class WebGL {
static isWebGLAvailable() {
try {
const canvas = document.createElement( 'canvas' );
return !! ( window.WebGLRenderingContext && ( canvas.getContext( 'webgl' ) || canvas.getContext( 'experimental-webgl' ) ) );
} catch ( e ) {
return false;
}
}
static isWebGL2Available() {
try {
const canvas = document.createElement( 'canvas' );
return !! ( window.WebGL2RenderingContext && canvas.getContext( 'webgl2' ) );
} catch ( e ) {
return false;
}
}
static isColorSpaceAvailable( colorSpace ) {
try {
const canvas = document.createElement( 'canvas' );
const ctx = window.WebGL2RenderingContext && canvas.getContext( 'webgl2' );
ctx.drawingBufferColorSpace = colorSpace;
return ctx.drawingBufferColorSpace === colorSpace; // deepscan-disable-line SAME_OPERAND_VALUE
} catch ( e ) {
return false;
}
}
static getWebGLErrorMessage() {
return this.getErrorMessage( 1 );
}
static getWebGL2ErrorMessage() {
return this.getErrorMessage( 2 );
}
static getErrorMessage( version ) {
const names = {
1: 'WebGL',
2: 'WebGL 2'
};
const contexts = {
1: window.WebGLRenderingContext,
2: window.WebGL2RenderingContext
};
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>';
const 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 default WebGL;
