Q: cmsDoTransform(): using same buffer for in and out about little-cms

[mm2]

You can reuse the same buffer as long as the output pixel size is same as input pixel size. So RGBA_FLT to LABA_FLT is ok, but CMYK_FLT to LAB_FLT is not.

The reason is the engine keeps two pointers, one for input and other output. If the output pixel size is less then the input pixel size, input will be overwritten when applying color transform.

[LebedevRI]

You can reuse the same buffer as long as the output pixel size is same as input pixel size.

Awesome!
Thank you for clarifying this. :)