Ultimaker · HellAholic · May 12, 2026 · Mar 23, 2026 · Mar 23, 2026 · Mar 24, 2026
diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -49,9 +49,7 @@ set(engine_SRCS # Except main.cpp.
         src/FffGcodeWriter.cpp
         src/FffPolygonGenerator.cpp
         src/FffProcessor.cpp
-        src/gcodeExport.cpp
         src/GCodePathConfig.cpp
-        src/GcodeTemplateResolver.cpp
         src/infill.cpp
         src/InfillOrderOptimizer.cpp
         src/InsetOrderOptimizer.cpp
@@ -68,6 +66,7 @@ set(engine_SRCS # Except main.cpp.
         src/PathAdapter.cpp
         src/PathOrderMonotonic.cpp
         src/Preheat.cpp
+        src/PrintInformation.cpp
         src/PrimeTower/PrimeTower.cpp
         src/PrimeTower/PrimeTowerNormal.cpp
         src/PrimeTower/PrimeTowerInterleaved.cpp
@@ -116,6 +115,11 @@ set(engine_SRCS # Except main.cpp.
         src/communication/EmscriptenCommunication.cpp
         src/communication/Listener.cpp
 
+        src/gcode_export/gcodeExport.cpp
+        src/gcode_export/FixedGCodePart.cpp
+        src/gcode_export/ResolvedGCodePart.cpp
+        src/gcode_export/GcodeTemplateResolver.cpp
+
         src/infill/AbstractLinesInfill.cpp
         src/infill/ImageBasedDensityProvider.cpp
         src/infill/NoZigZagConnectorProcessor.cpp

diff --git a/Cura.proto b/Cura.proto
@@ -151,6 +151,14 @@ message PrintTimeMaterialEstimates { // The print time for each feature and mate
 message MaterialEstimates {
     int64 id = 1;
     float material_amount = 2; // material used in the extruder
+    float material_length = 3; // Length if used filaments, in meters
+    float material_weight = 4; // Weight of used filament, in grams
+    float material_cost = 5;
+    string material_name = 6;
+}
+
+message InitialExtruder {
+    uint32 extruder_nr = 1;
 }
 
 message SettingList {

diff --git a/conandata.yml b/conandata.yml
@@ -1,7 +1,7 @@
 version: "5.14.0-alpha.0"
 commit: "unknown"
 requirements:
-  - "cura-formulae-engine/1.0.0"
+  - "cura-formulae-engine/1.1.0"
   - "scripta/[>=1.1.0]@ultimaker/testing"
   - "libpng/1.6.48"
   - "onetbb/2022.2.0"

diff --git a/include/ExtruderPlan.h b/include/ExtruderPlan.h
@@ -6,7 +6,7 @@
 
 #include "FanSpeedLayerTime.h"
 #include "RetractionConfig.h"
-#include "gcodeExport.h"
+#include "gcode_export/gcodeExport.h"
 #include "geometry/Point2LL.h"
 #include "pathPlanning/GCodePath.h"
 #include "pathPlanning/NozzleTempInsert.h"
@@ -131,6 +131,17 @@ class ExtruderPlan
      */
     std::shared_ptr<const SliceMeshStorage> findFirstPrintedMesh() const;
 
+    /*! \brief Calculates whether this extruder plan actually has at least one extrusion move */
+    bool hasExtrusion() const;
+
+    /*!
+     * \brief Calculate the total bounding box of extrusion moves
+     * \note This is not 100% accurate since at this point we don't know the start position of the extruder plan. So if the very first
+     *       move happens to be an extrusion move and the start position is the outermost of the bounding box, it will not be accounted
+     *       for and the bounding box will be approximate.
+     */
+    AABB calculateExtrusionBoundingBox() const;
+
 private:
     LayerIndex layer_nr_{ 0 }; //!< The layer number at which we are currently printing.
     bool is_initial_layer_{ false }; //!< Whether this extruder plan is printed on the very first layer (which might be raft)

diff --git a/include/FffGcodeWriter.h b/include/FffGcodeWriter.h
@@ -4,7 +4,6 @@
 #ifndef GCODE_WRITER_H
 #define GCODE_WRITER_H
 
-#include <fstream>
 #include <optional>
 
 #include "ExtruderUse.h"
@@ -13,7 +12,8 @@
 #include "LayerPlan.h"
 #include "LayerPlanBuffer.h"
 #include "LinesOrderingMethod.h"
-#include "gcodeExport.h"
+#include "PrintInformation.h"
+#include "gcode_export/gcodeExport.h"
 #include "utils/LayerVector.h"
 #include "utils/NoCopy.h"
 #include "utils/gettime.h"
@@ -61,11 +61,6 @@ class FffGcodeWriter : public NoCopy
      */
     GCodeExport gcode;
 
-    /*!
-     * The gcode file to write to when using CuraEngine as command line tool.
-     */
-    std::ofstream output_file;
-
     //!< For each layer, the extruders to be used in that layer in the order in which they are going to be used
     LayerVector<std::vector<ExtruderUse>> extruder_order_per_layer;
 
@@ -86,6 +81,8 @@ class FffGcodeWriter : public NoCopy
 
     std::string slice_uuid; //!< The UUID of the current slice.
 
+    PrintInformation print_info_; //!< Global print information calculated along slicing
+
 public:
     /*
      * \brief Construct a g-code writer.
@@ -95,49 +92,6 @@ class FffGcodeWriter : public NoCopy
      */
     FffGcodeWriter();
 
-    /*!
-     * Set the target to write gcode to: to a file.
-     *
-     * Used when CuraEngine is used as command line tool.
-     *
-     * \param filename The filename of the file to which to write the gcode.
-     */
-    bool setTargetFile(const char* filename);
-
-    /*!
-     * Set the target to write gcode to: an output stream.
-     *
-     * Used when CuraEngine is NOT used as command line tool.
-     *
-     * \param stream The stream to write gcode to.
-     */
-    void setTargetStream(std::ostream* stream);
-
-    /*!
-     * Wether or not the extruder is actually used in the print, regardless of enablement.
-     *
-     * \param extruder_nr The extruder number for which to get the useage
-     * \return actual use y/n boolean
-     */
-    bool getExtruderActualUse(int extruder_nr);
-
-    /*!
-     * Get the total extruded volume for a specific extruder in mm^3
-     *
-     * Retractions and unretractions don't contribute to this.
-     *
-     * \param extruder_nr The extruder number for which to get the total netto extruded volume
-     * \return total filament printed in mm^3
-     */
-    double getTotalFilamentUsed(int extruder_nr);
-
-    /*!
-     * Get the total estimated print time in seconds for each feature
-     *
-     * \return total print time in seconds for each feature
-     */
-    std::vector<Duration> getTotalPrintTimePerFeature();
-
     /*!
      * Write all the gcode for the current meshgroup.
      * This is the primary function of this class.

diff --git a/include/FffProcessor.h b/include/FffProcessor.h
@@ -47,49 +47,6 @@ class FffProcessor : public NoCopy
      */
     TimeKeeper time_keeper; // TODO: use singleton time keeper
 
-    /*!
-     * Set the target to write gcode to: to a file.
-     *
-     * Used when CuraEngine is used as command line tool.
-     *
-     * \param filename The filename of the file to which to write the gcode.
-     */
-    bool setTargetFile(const char* filename);
-
-    /*!
-     * Set the target to write gcode to: an output stream.
-     *
-     * Used when CuraEngine is NOT used as command line tool.
-     *
-     * \param stream The stream to write gcode to.
-     */
-    void setTargetStream(std::ostream* stream);
-
-    /*!
-     * Wether or not the extruder is actually used in the print, regardless of enablement.
-     *
-     * \param extruder_nr The extruder number for which to get the useage
-     * \return actual use y/n boolean
-     */
-    bool getExtruderActualUse(int extruder_nr);
-
-    /*!
-     * Get the total extruded volume for a specific extruder in mm^3
-     *
-     * Retractions and unretractions don't contribute to this.
-     *
-     * \param extruder_nr The extruder number for which to get the total netto extruded volume
-     * \return total filament printed in mm^3
-     */
-    double getTotalFilamentUsed(int extruder_nr);
-
-    /*!
-     * Get the total estimated print time in seconds for each feature
-     *
-     * \return total print time in seconds for each feature
-     */
-    std::vector<Duration> getTotalPrintTimePerFeature();
-
     /*!
      * Add the end gcode and set all temperatures to zero.
      */

diff --git a/include/GcodeTemplateResolver.h b/include/GcodeTemplateResolver.h
diff --git a/include/LayerPlan.h b/include/LayerPlan.h
@@ -9,7 +9,7 @@
 #include "InsetOrderOptimizer.h"
 #include "PathOrderOptimizer.h"
 #include "SpaceFillType.h"
-#include "gcodeExport.h"
+#include "gcode_export/gcodeExport.h"
 #include "geometry/LinesSet.h"
 #include "geometry/MendedShape.h"
 #include "geometry/Polygon.h"
@@ -917,6 +917,15 @@ class LayerPlan : public NoCopy
      */
     std::shared_ptr<const SliceMeshStorage> findFirstPrintedMesh() const;
 
+    /*!
+     * \brief Find the first actually extruding extruder for this layer
+     * \return The first extruder actually extruding, or nullopt if there is no extrusion in this layer
+     */
+    std::optional<size_t> findInitialExtruderNr() const;
+
+    /*! Calculate the actual extrusion bounding box in this layer */
+    AABB calculateExtrusionBoundingBox() const;
+
     /*! Indicates whether this layer plan is empty, i.e. it has no extruder plan or they are all empty */
     const bool empty() const;
 

diff --git a/include/PrintInformation.h b/include/PrintInformation.h
@@ -0,0 +1,40 @@
+// Copyright (c) 2026 UltiMaker B.V.
+// CuraEngine is released under the terms of the AGPLv3 or higher.
+
+#ifndef PRINTINFORMATION_H
+#define PRINTINFORMATION_H
+
+#include <optional>
+#include <string>
+#include <vector>
+
+#include "utils/AABB.h"
+
+namespace cura
+{
+
+class LayerPlan;
+class SliceDataStorage;
+
+/*! \brief Contains the end-of-print info about used material for an extruder */
+struct ExtruderPrintInformation
+{
+    float filament_amount{}; // Material volume in mm3
+    float filament_length{}; // Filament length in m
+    float filament_weight{}; // Filament weight in grams
+    float filament_cost{}; // Filament cost (unspecified currency)
+    std::string material_name; // Material full name
+};
+
+struct PrintInformation
+{
+    std::vector<std::optional<ExtruderPrintInformation>> extruders_info; // One per extruder, but no value if the extruder is unused
+    std::optional<size_t> initial_extruder_nr;
+    AABB initial_layer_bb;
+
+    void updateWithLayer(const LayerPlan* layer_plan);
+};
+
+} // namespace cura
+
+#endif // PRINTINFORMATION_H
diff --git a/include/communication/ArcusCommunication.h b/include/communication/ArcusCommunication.h
@@ -56,16 +56,8 @@ class ArcusCommunication : public Communication
      */
     void connect(const std::string& ip, const uint16_t port);
 
-    /*
-     * \brief Indicate that we're beginning to send g-code.
-     */
-    void beginGCode() override;
-
-    /*
-     * \brief Flush all g-code still in the stream into a message queued in the
-     * socket.
-     */
-    void flushGCode() override;
+    /* \brief Sends a piece of GCode that is ready to be exported */
+    void sendGCodePart(const std::string& gcode_part) override;
 
     /*
      * \brief Indicates that for Arcus we don't need to send the g-code from
@@ -143,10 +135,11 @@ class ArcusCommunication : public Communication
     void sendOptimizedLayerData() override;
 
     /*
-     * \brief Send an estimate of how long the print would take and how much
-     * material it would use.
+     * \brief Send an estimate of how long the print would take and how much material it would use.
+     * \param time_estimates The calculated time estimations, per extruder
+     * \param print_information The calculated materials consumptions, per extruder
      */
-    void sendPrintTimeMaterialEstimates() const override;
+    void sendPrintInformation(const std::vector<cura::Duration>& time_estimates, const PrintInformation& print_information) const override;
 
     /*
      * \brief Communicate to Arcus what our progress is.