POC

src/slic3r/GUI/Jobs/TextureDisplacementBakeJob.hpp

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+#ifndef slic3r_TextureDisplacementBakeJob_hpp_
+#define slic3r_TextureDisplacementBakeJob_hpp_
+
+#include <functional>
+#include <vector>
+
+#include "libslic3r/ObjectID.hpp"
+#include "libslic3r/TextureDisplacement.hpp"
+#include "libslic3r/TriangleMesh.hpp"
+
+#include "Job.hpp"
+
+namespace Slic3r::GUI {
+
+// Everything process() needs, captured by value on the main thread when the job is queued so the
+// worker thread never touches the live Model concurrently with the UI (mirrors how EmbossJob's
+// DataBase is captured before process() runs).
+struct TextureDisplacementBakeInput
+{
+    ObjectID                              volume_id;
+    indexed_triangle_set                  base_mesh;
+    std::vector<TextureDisplacementLayer> layers;
+    TextureDisplacementFacetsData         facets_data;
+};
+
+// Bakes a volume's painted texture-displacement layers into real mesh geometry in the background,
+// then commits the result on the main thread -- mirrors EmbossJob's UpdateJob/update_volume()
+// bake-and-commit pattern (see EmbossJob.cpp).
+class TextureDisplacementBakeJob : public Job
+{
+public:
+    TextureDisplacementBakeJob(TextureDisplacementBakeInput &&input, std::function<void()> on_finished);
+
+    void process(Ctl &ctl) override;
+    void finalize(bool canceled, std::exception_ptr &eptr) override;
+
+private:
+    TextureDisplacementBakeInput m_input;
+    TriangleMesh                 m_result;
+    std::function<void()>        m_on_finished;
+};
+
+// Captures `volume`'s current mesh/layers/paint data and queues a TextureDisplacementBakeJob on
+// the app's UI job worker. `on_finished` is always called once the job settles (success, failure,
+// or cancellation), so the caller can clear its own "bake in progress" UI state. Must be called
+// from the main thread.
+void queue_texture_displacement_bake(const ModelVolume &volume, std::function<void()> on_finished);
+
+} // namespace Slic3r::GUI
+
+#endif // slic3r_TextureDisplacementBakeJob_hpp_