添加关照、全局等高线、修改图层问题

static/sdk/three/jsm/renderers/webgpu/utils/WebGPUTexturePassUtils.js

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+import { GPUTextureViewDimension, GPUIndexFormat, GPUFilterMode, GPUPrimitiveTopology, GPULoadOp, GPUStoreOp } from './WebGPUConstants.js';
+
+class WebGPUTexturePassUtils {
+
+	constructor( device ) {
+
+		this.device = device;
+
+		const mipmapVertexSource = `
+struct VarysStruct {
+	@builtin( position ) Position: vec4<f32>,
+	@location( 0 ) vTex : vec2<f32>
+};
+
+@vertex
+fn main( @builtin( vertex_index ) vertexIndex : u32 ) -> VarysStruct {
+
+	var Varys : VarysStruct;
+
+	var pos = array< vec2<f32>, 4 >(
+		vec2<f32>( -1.0,  1.0 ),
+		vec2<f32>(  1.0,  1.0 ),
+		vec2<f32>( -1.0, -1.0 ),
+		vec2<f32>(  1.0, -1.0 )
+	);
+
+	var tex = array< vec2<f32>, 4 >(
+		vec2<f32>( 0.0, 0.0 ),
+		vec2<f32>( 1.0, 0.0 ),
+		vec2<f32>( 0.0, 1.0 ),
+		vec2<f32>( 1.0, 1.0 )
+	);
+
+	Varys.vTex = tex[ vertexIndex ];
+	Varys.Position = vec4<f32>( pos[ vertexIndex ], 0.0, 1.0 );
+
+	return Varys;
+
+}
+`;
+
+		const mipmapFragmentSource = `
+@group( 0 ) @binding( 0 )
+var imgSampler : sampler;
+
+@group( 0 ) @binding( 1 )
+var img : texture_2d<f32>;
+
+@fragment
+fn main( @location( 0 ) vTex : vec2<f32> ) -> @location( 0 ) vec4<f32> {
+
+	return textureSample( img, imgSampler, vTex );
+
+}
+`;
+
+		const flipYFragmentSource = `
+@group( 0 ) @binding( 0 )
+var imgSampler : sampler;
+
+@group( 0 ) @binding( 1 )
+var img : texture_2d<f32>;
+
+@fragment
+fn main( @location( 0 ) vTex : vec2<f32> ) -> @location( 0 ) vec4<f32> {
+
+	return textureSample( img, imgSampler, vec2( vTex.x, 1.0 - vTex.y ) );
+
+}
+`;
+		this.mipmapSampler = device.createSampler( { minFilter: GPUFilterMode.Linear } );
+		this.flipYSampler = device.createSampler( { minFilter: GPUFilterMode.Nearest } ); //@TODO?: Consider using textureLoad()
+
+		// We'll need a new pipeline for every texture format used.
+		this.transferPipelines = {};
+		this.flipYPipelines = {};
+
+		this.mipmapVertexShaderModule = device.createShaderModule( {
+			label: 'mipmapVertex',
+			code: mipmapVertexSource
+		} );
+
+		this.mipmapFragmentShaderModule = device.createShaderModule( {
+			label: 'mipmapFragment',
+			code: mipmapFragmentSource
+		} );
+
+		this.flipYFragmentShaderModule = device.createShaderModule( {
+			label: 'flipYFragment',
+			code: flipYFragmentSource
+		} );
+
+	}
+
+	getTransferPipeline( format ) {
+
+		let pipeline = this.transferPipelines[ format ];
+
+		if ( pipeline === undefined ) {
+
+			pipeline = this.device.createRenderPipeline( {
+				vertex: {
+					module: this.mipmapVertexShaderModule,
+					entryPoint: 'main'
+				},
+				fragment: {
+					module: this.mipmapFragmentShaderModule,
+					entryPoint: 'main',
+					targets: [ { format } ]
+				},
+				primitive: {
+					topology: GPUPrimitiveTopology.TriangleStrip,
+					stripIndexFormat: GPUIndexFormat.Uint32
+				},
+				layout: 'auto'
+			} );
+
+			this.transferPipelines[ format ] = pipeline;
+
+		}
+
+		return pipeline;
+
+	}
+
+	getFlipYPipeline( format ) {
+
+		let pipeline = this.flipYPipelines[ format ];
+
+		if ( pipeline === undefined ) {
+
+			pipeline = this.device.createRenderPipeline( {
+				vertex: {
+					module: this.mipmapVertexShaderModule,
+					entryPoint: 'main'
+				},
+				fragment: {
+					module: this.flipYFragmentShaderModule,
+					entryPoint: 'main',
+					targets: [ { format } ]
+				},
+				primitive: {
+					topology: GPUPrimitiveTopology.TriangleStrip,
+					stripIndexFormat: GPUIndexFormat.Uint32
+				},
+				layout: 'auto'
+			} );
+
+			this.flipYPipelines[ format ] = pipeline;
+
+		}
+
+		return pipeline;
+
+	}
+
+	flipY( textureGPU, textureGPUDescriptor, baseArrayLayer = 0 ) {
+
+		const format = textureGPUDescriptor.format;
+		const { width, height } = textureGPUDescriptor.size;
+
+		const transferPipeline = this.getTransferPipeline( format );
+		const flipYPipeline = this.getFlipYPipeline( format );
+
+		const tempTexture = this.device.createTexture( {
+			size: { width, height, depthOrArrayLayers: 1 },
+			format,
+			usage: GPUTextureUsage.RENDER_ATTACHMENT | GPUTextureUsage.TEXTURE_BINDING
+		} );
+
+		const srcView = textureGPU.createView( {
+			baseMipLevel: 0,
+			mipLevelCount: 1,
+			dimension: GPUTextureViewDimension.TwoD,
+			baseArrayLayer
+		} );
+
+		const dstView = tempTexture.createView( {
+			baseMipLevel: 0,
+			mipLevelCount: 1,
+			dimension: GPUTextureViewDimension.TwoD,
+			baseArrayLayer: 0
+		} );
+
+		const commandEncoder = this.device.createCommandEncoder( {} );
+
+		const pass = ( pipeline, sourceView, destinationView ) => {
+
+			const bindGroupLayout = pipeline.getBindGroupLayout( 0 ); // @TODO: Consider making this static.
+
+			const bindGroup = this.device.createBindGroup( {
+				layout: bindGroupLayout,
+				entries: [ {
+					binding: 0,
+					resource: this.flipYSampler
+				}, {
+					binding: 1,
+					resource: sourceView
+				} ]
+			} );
+
+			const passEncoder = commandEncoder.beginRenderPass( {
+				colorAttachments: [ {
+					view: destinationView,
+					loadOp: GPULoadOp.Clear,
+					storeOp: GPUStoreOp.Store,
+					clearValue: [ 0, 0, 0, 0 ]
+				} ]
+			} );
+
+			passEncoder.setPipeline( pipeline );
+			passEncoder.setBindGroup( 0, bindGroup );
+			passEncoder.draw( 4, 1, 0, 0 );
+			passEncoder.end();
+
+		};
+
+		pass( transferPipeline, srcView, dstView );
+		pass( flipYPipeline, dstView, srcView );
+
+		this.device.queue.submit( [ commandEncoder.finish() ] );
+
+		tempTexture.destroy();
+
+	}
+
+	generateMipmaps( textureGPU, textureGPUDescriptor, baseArrayLayer = 0 ) {
+
+		const pipeline = this.getTransferPipeline( textureGPUDescriptor.format );
+
+		const commandEncoder = this.device.createCommandEncoder( {} );
+		const bindGroupLayout = pipeline.getBindGroupLayout( 0 ); // @TODO: Consider making this static.
+
+		let srcView = textureGPU.createView( {
+			baseMipLevel: 0,
+			mipLevelCount: 1,
+			dimension: GPUTextureViewDimension.TwoD,
+			baseArrayLayer
+		} );
+
+		for ( let i = 1; i < textureGPUDescriptor.mipLevelCount; i ++ ) {
+
+			const bindGroup = this.device.createBindGroup( {
+				layout: bindGroupLayout,
+				entries: [ {
+					binding: 0,
+					resource: this.mipmapSampler
+				}, {
+					binding: 1,
+					resource: srcView
+				} ]
+			} );
+
+			const dstView = textureGPU.createView( {
+				baseMipLevel: i,
+				mipLevelCount: 1,
+				dimension: GPUTextureViewDimension.TwoD,
+				baseArrayLayer
+			} );
+
+			const passEncoder = commandEncoder.beginRenderPass( {
+				colorAttachments: [ {
+					view: dstView,
+					loadOp: GPULoadOp.Clear,
+					storeOp: GPUStoreOp.Store,
+					clearValue: [ 0, 0, 0, 0 ]
+				} ]
+			} );
+
+			passEncoder.setPipeline( pipeline );
+			passEncoder.setBindGroup( 0, bindGroup );
+			passEncoder.draw( 4, 1, 0, 0 );
+			passEncoder.end();
+
+			srcView = dstView;
+
+		}
+
+		this.device.queue.submit( [ commandEncoder.finish() ] );
+
+	}
+
+}
+
+export default WebGPUTexturePassUtils;