109 lines
2.0 KiB
JavaScript
109 lines
2.0 KiB
JavaScript
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class WebGL {
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static isWebGLAvailable() {
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try {
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const canvas = document.createElement( 'canvas' );
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return !! ( window.WebGLRenderingContext && ( canvas.getContext( 'webgl' ) || canvas.getContext( 'experimental-webgl' ) ) );
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} catch ( e ) {
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return false;
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}
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}
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static isWebGL2Available() {
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try {
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const canvas = document.createElement( 'canvas' );
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return !! ( window.WebGL2RenderingContext && canvas.getContext( 'webgl2' ) );
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} catch ( e ) {
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return false;
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}
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}
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static isColorSpaceAvailable( colorSpace ) {
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try {
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const canvas = document.createElement( 'canvas' );
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const ctx = window.WebGL2RenderingContext && canvas.getContext( 'webgl2' );
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ctx.drawingBufferColorSpace = colorSpace;
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return ctx.drawingBufferColorSpace === colorSpace; // deepscan-disable-line SAME_OPERAND_VALUE
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} catch ( e ) {
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return false;
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}
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}
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static getWebGLErrorMessage() {
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return this.getErrorMessage( 1 );
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}
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static getWebGL2ErrorMessage() {
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return this.getErrorMessage( 2 );
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}
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static getErrorMessage( version ) {
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const names = {
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1: 'WebGL',
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2: 'WebGL 2'
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};
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const contexts = {
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1: window.WebGLRenderingContext,
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2: window.WebGL2RenderingContext
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};
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let message = 'Your $0 does not seem to support <a href="http://khronos.org/webgl/wiki/Getting_a_WebGL_Implementation" style="color:#000">$1</a>';
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const element = document.createElement( 'div' );
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element.id = 'webglmessage';
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element.style.fontFamily = 'monospace';
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element.style.fontSize = '13px';
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element.style.fontWeight = 'normal';
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element.style.textAlign = 'center';
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element.style.background = '#fff';
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element.style.color = '#000';
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element.style.padding = '1.5em';
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element.style.width = '400px';
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element.style.margin = '5em auto 0';
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if ( contexts[ version ] ) {
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message = message.replace( '$0', 'graphics card' );
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} else {
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message = message.replace( '$0', 'browser' );
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}
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message = message.replace( '$1', names[ version ] );
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element.innerHTML = message;
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return element;
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}
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}
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export default WebGL;
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