+var tcuTestCase = framework.common.tcuTestCase;
+var es3fFboTestCase = functional.gles3.es3fFboTestCase;
+var es3fFboTestUtil = functional.gles3.es3fFboTestUtil;
+var rrUtil = framework.referencerenderer.rrUtil;
+var gluShaderUtil = framework.opengl.gluShaderUtil;
+var deRandom = framework.delibs.debase.deRandom;
+var deMath = framework.delibs.debase.deMath;
+var tcuRGBA = framework.common.tcuRGBA;
+
+/** @type {WebGL2RenderingContext} */ var gl;
+
+var setParentClass = function(child, parent) {
+    child.prototype = Object.create(parent.prototype);
+    child.prototype.constructor = child;
+};
+
+/**
+ * @constructor
+ * @extends {es3fFboTestCase.FboTestCase}
+ * @param {string} name
+ * @param {string} desc
+ * @param {Array<number>} viewport
+ * @param {Array<number>} rangeX
+ * @param {Array<number>} rangeY
+ * @param {Array<number>} rangeZ
+ */
+es3fClippingTests.TriangleCase = function(name, desc, viewport, rangeX, rangeY, rangeZ) {
+    es3fFboTestCase.FboTestCase.call(this, name, desc);
+    this.m_viewport = viewport;
+    this.m_rangeX = rangeX;
+    this.m_rangeY = rangeY;
+    this.m_rangeZ = rangeZ;
+};
+
+setParentClass(es3fClippingTests.TriangleCase, es3fFboTestCase.FboTestCase);
+
+es3fClippingTests.TriangleCase.prototype.render = function(dst) {
+        var ctx = this.getCurrentContext();
+        var x = this.m_viewport[0];
+        var y = this.m_viewport[1];
+        var width = this.m_viewport[2];
+        var height = this.m_viewport[3];
+        ctx.viewport(x, y, width, height);
+        ctx.clearColor(0, 0, 0, 1);
+        ctx.clear(gl.COLOR_BUFFER_BIT);
+
+        var shader = new es3fFboTestUtil.GradientShader(gluShaderUtil.DataType.FLOAT_VEC4);
+        var program = ctx.createProgram(shader);
+        shader.setGradient(ctx, program, [0, 0, 0, 0], [1, 1, 1, 1]);
+
+        rrUtil.drawQuad(ctx, program,
+            [this.m_rangeX[0], this.m_rangeY[0], this.m_rangeZ[0]],
+            [this.m_rangeX[1], this.m_rangeY[1], this.m_rangeZ[1]]);
+        dst.readViewport(ctx, this.m_viewport);
+};
+
+/**
+ * Move the vertex coordinate to pixel center
+ */
+var center = function(x, width) {
+    var half = width / 2;
+    var pos = half + x * half;
+    // almost to the center to avoid problems when rounding
+    // the position the pixel edge
+    pos = Math.round(pos) + 0.49;
+    return (pos - half) / half;
+};
+
+/**
+ * @constructor
+ * @extends {es3fFboTestCase.FboTestCase}
+ * @param {string} name
+ * @param {string} desc
+ * @param {Array<number>} viewport
+ * @param {number} lineWidth
+ */
+es3fClippingTests.LinesCase = function(name, desc, viewport, lineWidth) {
+    es3fFboTestCase.FboTestCase.call(this, name, desc);
+    this.m_viewport = viewport;
+    this.m_lineWidth = lineWidth;
+};
+
+setParentClass(es3fClippingTests.LinesCase, es3fFboTestCase.FboTestCase);
+
+es3fClippingTests.LinesCase.prototype.compare = function(reference, result) {
+    return tcuImageCompare.bilinearCompare('Result', 'Image comparison result',
+        reference.getAccess(),
+        result.getAccess(),
+        tcuRGBA.newRGBAComponents(3, 3, 3, 3));
+};
+
+es3fClippingTests.LinesCase.prototype.render = function(dst) {
+        var ctx = this.getCurrentContext();
+        var x = this.m_viewport[0];
+        var y = this.m_viewport[1];
+        var width = this.m_viewport[2];
+        var height = this.m_viewport[3];
+        ctx.viewport(x, y, width, height);
+        ctx.clearColor(0, 0, 0, 1);
+        ctx.clear(gl.COLOR_BUFFER_BIT);
+
+        var shader = new es3fFboTestUtil.GradientShader(gluShaderUtil.DataType.FLOAT_VEC4);
+        var program = ctx.createProgram(shader);
+        shader.setGradient(ctx, program, [0, 0, 0, 0], [1, 1, 1, 1]);
+
+        // positions
+        var posLoc = ctx.getAttribLocation(program, 'a_position');
+        if (posLoc == -1)
+            throw new Error('a_position attribute is not defined.');
+
+        var buffer = ctx.createBuffer();
+        ctx.bindBuffer(gl.ARRAY_BUFFER, buffer);
+
+        ctx.lineWidth(this.m_lineWidth);
+
+        var y1 = center(-0.5, height);
+        var y2 = center(-0.2, height);
+        var y3 = center(0.2, height);
+        var y4 = center(0.5, height);
+        var y5 = center(0, height);
+        var x1 = center(-0.5, width);
+        var x2 = center(-0.2, width);
+        var x3 = center(0.2, width);
+        var x4 = center(0.5, width);
+        var positions = [
+            // horizontal check
+            // both ends outside viewport
+            -1 - 1 / width, y1, 0, 1,
+            1 + 1 / width, y1, 0, 1,
+            // one end inside viewport
+            -1 + 1 / width, y2, 0, 1,
+            1 + 1 / width, y2, 0, 1,
+
+            -1 - 1 / width, y3, 0, 1,
+            1 - 1 / width, y3, 0, 1,
+            // both ends inside viewport
+
+            -1 + 1 / width, y4, 0, 1,
+            1 - 1 / width, y4, 0, 1,
+
+            //vertical check
+            // both ends outside viewport
+            x1, -1 - 1 / height, 0, 1,
+            x1, 1 + 1 / height, 0, 1,
+
+            // one end inside viewport
+            x2, -1 + 1 / height, 0, 1,
+            x2, 1 + 1 / height, 0, 1,
+
+            x3, -1 - 1 / height, 0, 1,
+            x3, 1 - 1 / height, 0, 1,
+            //both ends inside viewport
+            x4, -1 + 1 / height, 0, 1,
+            x4, 1 - 1 / height, 0, 1,
+
+            //depth check
+            -1, y5, -1.5, 1,
+            1, y5, 1.1, 1
+        ];
+        var numVertices = positions.length / 4;
+
+        ctx.bufferData(gl.ARRAY_BUFFER, new Float32Array(positions), gl.STATIC_DRAW);
+
+        ctx.enableVertexAttribArray(posLoc);
+        ctx.vertexAttribPointer(posLoc, 4, gl.FLOAT, false, 0, 0);
+
+        //colors
+        var coordLoc = ctx.getAttribLocation(program, 'a_coord');
+        if (coordLoc == -1)
+            throw new Error('a_coord attribute is not defined.');
+
+        var buffer2 = ctx.createBuffer();
+        ctx.bindBuffer(gl.ARRAY_BUFFER, buffer2);
+
+        var coords = [];
+        for (var i = 0; i < numVertices / 2; i++) {
+            coords.push(0, 0, 1, 1);
+        }
+        ctx.bufferData(gl.ARRAY_BUFFER, new Float32Array(coords), gl.STATIC_DRAW);
+
+        ctx.enableVertexAttribArray(coordLoc);
+        ctx.vertexAttribPointer(coordLoc, 2, gl.FLOAT, false, 0, 0);
+
+        ctx.drawArrays(gl.LINES, 0, numVertices);
+        ctx.disableVertexAttribArray(posLoc);
+        ctx.disableVertexAttribArray(coordLoc);
+        ctx.bindBuffer(gl.ARRAY_BUFFER, null);
+        ctx.deleteBuffer(buffer);
+        ctx.deleteBuffer(buffer2);
+        dst.readViewport(ctx, this.m_viewport);
+};
+
+/**
+ * @constructor
+ * @extends {es3fFboTestCase.FboTestCase}
+ * @param {string} name
+ * @param {string} desc
+ * @param {Array<number>} viewport
+ * @param {number} pointSize
+ */
+es3fClippingTests.PointsCase = function(name, desc, viewport, pointSize) {
+    es3fFboTestCase.FboTestCase.call(this, name, desc);
+    this.m_viewport = viewport;
+    this.m_pointSize = pointSize;
+};
+
+setParentClass(es3fClippingTests.PointsCase, es3fFboTestCase.FboTestCase);
+
+es3fClippingTests.PointsCase.prototype.compare = function(reference, result) {
+    return tcuImageCompare.bilinearCompare('Result', 'Image comparison result',
+        reference.getAccess(),
+        result.getAccess(),
+        tcuRGBA.newRGBAComponents(3, 3, 3, 3));
+};
+
+es3fClippingTests.PointsCase.prototype.render = function(dst) {
+        var ctx = this.getCurrentContext();
+        var x = this.m_viewport[0];
+        var y = this.m_viewport[1];
+        var width = this.m_viewport[2];
+        var height = this.m_viewport[3];
+        ctx.viewport(x, y, width, height);
+        ctx.clearColor(0, 0, 0, 1);
+        ctx.clear(gl.COLOR_BUFFER_BIT);
+
+        var shader = new es3fFboTestUtil.FlatColorShader(gluShaderUtil.DataType.FLOAT_VEC4, this.m_pointSize);
+        var program = ctx.createProgram(shader);
+        shader.setColor(ctx, program, [0, 1, 0, 1]);
+
+        // positions
+        var posLoc = ctx.getAttribLocation(program, 'a_position');
+        if (posLoc == -1)
+            throw new Error('a_position attribute is not defined.');
+
+        var buffer = ctx.createBuffer();
+        ctx.bindBuffer(gl.ARRAY_BUFFER, buffer);
+
+        var positions = [
+            // clipping in X axis
+            -1 - 1 / width, -0.5, 0, 1,
+            -1, 0, 0, 1,
+            -1 + 1 / width, 0.5, 0, 1,
+            1 + 1 / width, -0.5, 0, 1,
+            1, 0, 0, 1,
+            1 - 1 / width, 0.5, 0, 1,
+            // clipping in Y axis
+            -0.5, -1 - 1 / height, 0, 1,
+            0, -1, 0, 1,
+            0.5, -1 + 1 / height, 0, 1,
+            -0.5, 1 - 1 / height, 0, 1,
+            0, 1, 0, 1,
+            0.5, 1 + 1 / height, 0, 1,
+            // clipping in Z axis
+            -0.5, -0.5, -1.5, 1,
+            0, 0, 0, 1,
+            0.5, 0.5, 1.5, 1
+        ];
+        // move the vertices to pixel centers to avoid off-by-1 differences
+        for (var i = 0; i < positions.length; i += 4) {
+            positions[i + 0] = center(positions[i + 0], width);
+            positions[i + 1] = center(positions[i + 1], height);
+        }
+        // positions = [-1 + 3/width + 0.001, 1 + 1/height + 0.001, 0, 1];
+        // positions = [-1, -1, 0, 1];
+
+        var numVertices = positions.length / 4;
+
+        ctx.bufferData(gl.ARRAY_BUFFER, new Float32Array(positions), gl.STATIC_DRAW);
+
+        ctx.enableVertexAttribArray(posLoc);
+        ctx.vertexAttribPointer(posLoc, 4, gl.FLOAT, false, 0, 0);
+
+        ctx.drawArrays(gl.POINTS, 0, numVertices);
+        ctx.disableVertexAttribArray(posLoc);
+        ctx.bindBuffer(gl.ARRAY_BUFFER, null);
+        ctx.deleteBuffer(buffer);
+        dst.readViewport(ctx, this.m_viewport);
+};
+
+/**
+ * @constructor
+ * @extends {tcuTestCase.DeqpTest}
+ */
+es3fClippingTests.ClippingTests = function() {
+    tcuTestCase.DeqpTest.call(this, 'clipping', 'Clipping tests');
+};
+
+es3fClippingTests.ClippingTests.prototype = Object.create(tcuTestCase.DeqpTest.prototype);
+es3fClippingTests.ClippingTests.prototype.constructor = es3fClippingTests.ClippingTests;
+
+es3fClippingTests.ClippingTests.prototype.init = function() {
+    var width = gl.drawingBufferWidth;
+    var height = gl.drawingBufferHeight;
+    /** @const */ var WIDE_POINT = 5;
+    /** @const */ var WIDE_LINE = 5;
+    var viewports = [{ name: 'full_viewport', v: [0, 0, width, height] }, {
+                       name: 'partial_viewport', v: [width * 0.3 , height * 0.2 , width * 0.6, height * 0.5] }
+    ];
+    var pointSizeRange = gl.getParameter(gl.ALIASED_POINT_SIZE_RANGE);
+    var lineWidthRange = gl.getParameter(gl.ALIASED_LINE_WIDTH_RANGE);
+
+    for (var i = 0; i < viewports.length; i++) {
+        var v = viewports[i].v.map(Math.floor);
+        var vName = viewports[i].name;
+        this.addChild(new es3fClippingTests.LinesCase('narrow_lines_' + vName, 'lines', v, 1));
+        if (lineWidthRange[1] >= WIDE_LINE)
+            this.addChild(new es3fClippingTests.LinesCase('wide_lines_' + vName, 'lines', v, WIDE_LINE));
+        this.addChild(new es3fClippingTests.PointsCase('small_points_' + vName, 'points', v, 1));
+        if (pointSizeRange[1] >= WIDE_POINT)
+            this.addChild(new es3fClippingTests.PointsCase('wide_points_' + vName, 'points', v, WIDE_POINT));
+    }
+
+    var rangesX = [
+        [-1.2, 1.2],
+        [-1.2, 0.8],
+        [-0.8, 1.2]
+    ];
+    var rangesY = [
+        [-1.2, 1.2],
+        [-1.2, 0.8],
+        [-0.8, 1.2]
+    ];
+    var rangesZ = [
+        [-1.2, 1.2],
+        [1.2, -1.2]
+    ];
+    for (var i = 0; i < viewports.length; i++) {
+        var v = viewports[i].v.map(Math.floor);
+        var vName = viewports[i].name;
+        for (var x = 0; x < rangesX.length; x++)
+        for (var y = 0; y < rangesY.length; y++)
+        for (var z = 0; z < rangesZ.length; z++) {
+            var rangeX = rangesX[x];
+            var rangeY = rangesY[y];
+            var rangeZ = rangesZ[z];
+            var name = 'triangles_' + viewports[i].name + '_' +
+                        '(' + rangeX[0] + ',' + rangeY[0] + ',' + rangeZ[0] + ')-' +
+                        '(' + rangeX[1] + ',' + rangeY[1] + ',' + rangeZ[1] + ')';
+            this.addChild(new es3fClippingTests.TriangleCase(name, 'triangles', v,
+                            rangeX,
+                            rangeY,
+                            rangeZ));
+        }
+    }
+};
+
+/**
+ * Run test
+ * @param {WebGL2RenderingContext} context
+ */
+es3fClippingTests.run = function(context) {
+    gl = context;
+    //Set up Test Root parameters
+    var state = tcuTestCase.runner;
+    state.setRoot(new es3fClippingTests.ClippingTests());
+
+    //Set up name and description of this test series.
+    setCurrentTestName(state.testCases.fullName());
+    description(state.testCases.getDescription());
+
+    try {
+        //Run test cases
+        tcuTestCase.runTestCases();
+    }
+    catch (err) {
+        testFailedOptions('Failed to es3fClippingTests.run tests', false);
+        tcuTestCase.runner.terminate();
+    }
+};
+
+});