| /* |
| 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; |