@carbonenginejs/format-hlsl

Pure-JavaScript CarbonEngineJS-facing reader for CCP's Tr2 compiled effect container format. No native tooling, no build step; it runs in Node and the browser.

The Tr2 effect container is a Carbon/Trinity format, not a Microsoft one — this package has no DXBC/instruction-decoding vocabulary. It parses the effect header (version, string table, permutation axes and compiled-body offsets) and, per resolved permutation, the technique/pass table and per-stage constant, resource, sampler and render-state metadata. Shader bytecode bodies stay as opaque bytes; decoding DXBC/HLSL bytecode itself is @carbonenginejs/format-dxbc's job, not this package's — @carbonenginejs/format-hlsl has zero dependency on it.

CarbonEngine and Fenris Creations (CCP Games) are named in this package because the Tr2 container shape was reverse-engineered for Carbon/Trinity effect interoperability. This package is not affiliated with or endorsed by CCP Games.

Package

• npm: https://www.npmjs.com/package/@carbonenginejs/format-hlsl
• package: @carbonenginejs/format-hlsl
• version: 0.1.0
• license: MIT
• runtime: Node >=18, modern browsers
• module: ESM, package root exports CjsFormatHlsl

Install

npm install @carbonenginejs/format-hlsl

Public API

The package root exports one public class: CjsFormatHlsl. The Cjs prefix marks this as a CarbonEngineJS format/construction boundary, not an engine runtime class.

The public contract is data, not classes. CjsFormatHlsl exports no Tr2/effect model classes. The Tr2 container parser is internal machinery under src/core/tr2 (not part of this package's public surface — do not import from it). The documented JSON graph shape below is what callers should depend on.

import CjsFormatHlsl from "@carbonenginejs/format-hlsl";

const reader = new CjsFormatHlsl({
    emit: "json",              // "json" (default) | "raw"
    source: "myeffect.sm_hi",  // name used in error details
    permutation: null,         // null/default | Map | [{ name, value }]
    classes: {
        Root: CjsHlslRoot,
        Permutation: CjsHlslPermutation,
        EffectDescription: CjsHlslEffectDescription,
        Technique: CjsHlslTechnique,
        Pass: CjsHlslPass,
        StageInput: CjsHlslStageInput,
        Constant: CjsHlslConstant,
        Resource: CjsHlslResource,
        Sampler: CjsHlslSampler,
        ShaderBytecode: CjsHlslShaderBytecode,
    }
});

const json = reader.Read(bytes);
const summary = reader.Inspect(bytes);
const text = JSON.stringify(reader.ToJSON(json));

CjsFormatHlsl.isSupported(bytes);             // cheap header-only load check
CjsFormatHlsl.read(bytes, { emit: "raw" });   // internal Tr2EffectRes graph (unstable)
await CjsFormatHlsl.readFile("effect.sm_hi"); // Node-only convenience, same emit rules

The named export is the same class for callers that prefer named imports:

import { CjsFormatHlsl } from "@carbonenginejs/format-hlsl";

Reader Rules

• The package root exports one public format class: CjsFormatHlsl.
• Instance methods are PascalCase because reader instances can hydrate or sit beside CarbonClasses without colliding with camelCase data fields.
• Static one-shot methods are camelCase because they live on CjsFormatHlsl itself, not on hydrated CarbonClass instances.
• src/CjsFormatHlsl.js is the public format boundary. Parser machinery lives under src/core; transient CarbonEngine/library-shaped helpers live under src/carbon until they move to standalone core packages.
• Read / static read return JSON by default. emit: "raw" exposes the internal Tr2EffectRes graph for advanced callers and is not a stable schema.
• ToJSON / static toJSON converts format output to JSON-compatible data. It does not decode embedded shader bytecode and is not a writer.
• Shared schema, registries, hydration utilities, and decorators belong in the future @carbonenginejs/core-types package.

The JSON graph (emit: "json", the default)

Root
├─ version, compilerVersion, sourcePath, bodyCount, loadError
├─ permutations: Permutation[]        // every permutation axis in the header
└─ effect: EffectDescription | null   // the resolved permutation (see below), or null
              // when its compiled body could not be decoded
   ├─ version, effectName, annotations, readError
   └─ techniques: Technique[]
      └─ passes: Pass[]
         ├─ renderStates: {key, value}[]
         └─ stageInputs: (StageInput | null)[]   // indexed by shader stage
            ├─ constants: Constant[]
            ├─ resources / uavs: Resource[]
            ├─ samplers: Sampler[]
            ├─ signature: { pipelineInputs, registers, threadGroupSize }
            └─ bytecode: ShaderBytecode | null    // opaque bytes; hand to @carbonenginejs/format-dxbc

By default effect resolves the permutation's default option set (Carbon's own default-permutation rule). Pick a different one with the permutation option: CjsFormatHlsl.read(bytes, { permutation: [{ name: "BLEND_MODE", value: "TRANSPARENT" }] }) (also accepts a Map), forwarded to the same resolution Carbon's own Tr2EffectRes.GetShader uses.

emit: "raw"

Returns the internal Tr2EffectRes instance directly. This is unstable, not schema-guaranteed — it exists for callers who need to resolve more than one permutation from a single loaded effect (effect.GetShader(options)) without re-parsing. Prefer the JSON graph for anything you persist or feed into other packages.

Inspect(bytes)

A cheaper alternative to a full Read: header facts plus the resolved permutation's technique names, pass counts and per-pass active-stage counts, without building the full JSON graph.

Class hydration (classes option)

CjsFormatHlsl exports no model classes, but a caller can register constructors for specific node kinds in the JSON graph; matching nodes are instantiated with new and populated with that node's usual fields instead of a plain object literal:

import CjsFormatHlsl from "@carbonenginejs/format-hlsl";

CjsFormatHlsl.CLASS_KEYS;
// ["Root", "Permutation", "EffectDescription", "Technique", "Pass",
//  "StageInput", "Constant", "Resource", "Sampler", "ShaderBytecode"]

const result = CjsFormatHlsl.read(bytes, {
    classes: { Technique: MyTechnique, StageInput: MyStageInput }
});

// or on a reusable profile:
const reader = new CjsFormatHlsl();
reader.SetClass("Technique", MyTechnique);
reader.SetClasses({ StageInput: MyStageInput });
reader.HasClass("Technique");  // true
reader.GetClass("Technique");  // MyTechnique

This is a first-pass hydration surface covering the top-level effect graph. Nested detail with no dedicated class key yet (shader libraries, parameter annotations, pipeline-input/register signatures) is still emitted as plain, JSON-compatible data — see src/core/json.js for the exact shape.

Tests

npm test

Baseline tests are fully self-contained (synthetic effect bytes assembled in-test, plus binary-reader unit tests) — no game assets, network access or fixtures required. An optional corpus sweep parses every .sm_hi file found under the directory supplied by HLSL_CORPUS_DIR:

HLSL_CORPUS_DIR=path/to/effect.dx11 npm test

Last full sweep: 537 .sm_hi files, 593 permutation axes, 949 techniques decoded, zero failures.

License

MIT (see LICENSE and NOTICE).

This package contains no CarbonEngine or Fenris Creations (CCP Games) code. Its Tr2 container layout and data-shape model were reverse-engineered from compiled effect files, historical GLES shader assets, and observed CarbonEngine source-code structure. Those sources informed field names and layout hypotheses; the implementation is original CarbonEngineJS code.