Accueil / npm / three@0.171.0 / src / renderers / webgpu / utils / WebGPUUtils.js
WebGPUUtils.js
import { GPUPrimitiveTopology, GPUTextureFormat } from './WebGPUConstants.js';
class WebGPUUtils {
constructor( backend ) {
this.backend = backend;
}
getCurrentDepthStencilFormat( renderContext ) {
let format;
if ( renderContext.depthTexture !== null ) {
format = this.getTextureFormatGPU( renderContext.depthTexture );
} else if ( renderContext.depth && renderContext.stencil ) {
format = GPUTextureFormat.Depth24PlusStencil8;
} else if ( renderContext.depth ) {
format = GPUTextureFormat.Depth24Plus;
}
return format;
}
getTextureFormatGPU( texture ) {
return this.backend.get( texture ).format;
}
getCurrentColorFormat( renderContext ) {
let format;
if ( renderContext.textures !== null ) {
format = this.getTextureFormatGPU( renderContext.textures[ 0 ] );
} else {
format = this.getPreferredCanvasFormat(); // default context format
}
return format;
}
getCurrentColorSpace( renderContext ) {
if ( renderContext.textures !== null ) {
return renderContext.textures[ 0 ].colorSpace;
}
return this.backend.renderer.outputColorSpace;
}
getPrimitiveTopology( object, material ) {
if ( object.isPoints ) return GPUPrimitiveTopology.PointList;
else if ( object.isLineSegments || ( object.isMesh && material.wireframe === true ) ) return GPUPrimitiveTopology.LineList;
else if ( object.isLine ) return GPUPrimitiveTopology.LineStrip;
else if ( object.isMesh ) return GPUPrimitiveTopology.TriangleList;
}
getSampleCount( sampleCount ) {
let count = 1;
if ( sampleCount > 1 ) {
// WebGPU only supports power-of-two sample counts and 2 is not a valid value
count = Math.pow( 2, Math.floor( Math.log2( sampleCount ) ) );
if ( count === 2 ) {
count = 4;
}
}
return count;
}
getSampleCountRenderContext( renderContext ) {
if ( renderContext.textures !== null ) {
return this.getSampleCount( renderContext.sampleCount );
}
return this.getSampleCount( this.backend.renderer.samples );
}
getPreferredCanvasFormat() {
// TODO: Remove this check when Quest 34.5 is out
// https://github.com/mrdoob/three.js/pull/29221/files#r1731833949
if ( navigator.userAgent.includes( 'Quest' ) ) {
return GPUTextureFormat.BGRA8Unorm;
} else {
return navigator.gpu.getPreferredCanvasFormat();
}
}
}
export default WebGPUUtils;