three
Version:
JavaScript 3D library
75 lines (39 loc) • 1.32 kB
JavaScript
import ChainMap from './ChainMap.js';
import RenderContext from './RenderContext.js';
class RenderContexts {
constructor() {
this.chainMaps = {};
}
get( scene, camera, renderTarget = null ) {
const chainKey = [ scene, camera ];
let attachmentState;
if ( renderTarget === null ) {
attachmentState = 'default';
} else {
let format, count;
if ( renderTarget.isWebGLMultipleRenderTargets ) {
format = renderTarget.texture[ 0 ].format;
count = renderTarget.texture.length;
} else {
format = renderTarget.texture.format;
count = 1;
}
attachmentState = `${ count }:${ format }:${ renderTarget.samples }:${ renderTarget.depthBuffer }:${ renderTarget.stencilBuffer }`;
}
const chainMap = this.getChainMap( attachmentState );
let renderState = chainMap.get( chainKey );
if ( renderState === undefined ) {
renderState = new RenderContext();
chainMap.set( chainKey, renderState );
}
if ( renderTarget !== null ) renderState.sampleCount = renderTarget.samples === 0 ? 1 : renderTarget.samples;
return renderState;
}
getChainMap( attachmentState ) {
return this.chainMaps[ attachmentState ] || ( this.chainMaps[ attachmentState ] = new ChainMap() );
}
dispose() {
this.chainMaps = {};
}
}
export default RenderContexts;