Log output and 3D LUTs should be supported

[Andrew Baldwin]

It should be possible to produce Log-scale output.

It should be possible to process the pixels with a chain of 3D LUTs for different styles.

[Andrew Baldwin]

Log output implemented in cf89cf66a2f25260b2466d3e424ff9bfdf995c15, included in 1.0.4 release

[Andrew Baldwin]

Should consider supporting Adobe DCP files (see http://dcptool.sourceforge.net/Introduction.html) in addition to LUTs.

There seem to be a few different DCPs available for correctly converting raw data into different log colour spaces ready for a particular LUT family.

Not sure at this point how challenging this would be to do.

[Andrew Baldwin]

Initial 3D LUT support (at this point for viewing only, not export) implemented in cac645cef2deb629928cc33724e60779e3c9f397

Only .cube files are supported. See commit for more details.

[Andrew Baldwin]

Now chosen 3D LUT is persisted and used for exporting. 25e7aa062547c87feadc4f3e65eb3138ec0ee438

[Andrew Baldwin]

1D LUTs have also been introduced as of 86ea7d730a46137b1a09c9757aad24896e5d38c0.

The new pipeline will support 1D LUT -> 3D LUT -> 1D LUT, any of which are optional.

Later, the old hard-coded tone mapping functions will be replaced by equivalent 1D LUTs, or user supplied/defined LUTs or curves.

[Andrew Baldwin]

Full 1D1->3D->1D2 LUT stack is now working as of 867005f4ed5d12325e7b4afa4da3b8798773842e

LUTs can be chosen in UI (from 1D and 3D .cube files in .mlrawviewer/lut/)

Shift LEFT/RIGHT chooses 1D LUT1

Shift UP/DOWN chooses 3D LUT

Shift Z/X chooses 1D LUT2

LUT stack is used for MOV export

Generator for 1D LUTs has been made with replacements for all old tone mapping curves.

[Andrew Baldwin]

Implemented in release 1.2.3