How can I downsample a texture?

Joshua Beckwith

I'm using the garment transfer with copyFrame, but it's behaving really poorly on my device. Is there some way to downsample the copied texture?

Joshua Beckwith

I'm not sure if this will increase performance or not, but at least I managed to downsample the texture with a few ProceduralTextureProviders

//@input float downScale = 3 {"widget": "slider", "min": 1, "max":20, "step": 1}
/** @type {number} */
var downScale = script.downScale

//@input Component.Image image
/** @type {Image} */
var image = script.image

//@input Asset.Texture cameraTexture
/** @type {Texture} */
var cameraTexture = script.cameraTexture

function doSnapshot() {
  var channels = 4 // RGBA
  var frame = cameraTexture.copyFrame()
  var camTex = ProceduralTextureProvider.createFromTexture(frame)
  var camWidth = camTex.getWidth()
  var camHeight = camTex.getHeight()
  var camPixels = new Uint8Array(camWidth * camHeight * channels)
  camTex.control.getPixels(0, 0, camWidth, camHeight, camPixels)

  var scale = 1/downScale
  print(scale)
  var width = Math.floor(camWidth * scale)
  var height = Math.floor(camHeight * scale)

  var newTex = ProceduralTextureProvider.create(width, height, Colorspace.RGBA)
  var newData = new Uint8Array(width * height * channels)

  for (var y = 0; y < height; y++) {
    for (var x = 0; x < width; x++) {
      var newIndex = (y * width + x) * channels
      var oldIndex = (y * camWidth / scale + x / scale) * channels

      // Set R, G, B, A
      newData[newIndex] = camPixels[oldIndex]
      newData[newIndex + 1] = camPixels[oldIndex + 1]
      newData[newIndex + 2] = camPixels[oldIndex + 2]
      newData[newIndex + 3] = 255
    }
  }

  newTex.control.setPixels(0, 0, width, height, newData)
  image.mainMaterial.mainPass.baseTex = newTex
  snapDelay.reset(2)
}

var snapDelay = script.createEvent('DelayedCallbackEvent')
snapDelay.bind(doSnapshot)
snapDelay.reset(1)

𝕵𝖔𝖊𝖑 𝕯𝖈𝖔𝖘𝖙𝖆🤘😠🎸

If I face such issue with size of texture go to explore in resource panel copy the image on desktop. I edit them in Photoshop reducing the size + quality and save it on desktop as a new file.
And dragging it back to lens studio and assigning it with respective material. And it just works other then doing the whole long process in 3d program.

Popul AR

Thank you for your insights, but unfortunately I can't do that for device camera texture snapshots since they are generated at runtime