access particular set of pixels MTLTexture in melal

I created a MTLtexture using UIImage data as follows.

var texture = metalView.currentDrawable!.texture
let uiImg = createImageFromCurrentDrawable()

guard let device = metalView.device else {
fatalError("Device not created. Run on a physical device")
}
let textureLoader = MTKTextureLoader(device:device)
let imageData: NSData = UIImagePNGRepresentation(uiImg)! as NSData
texture = try! textureLoader.newTexture(data: imageData as Data, options: [MTKTextureLoader.Option.allocateMipmaps : (false as NSNumber)])


what I need to do is change pixels color in MTLTexture.Not all of them.So Is it possible to access particular set of pixels in MTLtexture and write into it in metal?

1 Answer
1

Yes, as a look at the MTLTexture documentation would have shown you. You can use one of the getBytes() methods to copy a region of texture data out to a buffer, and one of the replace() methods to replace a region of the texture's pixel with data from a buffer you supply.

MTLTexture

getBytes()

replace()

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