---
name: primitives_gallery
lang: cpp
domain: gfx
description: "Visual catalog de primitivas C++ UI del fn_registry. Demos por categoria (charts, controls, layout, gl_info). Soporta modo --capture para regresion visual."
tags: [imgui, gallery, gfx, demo, capture]
uses_functions: []
uses_types: []
framework: "imgui"
entry_point: "main.cpp"
dir_path: "cpp/apps/primitives_gallery"
repo_url: ""
---

# primitives_gallery

Catalogo visual de las primitivas y componentes ImGui del registry. Cada demo se carga al hacer click en su entrada del sidebar.

## Build & run

```bash
cd cpp && cmake --build build --target primitives_gallery -j
./build/primitives_gallery
```

## Modo capture (regresion visual)

```bash
./build/primitives_gallery --capture <out_dir>
```

Renderiza cada demo offscreen y guarda PNGs en `<out_dir>/`. Permite gate visual via golden images.

## Notas

- `auto_dockspace = false` — usa `fullscreen_window` que ocupa todo el viewport.
- `init_gl_loader = true` — necesario para demos de OpenGL 4.3 core (compute, SSBOs).