查了 wide color jpeg 格式, 目前找到apple 的建議; ---------- File Formats and Color Profiles: ------- Apple has the following suggestions for the file formats and color profiles used in the app's wide color image contents:
Use the "Display P3" color profile for RGB working spaces. Use a 16-bit per color channel mode. Use a Late 2015 iMac (or later) to accurately preview image content. Export image assets as 16-bit PNG files with an embedded "Display P3" ICC profile.