Add stroke texture PNG, SVG, and PDF export

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

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"