Extract stroke draw samples request assembly

src/canvas.cpp

@@ -759,11 +759,26 @@ glm::vec4 Canvas::stroke_draw_samples(
                 m_tex[i].unbind();
             });
     const auto result = pp::panopainter::execute_legacy_canvas_stroke_face_sample_polygon(
-        pp::panopainter::LegacyStrokeFaceSamplePolygonExecutionRequest {
+        make_stroke_draw_samples_request(
+            i,
+            P,
+            copy_stroke_destination),
+        destination_texture_binding,
+        destination_texture_dispatch);
+
+    return result.dirty_bounds;
+}
+
+pp::panopainter::LegacyStrokeFaceSamplePolygonExecutionRequest Canvas::make_stroke_draw_samples_request(
+    int face_index,
+    std::vector<vertex_t>& polygon_vertices,
+    bool copy_stroke_destination) const
+{
+    return pp::panopainter::LegacyStrokeFaceSamplePolygonExecutionRequest {
         .context = "Canvas::stroke_draw_samples",
         .target_size = { m_width, m_height },
-            .polygon_vertices = P,
-            .face_index = i,
+        .polygon_vertices = polygon_vertices,
+        .face_index = face_index,
         .copy_stroke_destination = copy_stroke_destination,
         .copy_framebuffer_to_destination_texture = [](
             int,
@@ -783,11 +798,7 @@ glm::vec4 Canvas::stroke_draw_samples(
         .draw_brush_shape = [&](int) {
             m_brush_shape.draw_fill();
         },
-        },
-        destination_texture_binding,
-        destination_texture_dispatch);
-
-    return result.dirty_bounds;
+    };
 }
 
 template <typename BuildRequest>

src/canvas.h

@@ -279,6 +279,10 @@ private:
     void draw_merge_final_plane_composite(
         const glm::mat4& ortho,
         bool draw_checkerboard);
+    pp::panopainter::LegacyStrokeFaceSamplePolygonExecutionRequest make_stroke_draw_samples_request(
+        int face_index,
+        std::vector<vertex_t>& polygon_vertices,
+        bool copy_stroke_destination) const;
     void stroke_draw_dual_pass(
         const std::vector<StrokeFrame>& frames_dual,
         const std::array<pp::panopainter::LegacyCanvasStrokeTextureBinding, 1>& dual_pass_texture_bindings,