We're using the well-known image processing library GPUImage as ported for Android.
The one here: https://github.com/CyberAgent/android-gpuimage
Most of our desired controls have obvious equivalents in GPUImage; brightness is GPUImageBrightnessFilter, sharpen is GPUImageSharpenFilter, etc.
What, however, is the equivalent of Instagram's Fade?
We're sure that Fade is just a pretty word for some type of colour desaturation of sorts, but we're not quite sure.
Maybe GPUImageSaturationFilter with specific parameters? Or something more custom?
Part 2
While I'm at it - same question, but for Warmth aka Temperature.
We're using GPUImageWhiteBalanceFilter as it appears to be "kelvin-based" and seems to be the closest thing to Warmth.
Thank you!