Add stroke texture PNG, SVG, and PDF export

Reuse colour artwork serializers and record source hashes. Verified single and multiview exports plus targeted tests.

README.md

@@ -227,11 +227,12 @@ blender -b sensors/finger/r01/source/geometry.blend -P blender/scripts/random_pa
   --vector-width-mm 164 --vector-height-mm 160
 ```
 
-`binary-preview` makes Random Stroke Pattern (RSP) PNG trials from a color job
-in a separate directory; `--views` selects the multiview job. Stroke width
-follows camera-cell print size, bounded to 0.11–0.28 mm. These image-space
-trials are for probe comparisons, not print masters; UV views may select
-different cells. See `binary-preview --help` for paths and sizing controls.
+`stroke-texture` exports Random Stroke Pattern (RSP) PNG/SVG/PDF and a hash
+manifest from existing color artwork, for example:
+`orisys-design stroke-texture sensors/finger/r01 --views`. Outputs go to a
+`strokes` subdirectory; `--output-dir` selects another. `binary-preview`
+remains PNG-only. Nominal stroke width is 0.11–0.28 mm; verify vectors and
+printed dimensions before manufacturing.
 
 ## Inspect printability (advisory)
 

blender/scripts/random_patch_dd02c.py

@@ -93,8 +93,6 @@ def fill_polygon(image, pixels, width, height, polygon, color):
     poly = [(int(round(x)), int(round(y))) for x, y in polygon]
     if len(poly) < 3:
         return
-    min_x = max(0, min(p[0] for p in poly))
-    max_x = min(width-1, max(p[0] for p in poly))
     min_y = max(0, min(p[1] for p in poly))
     max_y = min(height-1, max(p[1] for p in poly))
     for y in range(min_y, max_y + 1):
@@ -125,8 +123,6 @@ def fill_polygon_value(grid, width, height, polygon, value):
     poly = [(int(round(x)), int(round(y))) for x, y in polygon]
     if len(poly) < 3:
         return
-    min_x = max(0, min(p[0] for p in poly))
-    max_x = min(width - 1, max(p[0] for p in poly))
     min_y = max(0, min(p[1] for p in poly))
     max_y = min(height - 1, max(p[1] for p in poly))
     for y in range(min_y, max_y + 1):
@@ -679,10 +675,19 @@ def _clipped_shapes(shapes, width, height):
     return clipped
 
 
+def save_png_image(image, output_path):
+    """Serialize an already-rasterized Blender image as PNG."""
+    path = Path(output_path)
+    path.parent.mkdir(parents=True, exist_ok=True)
+    image.filepath_raw = str(path)
+    image.file_format = 'PNG'
+    image.save()
+
+
 def write_svg_vector(
     output_path, texture_width, texture_height, width_mm, height_mm,
     mesh_polygons, patch_shapes, cross_rects, cross_color, uv_map,
-    background=None,
+    background=None, artwork_label="patch",
 ):
     """Write editable grouped SVG geometry; no raster data is embedded.
 
@@ -696,6 +701,9 @@ def write_svg_vector(
         background_fill = "#" + "".join(
             f"{round(_clamp_channel(channel) * 255):02x}" for channel in background[:3]
         )
+    if artwork_label not in ("patch", "stroke"):
+        raise ValueError(f"unsupported artwork label: {artwork_label!r}")
+    plural = "patches" if artwork_label == "patch" else "strokes"
     lines = [
         '<?xml version="1.0" encoding="UTF-8"?>',
         (
@@ -705,10 +713,10 @@ def write_svg_vector(
             f'viewBox="0 0 {texture_width} {texture_height}" '
             f'preserveAspectRatio="none">'
         ),
-        f"  <title>Orisys patch texture — {_xml_escape(uv_map)} UV map</title>",
+        f"  <title>Orisys {artwork_label} texture — {_xml_escape(uv_map)} UV map</title>",
         (
             "  <desc>Native vector geometry grouped as background, mesh, "
-            "camera-space patches, and reference cross.</desc>"
+            f"camera-space {plural}, and reference cross.</desc>"
         ),
         (
             f'  <g id="artwork" transform="translate(0 {texture_height}) scale(1 -1)">'
@@ -728,10 +736,10 @@ def write_svg_vector(
                 f"mesh-face-{index:04d}", polygon, (1.0, 1.0, 1.0, 1.0)
             )
         )
-    lines.extend(["    </g>", '    <g id="patches">'])
+    lines.extend(["    </g>", f'    <g id="{plural}">'])
     for index, (polygon, color) in enumerate(patch_shapes, start=1):
         lines.append(
-            _svg_polygon_element(f"patch-{index:04d}", polygon, color)
+            _svg_polygon_element(f"{artwork_label}-{index:04d}", polygon, color)
         )
     lines.extend(["    </g>", '    <g id="reference-cross">'])
     cross_attributes = _svg_fill_attributes(cross_color)
@@ -798,7 +806,7 @@ def _build_pdf(objects):
 def write_pdf_vector(
     output_path, texture_width, texture_height, width_mm, height_mm,
     mesh_polygons, patch_shapes, cross_rects, cross_color,
-    background=None,
+    background=None, artwork_label="patch",
 ):
     """Write native vector PDF paths at the configured physical page size.
 
@@ -824,7 +832,9 @@ def write_pdf_vector(
     for polygon in mesh_polygons:
         content.extend(_pdf_polygon_commands(polygon, scale_x, scale_y))
 
-    content.append("% camera-space patches")
+    if artwork_label not in ("patch", "stroke"):
+        raise ValueError(f"unsupported artwork label: {artwork_label!r}")
+    content.append(f"% camera-space {'patches' if artwork_label == 'patch' else 'strokes'}")
     for polygon, color in patch_shapes:
         content.append(_pdf_set_fill(color))
         content.extend(_pdf_polygon_commands(polygon, scale_x, scale_y))
@@ -961,10 +971,7 @@ def generate_patch_texture(
     image.pixels[:] = pixels
     image.update()
     out_path = Path(output_path)
-    out_path.parent.mkdir(parents=True, exist_ok=True)
-    image.filepath_raw = str(out_path)
-    image.file_format = 'PNG'
-    image.save()
+    save_png_image(image, out_path)
     print(f"PNG raster texture saved to {out_path}")
 
     uv_map_name = uv_layer.name if uv_layer is not None else "active"

blender/scripts/random_stroke_pattern.py

@@ -1,4 +1,4 @@
-"""Generate Random Stroke Pattern (RSP) trials from colour texture jobs.
+"""Generate Random Stroke Pattern (RSP) artwork from colour texture jobs.
 
 Run after the colour texture command has produced its PNGs::
 
@@ -23,7 +23,8 @@ gradient: 0.11–0.16 mm width and 0.24–0.38 mm length, edge to centre. These
 nominal print-page sizes; clipped/merged ink still needs physical validation.
 The camera-compensated trial scales width from each camera cell's print-page
 footprint, bounded to 0.11–0.28 mm; larger far-field cells therefore receive
-larger marks. It remains a preview because image-space regions can be distorted.
+larger marks. The PNG and native SVG/PDF share accepted capsule geometry, but
+image-space regions can be distorted. Verify dimensions before manufacturing.
 """
 
 from __future__ import annotations
@@ -33,11 +34,17 @@ import hashlib
 import json
 import math
 import sys
+import xml.etree.ElementTree as ET
 from pathlib import Path
 
 import bpy
 import numpy as np
 
+script_dir = str(Path(__file__).resolve().parent)
+if script_dir not in sys.path:
+    sys.path.insert(0, script_dir)
+from random_patch_dd02c import save_png_image, write_pdf_vector, write_svg_vector  # noqa: E402 - Blender omits the script directory from sys.path
+
 PHYSICAL_WIDTH_MM = {"width_0p1mm": 0.1, "width_0p12mm": 0.12, "width_0p2mm": 0.2}
 MODES = (
     "dots",
@@ -72,6 +79,14 @@ def parse_args(argv: list[str]) -> argparse.Namespace:
         default=0.5,
         help="Compensated stroke width as a fraction of the local print-cell span",
     )
+    parser.add_argument(
+        "--formats", nargs="+", choices=("png", "svg", "pdf"), default=("png",)
+    )
+    parser.add_argument(
+        "--artifact-prefix",
+        default=None,
+        help="Name single-mode outputs <prefix>_<source-id>.<format>",
+    )
     return parser.parse_args(argv)
 
 
@@ -189,6 +204,26 @@ def camera_compensated_size(
     return width_mm, 2.4 * width_mm
 
 
+def capsule_polygon(
+    centre_x: float, centre_y: float, radius: float, half_length: float, angle: float
+) -> list[tuple[float, float]]:
+    """Approximate the raster capsule boundary for native vector output."""
+    points = []
+    cosine, sine = math.cos(angle), math.sin(angle)
+    for side, start in ((1, -math.pi / 2), (-1, math.pi / 2)):
+        for index in range(25):
+            theta = start + index * math.pi / 24
+            local_x = side * half_length + radius * math.cos(theta)
+            local_y = radius * math.sin(theta)
+            points.append(
+                (
+                    centre_x + local_x * cosine - local_y * sine,
+                    centre_y + local_x * sine + local_y * cosine,
+                )
+            )
+    return points
+
+
 def draw_mark(
     canvas: np.ndarray,
     region,
@@ -199,6 +234,7 @@ def draw_mark(
     camera_cell: tuple[int, int] | None = None,
     grid_shape: tuple[int, int] | None = None,
     camera_width_fraction: float = 0.5,
+    vector_shapes: list | None = None,
 ) -> float:
     colour, cell_x, cell_y, width, height = region
     rgb = ((colour >> 16) & 255, (colour >> 8) & 255, colour & 255)
@@ -293,6 +329,13 @@ def draw_mark(
             if (existing + added) / local_area > 0.45:
                 return 0.0
     canvas[y0:y1, x0:x1] |= footprint
+    if vector_shapes is not None:
+        vector_shapes.append(
+            (
+                capsule_polygon(centre_x, centre_y, radius, half_length, angle),
+                (0.0, 0.0, 0.0, 1.0),
+            )
+        )
     return 2 * radius
 
 
@@ -305,14 +348,14 @@ def write_binary_png(path: Path, marks: np.ndarray, surface: np.ndarray) -> None
     try:
         image.pixels.foreach_set(rgba.ravel())
         image.update()
-        image.filepath_raw = str(path)
-        image.file_format = "PNG"
-        image.save()
+        save_png_image(image, path)
     finally:
         bpy.data.images.remove(image)
 
 
-def job_sources(job: dict) -> tuple[list[tuple[str, Path, int | None]], float]:
+def job_sources(
+    job: dict,
+) -> tuple[list[tuple[str, Path, Path | None, int | None]], float]:
     """Resolve source PNGs and physical scale from a colour texture job."""
     settings = job.get("settings") or {}
     schema = job.get("schema")
@@ -325,7 +368,14 @@ def job_sources(job: dict) -> tuple[list[tuple[str, Path, int | None]], float]:
             raise ValueError("multiview preview requires auto-sized pages")
         px_per_mm = float(page.get("px_per_mm", 0))
         sources = [
-            (entry["id"], Path(entry["artifacts"]["png"]), entry.get("seed"))
+            (
+                entry["id"],
+                Path(entry["artifacts"]["png"]),
+                Path(entry["artifacts"]["svg"])
+                if entry["artifacts"].get("svg")
+                else None,
+                entry.get("seed"),
+            )
             for entry in entries
         ]
     elif schema == "orisys-sensor-design/texture-job-v3":
@@ -344,19 +394,75 @@ def job_sources(job: dict) -> tuple[list[tuple[str, Path, int | None]], float]:
                 "single-view page has unequal horizontal and vertical scales"
             )
         sources = [
-            (entry["uv_map"], Path(entry["artifacts"]["png"]), settings.get("seed"))
+            (
+                entry["uv_map"],
+                Path(entry["artifacts"]["png"]),
+                Path(entry["artifacts"]["svg"])
+                if entry["artifacts"].get("svg")
+                else None,
+                settings.get("seed"),
+            )
             for entry in entries
         ]
     else:
         raise ValueError(f"unsupported colour texture job schema: {schema!r}")
     if not sources or not math.isfinite(px_per_mm) or px_per_mm <= 0:
         raise ValueError("colour texture job needs source PNGs and positive px_per_mm")
-    for _, source, _ in sources:
+    for source_id, source, _svg, _seed in sources:
+        if not source_id or not all(
+            char.isalnum() or char in "_-" for char in source_id
+        ):
+            raise ValueError(f"unsafe source ID: {source_id!r}")
         if not source.is_file():
             raise FileNotFoundError(f"run the colour generator first: {source}")
     return sources, px_per_mm
 
 
+def source_mesh_polygons(
+    svg_path: Path | None, width: int, height: int, px_per_mm: float
+) -> tuple[list[list[tuple[float, float]]], float, float]:
+    """Read the source artwork's owned white ground and physical page size."""
+    if svg_path is None or not svg_path.is_file():
+        raise FileNotFoundError(
+            f"source colour SVG is required for vectors: {svg_path}"
+        )
+    root = ET.parse(svg_path).getroot()
+    width_mm = float(root.attrib["width"].removesuffix("mm"))
+    height_mm = float(root.attrib["height"].removesuffix("mm"))
+    view_box = [float(value) for value in root.attrib["viewBox"].split()]
+    if (
+        len(view_box) != 4
+        or view_box[:2] != [0.0, 0.0]
+        or view_box[2:] != [float(width), float(height)]
+        or not math.isfinite(width_mm)
+        or not math.isfinite(height_mm)
+        or width_mm <= 0
+        or height_mm <= 0
+        or not math.isclose(width / width_mm, px_per_mm, rel_tol=0.002)
+        or not math.isclose(height / height_mm, px_per_mm, rel_tol=0.002)
+    ):
+        raise ValueError(f"source SVG page does not match colour PNG/job: {svg_path}")
+    namespace = {"svg": "http://www.w3.org/2000/svg"}
+    mesh = root.find(".//svg:g[@id='mesh']", namespace)
+    if mesh is None:
+        raise ValueError(f"source SVG has no owned mesh group: {svg_path}")
+    polygons = []
+    for element in mesh.findall("svg:polygon", namespace):
+        polygon = [
+            tuple(float(value) for value in point.split(","))
+            for point in element.attrib["points"].split()
+        ]
+        if len(polygon) >= 3:
+            polygons.append(polygon)
+    if not polygons:
+        raise ValueError(f"source SVG has no owned mesh polygons: {svg_path}")
+    return polygons, width_mm, height_mm
+
+
+def artifact_stem(source_id: str, mode: str, prefix: str | None) -> str:
+    return f"{prefix}_{source_id}" if prefix else f"{source_id}_{mode}"
+
+
 def run(
     job_path: Path,
     output_dir: Path,
@@ -364,21 +470,37 @@ def run(
     minimum: int,
     modes: tuple[str, ...],
     camera_width_fraction: float,
+    formats: tuple[str, ...] = ("png",),
+    artifact_prefix: str | None = None,
 ) -> None:
     job = json.loads(job_path.read_text(encoding="utf-8"))
     sources, px_per_mm = job_sources(job)
+    if artifact_prefix is not None and (
+        len(modes) != 1
+        or not artifact_prefix
+        or not all(char.isalnum() or char in "_-" for char in artifact_prefix)
+    ):
+        raise ValueError("artifact prefix requires one mode and a filename-safe prefix")
+    if not formats or len(formats) != len(set(formats)):
+        raise ValueError("formats must be non-empty and distinct")
     targets = [
-        output_dir / f"{source_id}_{mode}.png"
-        for source_id, _, _ in sources
+        output_dir / f"{artifact_stem(source_id, mode, artifact_prefix)}.{fmt}"
+        for source_id, _, _, _ in sources
         for mode in modes
+        for fmt in formats
     ]
     for target in targets:
         if target.exists():
             raise FileExistsError(f"refusing to overwrite {target}")
     output_dir.mkdir(parents=True, exist_ok=True)
     settings = job.get("settings", {})
-    for source_id, source, source_seed in sources:
+    for source_id, source, source_svg, source_seed in sources:
         rgb, width, height = read_rgb(source)
+        vector_page = (
+            source_mesh_polygons(source_svg, width, height, px_per_mm)
+            if "svg" in formats or "pdf" in formats
+            else None
+        )
         surface = np.any(rgb != 0, axis=2)
         patterned = surface & np.any(rgb != 255, axis=2)
         regions = list(cell_regions(rgb, minimum))
@@ -426,6 +548,7 @@ def run(
                 )
         for mode in modes:
             marks = np.zeros((height, width), dtype=bool)
+            vector_shapes = [] if vector_page is not None else None
             limit = (
                 patterned
                 if mode
@@ -456,11 +579,42 @@ def run(
                     else None,
                     grid_shape=grid_shape,
                     camera_width_fraction=camera_width_fraction,
+                    vector_shapes=vector_shapes,
                 )
                 for region in mode_regions
             ]
-            target = output_dir / f"{source_id}_{mode}.png"
-            write_binary_png(target, marks, surface)
+            stem = artifact_stem(source_id, mode, artifact_prefix)
+            if "png" in formats:
+                write_binary_png(output_dir / f"{stem}.png", marks, surface)
+            if vector_page is not None:
+                mesh_polygons, width_mm, height_mm = vector_page
+                if "svg" in formats:
+                    write_svg_vector(
+                        output_dir / f"{stem}.svg",
+                        width,
+                        height,
+                        width_mm,
+                        height_mm,
+                        mesh_polygons,
+                        vector_shapes,
+                        [],
+                        (0.0, 0.0, 0.0, 1.0),
+                        source_id,
+                        artwork_label="stroke",
+                    )
+                if "pdf" in formats:
+                    write_pdf_vector(
+                        output_dir / f"{stem}.pdf",
+                        width,
+                        height,
+                        width_mm,
+                        height_mm,
+                        mesh_polygons,
+                        vector_shapes,
+                        [],
+                        (0.0, 0.0, 0.0, 1.0),
+                        artwork_label="stroke",
+                    )
             accepted = [diameter for diameter in diameters if diameter > 0]
             median_width = float(np.median(accepted)) if accepted else 0.0
             physical_width = (
@@ -480,7 +634,7 @@ def run(
             print(
                 f"{source_id}: {mode}, {len(accepted)}/{len(mode_regions)} marks, "
                 f"black coverage {coverage:.1%}, median mark width "
-                f"{median_width:.1f} px{physical_width}{width_range} -> {target}",
+                f"{median_width:.1f} px{physical_width}{width_range} -> {stem}",
                 flush=True,
             )
 
@@ -499,6 +653,8 @@ def main() -> int:
         args.min_cell_pixels,
         tuple(args.modes),
         args.camera_width_fraction,
+        tuple(args.formats),
+        args.artifact_prefix,
     )
     return 0
 

src/orisys_sensor_design/cli.py

@@ -22,6 +22,7 @@ from orisys_sensor_design.manifest import (
     export_revision_dir,
     load_profile,
     repo_root,
+    sha256_file,
     validate_revision_metadata,
     write_export_job,
     write_manifest,
@@ -470,26 +471,13 @@ def cmd_texture(revision_dir: Path, args: argparse.Namespace) -> int:
     return 0
 
 
-def cmd_binary_preview(revision_dir: Path, args: argparse.Namespace) -> int:
-    """Convert existing colour textures to a bounded binary camera-footprint trial."""
-    root = repo_root(revision_dir)
-    paths = RevisionPaths.from_revision_dir(revision_dir)
-    errors = validate_revision_metadata(paths)
-    if errors:
-        for message in errors:
-            print(f"ERROR: {message}", file=sys.stderr)
-        return 1
-
-    if not math.isfinite(args.camera_width_fraction) or args.camera_width_fraction <= 0:
-        print("ERROR: --camera-width-fraction must be finite and positive", file=sys.stderr)
-        return 2
+def _stroke_source_job(paths: RevisionPaths, root: Path, args: argparse.Namespace):
+    """Validate the existing colour job shared by stroke preview and export."""
     texture_dir = resolve_texture_output_dir(root, paths, None)
     job_name = "_texture_views_job.json" if args.views else "_texture_job.json"
     job_path = (args.source_job or texture_dir / job_name).resolve()
     if not job_path.is_file():
-        print(f"ERROR: colour texture job missing: {job_path}", file=sys.stderr)
-        return 3
-    try:
+        raise FileNotFoundError(f"colour texture job missing: {job_path}")
     job = json.loads(job_path.read_text(encoding="utf-8"))
     expected_schema = (
         "orisys-sensor-design/texture-job-multiview-v1"
@@ -508,9 +496,37 @@ def cmd_binary_preview(revision_dir: Path, args: argparse.Namespace) -> int:
                 char.isalnum() or char in "_-" for char in source_id
             ) for source_id in source_ids)):
         raise ValueError("source job needs distinct, filename-safe output IDs")
+    return job_path, job, entries, source_ids
+
+
+def _stroke_cli_context(revision_dir: Path, args: argparse.Namespace):
+    root = repo_root(revision_dir)
+    paths = RevisionPaths.from_revision_dir(revision_dir)
+    errors = validate_revision_metadata(paths)
+    if errors:
+        for message in errors:
+            print(f"ERROR: {message}", file=sys.stderr)
+        return None, 1
+    if not math.isfinite(args.camera_width_fraction) or args.camera_width_fraction <= 0:
+        print("ERROR: --camera-width-fraction must be finite and positive", file=sys.stderr)
+        return None, 2
+    try:
+        source = _stroke_source_job(paths, root, args)
+    except FileNotFoundError as exc:
+        print(f"ERROR: {exc}", file=sys.stderr)
+        return None, 3
     except (OSError, ValueError, KeyError, TypeError) as exc:
-        print(f"ERROR: invalid colour texture job {job_path}: {exc}", file=sys.stderr)
-        return 2
+        print(f"ERROR: invalid colour texture job: {exc}", file=sys.stderr)
+        return None, 2
+    return (paths, *source), 0
+
+
+def cmd_binary_preview(revision_dir: Path, args: argparse.Namespace) -> int:
+    """Convert existing colour textures to a bounded binary camera-footprint trial."""
+    context, code = _stroke_cli_context(revision_dir, args)
+    if context is None:
+        return code
+    paths, job_path, _job, _entries, source_ids = context
 
     output_dir = (args.output_dir or job_path.parent / "binary-preview").resolve()
     targets = [output_dir / f"{source_id}_camera_compensated_width.png"
@@ -541,6 +557,85 @@ def cmd_binary_preview(revision_dir: Path, args: argparse.Namespace) -> int:
     return 0
 
 
+def cmd_stroke_texture(revision_dir: Path, args: argparse.Namespace) -> int:
+    """Export one PNG/SVG/PDF stroke set per colour source and record provenance."""
+    context, code = _stroke_cli_context(revision_dir, args)
+    if context is None:
+        return code
+    paths, job_path, _job, entries, source_ids = context
+    for entry in entries:
+        for fmt in ("png", "svg"):
+            try:
+                source = Path(entry["artifacts"][fmt])
+            except (KeyError, TypeError) as exc:
+                print(f"ERROR: colour job has no {fmt.upper()} artifact: {exc}",
+                      file=sys.stderr)
+                return 2
+            if not source.is_file() or source.stat().st_size == 0:
+                print(f"ERROR: source colour {fmt.upper()} missing: {source}", file=sys.stderr)
+                return 3
+    output_dir = (args.output_dir or job_path.parent / "strokes").resolve()
+    outputs = {
+        source_id: {
+            fmt: output_dir / f"stroke_texture_{source_id}.{fmt}"
+            for fmt in ("png", "svg", "pdf")
+        }
+        for source_id in source_ids
+    }
+    manifest_path = output_dir / "stroke_texture_manifest.json"
+    temporary = manifest_path.with_suffix(".json.tmp")
+    if manifest_path.exists() or temporary.exists() or any(path.exists() for artifacts in outputs.values()
+                                      for path in artifacts.values()):
+        print("ERROR: stroke artifacts already exist; choose a fresh --output-dir",
+              file=sys.stderr)
+        return 2
+    code = _run_blender_script(
+        "random_stroke_pattern.py", paths.source_blend,
+        ["--job", str(job_path), "--output-dir", str(output_dir),
+         "--modes", "camera_compensated_width", "--formats", "png", "svg", "pdf",
+         "--artifact-prefix", "stroke_texture", "--seed", str(args.seed),
+         "--camera-width-fraction", str(args.camera_width_fraction)],
+    )
+    if code != 0:
+        return code
+    missing = [path for artifacts in outputs.values() for path in artifacts.values()
+               if not path.is_file() or path.stat().st_size == 0]
+    if missing:
+        for path in missing:
+            print(f"ERROR: stroke artifact missing or empty: {path}", file=sys.stderr)
+        return 3
+    manifest = {
+        "schema": "orisys-sensor-design/stroke-texture-manifest-v1",
+        "revision_dir": str(paths.root),
+        "source_job": {"path": str(job_path), "sha256": sha256_file(job_path)},
+        "source_blend": {"path": str(paths.source_blend),
+                         "sha256": sha256_file(paths.source_blend)},
+        "settings": {"mode": "camera_compensated_width", "seed": args.seed,
+                     "camera_width_fraction": args.camera_width_fraction},
+        "outputs": [
+            {"id": source_id,
+             "sources": {fmt: {"path": str(Path(entry["artifacts"][fmt])),
+                               "sha256": sha256_file(Path(entry["artifacts"][fmt]))}
+                         for fmt in ("png", "svg")},
+             "artifacts": {fmt: {"path": str(outputs[source_id][fmt]),
+                                 "sha256": sha256_file(outputs[source_id][fmt])}
+                           for fmt in ("png", "svg", "pdf")}}
+            for source_id, entry in zip(source_ids, entries)
+        ],
+    }
+    temporary.write_text(json.dumps(manifest, indent=2) + "\n", encoding="utf-8")
+    temporary.replace(manifest_path)
+    artifacts = [path for entry in outputs.values() for path in entry.values()]
+    if console.get_level() == console.QUIET:
+        console.artifact_paths([*artifacts, manifest_path])
+    else:
+        console.report(f"OK: wrote {len(artifacts)} stroke texture artifacts to {output_dir}")
+        for path in artifacts:
+            console.report(f"  {path}")
+        console.report(f"  manifest: {manifest_path}")
+    return 0
+
+
 def cmd_texture_views(revision_dir: Path, args: argparse.Namespace) -> int:
     """Generate one owned texture per production view.
 
@@ -2202,6 +2297,32 @@ def main(argv: list[str] | None = None) -> None:
         help="Stroke width / projected camera-cell span (default: 0.5; width 0.11–0.28 mm)",
     )
 
+    stroke_p = sub.add_parser(
+        "stroke-texture",
+        help="Export Random Stroke Pattern PNG/SVG/PDF from colour artwork",
+    )
+    stroke_p.add_argument("revision_dir", type=Path)
+    stroke_p.add_argument(
+        "--views", action="store_true",
+        help="Use the existing two-view colour job and preserve its print ownership",
+    )
+    stroke_p.add_argument(
+        "--source-job", type=Path, default=None,
+        help="Existing colour job (default: revision build/textures job)",
+    )
+    stroke_p.add_argument(
+        "--output-dir", type=Path, default=None,
+        help="Fresh output directory (default: strokes beside the colour job)",
+    )
+    stroke_p.add_argument(
+        "--seed", type=int, default=7,
+        help="Reproducible stroke offsets and angles (default: 7)",
+    )
+    stroke_p.add_argument(
+        "--camera-width-fraction", type=float, default=0.5,
+        help="Stroke width / projected camera-cell span (default: 0.5; width 0.11–0.28 mm)",
+    )
+
     manifest_p = sub.add_parser("manifest", help="Write release manifest with file hashes")
     manifest_p.add_argument("revision_dir", type=Path)
     manifest_p.add_argument(
@@ -2597,6 +2718,8 @@ def main(argv: list[str] | None = None) -> None:
         code = cmd_texture_views(args.revision_dir, args)
     elif args.command == "binary-preview":
         code = cmd_binary_preview(args.revision_dir, args)
+    elif args.command == "stroke-texture":
+        code = cmd_stroke_texture(args.revision_dir, args)
     elif args.command == "inspect":
         code = cmd_inspect(args.revision_dir, args)
     elif args.command == "preview":

tests/test_stroke_texture_cli.py

@@ -0,0 +1,99 @@
+"""The stroke CLI must preserve colour sources and verify all exported formats."""
+
+from __future__ import annotations
+
+import argparse
+import json
+from pathlib import Path
+
+from orisys_sensor_design import cli
+from orisys_sensor_design.manifest import RevisionPaths, sha256_file
+
+REVISION = Path(__file__).resolve().parents[1] / "sensors" / "finger-xynova" / "r01"
+
+
+def _args(job: Path, output_dir: Path) -> argparse.Namespace:
+    return argparse.Namespace(
+        views=False,
+        source_job=job,
+        output_dir=output_dir,
+        camera_width_fraction=0.5,
+        seed=13,
+    )
+
+
+def _job(tmp_path: Path) -> tuple[Path, Path, Path]:
+    paths = RevisionPaths.from_revision_dir(REVISION)
+    png = tmp_path / "colour.png"
+    svg = tmp_path / "colour.svg"
+    png.write_bytes(b"colour pixels")
+    svg.write_bytes(b"<svg>colour geometry</svg>")
+    job_path = tmp_path / "_texture_job.json"
+    job_path.write_text(
+        json.dumps(
+            {
+                "schema": "orisys-sensor-design/texture-job-v3",
+                "revision_dir": str(paths.root),
+                "source_blend": str(paths.source_blend),
+                "outputs": [
+                    {
+                        "uv_map": "compute",
+                        "artifacts": {"png": str(png), "svg": str(svg)},
+                    }
+                ],
+            }
+        ),
+        encoding="utf-8",
+    )
+    return job_path, png, svg
+
+
+def test_stroke_cli_exports_three_formats_and_manifest(tmp_path, monkeypatch):
+    job, png, svg = _job(tmp_path)
+    output_dir = tmp_path / "strokes"
+    calls = []
+
+    def run_blender(script, blend, args):
+        calls.append((script, blend, args))
+        output_dir.mkdir()
+        for fmt in ("png", "svg", "pdf"):
+            (output_dir / f"stroke_texture_compute.{fmt}").write_bytes(fmt.encode())
+        return 0
+
+    monkeypatch.setattr(cli, "_run_blender_script", run_blender)
+    assert cli.cmd_stroke_texture(REVISION, _args(job, output_dir)) == 0
+    assert calls[0][0] == "random_stroke_pattern.py"
+    assert calls[0][2][-4:] == ["--seed", "13", "--camera-width-fraction", "0.5"]
+    manifest = json.loads((output_dir / "stroke_texture_manifest.json").read_text())
+    assert manifest["schema"] == "orisys-sensor-design/stroke-texture-manifest-v1"
+    assert manifest["source_job"]["sha256"] == sha256_file(job)
+    assert manifest["outputs"][0]["sources"]["png"]["sha256"] == sha256_file(png)
+    assert manifest["outputs"][0]["sources"]["svg"]["sha256"] == sha256_file(svg)
+    assert set(manifest["outputs"][0]["artifacts"]) == {"png", "svg", "pdf"}
+    assert png.read_bytes() == b"colour pixels"
+    assert cli.cmd_stroke_texture(REVISION, _args(job, output_dir)) == 2
+    assert len(calls) == 1
+
+
+def test_stroke_cli_refuses_missing_source_svg(tmp_path, monkeypatch):
+    job, _png, svg = _job(tmp_path)
+    svg.unlink()
+    monkeypatch.setattr(
+        cli,
+        "_run_blender_script",
+        lambda *_: (_ for _ in ()).throw(AssertionError("Blender must not run")),
+    )
+    assert cli.cmd_stroke_texture(REVISION, _args(job, tmp_path / "strokes")) == 3
+
+
+def test_stroke_cli_rejects_incomplete_source_job(tmp_path, monkeypatch):
+    job, _png, _svg = _job(tmp_path)
+    data = json.loads(job.read_text(encoding="utf-8"))
+    del data["outputs"][0]["artifacts"]["svg"]
+    job.write_text(json.dumps(data), encoding="utf-8")
+    monkeypatch.setattr(
+        cli,
+        "_run_blender_script",
+        lambda *_: (_ for _ in ()).throw(AssertionError("Blender must not run")),
+    )
+    assert cli.cmd_stroke_texture(REVISION, _args(job, tmp_path / "strokes")) == 2