Tracking Issue: Graphene engine development

[TrueDoctor]

Nodes in layers

• Implement the Proto Graph (01bbe5d and many subsequent commits)
• Implement the Document Graph #771
• Add a Node Graph adjustment layer type for bitmap compositing #808
• API connecting the frontend with Document Graph #800
• MVP improvements for the rudimentary node graph #851
• Frontend for the node graph #580
• Rename /graphene to /document-legacy #799
• Allow users to view and edit nested node networks #880
• Node graph editing UX improvements #881
• Gaussian Blur and kernel-based nodes #911
• Foundations for GPU-based nodes with RustGPU and WGPU #810
• Implement types and type checking in the node graph #888

Winding down legacy layers before the big switch to all nodes

• Add an Image Frame node and make the graph output vector data #992
• Replace legacy layer types with nodes #768
• Port Imaginate layers to nodes #886
• Port Image layers to nodes #889
• Migrate Shape layers to nodes #997
• Port Text layers to nodes #998
• Add a Layer node and restructure artwork data types to feed into a layer and out the graph #1205
• Display layer thumbnails in the node graph #1211
• Replace legacy artboards with artboard nodes #1171
• Add a node graph to the document itself #1224
• Render node-based artboards #1221
• Fix Artboard tool and editor manipulation of node-based artboards #1222
• Remove legacy artboards in lieu of node-based artboards #1223
• Frontend layer panel UI for node-based layer compositing stacks #1175

The big switch from legacy layers to nodes

This all had to happen at once because it fundamentally breaks major functionality. The first half was done through a continuously-rebased branch living atop master. The second half was done in master in between production releases while many features were missing and caused crashes until each were fixed. Tracked in:

• Tracking Issue: Document graph migration MVP #1394

Cleanup after the full switch to nodes

• Rebuild the new layer panel frontend to replicate the mockup UI #882
• Replace the overlays system with a simple immediate-mode system #1167
• Remove legacy layers #1522
• Remove document-legacy #1520
• Remove references to LayerId and Vec<u64> layer paths #1525
• Frontend types and error reporting from the node graph UI #1533
• Hide the cull node from the user #1611

User-facing graph interaction

• Make all nodes stackable and generalize layers as stacked Merge nodes #1510
• Creating user-defined subgraphs #1172
• Vector Edit node #1162
• Make tools use primitive vector shape generator nodes #134

[Keavon]

Post-MVP work is now tracked in #2350.