Description =========== Now that we have HDR support on Linux, we should get Krita to work properly with HDR. This comprises 3 goals: - Functional UI - Ability to master/export HDR properly. - Fixing the filters. ```mermaid flowchart start; hdrmetadata["HDR Metadata"] --> start cicpHandlingInICC["CICP handling in ICC"] --> start gamutmap["Gamut and Tone Mapping"] --> cicpHandlingInICC filters --> hdrmetadata exportToPng["Export CICP/HDR meta to PNG"] --> hdrmetadata exportToPng["Export CICP/HDR meta to PNG"] --> cicpHandlingInICC ui["User Interface bugs"] --> start improveWayland["Improve communication with Wayland CM"] --> hdrmetadata ``` User interface ---------------- - [x] Fix UI to be color managed (see #46 ) - [x] Allow histogram to handle 'hdr' values. - [x] Show wayland 'preferred colorspace' inside xy-diagram-widget. - [ ] Improve communication with wayland + Zoom seems to reset the preferred colorspace somehow. Can we smooth this over? + When drawing a HDR color onto the canvas, it takes a bit before the colors visually render as HDR. Probably some kind of metadata issue??? (Seems to be a driver-trick.) HDR Metadata ------------ - [ ] Use these to handle filters better. - [ ] Use these to export file info better. - [ ] CICP handling for PNG - [x] CICP handling for ICC??? - [ ] Do something about the recorder docker output for HDR. Filters ------- Fix filters to work with HDR. May need a range-selector, or using the generated meta-data as input? The items with ??? behind them are ones I am uncertain about. - [ ] Auto contrast - [ ] HSV adjustment (HSL, HSV, HSI, HSY, all these only work in legacy mode) - [ ] Invert - [ ] Levels - [ ] Color Adjustment - [ ] Threshold - [ ] Halftone - [ ] Index colors - [ ] Posterize - [ ] Raindrops - [ ] Fast Color Overlay - [ ] Color Transfer ??? - [ ] Edge Detection - [ ] Gausian High Pass ??? - [ ] Height to Normap Map? (probably broken because edge detection is being weird) - [ ] Emboss (all) - [ ] Unsharp Mask - [ ] Wavelet Noise Reducer (???) - [ ] Gradient map (outputs HDR, but doesn't understand how to interpret it.) - [ ] Palettize ??? - [ ] Random Noise??? Tonemap/Gamutmap ---------------- See #110 Color Selectors --------------- Because of the three-way technology transition (Qt5 -> Qt6, X11 -> wayland, qwidgets -> qml), I propose we first get the small color selector to work in all the modern technologies before transitioning the wide-gamut selector and other dockers. In the worst case, we might be able to use tonemapping to at the very least have the HDR colors display proper in SDR. Links ===== - [old phab task for maxfall/maxcll](https://phabricator.kde.org/T10627) - Official def. maxfall/maxccl: https://ia800707.us.archive.org/27/items/CTA-861-G/CTA-861-G.pdf - woltherav/krita#63 -- links to tone mapping info, and gamut mapping experiments. - Probably irrelevant Qt hdr metadata support -- https://doc.qt.io/qt-6/qrhiswapchainhdrinfo.html - [KA thread](https://krita-artists.org/t/6-1-hdr-development-thread/180642) Will add more later.