Copy texture file, modify and save as image.

[leaden pier]

I want to take a texture, replace the colours with some colours and save the new one as a file.

My idea is

• Copy file
• Loop over pixels
• Check if selected pixel colour is equal to one of the colours I wish to replace
• if it is, replace colour
• save file of modified texture to disk

is there unity API which lets me do this? I know there's texture2d.getpixels but I'm not sure if it lets you write. I also want to make a copy of the texture in memory so as to not mess up the original. Thanks!

[unborn dawn]

Use ImageConversion to read the file into a Texture2D (LoadImage), modify it in place and write back the byte array given by EncodeToJPG/PNG/TGA/EXR

The Texture2D is already a copy of the image in the disk so you don't have to worry about messing up the original

[leaden pier]

I was thinking of using UI toolkit for this, and having a Texture2D object field instead of reading directly from the disk like that, is that possible?

[unborn dawn]

Using UI Toolkit for what and why?

If you mean you want to make an editor extension window that does that, sure

If you already have the image as Texture2D, you don't have to read it from a file obviously

[leaden pier]

yeah, to make a window for it. How can I copy a texture2D, if I need to at all?

[unborn dawn]

You can construct a new one and use Graphics.CopyTexture