1 files changed, 59 insertions, 0 deletions
diff --git a/src/libslic3r/ExtrusionSimulator.hpp b/src/libslic3r/ExtrusionSimulator.hpp
new file mode 100644
index 000000000..040406766
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+++ b/src/libslic3r/ExtrusionSimulator.hpp
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+#ifndef slic3r_ExtrusionSimulator_hpp_
+#define slic3r_ExtrusionSimulator_hpp_
+
+#include "libslic3r.h"
+#include "ExtrusionEntity.hpp"
+#include "BoundingBox.hpp"
+
+namespace Slic3r {
+
+enum ExtrusionSimulationType
+{
+    ExtrusionSimulationSimple,
+    ExtrusionSimulationDontSpread,
+    ExtrisopmSimulationSpreadNotOverfilled,
+    ExtrusionSimulationSpreadFull,
+    ExtrusionSimulationSpreadExcess
+};
+
+// An opaque class, to keep the boost stuff away from the header.
+class ExtrusionSimulatorImpl;
+
+class ExtrusionSimulator
+{
+public:
+    ExtrusionSimulator();
+    ~ExtrusionSimulator();
+
+    // Size of the image, that will be returned by image_ptr().
+    // The image may be bigger than the viewport as many graphics drivers 
+    // expect the size of a texture to be rounded to a power of two.
+    void  		set_image_size(const Point &image_size);
+    // Which part of the image shall be rendered to?
+    void  		set_viewport(const BoundingBox &viewport);
+    // Shift and scale of the rendered extrusion paths into the viewport.
+    void		set_bounding_box(const BoundingBox &bbox);
+
+    // Reset the extrusion accumulator to zero for all buckets.
+    void		reset_accumulator();
+    // Paint a thick path into an extrusion buffer.
+    // A simple implementation is provided now, splatting a rectangular extrusion for each linear segment.
+    // In the future, spreading and suqashing of a material will be simulated.
+    void		extrude_to_accumulator(const ExtrusionPath &path, const Point &shift, ExtrusionSimulationType simulationType);
+    // Evaluate the content of the accumulator and paint it into the viewport.
+    // After this call the image_ptr() call will return a valid image.
+    void		evaluate_accumulator(ExtrusionSimulationType simulationType);
+    // An RGBA image of image_size, to be loaded into a GPU texture.
+    const void* image_ptr() const;
+
+private:
+	Point					    	image_size;
+	BoundingBox				    	viewport;
+	BoundingBox 					bbox;
+
+	ExtrusionSimulatorImpl		   *pimpl;
+};
+
+}
+
+#endif /* slic3r_ExtrusionSimulator_hpp_ */