Developer's guide

Understanding color and color management

Some useful ressources to jump into digital color management, editing pipeline, calibrations, view transform, etc. :

• https://www.visualeffectssociety.com/sites/default/files/files/cinematic_color_ves.pdf
• https://acescentral.com/
• http://last.hit.bme.hu/download/firtha/video/Colorimetry/Fairchild_M._Color_appearance_models__2005.pdf

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Modules

Modules are the interfaces for IOPs, i.e. image-processing filters stacked in the pixelpipe. IOPs can be found in src/iop and the IOP API can be found in the header src/iop/iop_api.h.

Most IOP have 3 variant of their pixel-filtering part:

1. a pure C implementation, in process()
2. a C optimized version, with SSE2 intrinsics, in process_sse2()
3. an OpenCL version, offloading the computation to the GPU, in process_opencl().

An example of a dummy IOP can be found in src/iop/useless.c and used as a boilerplate.

If you add a new IOP, be sure to add the C file in src/iop/CMakeLists.txt#L69 and deal with its priority in the pixelpipe by adding a new node in tools/iop_dependencies.py

Libs