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/**
* @author alteredq / http://alteredqualia.com/
* @author mr.doob / http://mrdoob.com/
*/
var WEBGL = {
isWebGLAvailable: function () {
try {
var canvas = document.createElement( 'canvas' );
return !! ( window.WebGLRenderingContext && ( canvas.getContext( 'webgl' ) || canvas.getContext( 'experimental-webgl' ) ) );
} catch ( e ) {
return false;
}
},
isWebGL2Available: function () {
try {
var canvas = document.createElement( 'canvas' );
return !! ( window.WebGL2RenderingContext && canvas.getContext( 'webgl2' ) );
} catch ( e ) {
return false;
}
},
getWebGLErrorMessage: function () {
return this.getErrorMessage( 1 );
},
getWebGL2ErrorMessage: function () {
return this.getErrorMessage( 2 );
},
getErrorMessage: function ( version ) {
var names = {
1: 'WebGL',
2: 'WebGL 2'
};
var contexts = {
1: window.WebGLRenderingContext,
2: window.WebGL2RenderingContext
};
var message = 'Your $0 does not seem to support <a href="http://khronos.org/webgl/wiki/Getting_a_WebGL_Implementation" style="color:#000">$1</a>';
var element = document.createElement( 'div' );
element.id = 'webglmessage';
element.style.fontFamily = 'monospace';
element.style.fontSize = '13px';
element.style.fontWeight = 'normal';
element.style.textAlign = 'center';
element.style.background = '#fff';
element.style.color = '#000';
element.style.padding = '1.5em';
element.style.width = '400px';
element.style.margin = '5em auto 0';
if ( contexts[ version ] ) {
message = message.replace( '$0', 'graphics card' );
} else {
message = message.replace( '$0', 'browser' );
}
message = message.replace( '$1', names[ version ] );
element.innerHTML = message;
return element;
}
};
export { WEBGL };
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