{
  "version": "1.2.0",
  "description": "SDK reference vectors for canonical image pixel-density validation. Format dimensions are logical render pixels; image asset dimensions are intrinsic pixels. When pixel_ratios is absent the accepted set is [1]. When top-level and slot pixel_ratios are both present, the effective set is their intersection and an empty intersection is invalid. One asset satisfying one effective ratio is sufficient unless an image slot declares required_pixel_ratios, in which case its rendition array must cover every required density exactly once.",
  "vectors": [
    {
      "id": "backward-compatible-1x",
      "params": { "width": 300, "height": 250 },
      "asset": { "width": 300, "height": 250 },
      "expected": { "valid": true, "pixel_ratio": 1, "logical_width": 300, "logical_height": 250 }
    },
    {
      "id": "2x-rejected-when-density-is-undeclared",
      "params": { "width": 300, "height": 250 },
      "asset": { "width": 600, "height": 500 },
      "expected": { "valid": false, "violation": "image_dimensions_not_accepted" }
    },
    {
      "id": "explicit-2x-retina",
      "params": { "width": 300, "height": 250, "pixel_ratios": [2] },
      "asset": { "width": 600, "height": 500, "pixel_ratio": 2 },
      "expected": { "valid": true, "pixel_ratio": 2, "logical_width": 300, "logical_height": 250 }
    },
    {
      "id": "infer-2x-from-intrinsic-dimensions",
      "params": { "width": 300, "height": 250, "pixel_ratios": [2] },
      "asset": { "width": 600, "height": 500 },
      "expected": { "valid": true, "pixel_ratio": 2, "logical_width": 300, "logical_height": 250 }
    },
    {
      "id": "accepted-density-set-chooses-1x",
      "params": { "width": 300, "height": 250, "pixel_ratios": [1, 2] },
      "asset": { "width": 300, "height": 250 },
      "expected": { "valid": true, "pixel_ratio": 1, "logical_width": 300, "logical_height": 250 }
    },
    {
      "id": "accepted-density-set-chooses-2x",
      "params": { "width": 300, "height": 250, "pixel_ratios": [1, 2] },
      "asset": { "width": 600, "height": 500 },
      "expected": { "valid": true, "pixel_ratio": 2, "logical_width": 300, "logical_height": 250 }
    },
    {
      "id": "density-not-in-accepted-set",
      "params": { "width": 300, "height": 250, "pixel_ratios": [2] },
      "asset": { "width": 300, "height": 250, "pixel_ratio": 1 },
      "expected": { "valid": false, "violation": "pixel_ratio_not_accepted" }
    },
    {
      "id": "declared-density-disagrees-with-intrinsic-dimensions",
      "params": { "width": 300, "height": 250, "pixel_ratios": [1, 2] },
      "asset": { "width": 600, "height": 500, "pixel_ratio": 1 },
      "expected": { "valid": false, "violation": "pixel_ratio_metadata_mismatch" }
    },
    {
      "id": "width-and-height-must-scale-uniformly",
      "params": { "width": 300, "height": 250, "pixel_ratios": [2] },
      "asset": { "width": 600, "height": 250 },
      "expected": { "valid": false, "violation": "pixel_ratio_dimension_mismatch" }
    },
    {
      "id": "multi-size-and-density-are-independent-axes",
      "params": {
        "sizes": [
          { "width": 300, "height": 250 },
          { "width": 728, "height": 90 }
        ],
        "pixel_ratios": [2]
      },
      "asset": { "width": 1456, "height": 180 },
      "expected": { "valid": true, "pixel_ratio": 2, "logical_width": 728, "logical_height": 90 }
    },
    {
      "id": "retina-intrinsic-size-is-not-a-logical-size",
      "params": {
        "sizes": [
          { "width": 300, "height": 250 },
          { "width": 600, "height": 500 }
        ],
        "pixel_ratios": [2]
      },
      "asset": { "width": 600, "height": 500 },
      "expected": { "valid": true, "pixel_ratio": 2, "logical_width": 300, "logical_height": 250 }
    },
    {
      "id": "fractional-1-5x-density",
      "params": { "width": 300, "height": 250, "pixel_ratios": [1.5] },
      "asset": { "width": 450, "height": 375 },
      "expected": { "valid": true, "pixel_ratio": 1.5, "logical_width": 300, "logical_height": 250 }
    },
    {
      "id": "responsive-range-2x",
      "params": { "min_width": 300, "max_width": 500, "min_height": 200, "max_height": 300, "pixel_ratios": [2] },
      "asset": { "width": 800, "height": 500 },
      "expected": { "valid": true, "pixel_ratio": 2, "logical_width": 400, "logical_height": 250 }
    },
    {
      "id": "unconstrained-image-remains-backward-compatible-1x",
      "params": {},
      "asset": { "width": 600, "height": 500 },
      "expected": { "valid": true, "pixel_ratio": 1, "logical_width": 600, "logical_height": 500 }
    },
    {
      "id": "ambiguous-size-and-density-requires-asset-metadata",
      "params": {
        "sizes": [
          { "width": 300, "height": 250 },
          { "width": 600, "height": 500 }
        ],
        "pixel_ratios": [1, 2]
      },
      "asset": { "width": 600, "height": 500 },
      "expected": { "valid": false, "violation": "pixel_ratio_ambiguous" }
    },
    {
      "id": "asset-metadata-resolves-size-and-density-ambiguity",
      "params": {
        "sizes": [
          { "width": 300, "height": 250 },
          { "width": 600, "height": 500 }
        ],
        "pixel_ratios": [1, 2]
      },
      "asset": { "width": 600, "height": 500, "pixel_ratio": 2 },
      "expected": { "valid": true, "pixel_ratio": 2, "logical_width": 300, "logical_height": 250 }
    },
    {
      "id": "density-only-requires-explicit-asset-metadata",
      "params": { "pixel_ratios": [2] },
      "asset": { "width": 600, "height": 500 },
      "expected": { "valid": false, "violation": "pixel_ratio_not_inferable" }
    },
    {
      "id": "density-only-with-explicit-asset-metadata",
      "params": { "pixel_ratios": [2] },
      "asset": { "width": 600, "height": 500, "pixel_ratio": 2 },
      "expected": { "valid": true, "pixel_ratio": 2, "logical_width": 300, "logical_height": 250 }
    },
    {
      "id": "non-empty-top-level-and-slot-intersection",
      "params": { "width": 300, "height": 250, "pixel_ratios": [1, 2] },
      "slot": { "pixel_ratios": [2, 3], "required_pixel_ratios": [2] },
      "assets": [
        { "width": 600, "height": 500, "pixel_ratio": 2 }
      ],
      "expected": { "valid": true, "pixel_ratios": [2] }
    },
    {
      "id": "empty-top-level-and-slot-intersection-is-invalid",
      "params": { "width": 300, "height": 250, "pixel_ratios": [1] },
      "slot": { "pixel_ratios": [2] },
      "asset": { "width": 600, "height": 500, "pixel_ratio": 2 },
      "expected": { "valid": false, "violation": "pixel_ratio_intersection_empty" }
    },
    {
      "id": "required-ratio-excluded-by-top-level-acceptance",
      "params": { "width": 300, "height": 250, "pixel_ratios": [1] },
      "slot": { "pixel_ratios": [1, 2], "required_pixel_ratios": [1, 2] },
      "assets": [
        { "width": 300, "height": 250, "pixel_ratio": 1 },
        { "width": 600, "height": 500, "pixel_ratio": 2 }
      ],
      "expected": { "valid": false, "violation": "required_pixel_ratio_not_accepted", "pixel_ratio": 2 }
    },
    {
      "id": "single-asset-slot-narrows-acceptance-without-required-ratios",
      "params": { "width": 300, "height": 250, "pixel_ratios": [1, 2] },
      "slot": { "pixel_ratios": [2] },
      "asset": { "width": 600, "height": 500, "pixel_ratio": 2 },
      "expected": { "valid": true, "pixel_ratio": 2, "logical_width": 300, "logical_height": 250 }
    },
    {
      "id": "single-asset-slot-rejects-top-level-ratio-excluded-by-narrowing",
      "params": { "width": 300, "height": 250, "pixel_ratios": [1, 2] },
      "slot": { "pixel_ratios": [2] },
      "asset": { "width": 300, "height": 250, "pixel_ratio": 1 },
      "expected": { "valid": false, "violation": "pixel_ratio_not_accepted" }
    },
    {
      "id": "gam-required-1x-and-2x-renditions",
      "params": { "width": 300, "height": 250 },
      "slot": { "pixel_ratios": [1, 2], "required_pixel_ratios": [1, 2] },
      "assets": [
        { "width": 300, "height": 250, "pixel_ratio": 1 },
        { "width": 600, "height": 500, "pixel_ratio": 2 }
      ],
      "expected": { "valid": true, "pixel_ratios": [1, 2] }
    },
    {
      "id": "gam-rejects-retina-only-rendition",
      "params": { "width": 300, "height": 250 },
      "slot": { "pixel_ratios": [1, 2], "required_pixel_ratios": [1, 2] },
      "assets": [
        { "width": 600, "height": 500, "pixel_ratio": 2 }
      ],
      "expected": { "valid": false, "violation": "required_pixel_ratio_missing", "pixel_ratio": 1 }
    },
    {
      "id": "optional-1-5x-rendition-may-be-omitted",
      "params": { "width": 300, "height": 250 },
      "slot": { "pixel_ratios": [1, 1.5, 2], "required_pixel_ratios": [1, 2] },
      "assets": [
        { "width": 300, "height": 250, "pixel_ratio": 1 },
        { "width": 600, "height": 500, "pixel_ratio": 2 }
      ],
      "expected": { "valid": true, "pixel_ratios": [1, 2] }
    },
    {
      "id": "optional-1-5x-rendition-may-be-supplied",
      "params": { "width": 300, "height": 250 },
      "slot": { "pixel_ratios": [1, 1.5, 2], "required_pixel_ratios": [1, 2] },
      "assets": [
        { "width": 300, "height": 250, "pixel_ratio": 1 },
        { "width": 450, "height": 375, "pixel_ratio": 1.5 },
        { "width": 600, "height": 500, "pixel_ratio": 2 }
      ],
      "expected": { "valid": true, "pixel_ratios": [1, 1.5, 2] }
    },
    {
      "id": "duplicate-density-rendition-is-rejected",
      "params": { "width": 300, "height": 250 },
      "slot": { "pixel_ratios": [1, 2], "required_pixel_ratios": [1, 2] },
      "assets": [
        { "width": 300, "height": 250, "pixel_ratio": 1 },
        { "width": 300, "height": 250, "pixel_ratio": 1 },
        { "width": 600, "height": 500, "pixel_ratio": 2 }
      ],
      "expected": { "valid": false, "violation": "pixel_ratio_duplicate", "pixel_ratio": 1 }
    },
    {
      "id": "required-density-must-be-accepted",
      "params": { "width": 300, "height": 250 },
      "slot": { "pixel_ratios": [1], "required_pixel_ratios": [1, 2] },
      "assets": [
        { "width": 300, "height": 250, "pixel_ratio": 1 }
      ],
      "expected": { "valid": false, "violation": "required_pixel_ratio_not_accepted", "pixel_ratio": 2 }
    }
  ],
  "legacy_projection_vectors": [
    {
      "id": "parameterized-display-image-2x",
      "format_id": {
        "agent_url": "https://creative.adcontextprotocol.org",
        "id": "display_image",
        "width": 300,
        "height": 250,
        "pixel_ratio": 2
      },
      "expected": {
        "format_kind": "image",
        "params": { "width": 300, "height": 250, "pixel_ratios": [2] }
      }
    },
    {
      "id": "parameterized-display-image-defaults-to-1x",
      "format_id": {
        "agent_url": "https://creative.adcontextprotocol.org",
        "id": "display_image",
        "width": 300,
        "height": 250
      },
      "expected": {
        "format_kind": "image",
        "params": { "width": 300, "height": 250 }
      }
    }
  ]
}