incomplete

WebGPU Exposure Color Pipeline

This report separates published implementation state from accepted evidence. Every value below comes from the schema-v2 registry, the emitted source manifest, or promoted same-lab artifacts.

Open demo Owning skill Published source manifest Registry JSON Promoted evidence summary Canonical source

Lab id: webgpu-exposure-color-pipeline
Kind: Canonical Lab
Owning skill: Exposure And Color Grading
Execution: rendering
Three.js: 0.185.1
Source hash: sha256:6030ee02f228505590a3a9c61ed20a8fc2955e63d64396fe6c098d18e82a5759
Published bundle hash: sha256:2605f5d4486b07238824f651aff74a3c06d322241b2a9878c5516455513f445b
Build revision: sha256:6c7881ab73865696d689489de465e1cd67e1f2242d43641279abac777df0479b
Renderer: WebGPURenderer
Backend: WebGPUBackend
Evidence contract: v2
Tracked release bundle: Absent

Claim verdicts

mechanismCorrectnessINSUFFICIENT_EVIDENCE

performanceComplianceINSUFFICIENT_EVIDENCE

lifecycleStabilityINSUFFICIENT_EVIDENCE

Promoted same-lab media

WebGPU Exposure Color Pipeline: Final exposure, tone-map, LUT, and output-transform readback. — **Final exposure, tone-map, LUT, and output-transform readback.**inspected-runtime-evidence-preview · sha256:fe08f16a1076862bc019175eb990eef3ba275871605efc10d70cdb73c3802f42

WebGPU Exposure Color Pipeline: Weighted log-luminance meter source diagnostic. — **Weighted log-luminance meter source diagnostic.**inspected-runtime-evidence-preview · sha256:0b4b2630aaacd5c9439b988f3908a982ed9aadae9d133eb205523cd8df6c92d4

WebGPU Exposure Color Pipeline: Percentile-selection mask emitted by the histogram path; not a plotted histogram. — **Percentile-selection mask emitted by the histogram path; not a plotted histogram.**inspected-runtime-evidence-preview · sha256:e2e1431f129d4e83296185f43d3bfe6e9cb908bb616a0b43661c9e422b2fb8ad

WebGPU Exposure Color Pipeline: Metering-mask diagnostic. — **Metering-mask diagnostic.**inspected-runtime-evidence-preview · sha256:0ba25f69d6905f2c637ba7b09aa3f1ea39b2f87fa3f9314d3fc4c295c4b52092

WebGPU Exposure Color Pipeline: Tone-map stage diagnostic before the creative LUT. — **Tone-map stage diagnostic before the creative LUT.**inspected-runtime-evidence-preview · sha256:0be426a3713547e6469d4452988f0fed36f5a6a71a48dcde9b3c62ea4589dd33

WebGPU Exposure Color Pipeline: Creative LUT stage diagnostic. — **Creative LUT stage diagnostic.**inspected-runtime-evidence-preview · sha256:5f461c04d8de208879e522a3df53ad28a9952993d22e7a9f943f986700846a61

Required capability and runtime proof

Capabilities

native-webgpuincomplete

No capability evidence is recorded.

storage-buffersincomplete

No capability evidence is recorded.

storage-atomicsincomplete

required by full-histogram tier

Runtime proof

renderer-initincomplete

INSUFFICIENT_EVIDENCE

compute-readbackincomplete

INSUFFICIENT_EVIDENCE

current-adapter-timingincomplete

INSUFFICIENT_EVIDENCE

Capture state

Field	Published value
Primary route	`/demos/webgpu-exposure-color-pipeline/`
Cameras	`design`
Seeds	`0x00000001, 0x9e3779b9`
Modes	`final, meter-source, histogram, adaptation, meter-mask, tone-map, lut`
Capture time	`Not present in the promoted report data`
Adapter identity	`Not promoted`
Raw readback hashes	`Not present in the promoted preview summary`

Fixed routes

Kind	Id	Startup state	Status
scenario	`emitter`	`{"scenario":"emitter"}`	incomplete
scenario	`gray-card`	`{"scenario":"gray-card"}`	incomplete
scenario	`swatches`	`{"scenario":"swatches"}`	incomplete
scenario	`bright-window`	`{"scenario":"bright-window"}`	incomplete
scenario	`masked-ui`	`{"scenario":"masked-ui"}`	incomplete
mechanism	`log-luminance-reduction`	`{"tier":"balanced-log-reduction","mode":"meter-source","scenario":"emitter"}`	incomplete
mechanism	`histogram-and-percentiles`	`{"tier":"full-histogram","mode":"histogram","scenario":"emitter"}`	incomplete
mechanism	`adaptation`	`{"tier":"balanced-log-reduction","mode":"adaptation","scenario":"bright-window"}`	incomplete
mechanism	`metering-masks`	`{"tier":"full-histogram","mode":"meter-mask","scenario":"masked-ui"}`	incomplete
mechanism	`tone-mapping`	`{"tier":"balanced-log-reduction","mode":"tone-map","scenario":"swatches"}`	incomplete
mechanism	`lut-grading`	`{"tier":"full-histogram","mode":"lut","scenario":"swatches"}`	incomplete
tier	`full-histogram`	`{"tier":"full-histogram"}`	incomplete
tier	`balanced-log-reduction`	`{"tier":"balanced-log-reduction"}`	incomplete
tier	`minimum-fixed-shot`	`{"tier":"minimum-fixed-shot"}`	incomplete

Locked tier contracts

full-histogram · incomplete

{
  "targetClass": "current-adapter correctness",
  "frameTargetMs": null,
  "resolutionPolicy": {
    "meterGrid": [
      64,
      36
    ],
    "lutEdge": 32
  },
  "mechanismLimits": {
    "meter": "histogram-percentile",
    "histogramBins": 64
  },
  "resourceLimits": {
    "storageBytes": 872
  },
  "degradationFromPrevious": [],
  "preservedInvariants": [
    "GPU EV ownership",
    "single tone map",
    "single output transform"
  ]
}

balanced-log-reduction · incomplete

{
  "targetClass": "current-adapter correctness",
  "frameTargetMs": null,
  "resolutionPolicy": {
    "meterGrid": [
      64,
      36
    ],
    "lutEdge": 32
  },
  "mechanismLimits": {
    "meter": "weighted-log"
  },
  "resourceLimits": {
    "storageBytes": 320
  },
  "degradationFromPrevious": [
    "remove histogram clear/bin/prefix/percentile dispatches"
  ],
  "preservedInvariants": [
    "GPU EV ownership",
    "single tone map",
    "single output transform"
  ]
}

minimum-fixed-shot · incomplete

{
  "targetClass": "controlled shot",
  "frameTargetMs": null,
  "resolutionPolicy": {
    "meterGrid": null,
    "lutEdge": 32
  },
  "mechanismLimits": {
    "meter": "fixed-shot"
  },
  "resourceLimits": {
    "storageBytes": 320
  },
  "degradationFromPrevious": [
    "disable meter updates",
    "retain authored fixed EV"
  ],
  "preservedInvariants": [
    "single tone map",
    "single output transform"
  ]
}

Limitations

The correctness bundle records a native r185 WebGPU backend, but named-adapter timestamp evidence is absent.
The promoted percentile frame is a selection mask, not proof that histogram bin totals, prefix scan, or f64 oracle parity pass.
Lifecycle stability remains unaccepted.