molstar
Version:
A comprehensive macromolecular library.
68 lines (67 loc) • 2.42 kB
JavaScript
;
/**
* Copyright (c) 2018-2023 mol* contributors, licensed under MIT, See LICENSE file for more info.
*
* @author Alexander Rose <alexander.rose@weirdbyte.de>
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.createVertexArray = createVertexArray;
const id_factory_1 = require("../../mol-util/id-factory");
const getNextVertexArrayId = (0, id_factory_1.idFactory)();
function getVertexArray(extensions) {
const { vertexArrayObject } = extensions;
if (!vertexArrayObject) {
throw new Error('VertexArrayObject not supported');
}
const vertexArray = vertexArrayObject.createVertexArray();
if (!vertexArray) {
throw new Error('Could not create WebGL vertex array');
}
return vertexArray;
}
function getVertexArrayObject(extensions) {
const { vertexArrayObject } = extensions;
if (vertexArrayObject === null) {
throw new Error('VertexArrayObject not supported');
}
return vertexArrayObject;
}
function createVertexArray(gl, extensions, program, attributeBuffers, elementsBuffer) {
const id = getNextVertexArrayId();
let vertexArray = getVertexArray(extensions);
let vertexArrayObject = getVertexArrayObject(extensions);
function update() {
vertexArrayObject.bindVertexArray(vertexArray);
if (elementsBuffer)
elementsBuffer.bind();
program.bindAttributes(attributeBuffers);
vertexArrayObject.bindVertexArray(null);
}
update();
let destroyed = false;
return {
id,
bind: () => {
vertexArrayObject.bindVertexArray(vertexArray);
},
update,
reset: () => {
vertexArray = getVertexArray(extensions);
vertexArrayObject = getVertexArrayObject(extensions);
update();
},
destroy: () => {
if (destroyed)
return;
if (elementsBuffer) {
// workaround for ANGLE/Chromium bug
// - https://bugs.chromium.org/p/angleproject/issues/detail?id=6599
// - https://bugs.chromium.org/p/chromium/issues/detail?id=1272238
vertexArrayObject.bindVertexArray(vertexArray);
gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, null);
}
vertexArrayObject.deleteVertexArray(vertexArray);
destroyed = true;
}
};
}