Qt Rewrite

[njbrown]

Summary

This rewrites TextureLab as a native Qt/C++ desktop app, replacing the Electron/Vue/TypeScript version. It's large: 423 commits, 509 files, +89k/−36k lines. It also rolls in the feature PRs merged into rewrite: #75, #76, #77, #78, #79, #82, #84 and #85.

Architecture

• The app is now built with CMake and Qt, with docking panels from Qt Advanced Docking System (ADS, added as a submodule).
• The Electron, web, Vue and TypeScript sources are removed.
• The code is split into modules: texturelab (the app), nodegraph, viewer3d, colorpicker, catalog and theme.

Node graph & rendering

• A new node graph: ports, connection dragging with snapping, deletion, frames, comments and a spacebar node search.
• Nodes render on a dedicated worker thread and are only re-rendered when something upstream changes.
• Nodes that need CPU processing, such as Flood Fill, are supported.
• Node libraries v1 and v2 are ported, and a new v3 library adds a large set of new nodes (see Libv3 #85). A migration system upgrades old projects to v3.
• Project loading and saving stay compatible with the existing file format.

Viewers

• 2D view: tiling, centering, saving the image and copying it to the clipboard.
• 3D view:
  • PBR rendering with image-based lighting, using albedo, normal, roughness, metalness, height and alpha maps.
  • HDR skies, punctual lights and adjustable environment rotation.
  • Built-in meshes (plane, cube, cylinder, sphere).

Editor

• A props panel with widgets for float, int, bool, enum, string, color, gradient, image and curve values.
• A custom color picker and gradient picker.
• Undo/redo and copy/paste.
• Recent files, drag-and-drop to open files, and embedded example projects.
• Export settings for file pattern, channels and 8/16-bit precision.
• A launcher with a project catalog and update checking.
• A dark QSS theme, a new logo and app icons.

Stability & release

• Sentry/Crashpad crash reporting, with a consent prompt.
• Many threading and memory-safety fixes.
• CI builds for Windows, macOS and Linux, a release workflow, packaging scripts and nightly builds.