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-rw-r--r--dom/canvas/test/webgl-conf/checkout/js/tests/clipping-wide-points.js92
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diff --git a/dom/canvas/test/webgl-conf/checkout/js/tests/clipping-wide-points.js b/dom/canvas/test/webgl-conf/checkout/js/tests/clipping-wide-points.js
new file mode 100644
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+++ b/dom/canvas/test/webgl-conf/checkout/js/tests/clipping-wide-points.js
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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.
+*/
+
+'use strict';
+description("This test ensures clipping works with wide points whose centers are out of the viewport");
+
+var wtu = WebGLTestUtils;
+var gl = wtu.create3DContext("testbed", undefined, contextVersion);
+
+var pointSize;
+
+function setupProgram() {
+ var vs = "attribute vec4 pos;" +
+ "uniform float pointSize; " +
+ "void main() {" +
+ " gl_PointSize = pointSize;" +
+ " gl_Position = pos;" +
+ "}";
+ var fs = "precision mediump float;" +
+ "void main() {" +
+ " gl_FragColor = vec4(0.0, 1.0, 0.0, 1.0);" +
+ "}";
+ var program = wtu.setupProgram(gl, [vs, fs], ['pos']);
+ if (program) {
+ var loc = gl.getUniformLocation(program, 'pointSize');
+ gl.uniform1f(loc, pointSize);
+ gl.vertexAttribPointer(0, 4, gl.FLOAT, false, 0, 0);
+ gl.enableVertexAttribArray(0);
+ wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Should be no errors after setting up program");
+ }
+ return program;
+}
+
+function runOneTestCase(vertex) {
+ debug("");
+ debug("testing point at (" + vertex[0] + ", " + vertex[1] + ", " + vertex[2] + ")");
+ var data = new Float32Array(vertex);
+ gl.bufferSubData(gl.ARRAY_BUFFER, 0, data);
+
+ gl.clear(gl.COLOR_BUFFER_BIT);
+ gl.drawArrays(gl.POINTS, 0, 1);
+ wtu.checkCanvasRect(gl, 0, 0, 1, 1, [0, 255, 0]);
+ wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Should be no errors after running one test case");
+}
+
+function runTests() {
+ if (!gl) {
+ testFailed("context does not exist");
+ return;
+ }
+
+ var range = gl.getParameter(gl.ALIASED_POINT_SIZE_RANGE);
+ if (range[1] < 2.0) {
+ testPassed("ALIASDED_POINT_SIZE_RANGE less than 2");
+ return;
+ }
+ pointSize = 2.0;
+
+ var data = new Float32Array(4);
+ var buffer = gl.createBuffer();
+ gl.bindBuffer(gl.ARRAY_BUFFER, buffer);
+ gl.bufferData(gl.ARRAY_BUFFER, data, gl.STATIC_DRAW);
+
+ var program = setupProgram();
+ if (!program) {
+ testFailed("fail to set up program");
+ return;
+ }
+
+ gl.disable(gl.BLEND);
+ gl.disable(gl.DITHER);
+ gl.disable(gl.DEPTH_TEST);
+
+ gl.clearColor(1.0, 0.0, 0.0, 1.0);
+
+ var vertices = [
+ [ 0.99, 0.5, 0.0, 1.0 ],
+ [ 1.01, 0.5, 0.0, 1.0 ],
+ [ 0.5, 0.99, 0.0, 1.0 ],
+ [ 0.5, 1.01, 0.0, 1.0 ],
+ ];
+ for (var idx = 0; idx < vertices.length; ++idx) {
+ runOneTestCase(vertices[idx]);
+ }
+}
+
+runTests();
+debug("");
+var successfullyParsed = true;