Information about new OpenGL pipeline

[itsmattkc]

As has been mentioned previously here and on the original repo, there's a new OpenGL pipeline that's close to being merged in and these effects will need to be modified for that so I thought I'd start some discussion.

The main differences will be no common.frag or common.vert and the function will have to be in the form of:

vec4 process(vec4 color) {
    return changesTo(color);
}

rather than:

void main(void) {
    gl_FragColor = changesTo(color);
}

You can see an example of this here: https://github.com/olive-editor/olive/blob/furtherocio/effects/shaders/boxblur.frag

Additionally the compositing will all occur in scene-referred linear color space, as opposed to the current unmanaged color space. I'm not yet sure whether the effect will work in scene-linear without modifications, but it'll be something to look into once the branch is ready for merging.

[cgvirus]

Thanks for the heads up. I will test them when it's green.

[cgvirus]

@itsmattkc Hi, is there any estimated time of merging OCIO implementation? So far testing with OCIIO brunch was successful. Let me know please. Thanks.

[itsmattkc]

Hi, apologies for the late response. A caching system is currently being implemented into that branch, and after that and some testing it should be ready to merge. I would estimate around 2-3 weeks. If your effects are already compliant with the current furtherocio branch, I expect they'll remain compliant when it gets merged in. I'll update here if anything changes.

[cgvirus]

Thanks @itsmattkc. Please let me know here as well when the merge is done. Till then I am limiting this repo only to non color effects like transitions etc. Thanks again.