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createContext.js
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createContext.js
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import { clone } from "../Source/Cesium.js";
import { defaultValue } from "../Source/Cesium.js";
import { Context } from "../Source/Cesium.js";
import createCanvas from "./createCanvas.js";
import createFrameState from "./createFrameState.js";
import getWebGLStub from "./getWebGLStub.js";
function createContext(options, canvasWidth, canvasHeight) {
// clone options so we can change properties
options = clone(defaultValue(options, {}));
options.webgl = clone(defaultValue(options.webgl, {}));
options.webgl.antialias = defaultValue(options.webgl.antialias, false);
if (!!window.webglStub) {
options.getWebGLStub = getWebGLStub;
}
const canvas = createCanvas(canvasWidth, canvasHeight);
const context = new Context(canvas, options);
if (!!window.webglValidation) {
context.validateShaderProgram = true;
context.validateFramebuffer = true;
context.logShaderCompilation = true;
context.throwOnWebGLError = true;
}
const us = context.uniformState;
us.update(createFrameState(context));
// Add function for test
context.destroyForSpecs = function () {
document.body.removeChild(context.canvas);
return context.destroy();
};
return context;
}
export default createContext;