import { RenderPass }	from "../framework/RenderPass.js";

import Shader			from "../framework/WebGpu.js";


export class RowFFTPass extends RenderPass {

	async create( ) {

		this.shader				= new Shader( this.device );

		await this.shader.setup( "shaders/fft_row.wgsl" );

		const oceanBlock		= this.pipeline.getBlockByName( "ocean" );

		const spectrumPass		= oceanBlock.getPass( "Spectrum" );

		const spectrumReal		= spectrumPass.shader.getBuffer( "spectrumReal" );

		const spectrumImag		= spectrumPass.shader.getBuffer( "spectrumImag" );

		await this.shader.setBuffer( "inputReal", spectrumReal );

		await this.shader.setBuffer( "inputImag", spectrumImag );

		this.shader.setVariable( "outputReal", this.pipeline.memory.rowReal );

		this.shader.setVariable( "outputImag", this.pipeline.memory.rowImag );

		this.shader.setVariable( "params", this.pipeline.memory.computeParams );

	}


	bindBuffers( ) {

		this.shader.setVariable( "params", this.pipeline.memory.computeParams );

	}


	async execute( ) {

		const groups				= this.pipeline.gridSize;

		await this.shader.execute( groups, 1, 1 );

	}

}