vrendergraph

vrendergraph is a tiny data-driven render pipeline layer that builds a runtime FrameGraph from JSON.

Goals:

• Keep the runtime builder minimal and deterministic (execute passes in passes[] order).
• Pass IO is described via inputs / outputs slot maps.
• Optional meta field stores editor/tool UI state (node positions, zoom/pan, etc.) and is ignored by runtime.

JSON format

{
  "resources": ["backbuffer"],
  "passes": [
    {
      "enabled": true,
      "id": "Depth_Pre",
      "outputs": {
        "depth": "Depth_Pre.depth"
      },
      "type": "Depth_Pre"
    },
    {
      "enabled": true,
      "id": "GBuffer",
      "inputs": {
        "depth": "Depth_Pre.depth"
      },
      "outputs": {
        "gbuffer": "GBuffer.gbuffer"
      },
      "type": "GBuffer"
    },
    {
      "enabled": true,
      "id": "Lighting",
      "inputs": {
        "gbuffer": "GBuffer.gbuffer"
      },
      "outputs": {
        "hdr": "Lighting.hdr"
      },
      "type": "Lighting"
    },
    {
      "enabled": true,
      "id": "Tonemap",
      "inputs": {
        "hdr": "Lighting.hdr"
      },
      "outputs": {
        "ldr": "Tonemap.ldr"
      },
      "type": "Tonemap"
    },
    {
      "enabled": true,
      "id": "Present",
      "inputs": {
        "backbuffer": "backbuffer",
        "color": "Tonemap.ldr"
      },
      "type": "Present"
    }
  ],
  "meta": {
    "editor": {
      "view": { "zoom": 1.0, "pan": [0.0, 0.0] },
      "nodes": {
        "Depth_Pre": { "pos": [-300.0, 0.0] }
        // ...
      }
    }
  }
}

Notes:

• passes[] is required.
• resources[] can be empty.
• meta{} is optional and intended for tools.

Documentation

• Runtime Integration
• Editor Integration

Editor helper header

vrendergraph_editor.hpp provides header-only helpers to read/write editor UI state into RenderGraphDesc::meta.

imgui.h and imnodes are needed.

License

This project is under the MIT license.