92 lines
2.6 KiB
JavaScript
92 lines
2.6 KiB
JavaScript
/*
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Copyright (c) 2019 The Khronos Group Inc.
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Use of this source code is governed by an MIT-style license that can be
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found in the LICENSE.txt file.
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*/
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'use strict';
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description("This test ensures clipping works with wide points whose centers are out of the viewport");
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var wtu = WebGLTestUtils;
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var gl = wtu.create3DContext("testbed", undefined, contextVersion);
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var pointSize;
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function setupProgram() {
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var vs = "attribute vec4 pos;" +
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"uniform float pointSize; " +
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"void main() {" +
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" gl_PointSize = pointSize;" +
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" gl_Position = pos;" +
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"}";
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var fs = "precision mediump float;" +
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"void main() {" +
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" gl_FragColor = vec4(0.0, 1.0, 0.0, 1.0);" +
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"}";
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var program = wtu.setupProgram(gl, [vs, fs], ['pos']);
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if (program) {
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var loc = gl.getUniformLocation(program, 'pointSize');
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gl.uniform1f(loc, pointSize);
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gl.vertexAttribPointer(0, 4, gl.FLOAT, false, 0, 0);
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gl.enableVertexAttribArray(0);
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wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Should be no errors after setting up program");
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}
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return program;
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}
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function runOneTestCase(vertex) {
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debug("");
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debug("testing point at (" + vertex[0] + ", " + vertex[1] + ", " + vertex[2] + ")");
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var data = new Float32Array(vertex);
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gl.bufferSubData(gl.ARRAY_BUFFER, 0, data);
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gl.clear(gl.COLOR_BUFFER_BIT);
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gl.drawArrays(gl.POINTS, 0, 1);
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wtu.checkCanvasRect(gl, 0, 0, 1, 1, [0, 255, 0]);
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wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Should be no errors after running one test case");
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}
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function runTests() {
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if (!gl) {
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testFailed("context does not exist");
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return;
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}
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var range = gl.getParameter(gl.ALIASED_POINT_SIZE_RANGE);
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if (range[1] < 2.0) {
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testPassed("ALIASDED_POINT_SIZE_RANGE less than 2");
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return;
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}
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pointSize = 2.0;
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var data = new Float32Array(4);
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var buffer = gl.createBuffer();
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gl.bindBuffer(gl.ARRAY_BUFFER, buffer);
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gl.bufferData(gl.ARRAY_BUFFER, data, gl.STATIC_DRAW);
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var program = setupProgram();
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if (!program) {
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testFailed("fail to set up program");
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return;
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}
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gl.disable(gl.BLEND);
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gl.disable(gl.DITHER);
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gl.disable(gl.DEPTH_TEST);
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gl.clearColor(1.0, 0.0, 0.0, 1.0);
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var vertices = [
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[ 0.99, 0.5, 0.0, 1.0 ],
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[ 1.01, 0.5, 0.0, 1.0 ],
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[ 0.5, 0.99, 0.0, 1.0 ],
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[ 0.5, 1.01, 0.0, 1.0 ],
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];
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for (var idx = 0; idx < vertices.length; ++idx) {
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runOneTestCase(vertices[idx]);
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}
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}
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runTests();
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debug("");
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var successfullyParsed = true;
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