mirror of
https://github.com/koel/koel
synced 2024-12-30 06:23:05 +00:00
116 lines
3.7 KiB
TypeScript
116 lines
3.7 KiB
TypeScript
import { audioService } from '@/services'
|
|
import { logger } from '@/utils'
|
|
import shaders from './shaders'
|
|
|
|
export const init = async (container: HTMLElement) => {
|
|
const gl = document.createElement('canvas').getContext('webgl')!
|
|
const postctx = container.appendChild(document.createElement('canvas')).getContext('2d')!
|
|
const postprocess = postctx.canvas
|
|
const canvas = gl.canvas
|
|
const cubeSize = 15
|
|
|
|
const analyzer = audioService.analyzer
|
|
analyzer.smoothingTimeConstant = 0.2
|
|
analyzer.fftSize = 128
|
|
|
|
let spectrumData = new Uint8Array(analyzer.frequencyBinCount)
|
|
|
|
const compileShader = (type, source) => {
|
|
const shader = gl.createShader(type)!
|
|
gl.shaderSource(shader, source)
|
|
gl.compileShader(shader)
|
|
|
|
const status = gl.getShaderParameter(shader, gl.COMPILE_STATUS)
|
|
if (status) return shader
|
|
|
|
logger.error('shader compile error', gl.getShaderInfoLog(shader))
|
|
gl.deleteShader(shader)
|
|
}
|
|
|
|
const createProgram = function (vertexShader, fragmentShader) {
|
|
const program = gl.createProgram()!
|
|
gl.attachShader(program, vertexShader)
|
|
gl.attachShader(program, fragmentShader)
|
|
gl.linkProgram(program)
|
|
|
|
const status = gl.getProgramParameter(program, gl.LINK_STATUS)
|
|
if (status) return program
|
|
|
|
logger.error('program link error', gl.getProgramInfoLog(program))
|
|
gl.deleteProgram(program)
|
|
}
|
|
|
|
const vertexShader = compileShader(gl.VERTEX_SHADER, shaders.vertex(cubeSize))
|
|
const fragmentShader = compileShader(gl.FRAGMENT_SHADER, shaders.fragment())
|
|
|
|
const program = createProgram(vertexShader, fragmentShader)!
|
|
|
|
const aPosition = gl.getAttribLocation(program, 'a_pos')
|
|
const uResolution = gl.getUniformLocation(program, 'u_res')
|
|
const uFrame = gl.getUniformLocation(program, 'u_frame')
|
|
const uSpectrumValue = gl.getUniformLocation(program, 'u_spectrumValue')
|
|
|
|
const vertices: number[] = []
|
|
const vertexBuffer = gl.createBuffer()
|
|
let frame = 0
|
|
|
|
const render = () => {
|
|
frame++
|
|
|
|
analyzer.getByteFrequencyData(spectrumData)
|
|
|
|
// Transfer spectrum data to shader program
|
|
gl.uniform1iv(uSpectrumValue, spectrumData)
|
|
|
|
if (postprocess.width !== postprocess.offsetWidth || postprocess.height !== postprocess.offsetHeight) {
|
|
postprocess.width = postprocess.offsetWidth
|
|
postprocess.height = postprocess.offsetHeight
|
|
canvas.width = postprocess.width
|
|
canvas.height = postprocess.height
|
|
gl.uniform2fv(uResolution, [canvas.width, canvas.height])
|
|
gl.viewport(0, 0, canvas.width, canvas.height)
|
|
}
|
|
|
|
gl.uniform1f(uFrame, frame)
|
|
gl.clear(gl.COLOR_BUFFER_BIT)
|
|
gl.drawArrays(gl.POINTS, 0, vertices.length / 3)
|
|
|
|
// Make Bloom
|
|
postctx.globalAlpha = 1
|
|
postctx.drawImage(canvas, 0, 0)
|
|
postctx.filter = 'blur(4px)'
|
|
postctx.globalCompositeOperation = 'screen'
|
|
postctx.drawImage(canvas, 0, 0)
|
|
postctx.globalCompositeOperation = 'source-over'
|
|
postctx.filter = 'blur(0)'
|
|
|
|
requestAnimationFrame(render)
|
|
}
|
|
|
|
gl.clearColor(0, 0, 0, 1)
|
|
gl.viewport(0, 0, canvas.width, canvas.height)
|
|
gl.useProgram(program)
|
|
gl.uniform2fv(uResolution, new Float32Array([canvas.width, canvas.height]))
|
|
|
|
for (let i = 0; i < cubeSize ** 3; i++) {
|
|
let x = (i % cubeSize)
|
|
let y = Math.floor(i / cubeSize) % cubeSize
|
|
let z = Math.floor(i / cubeSize ** 2)
|
|
x -= cubeSize / 2 - 0.5
|
|
y -= cubeSize / 2 - 0.5
|
|
z -= cubeSize / 2 - 0.5
|
|
|
|
vertices.push(x)
|
|
vertices.push(y)
|
|
vertices.push(z)
|
|
}
|
|
|
|
gl.enableVertexAttribArray(aPosition)
|
|
gl.bindBuffer(gl.ARRAY_BUFFER, vertexBuffer)
|
|
gl.vertexAttribPointer(aPosition, 3, gl.FLOAT, false, 0, 0)
|
|
gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(vertices), gl.STATIC_DRAW)
|
|
|
|
render()
|
|
|
|
return () => gl?.getExtension('WEBGL_lose_context')?.loseContext()
|
|
}
|