Apple Treats Transparent Images as a Black Background I use Skype and I'm trying to upload a profile image from an iOS device that has a transparent background. Every time I save the image to any iOS device, the transparent background turns black :-/ I have the exact image I want on OSX Skype but it doesn't sync the profile picture across iOS devices. I've re downloaded the app but so far nothing's worked. Is anyone else experiencing this issue or knows how to solve it?
Simply put, iOS uses the JPEG format when saving images to the Camera Roll, and JPEG does not have an alpha channel for transparency. When converting a PNG image to JPEG, all transparency data is lost. What is happening is the color 0x00000000 (RGBA - four octets) is being changed to 0x000000 (RGB - three octets).